/* Breast Health Intelligence Studio — Public Landing Page Experience */

/* Section Spacing & Transitions */
.studio-hero {
  position: relative;
  padding: clamp(var(--space-8), 5vw, var(--space-16)) 0 clamp(var(--space-12), 6vw, var(--space-20));
  background: radial-gradient(circle at 85% 20%, rgba(13, 148, 136, 0.08), transparent 45%),
              radial-gradient(circle at 15% 80%, rgba(37, 99, 235, 0.05), transparent 40%),
              var(--canvas-bg);
  overflow: hidden;
  border-bottom: 1px solid var(--border-subtle);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(var(--space-8), 4vw, var(--space-16));
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: clamp(1.875rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
  color: var(--slate-950);
  overflow-wrap: break-word;
}

.hero-title span.accent-teal {
  color: var(--teal-700);
}

.hero-description {
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.65;
  color: var(--slate-700);
  margin-bottom: var(--space-8);
  max-width: 58ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.hero-safety-pill {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: 0.5rem 1rem;
  background-color: var(--warning-bg);
  border: 1px solid var(--warning-line);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  color: var(--warning-text);
  font-weight: 600;
  max-width: 100%;
}

/* Hero Visual Composition Stage */
.hero-visual-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.hero-media-frame {
  position: relative;
  background-color: #020617;
  border: 1px solid var(--slate-800);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.hero-media-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background-color: rgba(15, 23, 42, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--slate-400);
}

.hero-media-body {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #000000;
}

.hero-media-body img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: contrast(1.1) brightness(0.95);
}

.hero-media-overlay-badge {
  position: absolute;
  bottom: var(--space-4);
  left: var(--space-4);
  background-color: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero-metrics-floating {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.hero-stat-card {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-md);
}

.hero-stat-card small {
  display: block;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--slate-500);
  margin-bottom: var(--space-1);
}

.hero-stat-card strong {
  display: block;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--slate-900);
}

.hero-stat-card .stat-val {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--teal-700);
  margin-top: var(--space-1);
}

/* Beat 02: Mission Section */
.mission-strip {
  padding: clamp(var(--space-10), 4vw, var(--space-16)) 0;
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-subtle);
}

.mission-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.mission-lead {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--slate-900);
}

.mission-text {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--slate-600);
}

/* ============================================================
   Beat 03: Model Selection Story & Evidence Boards
   ============================================================ */
.model-selection-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-8);
}

@media (max-width: 1024px) {
  .model-selection-grid {
    grid-template-columns: 1fr;
  }
}

.selection-study-board {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition-all);
}

.selection-study-board:hover {
  box-shadow: var(--shadow-md);
}

.selection-board-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.selection-board-header.teal-theme {
  background: linear-gradient(180deg, rgba(13, 148, 136, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
  border-top: 4px solid var(--teal-600);
}

.selection-board-header.blue-theme {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
  border-top: 4px solid var(--blue-600);
}

.selection-board-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  flex-grow: 1;
}

/* Candidate Comparison Table */
.selection-table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background-color: #ffffff;
}

.selection-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.8125rem;
}

.selection-table th {
  padding: 0.625rem 0.6875rem;
  background-color: var(--slate-50);
  color: var(--slate-600);
  font-weight: 700;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.selection-table td {
  padding: 0.625rem 0.6875rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--slate-700);
  white-space: nowrap;
}

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

.selection-table td.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.selection-table tr.is-selected {
  background-color: rgba(13, 148, 136, 0.08);
  font-weight: 600;
}

.selection-table.blue-theme tr.is-selected {
  background-color: rgba(37, 99, 235, 0.08);
}

.selection-table tr.is-selected td:first-child {
  border-left: 3px solid var(--teal-600);
  color: var(--slate-950);
  font-weight: 700;
}

.selection-table.blue-theme tr.is-selected td:first-child {
  border-left: 3px solid var(--blue-600);
}

.selected-star {
  display: inline-block;
  color: #d97706;
  margin-left: 0.25rem;
  font-weight: 800;
}

/* Flow Gate Arrow */
.selection-gate-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 auto;
}

.gate-arrow-teal {
  background-color: var(--teal-50);
  color: var(--teal-800);
  border: 1px solid var(--teal-200);
}

.gate-arrow-blue {
  background-color: var(--blue-50);
  color: var(--blue-800);
  border: 1px solid var(--blue-200);
}

/* Why this model callout */
.why-model-box {
  padding: var(--space-5);
  border-radius: var(--radius-xl);
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
}

.why-model-box h4 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.why-model-lead {
  font-size: 0.875rem;
  color: var(--slate-700);
  line-height: 1.55;
  margin-bottom: 0.75rem;
}

.why-model-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.why-model-list li {
  font-size: 0.8125rem;
  color: var(--slate-600);
  line-height: 1.45;
  position: relative;
  padding-left: 1.125rem;
}

.why-model-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--teal-600);
  font-weight: 800;
}

.why-model-list.blue-theme li::before {
  color: var(--blue-600);
}

/* Locked Held-Out Test Report */
.heldout-report-card {
  padding: var(--space-5);
  border-radius: var(--radius-xl);
  background-color: #0f172a;
  color: #ffffff;
  border: 1px solid #334155;
}

.heldout-report-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #1e293b;
}

.heldout-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
}

.heldout-badge-teal {
  background-color: rgba(13, 148, 136, 0.2);
  color: #2dd4bf;
  border: 1px solid rgba(45, 212, 191, 0.3);
}

.heldout-badge-blue {
  background-color: rgba(37, 99, 235, 0.2);
  color: #60a5fa;
  border: 1px solid rgba(96, 165, 250, 0.3);
}

.heldout-metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem 0.75rem;
  margin-top: 0.5rem;
}

.heldout-metric-cell small {
  display: block;
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #94a3b8;
}

.heldout-metric-cell b {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 700;
  color: #f8fafc;
}

.heldout-contingency-strip {
  margin-top: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px dashed #334155;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: #94a3b8;
}

.heldout-report-sub {
  font-size: 0.6875rem;
  color: #64748b;
  margin-top: 0.5rem;
  font-style: italic;
}

/* Expandable figures drawer */
.selection-figures-toggle {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--slate-50);
}

.selection-toggle-summary {
  padding: 0.625rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--slate-700);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.selection-toggle-summary:hover {
  background-color: var(--slate-100);
  color: var(--slate-900);
}

.selection-figures-body {
  padding: var(--space-4);
  background-color: #ffffff;
  border-top: 1px solid var(--border-subtle);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.selection-figure-card {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: #020617;
}

.selection-figure-card img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
}

.selection-figure-caption {
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
  color: #94a3b8;
  background-color: #0f172a;
  border-top: 1px solid #1e293b;
}

/* Mobile responsive for selection table: transform into stacked readable comparison cards */
@media (max-width: 640px) {
  .selection-table-wrap {
    background-color: transparent;
    border: none;
  }

  .selection-table thead {
    display: none;
  }

  .selection-table,
  .selection-table tbody,
  .selection-table tr {
    display: block;
    width: 100%;
  }

  .selection-table tr {
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    margin-bottom: 0.75rem;
    background-color: #ffffff;
    box-shadow: var(--shadow-sm);
  }

  .selection-table tr.is-selected {
    background-color: rgba(13, 148, 136, 0.05);
    border: 2px solid var(--teal-500);
  }

  .selection-table.blue-theme tr.is-selected {
    background-color: rgba(37, 99, 235, 0.05);
    border: 2px solid var(--blue-500);
  }

  .selection-table td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.35rem 0;
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    white-space: normal;
    font-size: 0.8125rem;
  }

  .selection-table td:last-child {
    border-bottom: none;
    padding-top: 0.5rem;
  }

  .selection-table td::before {
    content: attr(data-label);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--slate-500);
  }

  .selection-table tr td:first-child {
    border-left: none !important;
    border-bottom: 1px solid var(--slate-200);
    padding-bottom: 0.5rem;
    margin-bottom: 0.25rem;
    font-size: 0.9375rem;
  }

  .selection-table tr td:first-child::before {
    display: none;
  }

  .heldout-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================================
   Beat 04: From Probability to Prediction (Telemetry)
   ============================================================ */
.telemetry-question-strip {
  padding: 0.875rem 1.25rem;
  margin-bottom: var(--space-6);
  background-color: rgba(15, 23, 42, 0.6);
  border-left: 4px solid var(--teal-400);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #f1f5f9;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.telemetry-margin-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.margin-pill-pos {
  background-color: rgba(239, 68, 68, 0.2);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.margin-pill-neg {
  background-color: rgba(16, 185, 129, 0.2);
  color: #6ee7b7;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.interactive-preview-stage {
  background-color: var(--slate-900);
  border-radius: var(--radius-2xl);
  padding: clamp(var(--space-6), 4vw, var(--space-10));
  color: #ffffff;
  box-shadow: var(--shadow-xl);
}

.preview-controls-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--slate-800);
  margin-bottom: var(--space-6);
}

.preset-pills-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.preset-pill-btn {
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background-color: var(--slate-800);
  color: var(--slate-200);
  border: 1px solid var(--slate-700);
  cursor: pointer;
  transition: var(--transition-all);
}

.preset-pill-btn:hover,
.preset-pill-btn.active {
  background-color: var(--teal-600);
  color: #ffffff;
  border-color: var(--teal-500);
}

.preview-dual-display {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: stretch;
}

@media (max-width: 900px) {
  .preview-dual-display {
    grid-template-columns: 1fr;
  }
}

.preview-meter-box {
  background-color: var(--slate-950);
  border: 1px solid var(--slate-800);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* Beat 05 & 06: Learn Editorial Splits */
.editorial-split-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-8), 4vw, var(--space-12));
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-8);
  align-items: center;
}

.editorial-split-media {
  width: 100%;
  height: 100%;
  min-height: 340px;
  position: relative;
  background-color: #090d16;
  overflow: hidden;
}

.editorial-split-media img,
.editorial-split-media svg {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.editorial-split-content {
  padding: clamp(var(--space-6), 4vw, var(--space-10));
}

/* Beat 10: Limitations & Safety Block */
.safety-deep-block {
  background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
  border: 1px solid #fde68a;
  border-radius: var(--radius-2xl);
  padding: clamp(var(--space-6), 4vw, var(--space-10));
  box-shadow: var(--shadow-sm);
}

.safety-deep-block h3 {
  color: #92400e;
  margin-top: 0;
}

.safety-deep-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding: 0;
  list-style: none;
}

.safety-deep-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: 0.9375rem;
  line-height: 1.5;
  color: #78350f;
}

.safety-deep-list li::before {
  content: '⚠';
  color: #d97706;
  font-size: 1.125rem;
  font-weight: 800;
}

/* Beat 11: Research Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.team-member-card {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.team-avatar-placeholder {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--teal-100), var(--blue-100));
  color: var(--teal-800);
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
}

.team-member-card strong {
  display: block;
  font-size: 0.9375rem;
  color: var(--slate-900);
}

.team-member-card small {
  display: block;
  font-size: 0.75rem;
  color: var(--slate-500);
  margin-top: var(--space-1);
}

/* Footer */
.studio-footer {
  background-color: var(--slate-950);
  color: var(--slate-400);
  padding: var(--space-16) 0 var(--space-8);
  border-top: 1px solid var(--slate-800);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-8);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid var(--slate-800);
}

.footer-col h5 {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #ffffff;
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--slate-400);
}

.footer-links a:hover {
  color: var(--teal-400);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-8);
  font-size: 0.8125rem;
  color: var(--slate-500);
}

/* Responsive Adaptations for Public Experience */
@media (max-width: 1024px) {
  .hero-grid,
  .mission-grid,
  .study-dual-grid,
  .preview-dual-display,
  .editorial-split-card {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .team-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-metrics-floating,
  .study-metrics-row,
  .safety-deep-list,
  .team-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .studio-btn {
    width: 100%;
  }
}

/* ============================================================
   PHASE 4R BATCH A: AUTHENTICATED QUICK START BAR
   ============================================================ */
.auth-quickstart-strip {
  display: none; /* Controlled by landing.js when authenticated */
  background: linear-gradient(135deg, #f0fdfa 0%, #ecfeff 50%, #f8fafc 100%);
  border-bottom: 1px solid var(--teal-200, #99f6e4);
  padding: clamp(var(--space-4), 2vw, var(--space-6)) 0;
  position: relative;
  z-index: 10;
}

.auth-quickstart-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.auth-quickstart-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.auth-quickstart-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--slate-900);
  margin: 0;
}

.auth-quickstart-user-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  background-color: var(--teal-100, #ccfbf1);
  color: var(--teal-900, #134e4a);
  border: 1px solid var(--teal-300, #5eead4);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.auth-quickstart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-3);
}

.quickstart-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.875rem 1rem;
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--slate-800);
  transition: all var(--duration-fast) ease;
  box-shadow: var(--shadow-sm);
}

.quickstart-card:hover {
  transform: translateY(-2px);
  border-color: var(--teal-400);
  box-shadow: var(--shadow-md);
}

.quickstart-icon {
  font-size: 1.375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  background-color: var(--slate-50);
  flex-shrink: 0;
}

.quickstart-content {
  display: flex;
  flex-direction: column;
}

.quickstart-content strong {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--slate-900);
  line-height: 1.3;
}

.quickstart-content span {
  font-size: 0.75rem;
  color: var(--slate-500);
  line-height: 1.2;
  margin-top: 2px;
}

/* ============================================================
   PHASE 4R BATCH A: RESEARCH STORY & DEEP DIVE SECTION
   ============================================================ */
.research-story-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(var(--space-8), 4vw, var(--space-12));
  margin-top: var(--space-8);
}

.research-step-card {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-6), 3vw, var(--space-8));
  box-shadow: var(--shadow-sm);
}

.research-step-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.step-badge-teal {
  background-color: var(--teal-50);
  color: var(--teal-800);
  border: 1px solid var(--teal-200);
}

.step-badge-blue {
  background-color: var(--blue-50);
  color: var(--blue-800);
  border: 1px solid var(--blue-200);
}

.step-badge-slate {
  background-color: var(--slate-100);
  color: var(--slate-800);
  border: 1px solid var(--slate-300);
}

.research-deep-dive-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
}

@media (max-width: 1024px) {
  .research-deep-dive-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .research-deep-dive-grid {
    grid-template-columns: 1fr;
  }
}

.deep-dive-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--space-5);
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: all var(--duration-fast) ease;
}

.deep-dive-card:hover {
  transform: translateY(-2px);
  border-color: var(--teal-400);
  box-shadow: var(--shadow-md);
}

.deep-dive-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--slate-900);
  margin: 0.5rem 0 0.25rem;
}

.deep-dive-card p {
  font-size: 0.8125rem;
  color: var(--slate-600);
  margin: 0 0 1rem;
  line-height: 1.45;
}

.deep-dive-link-text {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--teal-700);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* ============================================================
   PHASE 4R BATCH A: LEARN EDUCATIONAL HUB
   ============================================================ */
.learn-nav-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.75rem;
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-8);
  box-shadow: var(--shadow-sm);
}

.learn-pill-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--slate-700);
  text-decoration: none;
  background-color: transparent;
  transition: all var(--duration-fast) ease;
  white-space: nowrap;
}

.learn-pill-link:hover {
  background-color: var(--slate-100);
  color: var(--slate-950);
}

.learn-pill-link.active {
  background-color: var(--teal-700);
  color: #ffffff;
}

/* Screening Table */
.screening-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background-color: #ffffff;
  box-shadow: var(--shadow-sm);
  margin: var(--space-4) 0;
}

.screening-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  text-align: left;
}

.screening-table th {
  background-color: var(--slate-50);
  color: var(--slate-700);
  font-weight: 700;
  padding: 0.875rem 1rem;
  border-bottom: 2px solid var(--border-subtle);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.screening-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--slate-800);
  line-height: 1.5;
  vertical-align: top;
}

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

.screening-table tr:hover td {
  background-color: #f8fafc;
}

/* Warning Signs Grid */
.warning-signs-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
}

@media (max-width: 1024px) {
  .warning-signs-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .warning-signs-grid {
    grid-template-columns: 1fr;
  }
}

.warning-sign-card {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--duration-fast) ease;
}

.warning-sign-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.warning-sign-icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
  display: inline-block;
}

.warning-sign-card h4 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--slate-900);
  margin: 0 0 0.5rem;
}

.warning-sign-card p {
  font-size: 0.875rem;
  color: var(--slate-600);
  line-height: 1.5;
  margin: 0;
  flex-grow: 1;
}

/* Myths vs Facts Grid */
.myths-facts-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-6);
}

@media (max-width: 768px) {
  .myths-facts-grid {
    grid-template-columns: 1fr;
  }
}

.myth-fact-card {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.myth-part {
  background-color: #fff1f2;
  border-bottom: 1px solid #fecdd3;
  padding: 1rem 1.25rem;
}

.myth-part-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #be123c;
  margin-bottom: 0.25rem;
}

.myth-part h4 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: #9f1239;
  margin: 0;
}

.fact-part {
  background-color: #f0fdf4;
  padding: 1.25rem;
}

.fact-part-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #15803d;
  margin-bottom: 0.375rem;
}

.fact-part p {
  font-size: 0.875rem;
  color: #166534;
  line-height: 1.55;
  margin: 0;
}

/* Recovery Grid */
.recovery-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
}

@media (max-width: 1024px) {
  .recovery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .recovery-grid {
    grid-template-columns: 1fr;
  }
}

.recovery-card {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}

.recovery-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--slate-900);
  margin: 0.5rem 0 0.375rem;
}

.recovery-card p {
  font-size: 0.8125rem;
  color: var(--slate-600);
  line-height: 1.5;
  margin: 0;
}

/* Video Library Cards */
.video-library-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-6);
}

@media (max-width: 768px) {
  .video-library-grid {
    grid-template-columns: 1fr;
  }
}

.video-player-card {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.video-poster-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: #020617;
  cursor: pointer;
  overflow: hidden;
}

.video-poster-stage img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-normal) ease;
}

.video-poster-stage:hover img {
  transform: scale(1.02);
}

.video-play-button {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(2, 6, 23, 0.35);
  transition: background-color var(--duration-fast);
}

.video-play-button .play-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: transform var(--duration-fast);
}

.video-poster-stage:hover .play-circle {
  transform: scale(1.1);
}

.video-duration-pill {
  position: absolute;
  bottom: 0.75rem;
  right: 0.75rem;
  background-color: rgba(15, 23, 42, 0.85);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
}

.video-meta-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.video-meta-body h4 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--slate-900);
  margin: 0.5rem 0;
  line-height: 1.4;
}

.video-meta-body p {
  font-size: 0.875rem;
  color: var(--slate-600);
  line-height: 1.5;
  margin: 0 0 1rem;
  flex-grow: 1;
}

.video-details-box {
  padding: 0.625rem 0.875rem;
  background-color: var(--slate-50);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  color: var(--slate-600);
  margin-bottom: 1rem;
  line-height: 1.5;
}

/* FAQ Accordion */
.faq-accordion-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.faq-item {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--duration-fast);
}

.faq-item[open] {
  border-color: var(--teal-400);
}

.faq-item summary {
  padding: 1.125rem 1.25rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--slate-900);
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "▾";
  font-size: 1.25rem;
  color: var(--slate-400);
  transition: transform var(--duration-fast);
}

.faq-item[open] summary::after {
  transform: rotate(180deg);
  color: var(--teal-600);
}

.faq-answer {
  padding: 0 1.25rem 1.25rem 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--slate-700);
  border-top: 1px solid var(--border-subtle);
  margin-top: 0.25rem;
  padding-top: 1rem;
}