:root {
  --brand: #ffe5b4;
  --brand-hover: #ffdab9;
  --accent-blue-baby: #b4ceff;
  --accent-blue: #3b82f6;
  --accent-lavender: #c084fc;
  --accent-rose: #fb7185;
  --nav-correct-border: #1fb37a;
  --nav-correct-bg: #e9f7f0;
  --nav-incorrect-border: #ea5a6b;
  --nav-incorrect-bg: #fff1f2;
  --brand-success-bg: #b4ceff;
  --brand-success-text: #1e3a8a;
  --brand-warning-bg: #ffedd5;
  --brand-warning-text: #9a3412;
  --success: #16a34a;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --brand-blue: #3b82f6;
  --bg-app: #f9fafb;
  --bg-surface: #ffffff;
  --bg-surface-alt: #f3f4f6;
  --bg-surface-warm: #fff7ed;
  --surface: var(--bg-surface);
  --surface-alt: var(--bg-surface-alt);
  --text: #111827;
  --text-secondary: #4b5563;
  --text-disabled: #9ca3af;
  --text-muted: #9ca3af;
  --text-on-brand: #1f2937;
  --muted: #6b7280;
  --brand-dark: #1f2937;
  --border: #e5e7eb;
  --shadow-1: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-2: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-glow: 0 0 15px rgba(255, 229, 180, 0.5);
  --radius-sm: 12px;
  --radius-btn: 12px;
  --radius-md: 20px;
  --radius-lg: 24px;
  --radius-pill: 9999px;
  --footer-height: 96px;
  --header-height: 64px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'DM Sans', 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-app);
  color: var(--text-secondary);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

.is-hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 24px;
  height: var(--header-height);
  background-color: var(--bg-surface);
  color: var(--text);
  position: sticky;
  
  top: 0;
  border-bottom: 1px solid var(--border);
  
  z-index: 100;
}

.site-header__brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.35rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  
}

.site-header__brand::after {
  content: '.';
  color: var(--brand);
  
  font-size: 1.5rem;
  line-height: 0;
  position: relative;
  top: 2px;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-header__nav a {
  color: var(--text-secondary);
  margin-left: 8px;
  padding: 8px 14px;
  height: auto;
  border-radius: var(--radius-btn);
  
  display: inline-flex;
  align-items: center;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  transition: all 0.2s ease;
}

.site-header__nav a:hover,
.site-header__nav a.active {
  color: var(--accent-blue);
  
  background-color: var(--accent-blue-baby);
  
  transform: translateY(-1px);
}

.site-header__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  background: transparent;
}

.site-header__toggle span {
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

.site-header__donate {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  height: 40px;
  border-radius: var(--radius-pill);
  margin-left: 16px;
  background-color: var(--brand);
  color: #fff !important;
  font-weight: 500;
  border: none;
  
  
  transition: background-color 0.2s, transform 0.1s;
}

.site-header__donate:hover {
  text-decoration: none;
  background-color: var(--brand-hover);
  
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  .site-header {
    flex-wrap: wrap;
    padding: 12px 20px;
    height: auto;
  }

  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    margin-top: 16px;
    display: none;
    border-top: 1px solid var(--border);
    padding-top: 16px;
    height: auto;
  }

  .site-header__nav.is-open {
    display: flex;
  }

  .site-header__nav a {
    margin: 0;
    padding: 12px 16px;
    border-radius: 4px;
    border-bottom: none;
    height: auto;
    width: 100%;
  }

  .site-header__nav a.active {
    background-color: rgba(26, 115, 232, 0.1);
    border-bottom: none;
  }

  .site-header__donate {
    margin-left: 0;
    margin-top: 8px;
    width: 100%;
  }
}

.container {
  max-width: 1400px;
  margin: 32px auto 64px auto;
  padding: 0 24px;
}

.card {
  background-color: var(--bg-surface);
  
  border-radius: var(--radius-md);
  
  padding: 24px;
  border: 1px solid var(--border);
  
  
  margin-bottom: 24px;
}

.card:hover {
  
  
  border-color: var(--border);
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  align-items: stretch;
  margin-bottom: 24px;
}

.chart-grid .card {
  margin-bottom: 0;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.chart-container {
  position: relative;
  width: 100%;
  min-height: 280px;
  margin-top: 12px;
}

.chart-container canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
}

.chart-container--tall {
  min-height: 400px;
}

.chart-container--square {
  aspect-ratio: 4 / 3;
  min-height: 260px;
}

.chart-container--short {
  aspect-ratio: 4 / 1;
  min-height: 100px;
}

.card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.card--subdued {
  
  border: 1px solid var(--border);
  background-color: #f8f9fa;
  
}

.review-questions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
}

.review-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  background: var(--surface);
  
}

.review-panel:hover {
  
  border-color: transparent;
}

.review-panel+.review-panel {
  margin-top: 18px;
}

.review-panel__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 10px;
}

.table-topic {
  font-weight: 600;
}

.table-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px 24px;
  align-items: start;
}

.create-user-inline {
  margin-top: 16px;
  padding: 14px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(248, 250, 255, 0.9), rgba(235, 240, 255, 0.7));
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.create-user-inline form {
  display: grid;
  gap: 12px;
  align-items: end;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

@media (min-width: 900px) {
  .create-user-inline form {
    grid-template-columns: 1.2fr 1.1fr auto;
  }
}

.inline-form__note {
  margin: 0;
  font-size: 14px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.test-builder {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-helper {
  margin-top: 4px;
}

.builder-row {
  display: grid;
  gap: 16px 20px;
  width: 100%;
}

.builder-row--primary {
  grid-template-columns: minmax(220px, 2fr) 0.8fr 1fr 1fr;
  grid-template-areas: "name count status mode";
  align-items: end;
}

.builder-field--name {
  grid-area: name;
}

.builder-field--status {
  grid-area: status;
}

.builder-field--count {
  grid-area: count;
}

.builder-field--mode {
  grid-area: mode;
}

.builder-field--count input {
  max-width: 160px;
  width: 100%;
}

.builder-row--filters {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  align-items: start;
}

.builder-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px;
  border: 1px solid rgba(10, 132, 255, 0.08);
  border-radius: 14px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.9), rgba(234, 241, 255, 0.72));
  min-width: 0;
}

.builder-column .checkbox-grid {
  width: 100%;
  padding: 0;
}

.builder-collapse {
  border: 1px solid rgba(10, 132, 255, 0.08);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.88);
  padding: 0 16px 12px;
  margin: 4px 0;
  
}

.builder-collapse summary {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 14px 0;
  font-weight: 700;
  color: var(--text);
  list-style: none;
}

.builder-collapse summary::-webkit-details-marker {
  display: none;
}

.builder-collapse::after {
  content: "";
  display: block;
  height: 1px;
  background: rgba(15, 23, 42, 0.08);
  margin: 0;
  width: 100%;
}

.builder-collapse__content {
  padding-top: 10px;
}

@media (max-width: 960px) {
  .builder-row--primary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-areas:
      "name count"
      "status mode";
  }

  .builder-row--filters {
    grid-template-columns: 1fr;
  }

  .builder-field--count input {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .builder-row--primary {
    grid-template-columns: 1fr;
    grid-template-areas:
      "name"
      "status"
      "count"
      "mode";
  }
}

.form-group--full {
  grid-column: 1 / -1;
}

.form-group--inline {
  display: flex;
  gap: 8px;
  align-items: stretch;
}

.form-group--inline input {
  flex: 1;
  width: auto;
  min-width: 0;
}

.form-group--inline .btn {
  white-space: nowrap;
  flex-shrink: 0;
}

.form-group label {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 6px;
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"],
select,
textarea {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  
  padding: 10px 12px;
  font-size: 0.95rem;
  background-color: #fff;
  color: var(--text);
  
  width: 100%;
}

input::placeholder,
textarea::placeholder {
  color: var(--text-muted);
  opacity: 1;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--brand-blue);
  
  
}

.input-shell {
  
  position: relative;
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 4px;
  
  background-color: var(--surface);
  padding: 0;
}

.input-shell select {
  border: none;
  background: transparent;
  padding: 10px 32px 10px 12px;
  width: 100%;
  appearance: none;
}

.input-shell::after {
  content: '';
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid var(--text-secondary);
  pointer-events: none;
}

.input-shell:focus-within {
  border-color: var(--brand);
  
}

select[multiple] {
  min-height: 120px;
}

small {
  color: var(--text-secondary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  background-color: transparent;
  color: var(--text-secondary);
  
  border-radius: var(--radius-btn);
  
  padding: 0 20px;
  height: 42px;
  font-size: 0.95rem;
  font-weight: 600;
  
  letter-spacing: -0.01em;
  
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn:hover {
  text-decoration: none;
  background-color: var(--bg-surface-alt);
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
  filter: grayscale(1);
}

.btn--sm {
  height: 32px;
  padding: 0 12px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn--primary {
  background-color: var(--brand);
  
  color: var(--text-on-brand);
  
  border: 1px solid rgba(0, 0, 0, 0.05);
  
  
}

.btn--primary:hover {
  background-color: var(--brand-hover);
  
  color: var(--text-on-brand);
  
  transform: translateY(-1px);
}

.btn--link {
  color: var(--brand-blue);
  
  background: transparent;
  padding: 0 4px;
  height: auto;
  min-width: 0;
  font-weight: 500;
}

.btn--link:hover {
  background-color: transparent;
  text-decoration: underline;
  color: var(--text);
}

.btn--link-danger {
  color: #dc2626;
}

.btn--link-danger:hover {
  color: #b91c1c;
  background-color: transparent;
  text-decoration: underline;
}

.btn--ghost {
  background-color: #fff;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  
}

.btn--ghost:hover {
  background-color: var(--bg-surface-alt);
  border-color: var(--border);
  color: var(--text);
}

.btn--danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.btn--danger:hover {
  background: var(--danger-hover);
  color: #fff;
}

.flag-icon-wrapper {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
}

.icon-flag {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.icon-flag--filled {
  color: var(--accent-rose);
}

#flag-btn.is-flagged {
  color: var(--accent-rose);
}

.flash-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px 0;
}

.flash {
  padding: 12px 16px;
  border-radius: 4px;
  margin-bottom: 12px;
  font-size: 0.95rem;
  border: 1px solid transparent;
  display: flex;
  align-items: center;
}

.flash--success {
  background-color: #e6f4ea;
  color: #1e8e3e;
  
  border: none;
}

.flash--error {
  background-color: #fce8e6;
  color: #d93025;
  
  border: none;
}

.flash--info {
  background-color: #e8f0fe;
  color: #1967d2;
  
  border: none;
}

.flash--warning {
  background-color: #fef7e0;
  color: #e37400;
  
  border: none;
}

.flash__text {
  flex: 1;
  min-width: 0;
  line-height: 1.5;
}

.flash a {
  color: inherit;
  font-weight: 600;
  text-decoration: underline;
}

.table-responsive {
  overflow-x: auto;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.filter-pill {
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  height: 32px;
  border-radius: 999px;
  
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

.filter-pill:hover {
  background-color: var(--surface-alt);
  border-color: var(--text-disabled);
}

.filter-pill--active {
  background-color: #e8f0fe;
  
  color: var(--brand);
  
  border-color: transparent;
}

.filter-pill--active:hover {
  background-color: #d2e3fc;
  
  
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.875rem;
  background: transparent;
  
}

.dashboard-table thead th {
  background: var(--surface-alt);
  
  color: var(--text);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.dashboard-table tbody tr:hover {
  background-color: var(--surface-alt);
}

.dashboard-table tbody tr:nth-child(even) {
  background: rgba(234, 241, 255, 0.4);
}

.dashboard-table tbody tr:last-child td {
  border-bottom: none;
}

.dashboard-table tbody td:first-child {
  font-weight: 600;
}

.dashboard-table td {
  overflow-wrap: anywhere;
  word-break: break-word;
  white-space: normal;
}

.dashboard-table td:nth-child(3),
.dashboard-table td:nth-child(4) {
  text-align: center;
  white-space: nowrap;
}

.dashboard-table td.dashboard-share {
  min-width: 240px;
}

.dashboard-table td.dashboard-actions {
  width: 140px;
  white-space: nowrap;
}

.muted {
  color: var(--muted);
}

.text-muted {
  color: var(--muted);
  font-size: 0.9rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 12px 0 20px;
  font-size: 0.95rem;
  color: var(--muted);
}

.breadcrumb a {
  color: inherit;
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--brand);
}

.submission-meta {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.submission-meta li {
  background-color: var(--surface-alt);
  border-radius: 4px;
  padding: 12px;
  border: 1px solid var(--border);
  font-size: 0.95rem;
  color: var(--text);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.summary-grid+.card {
  margin-top: 24px;
}

.summary-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  background-color: var(--surface);
  
  
  display: flex;
  flex-direction: column;
}

.summary-label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  font-weight: 500;
}

.site-footer {
  text-align: center;
  padding: 12px 16px 16px;
  color: rgba(15, 23, 42, 0.6);
  font-size: 0.9rem;
}

.site-footer.site-footer--auth {
  color: rgba(15, 23, 42, 0.85);
}

@media (max-width: 640px) {
  .marketing-hero {
    padding: 56px 20px 72px;
    text-align: left;
  }

  .marketing-callout {
    margin: 18px 0 24px;
  }

  .marketing-main {
    margin: -40px auto 0;
    padding: 0 20px 80px;
  }

  .marketing-section {
    padding: 28px 22px 32px;
  }

  .marketing-cta {
    padding: 28px 22px;
  }

  .summary-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .summary-item {
    padding: 20px;
  }
}

.summary-value {
  font-size: 1.8rem;
  font-weight: 600;
}

.highlight {
  
  background: rgba(243, 255, 10, 0.14);
}

.strike,
.answer-option.strike {
  text-decoration: line-through;
  opacity: 0.7;
}

.explanation-body {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (max-width: 900px) {
  .practice-layout {
    display: block;
    padding-left: 0;
    margin: 0 auto calc(var(--footer-height) + 48px);
  }

  .question-sidebar {
    display: none !important;
  }

  .practice-footer {
    flex-wrap: nowrap;
    justify-content: center;
    gap: 12px;
    padding: 12px 16px;
  }

  .practice-footer .footer-group {
    flex: 1 1 0;
    justify-content: center;
    min-width: 0;
  }

  .practice-footer .footer-group:first-child,
  .practice-footer .footer-group:nth-child(2),
  .practice-footer .footer-group:last-child {
    flex: 1 1 0;
    justify-content: center;
  }

  .practice-footer button {
    width: 100%;
  }
}

.auth-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 18px;
  min-height: 100vh;
  background-color: var(--bg-surface);
  
  background-image: none;
  
  padding: 24px;
}

.auth-card {
  width: 360px;
  background-color: #fff;
  border-radius: 28px;
  
  padding: 32px 28px;
  
  border: 1px solid var(--border);
  backdrop-filter: none;
}

.auth-card h1 {
  margin-top: 0;
  margin-bottom: 24px;
  font-size: 1.5rem;
  font-weight: 400;
  
  text-align: center;
}

.auth-promo {
  margin: 0 0 16px 0;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--brand);
  
  background: transparent;
  padding: 10px 0;
  border-radius: 0;
  text-align: center;
}

.auth-card form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  
}

.auth-card input[type="text"],
.auth-card input[type="password"] {
  border-radius: 12px;
  border: 1px solid rgba(15, 23, 42, 0.1);
  padding: 11px 12px;
  font-size: 1rem;
}

.auth-card button {
  margin-top: 8px;
}

.auth-footnote {
  margin-top: 20px;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px 16px;
  padding: 4px 0 8px 0;
}

.checkbox-grid--topics {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.94);
  
}

.checkbox-item input {
  width: 16px;
  height: 16px;
}

.checkbox-item:hover {
  border-color: rgba(10, 132, 255, 0.5);
  background: rgba(234, 241, 255, 0.85);
  
}

@media (min-width: 900px) {
  .checkbox-grid--topics {
    grid-template-columns: repeat(3, minmax(220px, 1fr));
  }
}

.session-status {
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--muted);
}

.session-status.is-complete {
  color: var(--success);
  font-weight: 600;
}

.feedback-note {
  margin-top: 10px;
  padding: 10px 12px;
  background: #fff4e8;
  border-left: 3px solid var(--brand);
  border-radius: 10px;
  color: var(--muted);
}

.practice-completed .answer-option {
  pointer-events: none;
  cursor: default;
  opacity: 0.9;
}

.practice-completed .answer-option:hover {
  transform: none;
}

.sidebar-btn.is-correct {
  border-color: rgba(111, 179, 111, 0.45);
  background: #eaf6e6;
}

.sidebar-btn.is-incorrect {
  border-color: rgba(233, 138, 128, 0.45);
  background: #fde5e5;
}

.sidebar-header {
  display: flex;
  justify-content: center;
  align-items: center;
}

.question-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.question-nav__flag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 8px;
  color: var(--accent-rose);
  line-height: 0;
}

.question-nav {
  border: 1px solid rgba(15, 23, 42, 0.08);
  background: rgba(255, 255, 255, 0.96);
  border-radius: 12px;
  padding: 10px 12px;
  text-align: left;
  cursor: pointer;
  
}

.question-nav:hover,
.question-nav.is-active {
  border-color: rgba(10, 132, 255, 0.4);
  background: rgba(234, 241, 255, 0.9);
  
  transform: translateY(-1px);
}

.question-nav.is-correct {
  border-color: var(--nav-correct-border);
  background: var(--nav-correct-bg);
  
}

.question-nav.is-correct:hover,
.question-nav.is-correct.is-active {
  border-color: #179866;
  background: linear-gradient(135deg, var(--nav-correct-bg), rgba(31, 179, 122, 0.1));
  
}

.question-nav.is-incorrect {
  border-color: var(--nav-incorrect-border);
  background: var(--nav-incorrect-bg);
  
}

.question-nav.is-incorrect:hover,
.question-nav.is-incorrect.is-active {
  border-color: #d74357;
  background: linear-gradient(135deg, var(--nav-incorrect-bg), rgba(234, 90, 107, 0.08));
  
}

.practice-layout {
  display: flex;
  flex-direction: column;
  gap: 24px;
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding-bottom: 80px;
  
}

.question-sidebar {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  border-right: none;
  background: var(--bg-surface);
  margin-bottom: 24px;
  overflow: visible;
}

.question-main {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 24px;
  overflow: visible;
  height: auto;
}

#question-card {
  height: auto;
  overflow: visible;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.explanation-card {
  display: none;
}

.explanation-card:not(.is-hidden) {
  display: block;
  margin-top: 24px;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.explanation-card--deep-active {
  border: 2px solid transparent;
  background: linear-gradient(#f8f9fa, #f8f9fa) padding-box,
    linear-gradient(120deg, #3b82f6, #fb7185, #ffb347) border-box;
  box-shadow: 0 14px 40px -22px rgba(59, 130, 246, 0.45);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.explanation-card--deep-active:hover {
  border-color: transparent;
  background: linear-gradient(#f8f9fa, #f8f9fa) padding-box,
    linear-gradient(120deg, #3b82f6, #fb7185, #ffb347) border-box;
  box-shadow: 0 14px 40px -22px rgba(59, 130, 246, 0.45);
}

.tab-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.tab-btn {
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-weight: 600;
  cursor: pointer;
}

.tab-btn.is-active {
  background: var(--brand);
  color: var(--text-on-brand);
  border-color: var(--brand-hover);
}

.tab-panels {
  position: relative;
  flex: 1;
}

.tab-panel {
  display: none;
  height: 100%;
  overflow-y: auto;
  padding-right: 4px;
}

.tab-panel.is-active {
  display: block;
}

#deep-panel {
  flex-direction: column;
  min-height: 0;
}

#deep-panel.is-active {
  display: flex;
}

.deep-learn-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1 1 auto;
  min-height: 0;
  overflow: visible;
}

.deep-learn-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  padding: 12px 0 4px;
}

.deep-learn-actions__copy {
  color: var(--text);
  font-weight: 600;
}

.deep-learn-actions__note {
  font-size: 0.9rem;
}

.deep-learn-actions__cta {
  display: flex;
  justify-content: center;
  width: 100%;
}

.btn--deep-learn {
  border: 2px solid transparent;
  background: linear-gradient(#fff, #fff) padding-box,
    linear-gradient(120deg, #3b82f6, #fb7185, #ffb347) border-box;
  color: var(--text);
  box-shadow: 0 12px 30px -18px rgba(59, 130, 246, 0.5);
}

.btn--deep-learn:hover {
  background: linear-gradient(#fff, #fff) padding-box,
    linear-gradient(120deg, #3b82f6, #fb7185, #ffb347) border-box;
  color: var(--text);
  transform: translateY(-1px);
}

.deep-learn-table table {
  width: 100%;
  border-collapse: collapse;
}

.deep-learn-table th,
.deep-learn-table td {
  border: 1px solid var(--border);
  padding: 6px 8px;
  text-align: left;
}

.lesson-practice-actions {
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.deep-learn-table__title {
  font-weight: 700;
  margin-bottom: 6px;
}

.deep-podcast {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px;
  padding-top: 1.5rem;
  
  margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.04), rgba(251, 113, 133, 0.04));
  border: 1px solid rgba(59, 130, 246, 0.12);
  border-radius: var(--radius-md);
}

.deep-podcast__header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.deep-podcast__label {
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

@media (prefers-color-scheme: dark) {
  .deep-podcast__label {
    color: var(--brand);
  }
}

.deep-podcast__player {
  width: 100%;
}

.deep-podcast__status {
  font-size: 0.9rem;
  text-align: center;
}

.deep-podcast__note {
  font-size: 0.9rem;
  text-align: center;
  color: var(--muted);
}

.deep-podcast__cta {
  display: flex;
  justify-content: center;
  width: 100%;
  margin-top: 4px;
}

.podcast-audio {
  width: 100%;
  border-radius: 8px;
}

.btn--podcast {
  border: 2px solid transparent;
  background: linear-gradient(#fff, #fff) padding-box,
    linear-gradient(120deg, #3b82f6, #8b5cf6, #ec4899) border-box;
  color: var(--text);
  box-shadow: 0 10px 25px -16px rgba(139, 92, 246, 0.45);
  padding: 10px 20px;
}

.btn--podcast:hover {
  background: linear-gradient(#fff, #fff) padding-box,
    linear-gradient(120deg, #3b82f6, #8b5cf6, #ec4899) border-box;
  color: var(--text);
  transform: translateY(-1px);
}

@media (prefers-color-scheme: dark) {
  .btn--podcast {
    background: linear-gradient(var(--surface), var(--surface)) padding-box,
      linear-gradient(120deg, #3b82f6, #8b5cf6, #ec4899) border-box;
    color: var(--text);
  }

  .btn--podcast:hover {
    background: linear-gradient(var(--surface-alt), var(--surface-alt)) padding-box,
      linear-gradient(120deg, #3b82f6, #8b5cf6, #ec4899) border-box;
    color: var(--text);
  }
}

@media (min-width: 1024px) {
  .practice-layout {
    display: grid;
    grid-template-columns: minmax(180px, 0.14fr) minmax(0, 0.86fr);
    gap: 24px;
    height: calc(100vh - var(--header-height) - var(--footer-height));
    overflow: hidden;
    background-color: var(--bg-app);
    
    max-width: 100%;
    margin: 0 auto;
    padding: 24px;
    padding-bottom: 16px;
    align-items: stretch;
  }

  .question-sidebar {
    position: relative;
    width: 100%;
    min-width: 200px;
    max-width: 280px;
    top: auto;
    left: auto;
    right: auto;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 18px;
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    border: 1px solid var(--border);
    
    overflow: hidden;
    height: 100%;
    align-self: stretch;
    min-height: 0;
  }

  .question-main {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 0;
    overflow: hidden;
    height: 100%;
    align-items: stretch;
  }

  #question-card {
    flex: 1;
    margin: 0;
    height: 100%;
    overflow-y: auto;
    min-width: 0;
  }

  .explanation-card {
    flex: 1;
    margin: 0;
    height: 100%;
    overflow-y: auto;
    min-width: 0;
    display: none;
  }

  .explanation-card:not(.is-hidden) {
    display: flex;
    flex-direction: column;
    margin-top: 0;
  }

  .question-main.question-main--with-explanation {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .question-list {
    flex: 1;
    overflow-y: auto;
    padding-right: 8px;
    min-height: 0;
  }
}

.question-top {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.question-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
}

.question-actions--top {
  margin-left: auto;
}

.question-actions--top .btn {
  padding: 0 12px;
  height: 36px;
  font-size: 0.9rem;
}

.question-actions--top #timer-display {
  padding: 0.2rem 0.65rem;
  font-size: 0.9rem;
}

.question-validity {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.question-verify-actions {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-left: auto;
}

.question-verify-actions .btn {
  height: 34px;
}

.validity-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1;
}

.validity-pill__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.validity-icon {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.validity-pill__text {
  font-weight: 600;
  color: inherit;
}

.validity-pill--low {
  color: #dc2626;
  background: #fef2f2;
  border-color: rgba(220, 38, 38, 0.18);
}

.validity-pill--medium {
  color: #d97706;
  background: #fffbeb;
  border-color: rgba(217, 119, 6, 0.18);
}

.validity-pill--high {
  color: #15803d;
  background: #ecfdf3;
  border-color: rgba(21, 128, 61, 0.18);
}

.verification-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(210, 161, 26, 0.45);
  background: linear-gradient(135deg, #fff7dd, #fff0c2);
  color: #c58a00;
  box-shadow: var(--shadow-1);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  position: relative;
}

.verification-badge svg {
  width: 20px;
  height: 20px;
  color: inherit;
}

.verification-badge:hover,
.verification-badge:focus-visible {
  transform: translateY(-1px);
  box-shadow: var(--shadow-2);
}

.verification-badge--human {
  border-color: rgba(197, 138, 0, 0.5);
}

.question-actions--footer {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  align-items: center;
  width: 100%;
}

.question-actions .btn {
  white-space: nowrap;
}

.question-number {
  font-size: 1.6rem;
  font-weight: 600;
  margin: 0;
  color: var(--brand-dark);
}

.question-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 6px 12px;
  background: linear-gradient(120deg, rgba(10, 132, 255, 0.16), rgba(48, 213, 200, 0.16));
  color: var(--brand-dark);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tag--muted {
  background: rgba(15, 23, 42, 0.06);
  color: var(--muted);
}

.question-meta {
  color: var(--muted);
  font-size: 0.9rem;
  text-align: right;
}

.question-body {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin: 12px 0;
}

.question-text {
  font-size: 1.05rem;
  line-height: 1.6;
}

.question-labs {
  padding: 16px;
  border-radius: 14px;
  background: rgba(10, 132, 255, 0.06);
  border: 1px solid rgba(10, 132, 255, 0.12);
  font-size: 0.95rem;
}

.question-labs pre {
  margin: 10px 0 0 0;
  font-family: 'Courier New', Courier, monospace;
  white-space: pre-wrap;
}

.answers {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}

.answer-option {
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 14px;
  padding: 14px;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  cursor: pointer;
  
  background: rgba(255, 255, 255, 0.92);
  
}

.answer-option.has-stats {
  grid-template-columns: 44px 1fr auto;
  align-items: center;
}

.answer-option:hover {
  transform: translateY(-2px);
  border-color: rgba(10, 132, 255, 0.36);
  background: rgba(234, 241, 255, 0.9);
  
}

.answer-option.is-selected {
  border-color: rgba(10, 132, 255, 0.6);
  background: linear-gradient(160deg, rgba(10, 132, 255, 0.12), rgba(48, 213, 200, 0.08));
}

.answer-option.is-saved {
  
}

.answer-option.is-correct {
  border-color: rgba(52, 199, 89, 0.6);
  background: rgba(52, 199, 89, 0.12);
}

.answer-option.is-incorrect {
  border-color: rgba(255, 59, 48, 0.55);
  background: rgba(255, 59, 48, 0.1);
}

.answer-option.is-struck {
  text-decoration: line-through;
  opacity: 0.6;
}

.answer-option__label {
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.answer-option__text {
  line-height: 1.6;
}

.answer-option__stat {
  font-weight: 600;
  color: var(--muted);
  min-width: 68px;
  text-align: right;
  justify-self: end;
  font-variant-numeric: tabular-nums;
}

.answer-status {
  margin-top: 4px;
  min-height: 18px;
}

.explanation-card h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.explanation-card.is-hidden {
  display: none;
}

.feedback-section {
  margin-bottom: 14px;
  line-height: 1.5;
}

.comments-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 12px;
}

.comment {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  background: #fff;
}

.comment__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.comment__author {
  font-weight: 600;
  color: var(--text);
}

.comment__body {
  line-height: 1.5;
  color: var(--text);
}

.comments-empty {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  color: var(--text-secondary);
  background: #fff;
  text-align: center;
}

.comment-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.comment-form__label {
  font-weight: 600;
  color: var(--text);
}

.comment-form__actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.comment-form__status {
  font-size: 0.9rem;
}

.note-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  height: 100%;
}

.note-form textarea {
  flex: 1;
  min-height: 240px;
}

.highlight-token {
  
  background: yellow;
  padding: 0 2px;
  border-radius: 4px;
}

.practice-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 40px;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.9), rgba(234, 241, 255, 0.95));
  border-top: 1px solid rgba(10, 132, 255, 0.08);
  
  backdrop-filter: blur(10px);
}

.footer-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.practice-footer .footer-group:first-child {
  justify-content: flex-start;
  flex: 1;
}

.practice-footer .footer-group:nth-child(2) {
  justify-content: center;
}

.practice-footer .footer-group:last-child {
  justify-content: flex-end;
  flex: 1;
}

.footer-group--meta {
  justify-content: flex-end;
  flex: 1;
}

@media (max-width: 1024px) {
  .practice-layout {
    padding-left: 0;
    margin: 0 auto calc(var(--footer-height) + 64px);
    display: block;
  }

  .question-sidebar {
    position: static;
    width: 100%;
    max-height: none;
    min-height: 0;
    overflow: visible;
    margin: 0 0 24px 0;
  }
}

.account-forms {
  display: grid;
  gap: 28px;
}

.account-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.settings-support-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  
  gap: 24px;
  align-items: start;
}

@media (max-width: 900px) {
  .settings-support-grid {
    grid-template-columns: 1fr;
  }
}

.settings-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.settings-form h2 {
  margin: 0;
}

.donation-note {
  margin-top: 16px;
  padding: 16px 18px;
  border-radius: 14px;
  background: linear-gradient(120deg, rgba(10, 132, 255, 0.08), rgba(48, 213, 200, 0.08));
  border: 1px solid rgba(10, 132, 255, 0.2);
  color: var(--text);
  line-height: 1.5;
}

.donation-note a {
  color: var(--brand-dark);
  font-weight: 600;
}

.donation-note strong {
  color: var(--brand-dark);
}

.settings-form--danger {
  border: 1px solid rgba(255, 59, 48, 0.25);
  border-radius: 12px;
  padding: 20px;
  background: rgba(255, 59, 48, 0.08);
}

.danger-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.danger-actions form {
  margin: 0;
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px 120px 16px;
  }

  .practice-layout {
    gap: 16px;
  }

  .question-main {
    width: 100%;
  }

  .answers {
    gap: 10px;
  }

  .answer-option {
    grid-template-columns: 36px 1fr;
    padding: 12px;
  }

  .practice-footer {
    padding: 14px 16px;
  }

  .tab-header {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 6px;
    margin-bottom: 8px;
    gap: 10px;
  }

  .tab-header::-webkit-scrollbar {
    display: none;
  }

  .tab-header>* {
    flex-shrink: 0;
  }

  .question-validity {
    max-width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .question-validity::-webkit-scrollbar {
    display: none;
  }
}

.choice-stack {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.choice-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  transition: border 0.2s ease;
}

.choice-item input[type="radio"] {
  margin-top: 0.3rem;
}

.choice-item__title {
  font-weight: 600;
}

.choice-item__help {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

.choice-item:hover {
  border-color: var(--brand);
}

.practice-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.practice-meta__mode {
  font-weight: 600;
  background: rgba(10, 132, 255, 0.12);
  color: var(--brand-dark);
  border-radius: 999px;
  padding: 0.25rem 0.85rem;
}

.practice-meta__timer {
  font-family: monospace;
  font-weight: 600;
  padding: 0.25rem 0.85rem;
  border-radius: 999px;
  background: #0f172a;
  color: #f9fafb;
  display: flex;
  align-items: center;
  justify-content: center;
}

.practice-meta__timer--warning {
  background: #ff9f0a;
}

.practice-meta__timer--expired {
  background: #ff3b30;
}

.practice-meta__score {
  font-weight: 600;
  color: var(--brand);
}

.practice-meta__finish {
  margin-left: auto;
}

.answer-option.is-static {
  pointer-events: none;
}

.practice-history-card {
  margin-top: 24px;
}

.practice-history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.practice-history-table {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.practice-history-row {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.2fr) minmax(0, 1fr) minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(10, 132, 255, 0.1);
  
}

.practice-history-row--head {
  background: transparent;
  border: none;
  padding: 0 6px 6px 6px;
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.practice-history-row--head span {
  font-weight: 600;
}

.practice-history-name {
  font-weight: 600;
  color: var(--text);
}

.practice-history-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.dashboard-share {
  min-width: 240px;
}

.dashboard-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-start;
}

.dashboard-actions .btn {
  width: auto;
  padding: 0;
  font-weight: 600;
}

.share-field {
  margin: 0;
}

.share-field__label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #7a5b46;
  margin-bottom: 0.2rem;
}

.share-field__input,
.share-field__textarea {
  width: 100%;
  border: 1px solid rgba(10, 132, 255, 0.16);
  border-radius: 10px;
  padding: 0.5rem 0.6rem;
  font-size: 0.9rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.94);
}

.share-field__input {
  height: 2.25rem;
}

.share-field__textarea {
  resize: none;
  min-height: 3rem;
  word-break: break-word;
  white-space: pre-wrap;
}

@media (max-width: 768px) {
  .practice-history-row {
    grid-template-columns: 1fr 1fr;
    gap: 6px 12px;
  }

  .practice-history-row span:nth-child(3),
  .practice-history-row span:nth-child(4) {
    color: var(--muted);
  }

  .practice-history-row--head {
    display: none;
  }

  .practice-history-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 576px) {
  .practice-layout {
    gap: 12px;
  }

  .question-header,
  .practice-header {
    
  }

  .question-number {
    font-size: 1.2rem;
  }

  .tag {
    font-size: 0.7rem;
    padding: 3px 8px;
  }

  .answer-option {
    font-size: 0.95rem;
  }

  .practice-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    text-align: left;
  }
}

.settings-stack {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.input-group {
  display: flex;
  gap: 12px;
  align-items: center;
}

.input-group select {
  flex: 1;
  width: auto;
  
}

.input-group .btn {
  flex-shrink: 0;
}

.settings-form input,
.settings-form select {
  width: 100%;
}

.theme-options {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.theme-option {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-surface-alt);
  color: var(--text);
  min-width: 96px;
  justify-content: center;
  white-space: nowrap;
}

.theme-option input {
  width: 16px;
  height: 16px;
}

[data-theme="dark"] .theme-option {
  background: var(--bg-surface);
  border-color: var(--border);
}

.auth-body-new {
  background: radial-gradient(circle at 12% 20%, rgba(10, 132, 255, 0.1), transparent 24%),
    radial-gradient(circle at 82% 14%, rgba(48, 213, 200, 0.1), transparent 22%),
    var(--surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  color: var(--text);
  padding: 20px;
}

.auth-header {
  text-align: center;
  margin-bottom: 32px;
}

.auth-header h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.03em;
  color: var(--text);
}

.auth-header p {
  margin: 8px 0 0;
  font-size: 1.1rem;
  color: var(--muted);
  font-weight: 400;
  line-height: 1.5;
}

.auth-header a {
  color: var(--text);
  text-decoration: underline;
  font-weight: 500;
}

.auth-tabs {
  background: rgba(10, 132, 255, 0.1);
  padding: 4px;
  border-radius: var(--radius-lg);
  display: flex;
  width: 100%;
  max-width: 400px;
  margin-bottom: 24px;
}

.auth-tab {
  flex: 1;
  text-align: center;
  padding: 10px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: 600;
  color: var(--muted);
  transition: all 0.2s ease;
  user-select: none;
}

.auth-tab.active {
  background: #fff;
  color: #000;
  
}

.auth-card-new {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 400px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  
  color: var(--text);
  backdrop-filter: blur(10px);
}

.auth-card-new input[type="text"],
.auth-card-new input[type="email"],
.auth-card-new input[type="password"],
.auth-card-new select {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  
  padding: 12px;
  font-size: 1rem;
  width: 100%;
  box-sizing: border-box;
  margin-bottom: 16px;
  transition: all 0.2s;
  background-color: #f9fafb;
  
}

.auth-card-new input:focus,
.auth-card-new select:focus {
  outline: none;
  border-color: var(--brand-blue);
  background-color: #fff;
  
}

.btn-auth {
  width: 100%;
  padding: 12px;
  background-color: var(--brand);
  color: var(--text-on-brand);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-btn);
  
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
  margin-top: 8px;
}

.btn-auth:hover {
  background-color: var(--brand-hover);
  transform: translateY(-1px);
}

.form-section {
  display: none;
}

.form-section.active {
  display: block;
}

.form-group__hint {
  text-align: center;
  margin-top: 16px;
}

.form-group__hint a {
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: underline;
}

.form-group__hint a:hover {
  color: var(--text);
}

.auth-footer {
  margin-top: 24px;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--muted);
  text-align: center;
}

.auth-footer a {
  color: var(--text);
  text-decoration: underline;
  font-weight: 500;
}

.flash-messages {
  margin-bottom: 16px;
}

.flash-error {
  background: linear-gradient(120deg, rgba(255, 59, 48, 0.16), rgba(255, 159, 10, 0.12));
  border: 1px solid rgba(255, 59, 48, 0.22);
  color: #991b1b;
  padding: 10px;
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  font-size: 0.9rem;
}

.flash-success {
  background: linear-gradient(120deg, rgba(52, 199, 89, 0.14), rgba(52, 199, 89, 0.08));
  border: 1px solid rgba(52, 199, 89, 0.25);
  color: #065f46;
  padding: 10px;
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  font-size: 0.9rem;
}

.amount-bubbles {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.amount-bubble-input {
  display: none;
}

.amount-bubble-label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 56px;
  height: 44px;
  padding: 0 12px;
  border-radius: var(--radius-btn);
  background: white;
  border: 2px solid rgba(10, 132, 255, 0.15);
  cursor: pointer;
  font-weight: 700;
  color: var(--text);
  transition: all 0.2s ease;
  
}

.amount-bubble-input:checked+.amount-bubble-label {
  background: var(--brand);
  color: white;
  border-color: var(--brand);
  transform: scale(1.1);
  
}

.amount-bubble-label:hover {
  border-color: var(--brand);
  transform: translateY(-2px);
}

.amount-bubble-custom {
  min-width: 84px;
  max-width: 104px;
  border-radius: var(--radius-btn);
  padding: 0 10px;
  flex: 0 1 92px;
}

.amount-bubble-custom:hover {
  border-color: var(--brand);
}

.amount-bubble-custom input {
  border: none;
  background: transparent;
  width: 100%;
  min-width: 0;
  height: 100%;
  text-align: center;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  outline: none;
  padding: 0;
}

.amount-bubble-custom input:focus {
  
  transform: none;
}

.amount-bubble-custom:focus-within {
  border-color: var(--brand);
  
}

.pdf-upload-row {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.pdf-upload-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pdf-upload-col--main {
  flex: 0 0 70%;
}

@media (max-width: 640px) {
  .pdf-upload-row {
    flex-direction: column;
  }

  .pdf-upload-col--main {
    flex: 1 1 100%;
  }
}

.labs-toggle {
  border-color: rgba(10, 132, 255, 0.18);
  background: rgba(10, 132, 255, 0.08);
  
}

.labs-panel {
  position: fixed;
  top: calc(var(--header-height) + 16px);
  right: max(16px, calc((100vw - 1100px) / 2));
  width: 600px;
  max-width: calc(100vw - 32px);
  height: calc(100vh - var(--header-height) - var(--footer-height) - 60px);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(234, 241, 255, 0.94));
  border: 1px solid rgba(10, 132, 255, 0.12);
  border-radius: var(--radius-lg);
  
  padding: 18px;
  overflow: hidden;
  transform: translateX(120%);
  opacity: 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
  z-index: 24;
  display: flex;
  flex-direction: column;
  pointer-events: none;
}

.labs-panel.is-open {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}

.labs-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 22;
}

.labs-overlay.is-active {
  opacity: 1;
  pointer-events: auto;
}

.labs-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.labs-panel__eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  color: var(--muted);
}

.labs-panel__title {
  margin: 2px 0 4px 0;
}

.labs-panel__hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.labs-panel__controls {
  margin-bottom: 10px;
}

.labs-panel__controls input[type="search"] {
  width: 100%;
  
  border-color: rgba(10, 132, 255, 0.16);
}

.labs-panel__content {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-right: 4px;
  margin-top: 4px;
}

.labs-panel__empty {
  padding: 12px;
  border-radius: 12px;
  background: rgba(10, 132, 255, 0.06);
  border: 1px solid rgba(10, 132, 255, 0.12);
  color: var(--muted);
}

.labs-section {
  border: 1px solid rgba(10, 132, 255, 0.12);
  border-radius: 14px;
  padding: 12px;
  background: rgba(10, 132, 255, 0.03);
}

.labs-section__title {
  font-weight: 700;
  color: var(--brand-dark);
  margin-bottom: 8px;
}

.labs-group+.labs-group {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed rgba(10, 132, 255, 0.16);
}

.labs-group__title {
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
}

.labs-table {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.labs-row {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(15, 23, 42, 0.06);
  background: #fff;
  
  align-items: center;
}

.labs-row--head {
  background: rgba(10, 132, 255, 0.08);
  border-color: rgba(10, 132, 255, 0.2);
  
  font-weight: 700;
}

.labs-row__name {
  font-weight: 600;
  color: var(--text);
}

.labs-row__range {
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

.labs-row__range--si {
  color: var(--muted);
}

@media (max-width: 1024px) {
  .labs-panel {
    right: 12px;
    left: 12px;
    width: auto;
    transform: translateY(18px) scale(0.98);
    height: calc(100vh - var(--header-height) - 36px);
  }

  .labs-panel.is-open {
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 640px) {
  .labs-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .labs-row__range {
    font-size: 0.95rem;
  }

  .labs-panel {
    padding: 16px;
  }
}

.auth-title-section {
  text-align: center;
  margin-bottom: 24px;
}

.auth-title-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #111827;
  margin-bottom: 8px;
}

.auth-title-section p {
  color: #6b7280;
}

.auth-footer-text {
  text-align: center;
  margin-top: 16px;
}

.marketing-body {
  background-color: var(--bg-surface);
}

.marketing-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 32px;
  max-width: 1200px;
  margin: 0 auto;
}

.marketing-nav__logo {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.marketing-nav__logo::after {
  content: '.';
  color: var(--brand);
  position: relative;
  top: -4px;
  font-size: 2rem;
  line-height: 0;
}

.marketing-hero__content {
  max-width: 960px;
  margin: 0 auto;
}

.marketing-hero__brand {
  display: inline-block;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 18px;
  color: var(--text-secondary);
}

.marketing-main {
  max-width: 1100px;
  margin: -48px auto 0;
  padding: 0 24px 96px;
}

.marketing-callout {
  margin: 20px 0 28px;
  padding: 20px 22px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(234, 241, 255, 0.8));
  color: var(--text);
}

.marketing-callout h2 {
  margin: 0 0 10px;
  font-size: 1.4rem;
  color: var(--text);
}

.marketing-callout p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.6;
}

.marketing-hero {
  text-align: center;
  padding: 80px 24px 60px;
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-surface-warm) 100%);
  overflow: hidden;
}

.marketing-hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin: 0 auto 24px;
  max-width: 800px;
  color: var(--text);
}

.marketing-hero p {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
}

.marketing-hero__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 64px;
}

.marketing-hero__actions .btn {
  height: 52px;
  padding: 0 32px;
  font-size: 1.05rem;
}

.marketing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.marketing-grid--two {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.marketing-card {
  background: var(--bg-surface);
  border-radius: 14px;
  padding: 20px 22px;
  border: 1px solid rgba(10, 132, 255, 0.16);
}

.marketing-card h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.marketing-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.marketing-list {
  margin: 24px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.7;
}

.marketing-cta {
  margin-top: 32px;
  background: linear-gradient(135deg, #0a84ff 0%, #5ed8ff 45%, #30d5c8 100%);
  border-radius: 20px;
  padding: 36px 32px;
  color: #fff;
}

.marketing-cta__content {
  max-width: 720px;
}

.marketing-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.marketing-visual {
  max-width: 1000px;
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
  
  background: #fff;
  position: relative;
}

.marketing-visual img {
  width: 100%;
  height: auto;
  display: block;
}

.marketing-section {
  padding: 80px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.marketing-section--alt {
  background-color: var(--bg-surface-alt);
  border-radius: 32px;
  margin-top: 40px;
  margin-bottom: 40px;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.features-scroll-container {
  overflow-x: auto;
  padding-bottom: 20px;
  
  -webkit-overflow-scrolling: touch;
  margin: 0 -24px;
  
  padding: 0 0 20px 24px;
}

.grid-features {
  display: flex;
  gap: 24px;
  min-width: max-content;
  padding-right: 24px;
}

.feature-card {
  padding: 32px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  
  width: 300px;
  
  flex-shrink: 0;
}

.feature-card:hover {
  transform: translateY(-4px);
  
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-top: 0;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background-color: var(--bg-surface-warm);
  color: var(--brand-warning-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.feature-card--highlight {
  border: 2px solid var(--brand);
  background: linear-gradient(135deg, rgba(255, 183, 77, 0.08), var(--bg-surface));
  box-shadow: 0 4px 20px -4px rgba(255, 183, 77, 0.2);
}

.feature-badge {
  background: linear-gradient(135deg, #22c55e, #10b981);
  color: #fff;
  font-size: 0.65rem;
  padding: 2px 8px;
  border-radius: 99px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.grid-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.grid-split--reverse {
  direction: rtl;
}

.grid-split--reverse>* {
  direction: ltr;
}

.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  
  border: 1px solid var(--border);
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
}

.demo-box {
  background-color: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 24px;
  display: inline-block;
  text-align: left;
}

.demo-credentials {
  font-family: monospace;
  background: var(--bg-surface-alt);
  padding: 12px;
  border-radius: 8px;
  margin: 12px 0;
  display: block;
}

.marketing-footer {
  padding: 40px 24px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
  margin-top: 80px;
}

.coming-soon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.coming-soon-card {
  background: linear-gradient(135deg, var(--bg-surface-warm), #fff);
  border: 1px dashed var(--brand);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: left;
}

.coming-soon-card h4 {
  margin: 0 0 8px 0;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.coming-soon-badge {
  background: var(--brand);
  color: var(--text-on-brand);
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 99px;
  text-transform: uppercase;
  font-weight: 700;
}

.coming-soon-card--featured {
  border-style: solid;
  border-color: var(--brand);
  background: linear-gradient(135deg, rgba(255, 183, 77, 0.12), rgba(255, 138, 91, 0.08));
  box-shadow: 0 4px 20px -4px rgba(255, 183, 77, 0.25);
}

.coming-soon-badge--new {
  background: linear-gradient(135deg, #22c55e, #10b981);
  color: #fff;
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {

  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4);
  }

  50% {
    box-shadow: 0 0 8px 2px rgba(34, 197, 94, 0.3);
  }
}

@media (max-width: 768px) {
  .marketing-hero h1 {
    font-size: 2.5rem;
  }

  .grid-split {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .marketing-nav {
    padding: 16px 24px;
  }
}

.qa-modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 1400;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.qa-modal__dialog {
  position: relative;
  background: var(--surface, #fff);
  border-radius: var(--radius-lg);
  padding: 22px 22px 18px;
  width: min(520px, 100%);
  box-shadow: var(--shadow-2);
  border: 1px solid var(--border);
}

.qa-modal__title {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 1.3rem;
}

.qa-modal__hint {
  margin: 0 0 12px;
  color: var(--text-secondary);
}

.qa-modal__close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(0, 0, 0, 0.05);
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 1.2rem;
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.qa-modal__close:hover {
  background: rgba(0, 0, 0, 0.08);
  transform: scale(1.05);
}

.qa-form {
  display: grid;
  gap: 12px;
  margin-top: 6px;
}

.qa-form__status {
  min-height: 20px;
  font-size: 0.9rem;
  color: var(--muted, #6b7280);
}

.qa-form__actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 4px;
}

@media (max-width: 640px) {
  .qa-modal {
    align-items: flex-start;
    padding: 12px;
  }

  .qa-modal__dialog {
    padding: 18px;
  }
}

.deep-learn-modal {
  position: fixed;
  inset: 0;
  background: rgba(17, 24, 39, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 1400;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.deep-learn-modal__dialog {
  position: relative;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px 28px 24px;
  max-width: 960px;
  width: min(960px, 100%);
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  overscroll-behavior: contain;
  box-shadow: 0 25px 60px -20px rgba(0, 0, 0, 0.25), 0 10px 30px -16px rgba(0, 0, 0, 0.18);
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.deep-learn-modal__close {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(0, 0, 0, 0.04);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.4rem;
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.deep-learn-modal__close:hover {
  background: rgba(0, 0, 0, 0.08);
  transform: scale(1.05);
}

.deep-learn-modal__eyebrow {
  margin: 0 0 8px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.deep-learn-mark {
  background: linear-gradient(120deg, #3b82f6, #fb7185, #ffb347);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 800;
}

.deep-learn-modal h3 {
  margin: 0 0 12px;
  color: var(--text);
  font-size: 1.7rem;
}

.deep-learn-modal__copy {
  margin: 0 0 14px;
  color: var(--text-secondary);
  font-size: 1rem;
}

.deep-learn-modal__list {
  margin: 0 0 18px;
  padding-left: 18px;
  color: var(--text);
  display: grid;
  gap: 6px;
}

.deep-learn-modal__image {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-surface-alt);
}

.deep-learn-modal__image img {
  width: 100%;
  display: block;
}

@media (max-width: 720px) {
  .deep-learn-modal {
    padding: 12px;
    align-items: flex-start;
  }

  .deep-learn-modal__dialog {
    padding: 22px 18px 18px;
    max-height: calc(100vh - 24px);
  }

  .deep-learn-modal h3 {
    font-size: 1.45rem;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-app: #0b1220;
    --bg-surface: #0f172a;
    --bg-surface-alt: #16233c;
    --bg-surface-warm: #1a2334;
    --surface: var(--bg-surface);
    --surface-alt: var(--bg-surface-alt);
    --text: #e5e7eb;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-disabled: #64748b;
    --muted: #94a3b8;
    --brand-dark: #0b1220;
    --text-on-brand: #0b1220;
    --border: #243047;
    --shadow-1: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
    --shadow-2: 0 10px 30px -16px rgba(0, 0, 0, 0.6), 0 6px 18px -12px rgba(0, 0, 0, 0.55);
  }

  body {
    background-color: var(--bg-app);
    color: var(--text-secondary);
    color-scheme: dark;
  }

  .site-header {
    background-color: var(--bg-surface);
    border-color: var(--border);
  }

  .site-header__brand {
    color: var(--text);
  }

  .site-header__nav a {
    color: var(--text-secondary);
  }

  .site-header__nav a:hover,
  .site-header__nav a.active {
    color: var(--text);
    background-color: rgba(59, 130, 246, 0.18);
  }

  .site-header__toggle {
    border-color: var(--border);
  }

  .site-header__toggle span {
    background: var(--text);
  }

  .card,
  .review-panel,
  .question-main .card,
  .practice-footer,
  .labs-panel,
  .deep-learn-modal__dialog,
  .marketing-visual {
    background-color: var(--bg-surface);
    border-color: var(--border);
    color: var(--text);
  }

  .card--subdued,
  .builder-column,
  .builder-collapse,
  .question-sidebar,
  .marketing-section--alt {
    background: var(--bg-surface-alt);
    border-color: var(--border);
  }

  .marketing-section {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.94), rgba(13, 20, 34, 0.98));
    border: 1px solid var(--border);
  }

  .marketing-section--alt {
    background: linear-gradient(160deg, rgba(22, 35, 60, 0.9), rgba(15, 23, 42, 0.92));
    border: 1px solid var(--border);
  }

  .section-header h2 {
    color: var(--text);
  }

  .section-header p {
    color: var(--text-secondary);
  }

  .builder-collapse::after {
    background: rgba(148, 163, 184, 0.2);
  }

  input[type="text"],
  input[type="number"],
  input[type="email"],
  input[type="password"],
  select,
  textarea {
    background-color: var(--bg-surface);
    color: var(--text);
    border-color: var(--border);
  }

  .input-shell {
    background-color: var(--bg-surface);
    border-color: var(--border);
  }

  .input-shell::after {
    border-top-color: var(--text-muted);
  }

  input::placeholder,
  textarea::placeholder {
    color: var(--muted);
  }

  .amount-bubble-label {
    background: var(--bg-surface-alt);
    border-color: var(--border);
    color: var(--text);
  }

  .amount-bubble-input:checked+.amount-bubble-label {
    background: var(--brand);
    color: var(--brand-dark);
    border-color: var(--brand);
    box-shadow: 0 0 0 2px rgba(255, 229, 180, 0.22);
  }

  .amount-bubble-custom input {
    color: var(--text);
  }

  .btn {
    color: var(--text);
  }

  .btn:hover {
    background-color: rgba(255, 255, 255, 0.05);
  }

  .btn--ghost {
    background-color: rgba(255, 255, 255, 0.06);
    border-color: var(--border);
    color: var(--text);
  }

  .btn--primary {
    color: #0b1220;
  }

  .lesson-list__item {
    background: var(--bg-surface-alt);
    color: var(--text);
    box-shadow: none;
  }

  .lesson-content {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.9));
    color: var(--text);
  }

  .lesson-html p {
    color: var(--text-secondary);
  }

  .checkbox-item {
    background: var(--bg-surface-alt);
    border-color: var(--border);
    color: var(--text);
  }

  .checkbox-item:hover {
    background: rgba(59, 130, 246, 0.14);
    border-color: rgba(59, 130, 246, 0.35);
  }

  .answer-option,
  .choice-item {
    background: var(--bg-surface);
    border-color: var(--border);
    color: var(--text);
  }

  .answer-option:hover,
  .choice-item:hover {
    background: rgba(59, 130, 246, 0.12);
    border-color: rgba(59, 130, 246, 0.45);
  }

  .answer-option.is-selected {
    border-color: rgba(59, 130, 246, 0.55);
    background: linear-gradient(160deg, rgba(59, 130, 246, 0.18), rgba(48, 213, 200, 0.16));
  }

  .answer-option.is-correct {
    background: rgba(34, 197, 94, 0.14);
  }

  .answer-option.is-incorrect {
    background: rgba(248, 113, 113, 0.14);
  }

  .flash {
    border-color: transparent;
  }

  .flash--success {
    background-color: rgba(34, 197, 94, 0.14);
    color: #bbf7d0;
  }

  .flash--error {
    background-color: rgba(248, 113, 113, 0.16);
    color: #fecdd3;
  }

  .flash--info {
    background-color: rgba(59, 130, 246, 0.16);
    color: #bfdbfe;
  }

  .flash--warning {
    background-color: rgba(251, 191, 36, 0.18);
    color: #fde68a;
  }

  .comment,
  .comments-empty,
  .comment-form,
  .choice-item,
  .auth-tab.active,
  .auth-card-new,
  .labs-row,
  .labs-row--head {
    background-color: var(--bg-surface);
    color: var(--text);
  }

  .comment,
  .comments-empty,
  .comment-form,
  .choice-item,
  .labs-row {
    border-color: var(--border);
  }

  .auth-tab.active {
    border: 1px solid var(--border);
  }

  .auth-card-new {
    border-color: var(--border);
    background: rgba(15, 23, 42, 0.9);
  }

  .auth-card-new input[type="text"],
  .auth-card-new input[type="email"],
  .auth-card-new input[type="password"],
  .auth-card-new select {
    background-color: var(--bg-surface-alt);
    border-color: var(--border);
    color: var(--text);
  }

  .choice-item:hover {
    border-color: var(--brand);
  }

  .sidebar-btn.is-correct {
    border-color: rgba(34, 197, 94, 0.45);
    background: rgba(34, 197, 94, 0.16);
  }

  .sidebar-btn.is-incorrect {
    border-color: rgba(248, 113, 113, 0.45);
    background: rgba(248, 113, 113, 0.16);
  }

  .tab-btn {
    background: var(--bg-surface);
    color: var(--text-secondary);
  }

  .tab-btn.is-active {
    color: var(--text-on-brand);
  }

  .btn--deep-learn,
  .btn--deep-learn:hover {
    background: linear-gradient(var(--bg-surface), var(--bg-surface)) padding-box,
      linear-gradient(120deg, #3b82f6, #fb7185, #ffb347) border-box;
    color: var(--text);
    box-shadow: 0 12px 30px -18px rgba(0, 0, 0, 0.6);
  }

  .explanation-card--deep-active {
    background: linear-gradient(var(--bg-surface), var(--bg-surface)) padding-box,
      linear-gradient(120deg, #3b82f6, #fb7185, #ffb347) border-box;
    box-shadow: 0 12px 30px -18px rgba(0, 0, 0, 0.6);
  }

  .explanation-card--deep-active:hover {
    background: linear-gradient(var(--bg-surface), var(--bg-surface)) padding-box,
      linear-gradient(120deg, #3b82f6, #fb7185, #ffb347) border-box;
  }

  .question-labs {
    background: rgba(59, 130, 246, 0.12);
    border-color: rgba(59, 130, 246, 0.25);
  }

  .practice-meta__mode {
    background: rgba(59, 130, 246, 0.16);
    color: var(--text);
  }

  .question-number {
    color: var(--text);
  }

  .question-nav {
    color: var(--text);
    font-weight: 600;
    background: transparent;
    border-color: rgba(148, 163, 184, 0.35);
  }

  .question-nav:hover,
  .question-nav.is-active {
    background: linear-gradient(145deg, rgba(59, 130, 246, 0.18), rgba(48, 213, 200, 0.1));
    color: var(--text);
  }

  .question-nav.is-correct {
    color: var(--text);
  }

  .question-nav.is-incorrect {
    color: var(--text);
  }

  .question-nav.is-correct:hover,
  .question-nav.is-correct.is-active {
    color: var(--text);
  }

  .question-nav.is-incorrect:hover,
  .question-nav.is-incorrect.is-active {
    color: var(--text);
  }

  
  .question-nav.is-correct,
  .question-nav.is-correct:hover,
  .question-nav.is-correct.is-active {
    background: transparent;
    border-color: rgba(34, 197, 94, 0.8);
  }

  .question-nav.is-incorrect,
  .question-nav.is-incorrect:hover,
  .question-nav.is-incorrect.is-active {
    background: transparent;
    border-color: rgba(248, 113, 113, 0.85);
  }

  .share-field__label {
    color: var(--text-secondary);
  }

  .share-field__input,
  .share-field__textarea {
    background: var(--bg-surface);
    border-color: var(--border);
    color: var(--text);
  }

  .tag {
    color: var(--text);
  }

  .tag--muted {
    background: rgba(148, 163, 184, 0.12);
  }

  .highlight {
    background: rgba(255, 214, 102, 0.3);
    color: var(--brand-dark);
  }

  .highlight-token {
    background: rgba(255, 214, 102, 0.42);
    color: var(--brand-dark);
  }

  .filter-pill--active {
    background-color: rgba(59, 130, 246, 0.16);
    color: var(--text);
    border-color: rgba(59, 130, 246, 0.35);
  }

  .labs-row--head {
    background: rgba(59, 130, 246, 0.12);
    border-color: rgba(59, 130, 246, 0.35);
  }

  .practice-footer {
    background: linear-gradient(120deg, rgba(15, 23, 42, 0.9), rgba(17, 24, 39, 0.94));
    border-top: 1px solid rgba(148, 163, 184, 0.25);
  }

  .site-footer {
    color: var(--text-muted);
  }

  .demo-box {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    color: var(--text);
  }

}

/* Manual theme overrides */
:root[data-theme="dark"] {
  --bg-app: #0b1220;
  --bg-surface: #0f172a;
  --bg-surface-alt: #16233c;
  --bg-surface-warm: #1a2334;
  --surface: var(--bg-surface);
  --surface-alt: var(--bg-surface-alt);
  --text: #e5e7eb;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-disabled: #64748b;
  --muted: #94a3b8;
  --brand-dark: #0b1220;
  --text-on-brand: #0b1220;
  --border: #243047;
  --shadow-1: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
  --shadow-2: 0 10px 30px -16px rgba(0, 0, 0, 0.6), 0 6px 18px -12px rgba(0, 0, 0, 0.55);
}

body[data-theme="dark"],
:root[data-theme="dark"] body {
  background-color: var(--bg-app);
  color: var(--text-secondary);
  color-scheme: dark;
}

[data-theme="dark"] .site-header {
  background-color: var(--bg-surface);
  border-color: var(--border);
}

[data-theme="dark"] .site-header__brand {
  color: var(--text);
}

[data-theme="dark"] .site-header__nav a {
  color: var(--text-secondary);
}

[data-theme="dark"] .site-header__nav a:hover,
[data-theme="dark"] .site-header__nav a.active {
  color: var(--text);
  background-color: rgba(59, 130, 246, 0.18);
}

[data-theme="dark"] .site-header__toggle {
  border-color: var(--border);
}

[data-theme="dark"] .site-header__toggle span {
  background: var(--text);
}

[data-theme="dark"] .card,
[data-theme="dark"] .review-panel,
[data-theme="dark"] .question-main .card,
[data-theme="dark"] .practice-footer,
[data-theme="dark"] .labs-panel,
[data-theme="dark"] .deep-learn-modal__dialog,
[data-theme="dark"] .marketing-visual {
  background-color: var(--bg-surface);
  border-color: var(--border);
  color: var(--text);
}

[data-theme="dark"] .card--subdued,
[data-theme="dark"] .builder-column,
[data-theme="dark"] .builder-collapse,
[data-theme="dark"] .question-sidebar,
[data-theme="dark"] .marketing-section--alt {
  background: var(--bg-surface-alt);
  border-color: var(--border);
}

[data-theme="dark"] .marketing-section {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.94), rgba(13, 20, 34, 0.98));
  border: 1px solid var(--border);
}

[data-theme="dark"] .marketing-section--alt {
  background: linear-gradient(160deg, rgba(22, 35, 60, 0.9), rgba(15, 23, 42, 0.92));
  border: 1px solid var(--border);
}

[data-theme="dark"] .section-header h2 {
  color: var(--text);
}

[data-theme="dark"] .section-header p {
  color: var(--text-secondary);
}

[data-theme="dark"] .builder-collapse::after {
  background: rgba(148, 163, 184, 0.2);
}

[data-theme="dark"] input[type="text"],
[data-theme="dark"] input[type="number"],
[data-theme="dark"] input[type="email"],
[data-theme="dark"] input[type="password"],
[data-theme="dark"] select,
[data-theme="dark"] textarea {
  background-color: var(--bg-surface);
  color: var(--text);
  border-color: var(--border);
}

[data-theme="dark"] .input-shell {
  background-color: var(--bg-surface);
  border-color: var(--border);
}

[data-theme="dark"] .input-shell::after {
  border-top-color: var(--text-muted);
}

[data-theme="dark"] input::placeholder,
[data-theme="dark"] textarea::placeholder {
  color: var(--muted);
}

[data-theme="dark"] .amount-bubble-label {
  background: var(--bg-surface-alt);
  border-color: var(--border);
  color: var(--text);
}

[data-theme="dark"] .amount-bubble-input:checked+.amount-bubble-label {
  background: var(--brand);
  color: var(--brand-dark);
  border-color: var(--brand);
  box-shadow: 0 0 0 2px rgba(255, 229, 180, 0.22);
}

[data-theme="dark"] .amount-bubble-custom input {
  color: var(--text);
}

[data-theme="dark"] .btn {
  color: var(--text);
}

[data-theme="dark"] .btn:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .btn--ghost {
  background-color: rgba(255, 255, 255, 0.06);
  border-color: var(--border);
  color: var(--text);
}

[data-theme="dark"] .btn--primary {
  color: #0b1220;
}

[data-theme="dark"] .lesson-list__item {
  background: var(--bg-surface-alt);
  color: var(--text);
  box-shadow: none;
}

[data-theme="dark"] .lesson-content {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.9));
  color: var(--text);
}

[data-theme="dark"] .lesson-html p {
  color: var(--text-secondary);
}

[data-theme="dark"] .checkbox-item {
  background: var(--bg-surface-alt);
  border-color: var(--border);
  color: var(--text);
}

[data-theme="dark"] .checkbox-item:hover {
  background: rgba(59, 130, 246, 0.14);
  border-color: rgba(59, 130, 246, 0.35);
}

[data-theme="dark"] .answer-option,
[data-theme="dark"] .choice-item {
  background: var(--bg-surface);
  border-color: var(--border);
  color: var(--text);
}

[data-theme="dark"] .answer-option:hover,
[data-theme="dark"] .choice-item:hover {
  background: rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.45);
}

[data-theme="dark"] .answer-option.is-selected {
  border-color: rgba(59, 130, 246, 0.55);
  background: linear-gradient(160deg, rgba(59, 130, 246, 0.18), rgba(48, 213, 200, 0.16));
}

[data-theme="dark"] .answer-option.is-correct {
  background: rgba(34, 197, 94, 0.14);
}

[data-theme="dark"] .answer-option.is-incorrect {
  background: rgba(248, 113, 113, 0.14);
}

[data-theme="dark"] .flash {
  border-color: transparent;
}

[data-theme="dark"] .flash--success {
  background-color: rgba(34, 197, 94, 0.14);
  color: #bbf7d0;
}

[data-theme="dark"] .flash--error {
  background-color: rgba(248, 113, 113, 0.16);
  color: #fecdd3;
}

[data-theme="dark"] .flash--info {
  background-color: rgba(59, 130, 246, 0.16);
  color: #bfdbfe;
}

[data-theme="dark"] .flash--warning {
  background-color: rgba(251, 191, 36, 0.18);
  color: #fde68a;
}

[data-theme="dark"] .comment,
[data-theme="dark"] .comments-empty,
[data-theme="dark"] .comment-form,
[data-theme="dark"] .choice-item,
[data-theme="dark"] .auth-tab.active,
[data-theme="dark"] .auth-card-new,
[data-theme="dark"] .labs-row,
[data-theme="dark"] .labs-row--head {
  background-color: var(--bg-surface);
  color: var(--text);
}

[data-theme="dark"] .comment,
[data-theme="dark"] .comments-empty,
[data-theme="dark"] .comment-form,
[data-theme="dark"] .choice-item,
[data-theme="dark"] .labs-row {
  border-color: var(--border);
}

[data-theme="dark"] .auth-tab.active {
  border: 1px solid var(--border);
}

[data-theme="dark"] .auth-card-new {
  border-color: var(--border);
  background: rgba(15, 23, 42, 0.9);
}

[data-theme="dark"] .auth-card-new input[type="text"],
[data-theme="dark"] .auth-card-new input[type="email"],
[data-theme="dark"] .auth-card-new input[type="password"],
[data-theme="dark"] .auth-card-new select {
  background-color: var(--bg-surface-alt);
  border-color: var(--border);
  color: var(--text);
}

[data-theme="dark"] .choice-item:hover {
  border-color: var(--brand);
}

[data-theme="dark"] .sidebar-btn.is-correct {
  border-color: rgba(34, 197, 94, 0.45);
  background: rgba(34, 197, 94, 0.16);
}

[data-theme="dark"] .sidebar-btn.is-incorrect {
  border-color: rgba(248, 113, 113, 0.45);
  background: rgba(248, 113, 113, 0.16);
}

[data-theme="dark"] .tab-btn {
  background: var(--bg-surface);
  color: var(--text-secondary);
}

[data-theme="dark"] .tab-btn.is-active {
  color: var(--text-on-brand);
}

[data-theme="dark"] .btn--deep-learn,
[data-theme="dark"] .btn--deep-learn:hover {
  background: linear-gradient(var(--bg-surface), var(--bg-surface)) padding-box,
    linear-gradient(120deg, #3b82f6, #fb7185, #ffb347) border-box;
  color: var(--text);
  box-shadow: 0 12px 30px -18px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .explanation-card--deep-active {
  background: linear-gradient(var(--bg-surface), var(--bg-surface)) padding-box,
    linear-gradient(120deg, #3b82f6, #fb7185, #ffb347) border-box;
  box-shadow: 0 12px 30px -18px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .explanation-card--deep-active:hover {
  background: linear-gradient(var(--bg-surface), var(--bg-surface)) padding-box,
    linear-gradient(120deg, #3b82f6, #fb7185, #ffb347) border-box;
}

[data-theme="dark"] .question-labs {
  background: rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.25);
}

[data-theme="dark"] .practice-meta__mode {
  background: rgba(59, 130, 246, 0.16);
  color: var(--text);
}

[data-theme="dark"] .question-number {
  color: var(--text);
}

[data-theme="dark"] .question-nav {
  color: var(--text);
  font-weight: 600;
  background: transparent;
  border-color: rgba(148, 163, 184, 0.35);
}

[data-theme="dark"] .question-nav:hover,
[data-theme="dark"] .question-nav.is-active {
  background: linear-gradient(145deg, rgba(59, 130, 246, 0.18), rgba(48, 213, 200, 0.1));
  color: var(--text);
}

[data-theme="dark"] .question-nav.is-correct {
  color: var(--text);
}

[data-theme="dark"] .question-nav.is-incorrect {
  color: var(--text);
}

[data-theme="dark"] .question-nav.is-correct:hover,
[data-theme="dark"] .question-nav.is-correct.is-active {
  color: var(--text);
}

[data-theme="dark"] .question-nav.is-incorrect:hover,
[data-theme="dark"] .question-nav.is-incorrect.is-active {
  color: var(--text);
}

[data-theme="dark"] .question-nav.is-correct,
[data-theme="dark"] .question-nav.is-correct:hover,
[data-theme="dark"] .question-nav.is-correct.is-active {
  background: transparent;
  border-color: rgba(34, 197, 94, 0.8);
}

[data-theme="dark"] .question-nav.is-incorrect,
[data-theme="dark"] .question-nav.is-incorrect:hover,
[data-theme="dark"] .question-nav.is-incorrect.is-active {
  background: transparent;
  border-color: rgba(248, 113, 113, 0.85);
}

[data-theme="dark"] .share-field__label {
  color: var(--text-secondary);
}

[data-theme="dark"] .share-field__input,
[data-theme="dark"] .share-field__textarea {
  background: var(--bg-surface);
  border-color: var(--border);
  color: var(--text);
}

[data-theme="dark"] .tag {
  color: var(--text);
}

:root[data-theme="light"] {
  color-scheme: light;
}

body[data-theme="light"],
:root[data-theme="light"] body {
  color-scheme: light;
  background-color: var(--bg-app);
  color: var(--text-secondary);
}

.demo-credentials {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border);
  color: var(--text);
}

.policy-body {
  background: var(--bg-surface);
  color: var(--text);
}

.policy-wrapper {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 24px 96px;
}

.policy-hero {
  margin-bottom: 20px;
}

.policy-kicker {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 6px;
}

.policy-hero h1 {
  margin: 0 0 8px;
  font-size: 2.5rem;
}

.policy-hero p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.6;
}

.policy-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-1);
}

.policy-card+.policy-card {
  margin-top: 16px;
}

.policy-section+.policy-section {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.policy-section h2 {
  margin: 0 0 10px;
  font-size: 1.2rem;
  color: var(--text);
}

.policy-section p {
  margin: 0 0 10px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.policy-section ul {
  margin: 12px 0;
  padding-left: 20px;
  color: var(--text-secondary);
}

.policy-section li {
  margin-bottom: 8px;
  line-height: 1.6;
}

.policy-footer {
  text-align: center;
  margin-top: 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.legal-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.legal-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text);
}

.legal-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.legal-content p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.legal-content ul {
  margin-bottom: 1rem;
  padding-left: 2rem;
  color: var(--text-secondary);
}

.legal-content li {
  margin-bottom: 0.5rem;
}

.legal-content strong {
  color: var(--text);
}

.admin-console {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.admin-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-start;
}

.admin-actions form {
  margin: 0;
  width: 100%;
}

.admin-actions .btn {
  width: 100%;
  justify-content: center;
}

.admin-console__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.admin-console__frame {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-surface);
  box-shadow: var(--shadow-1);
  min-height: 70vh;
}

.admin-console__frame iframe {
  width: 100%;
  min-height: 70vh;
  border: 0;
  background: #fff;
}

.admin-table-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.admin-table-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--bg-surface-alt);
  color: var(--text);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.practice-meta__timer {
  cursor: pointer;
  user-select: none;
  transition: opacity 0.2s;
}

.practice-meta__timer--paused {
  opacity: 0.7;
  font-style: italic;
}

.btn--secondary {
  background-color: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn--secondary:hover {
  background-color: var(--bg-surface-alt);
  border-color: var(--brand);
}

.analysis-form-group {
  margin-top: 16px;
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.analysis-form-inline {
  flex-direction: row;
  align-items: center;
  flex-wrap: nowrap;
}

@media (max-width: 600px) {
  .analysis-form-inline {
    flex-wrap: wrap;
  }
}

.analysis-input-shell {
  max-width: 200px;
  flex-shrink: 0;
}

.btn-upload-csv {
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

.analysis-file-name {
  margin-top: 8px;
  display: block;
}

.chart-container--wide {
  min-height: 300px;
}

.analysis-results-container {
  display: none;
}

.analysis-table-wrapper {
  margin-top: 16px;
}

.analysis-table-topic {
  
}

.analysis-incorrect-count {
  color: #ea5a6b;
  font-weight: bold;
}

.recommendation-textarea {
  background-color: var(--bg-surface-alt);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.recommendation-actions {
  margin-top: 8px;
}

.recommendation-status {
  margin-top: 8px;
  font-size: 0.9em;
}

.analysis-empty-message {
  text-align: center;
}

.learn-shell {
  margin: 32px auto 24px auto;
  max-width: none;
  width: 100%;
  
  padding: 0 24px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.learn-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.32fr) minmax(0, 1fr);
  gap: 16px;
  align-items: stretch;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.learn-tier-info {
  margin-bottom: 0.5rem;
}

@media (min-width: 901px) {
  .page-learn,
  .page-index,
  .page-dashboard,
  .page-settings,
  .page-nbme {
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
  }

  .page-learn .site-header,
  .page-index .site-header,
  .page-dashboard .site-header,
  .page-settings .site-header,
  .page-nbme .site-header {
    flex-shrink: 0;
  }

  .page-learn .site-footer,
  .page-index .site-footer,
  .page-dashboard .site-footer,
  .page-settings .site-footer,
  .page-nbme .site-footer {
    flex-shrink: 0;
  }

  .page-learn .learn-shell {
    flex: 1 1 auto;
    min-height: 0;
    
  }

  .page-learn .learn-grid {
    flex: 1 1 auto;
    min-height: 0;
  }

  .page-index .container,
  .page-dashboard .container,
  .page-settings .container,
  .page-nbme .container {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    margin-top: 32px;
    margin-bottom: 0;
  }
}

@media (max-width: 1100px) {
  .learn-grid {
    grid-template-columns: minmax(240px, 0.4fr) minmax(0, 1fr);
  }
}

@media (max-width: 900px) {
  .learn-grid {
    grid-template-columns: 1fr;
    height: auto;
    overflow: visible;
    flex: none;
  }

  .learn-shell {
    height: auto;
    overflow: visible;
    display: block;
  }

  .learn-sidebar {
    height: auto;
    overflow: visible;
  }

  .lesson-main {
    height: auto;
    overflow: visible;
  }
}

.learn-sidebar {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 0;
  overflow-y: auto;
  padding-right: 4px;
}

.lesson-list-card,
.learn-form-card {
  flex-shrink: 0;
}

.lesson-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.lesson-list__header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  margin-bottom: 10px;
}

.lesson-list__title-main {
  margin: 2px 0 0;
}

.lesson-list__hint {
  margin-top: 10px;
}

.lesson-list__item {
  width: 100%;
  text-align: left;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px;
  background: var(--bg-surface-alt);
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.12s ease;
}

.lesson-list__item:hover,
.lesson-list__item:focus-visible {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-2);
  transform: translateY(-1px);
}

.lesson-list__item.is-active {
  border-color: var(--accent-blue);
  box-shadow: 0 12px 30px -18px rgba(59, 130, 246, 0.35);
}

.lesson-list__title {
  font-weight: 700;
  color: var(--text);
}

.lesson-list__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
}

.lesson-subtitle {
  color: var(--text-muted, #6b7280);
  font-size: 0.9rem;
}

.lesson-error {
  color: #b91c1c;
  font-size: 0.9rem;
  margin-top: 6px;
}

.lesson-status {
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text);
}

.lesson-status--completed {
  background: rgba(34, 197, 94, 0.12);
  color: #16a34a;
  border-color: rgba(34, 197, 94, 0.4);
}

.lesson-status--processing,
.lesson-status--pending,
.lesson-status--queued {
  background: rgba(59, 130, 246, 0.12);
  color: #2563eb;
  border-color: rgba(59, 130, 246, 0.4);
}

.lesson-status--failed {
  background: rgba(239, 68, 68, 0.12);
  color: #b91c1c;
  border-color: rgba(185, 28, 28, 0.35);
}

.lesson-main {
  min-height: 0;
  width: 100%;
  overflow-y: auto;
}

.lesson-content {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  background: var(--bg-surface);
  color: var(--text);
  box-shadow: var(--shadow-2);
}

.lesson-podcast {
  margin-top: 24px;
}

.lesson-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.lesson-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.lesson-body {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.lesson-qid-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 8px 10px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-surface-alt);
  margin-top: 8px;
}

.lesson-qid-label {
  font-weight: 600;
  color: var(--text);
}

.lesson-qid-values {
  color: var(--text-secondary);
  font-family: monospace;
}

.lesson-html {
  color: var(--text);
}

.lesson-html h1,
.lesson-html h2,
.lesson-html h3,
.lesson-html h4 {
  color: var(--text);
}

.lesson-html p {
  color: var(--text-secondary);
}

.lesson-html table {
  width: 100%;
  border-collapse: collapse;
}

.lesson-html th,
.lesson-html td {
  border: 1px solid var(--border);
  padding: 6px 8px;
  text-align: left;
}

.lesson-html a {
  color: var(--accent-blue);
}

@media (max-width: 640px) {
  .page-learn {
    overflow-x: hidden;
  }

  .learn-shell {
    padding-left: 12px;
    padding-right: 12px;
    margin-top: 4px;
    height: auto;
    overflow: visible;
    max-width: 100%;
    width: 100%;
  }

  .learn-grid {
    gap: 12px;
    height: auto;
    max-width: 100%;
    width: 100%;
    overflow: visible;
  }

  .learn-sidebar {
    height: auto;
    overflow: visible;
    padding-right: 0;
    max-width: 100%;
  }

  .learn-sidebar .card {
    padding: 14px;
    max-width: 100%;
  }

  .learn-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .learn-form .form-group--actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .learn-form .btn {
    width: 100%;
    justify-content: center;
  }

  .lesson-main {
    min-height: 0;
    height: auto;
    overflow: visible;
    max-width: 100%;
  }

  .lesson-content {
    padding: 14px;
    min-height: 0;
    max-width: 100%;
    width: 100%;
    overflow-x: hidden;
  }

  .lesson-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .lesson-header h2 {
    margin: 0;
    font-size: 1.2rem;
  }

  .lesson-header__meta {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
  }

  .lesson-list__item {
    padding: 10px;
  }

  .lesson-list__meta {
    flex-direction: column;
    align-items: flex-start;
  }

  .lesson-qid-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    width: 100%;
  }

  .lesson-qid-values {
    word-break: break-word;
    overflow-wrap: anywhere;
    max-width: 100%;
  }

  .lesson-practice-btn {
    width: 100%;
  }

  .lesson-html {
    font-size: 1rem;
    max-width: 100%;
    overflow-x: auto;
    word-break: break-word;
    overflow-wrap: anywhere;
  }

  .lesson-html table {
    display: block;
    width: 100%;
    max-width: 100%;
    table-layout: fixed;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .lesson-html th,
  .lesson-html td {
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
  }

  .lesson-podcast {
    margin-top: 16px;
  }
}

.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 0 auto;
}

.dashboard-span-full {
  grid-column: 1 / -1;
}

@media (min-width: 1024px) {
  .dashboard-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .dashboard-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }
}

@media (max-width: 767px) {
  .dashboard-grid {
    gap: 1rem;
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1024px) {
.dashboard-span-2 {
  grid-column: span 2;
}

.dashboard-span-full {
  grid-column: 1 / -1;
}

/* Review page tweaks */
.review-header__actions {
  gap: 0.5rem;
}

.review-header__actions .muted {
  text-align: right;
}

.insight-title {
  margin-top: 1rem;
  font-size: 1.15rem;
  font-weight: 700;
}

.insight-summary {
  font-size: 1.05rem;
}

.insight-accent {
  color: #dc2626;
  font-weight: 700;
}
}

.dashboard-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.5rem;
  align-items: center;
  justify-items: center;
  margin-top: 1.5rem;
}

.summary-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 200px;
}

.page-dashboard .dashboard-summary .summary-item {
  border: none;
  background: transparent;
  padding: 0;
  box-shadow: none;
  border-radius: 0;
}

.summary-item__title {
  margin: 0 0 1rem 0;
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-align: center;
}

.summary-item__chart {
  position: relative;
  width: 160px;
  height: 160px;
}

.exam-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  margin-left: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-blue);
  background-color: var(--accent-blue-baby);
  border-radius: var(--radius-pill);
  vertical-align: middle;
}

@media (max-width: 767px) {
  .dashboard-summary-grid {
    gap: 1rem;
    grid-template-columns: 1fr 1fr;
  }

  .summary-item__chart {
    width: 120px;
    height: 120px;
  }

  .summary-item__title {
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
  }

  .exam-badge {
    display: block;
    margin-left: 0;
    margin-top: 0.5rem;
  }

  .dashboard-summary h2 {
    text-align: center;
  }

  .chart-container--short {
    aspect-ratio: 3 / 1;
    min-height: 120px;
  }

  .chart-container--square {
    aspect-ratio: 1 / 1;
    min-height: 220px;
  }
}

@media (max-width: 400px) {
  .dashboard-summary-grid {
    grid-template-columns: 1fr;
  }

  .summary-item {
    max-width: 100%;
  }

  .summary-item__chart {
    width: 140px;
    height: 140px;
  }
}

@media (max-width: 767px) {
  .dashboard-table-wrapper {
    margin: 0 -1rem;
    padding: 0 1rem;
  }

  .dashboard-table {
    font-size: 0.875rem;
  }

  .dashboard-table th,
  .dashboard-table td {
    padding: 0.75rem 0.5rem;
  }

  .dashboard-share {
    min-width: 100px;
  }

  .dashboard-actions {
    white-space: nowrap;
  }
}