:root {
  --bg: #0a1116;
  --bg2: #111922;
  --surface: rgba(18, 26, 33, 0.92);
  --surface2: rgba(24, 34, 44, 0.9);
  --border: rgba(151, 190, 181, 0.1);
  --border-hover: rgba(63, 185, 80, 0.28);
  --text: #e9f0ec;
  --muted: #94a59f;
  --dim: #5a716b;
  --teal: #58d7ff;
  --green: #7bf0be;
  --orange: #ffbc72;
  --purple: #b59cff;
  --red: #ff8392;
  --yellow: #ffd56b;
  --nav-h: 64px;
  --font: "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", Consolas, monospace;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.35);
  --radius: 20px;
  --radius-sm: 14px;
  --nav-accent: var(--green);
}

body {
  background:
    radial-gradient(
      ellipse 70% 50% at 15% 15%,
      rgba(123, 240, 190, 0.06),
      transparent
    ),
    radial-gradient(
      ellipse 60% 40% at 85% 25%,
      rgba(88, 215, 255, 0.05),
      transparent
    ),
    radial-gradient(
      ellipse 50% 40% at 50% 90%,
      rgba(255, 188, 114, 0.04),
      transparent
    ),
    linear-gradient(180deg, #081016 0%, #0b141c 50%, #081015 100%);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: rgba(123, 240, 190, 0.22);
}

/* ── Nav ── */
.nav-brand .dot {
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

/* ─── Hamburger ────────────────────────────────────────── */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
  transition: color 0.2s;
}

.back-btn:hover {
  color: var(--teal);
}

/* ── Hero ── */
.page-hero {
  padding: calc(var(--nav-h) + 60px) 40px 60px;
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.page-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(123, 240, 190, 0.08);
  border: 1px solid rgba(123, 240, 190, 0.2);
  color: var(--green);
  border-radius: 20px;
  padding: 5px 16px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.page-title {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.page-title span {
  color: var(--green);
}

.page-subtitle {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 620px;
  margin: 0 auto 40px;
}

/* ── Layout ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 40px 80px;
}

/* ── Step cards ── */
.steps-grid {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.step-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  align-items: start;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
  transition:
    border-color 0.3s ease,
    transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.step-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.step-num {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-body h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.step-body p {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 14px;
}

/* ── Tables ── */
.ngs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-top: 12px;
}

.ngs-table th {
  background: var(--surface2);
  color: var(--muted);
  font-weight: 600;
  text-align: left;
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
}

.ngs-table td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}

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

.ngs-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* ── Badges ── */
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
}

.badge-teal {
  background: rgba(57, 208, 240, 0.12);
  color: var(--teal);
  border: 1px solid rgba(57, 208, 240, 0.25);
}

.badge-green {
  background: rgba(63, 185, 80, 0.12);
  color: var(--green);
  border: 1px solid rgba(63, 185, 80, 0.25);
}

.badge-orange {
  background: rgba(240, 136, 62, 0.12);
  color: var(--orange);
  border: 1px solid rgba(240, 136, 62, 0.25);
}

.badge-purple {
  background: rgba(188, 140, 255, 0.12);
  color: var(--purple);
  border: 1px solid rgba(188, 140, 255, 0.25);
}

.badge-yellow {
  background: rgba(210, 153, 34, 0.12);
  color: var(--yellow);
  border: 1px solid rgba(210, 153, 34, 0.25);
}

/* ── Tips ── */
.tip {
  display: flex;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-top: 12px;
}

.tip-info {
  background: rgba(57, 208, 240, 0.07);
  border-left: 3px solid var(--teal);
  color: var(--muted);
}

.tip-warn {
  background: rgba(240, 136, 62, 0.07);
  border-left: 3px solid var(--orange);
  color: var(--muted);
}

.tip-success {
  background: rgba(63, 185, 80, 0.07);
  border-left: 3px solid var(--green);
  color: var(--muted);
}

/* ── Code block ── */
pre {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.8;
  overflow-x: auto;
  margin-top: 12px;
  color: var(--text);
}

code {
  font-family: var(--mono);
  font-size: 0.85em;
  color: var(--teal);
  background: rgba(57, 208, 240, 0.09);
  padding: 1px 6px;
  border-radius: 4px;
}

/* ── Pipeline viz ── */
.pipeline {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  margin-top: 12px;
}

.pipe-step {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 500;
}

.pipe-arrow {
  color: var(--dim);
  font-size: 1rem;
  padding: 0 2px;
  flex-shrink: 0;
}

/* ── Checklist ── */
.checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.checklist li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.88rem;
  color: var(--muted);
}

.checklist li::before {
  content: "✓";
  color: var(--green);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ── Interactive depth calculator ── */
.calc-panel {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin-top: 14px;
}

.calc-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 14px;
}

.calc-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 160px;
}

.calc-field label {
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.calc-field select,
.calc-field input {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.85rem;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.2s;
}

.calc-field select:focus,
.calc-field input:focus {
  border-color: var(--teal);
}

.calc-result {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.calc-stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  min-width: 130px;
}

.calc-stat-val {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--teal);
}

.calc-stat-lbl {
  font-size: 0.72rem;
  color: var(--dim);
  margin-top: 2px;
}

/* ── Divider ── */
hr.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ── Footer ── */
footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
  transition: color 0.2s;
}

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

.footer-note {
  font-size: 0.78rem;
  color: var(--dim);
}

/* ── Scroll reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.5s,
    transform 0.5s;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 700px) {
  .page-hero,
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .step-card {
    grid-template-columns: 1fr;
  }

  .pipeline {
    gap: 4px;
  }
}

/* ── NGS Results Gallery ── */
.gallery-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 64px 40px 0;
}

.gallery-section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.gallery-section .section-sub {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 36px;
  line-height: 1.6;
}

.gallery-group-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  margin: 28px 0 14px;
}

.gallery-group-label.qc {
  background: rgba(57, 208, 240, 0.1);
  color: var(--teal);
}

.gallery-group-label.var {
  background: rgba(240, 136, 62, 0.1);
  color: var(--orange);
}

.gallery-group-label.de {
  background: rgba(63, 185, 80, 0.1);
  color: var(--green);
}

.gallery-group-label.func {
  background: rgba(188, 140, 255, 0.1);
  color: var(--purple);
}

.gallery-group-label.sc {
  background: rgba(248, 81, 73, 0.1);
  color: var(--red);
}

.chart-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 16px 14px;
  cursor: pointer;
  transition:
    border-color 0.2s,
    transform 0.2s,
    box-shadow 0.2s;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chart-card:hover {
  border-color: var(--teal);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.chart-card canvas {
  width: 100% !important;
  border-radius: 6px;
}

.chart-card-num {
  font-size: 0.7rem;
  font-weight: 700;
  font-family: var(--mono);
  color: var(--muted);
}

.chart-card-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

.chart-card-desc {
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.4;
}

.chart-card-hint {
  font-size: 0.7rem;
  color: var(--dim);
  font-family: var(--mono);
  margin-top: auto;
  padding-top: 6px;
  border-top: 1px solid var(--border);
}

/* Modal */
.chart-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 600;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.chart-modal-overlay.open {
  display: flex;
}

.chart-modal-box {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 18px;
  width: 100%;
  max-width: 720px;
  max-height: 88vh;
  overflow-y: auto;
  padding: 32px;
  position: relative;
  animation: modalIn 0.22s ease;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(10px);
  }

  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.chart-modal-close {
  position: absolute;
  top: 16px;
  right: 20px;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
  transition: color 0.15s;
}

.chart-modal-close:hover {
  color: var(--text);
}

.modal-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  font-family: var(--mono);
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.chart-modal-box h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.chart-modal-box .modal-tool {
  font-size: 0.8rem;
  color: var(--muted);
  font-family: var(--mono);
  margin-bottom: 18px;
}

.modal-canvas-wrap {
  background: var(--surface);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 20px;
}

.modal-canvas-wrap canvas {
  width: 100% !important;
}

.modal-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 18px 0 8px;
}

.modal-body p,
.modal-body li {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.65;
}

.modal-body ul {
  padding-left: 18px;
}

.modal-body li {
  margin-bottom: 5px;
}

.modal-interview-box {
  background: rgba(57, 208, 240, 0.06);
  border: 1px solid rgba(57, 208, 240, 0.2);
  border-radius: 10px;
  padding: 14px 16px;
  margin-top: 14px;
}

.modal-interview-box .label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--teal);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.modal-interview-box p {
  font-size: 0.88rem;
  color: var(--text) !important;
  line-height: 1.6;
}

@media (max-width: 640px) {
  .gallery-section {
    padding: 48px 20px 0;
  }

  .chart-cards-grid {
    grid-template-columns: 1fr 1fr;
  }

  .chart-modal-box {
    padding: 22px 18px;
  }
}

/* ── RAG Search ── */
.rag-section {
  max-width: 1100px;
  margin: 64px auto 0;
  padding: 0 40px 80px;
}

.rag-section-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 6px;
}

.rag-section-title {
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.rag-section-sub {
  color: var(--muted);
  max-width: 580px;
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 26px;
}

.rag-input-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.rag-input {
  flex: 1;
  min-width: 200px;
  background: #111b24;
  border: 1px solid #21262d;
  border-radius: 10px;
  padding: 11px 16px;
  color: #e6edf3;
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.rag-input:focus {
  border-color: var(--teal);
}

.rag-input::placeholder {
  color: #484f58;
}

.rag-btn {
  background: var(--teal);
  color: #000;
  border: none;
  border-radius: 10px;
  padding: 11px 22px;
  font: 700 0.88rem/1 inherit;
  cursor: pointer;
  transition:
    opacity 0.18s,
    transform 0.15s;
}

.rag-btn:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

.rag-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.rag-results {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.rag-card {
  background: rgba(22, 27, 34, 0.92);
  border: 1px solid #21262d;
  border-radius: 14px;
  padding: 18px 20px;
  transition: border-color 0.2s;
}

.rag-card:hover {
  border-color: rgba(57, 208, 240, 0.25);
}

.rag-card-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: #e6edf3;
  margin-bottom: 6px;
}

.rag-card-type {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(57, 208, 240, 0.1);
  border: 1px solid rgba(57, 208, 240, 0.2);
  color: var(--teal);
  margin-bottom: 8px;
}

.rag-card-text {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.7;
}

.rag-empty {
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
  padding: 32px;
  border: 1px dashed #21262d;
  border-radius: 14px;
}

.rag-status {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 12px;
  min-height: 1.4em;
}

@media (max-width: 640px) {
  .rag-section {
    padding: 0 20px 60px;
  }
}