:root {
    --bg: #0a1116;
    --bg2: #111922;
    --surface: rgba(18, 26, 33, 0.92);
    --surface2: rgba(24, 34, 44, 0.9);
    --border: rgba(151, 190, 181, 0.10);
    --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, .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: .82rem;
    transition: color .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, .08);
    border: 1px solid rgba(123, 240, 190, .2);
    color: var(--green);
    border-radius: 20px;
    padding: 5px 16px;
    font-size: .78rem;
    font-weight: 600;
    letter-spacing: .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: -.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 .3s ease, transform .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: .9rem;
    margin-bottom: 14px;
}

/* ── Tables ── */
.ngs-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .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, .02);
}

/* ── Badges ── */
.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: .72rem;
    font-weight: 600;
}

.badge-teal {
    background: rgba(57, 208, 240, .12);
    color: var(--teal);
    border: 1px solid rgba(57, 208, 240, .25);
}

.badge-green {
    background: rgba(63, 185, 80, .12);
    color: var(--green);
    border: 1px solid rgba(63, 185, 80, .25);
}

.badge-orange {
    background: rgba(240, 136, 62, .12);
    color: var(--orange);
    border: 1px solid rgba(240, 136, 62, .25);
}

.badge-purple {
    background: rgba(188, 140, 255, .12);
    color: var(--purple);
    border: 1px solid rgba(188, 140, 255, .25);
}

.badge-yellow {
    background: rgba(210, 153, 34, .12);
    color: var(--yellow);
    border: 1px solid rgba(210, 153, 34, .25);
}

/* ── Tips ── */
.tip {
    display: flex;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: .85rem;
    margin-top: 12px;
}

.tip-info {
    background: rgba(57, 208, 240, .07);
    border-left: 3px solid var(--teal);
    color: var(--muted);
}

.tip-warn {
    background: rgba(240, 136, 62, .07);
    border-left: 3px solid var(--orange);
    color: var(--muted);
}

.tip-success {
    background: rgba(63, 185, 80, .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: .8rem;
    line-height: 1.8;
    overflow-x: auto;
    margin-top: 12px;
    color: var(--text);
}

code {
    font-family: var(--mono);
    font-size: .85em;
    color: var(--teal);
    background: rgba(57, 208, 240, .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: .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: .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: .75rem;
    color: var(--muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .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: .85rem;
    font-family: var(--font);
    outline: none;
    transition: border-color .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: .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: .82rem;
    transition: color .2s;
}

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

.footer-note {
    font-size: .78rem;
    color: var(--dim);
}

/* ── Scroll reveal ── */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity .5s, transform .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: .95rem;
    margin-bottom: 36px;
    line-height: 1.6;
}

.gallery-group-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: .78rem;
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 20px;
    margin: 28px 0 14px;
}

.gallery-group-label.qc {
    background: rgba(57, 208, 240, .1);
    color: var(--teal);
}

.gallery-group-label.var {
    background: rgba(240, 136, 62, .1);
    color: var(--orange);
}

.gallery-group-label.de {
    background: rgba(63, 185, 80, .1);
    color: var(--green);
}

.gallery-group-label.func {
    background: rgba(188, 140, 255, .1);
    color: var(--purple);
}

.gallery-group-label.sc {
    background: rgba(248, 81, 73, .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 .2s, transform .2s, box-shadow .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, .4);
}

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

.chart-card-num {
    font-size: .7rem;
    font-weight: 700;
    font-family: var(--mono);
    color: var(--muted);
}

.chart-card-name {
    font-size: .85rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.3;
}

.chart-card-desc {
    font-size: .75rem;
    color: var(--muted);
    line-height: 1.4;
}

.chart-card-hint {
    font-size: .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, .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 .22s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(.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 .15s;
}

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

.modal-badge {
    display: inline-block;
    font-size: .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: .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: .75rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 18px 0 8px;
}

.modal-body p,
.modal-body li {
    font-size: .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, .06);
    border: 1px solid rgba(57, 208, 240, .2);
    border-radius: 10px;
    padding: 14px 16px;
    margin-top: 14px;
}

.modal-interview-box .label {
    font-size: .7rem;
    font-weight: 700;
    color: var(--teal);
    letter-spacing: .08em;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.modal-interview-box p {
    font-size: .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: .7rem;
    font-weight: 700;
    letter-spacing: .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: -.03em;
    margin-bottom: 8px;
}

.rag-section-sub {
    color: var(--muted);
    max-width: 580px;
    font-size: .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: .9rem;
    outline: none;
    transition: border-color .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 .88rem/1 inherit;
    cursor: pointer;
    transition: opacity .18s, transform .15s;
}

.rag-btn:hover {
    opacity: .88;
    transform: translateY(-1px);
}

.rag-btn:disabled {
    opacity: .45;
    cursor: not-allowed;
    transform: none;
}

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

.rag-card {
    background: rgba(22, 27, 34, .92);
    border: 1px solid #21262d;
    border-radius: 14px;
    padding: 18px 20px;
    transition: border-color .2s;
}

.rag-card:hover {
    border-color: rgba(57, 208, 240, .25);
}

.rag-card-title {
    font-size: .88rem;
    font-weight: 700;
    color: #e6edf3;
    margin-bottom: 6px;
}

.rag-card-type {
    display: inline-block;
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    padding: 3px 9px;
    border-radius: 999px;
    background: rgba(57, 208, 240, .1);
    border: 1px solid rgba(57, 208, 240, .2);
    color: var(--teal);
    margin-bottom: 8px;
}

.rag-card-text {
    font-size: .82rem;
    color: var(--muted);
    line-height: 1.7;
}

.rag-empty {
    text-align: center;
    color: var(--muted);
    font-size: .88rem;
    padding: 32px;
    border: 1px dashed #21262d;
    border-radius: 14px;
}

.rag-status {
    font-size: .8rem;
    color: var(--muted);
    margin-bottom: 12px;
    min-height: 1.4em;
}

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