:root {
    --case-accent: #0F1B2D;
    --case-accent-soft: rgba(15, 27, 45, 0.1);
    --case-paper: #F6F4EE;
    --case-surface: #FFFFFF;
    --case-surface-alt: #F7F3EA;
    --case-line: #E4E0D7;
    --case-ink: #0F1B2D;
    --case-muted: #6E788C;
    --font-body: "Inter", -apple-system, sans-serif;
    --font-display: "Source Serif Pro", Georgia, serif;
    --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background:
        radial-gradient(circle at top right, rgba(255, 255, 255, 0.72), transparent 32%),
        var(--case-paper);
    color: var(--case-ink);
    font-family: var(--font-body);
    line-height: 1.6;
}

body.dark-case {
    background:
        radial-gradient(circle at top right, rgba(255, 255, 255, 0.04), transparent 24%),
        var(--case-paper);
}

body.dark-case .hero-copy,
body.dark-case .hero-panel {
    border-color: rgba(255, 255, 255, 0.1);
}

body.dark-case .hero-copy {
    background:
        linear-gradient(135deg, rgba(26, 37, 56, 0.98), rgba(20, 30, 52, 0.98)),
        var(--case-surface);
    box-shadow: 0 16px 36px rgba(6, 12, 24, 0.28);
}

body.dark-case .hero-panel {
    background:
        linear-gradient(180deg, rgba(26, 37, 56, 0.96), rgba(15, 27, 45, 0.96)),
        var(--case-surface-alt);
    box-shadow: 0 16px 36px rgba(6, 12, 24, 0.24);
}

h1,
h2,
h3,
h4 {
    margin: 0;
    font-family: var(--font-display);
}

p {
    margin: 0;
}

a {
    color: inherit;
}

.p-topbar {
    position: relative;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 12px 40px;
    background: #071621;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    color: #FFFFFF;
    font-family: "Inter", -apple-system, sans-serif;
}

.p-topbar .p-brand {
    color: #FFFFFF;
    font-family: "Source Serif Pro", Georgia, serif;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: -0.2px;
    text-decoration: none;
}

.p-topbar .p-brand span {
    margin-left: 2px;
    color: rgba(255, 255, 255, 0.5);
    font-weight: 400;
}

.p-topbar .p-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 26px;
    font-size: 13px;
}

.p-topbar .p-nav a {
    color: rgba(255, 255, 255, 0.65);
    font-weight: 500;
    text-decoration: none;
    transition: color 0.15s ease;
}

.p-topbar .p-nav a:hover {
    color: #FFD77A;
}

.case-wrap {
    max-width: 1200px;
    margin: 0 auto;
    padding: 56px 40px 84px;
}

.crumb {
    margin-bottom: 16px;
    color: var(--case-muted);
    font-size: 12px;
    letter-spacing: 1.7px;
    text-transform: uppercase;
}

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

.crumb a:hover {
    color: var(--case-ink);
}

.crumb span {
    color: var(--case-ink);
    font-weight: 700;
}

.library-hero,
.page-hero {
    display: grid;
    grid-template-columns: 1.35fr 0.95fr;
    gap: 24px;
    align-items: stretch;
    margin-bottom: 52px;
}

.hero-copy,
.hero-panel {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--case-line);
    border-radius: 24px;
}

.hero-copy {
    padding: 38px 40px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(247, 243, 234, 0.92)),
        var(--case-surface);
}

.hero-copy::before,
.hero-panel::before {
    content: "";
    position: absolute;
    inset: auto auto -80px -40px;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: var(--case-accent-soft);
    pointer-events: none;
}

.hero-panel {
    padding: 30px;
    background: var(--case-surface);
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
    color: var(--case-muted);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.hero-eyebrow::before {
    content: "";
    width: 28px;
    height: 2px;
    background: var(--case-accent);
    opacity: 0.35;
}

.hero-copy h1 {
    margin-bottom: 16px;
    color: var(--case-ink);
    font-size: 52px;
    font-weight: 700;
    letter-spacing: -1.4px;
    line-height: 1.05;
}

.hero-copy h1 .accent {
    color: var(--case-accent);
}

.hero-copy p {
    max-width: 60ch;
    color: var(--case-muted);
    font-size: 16px;
}

body.dark-case .hero-copy p,
body.dark-case .metric-card .sub,
body.dark-case .metric-card .k,
body.dark-case .hero-eyebrow {
    color: var(--case-muted);
}

.hero-tagline {
    margin-top: 18px;
    color: var(--case-ink);
    font-size: 14px;
    font-weight: 600;
}

body.dark-case .hero-tagline {
    color: #F3F7FB;
}

.hero-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.metric-card {
    padding: 16px 18px;
    border: 1px solid var(--case-line);
    border-radius: 16px;
    background: var(--case-surface-alt);
}

body.dark-case .metric-card {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
}

.metric-card .k {
    margin-bottom: 4px;
    color: var(--case-muted);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.3px;
    text-transform: uppercase;
}

.metric-card .v {
    color: var(--case-ink);
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.8px;
    line-height: 1.1;
}

.metric-card .sub {
    margin-top: 4px;
    color: var(--case-muted);
    font-size: 12px;
}

.section {
    margin-bottom: 54px;
    scroll-margin-top: 88px;
}

.page-layout {
    display: grid;
    grid-template-columns: 238px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

.content-column {
    min-width: 0;
}

.toc {
    position: sticky;
    top: 24px;
    background: var(--case-surface);
    border: 1px solid var(--case-line);
    border-radius: 20px;
    padding: 18px;
    box-shadow: 0 14px 30px rgba(15, 27, 45, 0.08);
}

.toc .toc-label {
    margin-bottom: 10px;
    color: var(--case-accent);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.toc nav {
    display: grid;
    gap: 6px;
}

.toc a {
    display: block;
    padding: 9px 10px;
    border: 1px solid transparent;
    border-radius: 12px;
    color: var(--case-muted);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
}

.toc a:hover {
    background: var(--case-surface-alt);
    border-color: var(--case-line);
    color: var(--case-ink);
}

.section-head {
    margin-bottom: 20px;
}

.section-head .eyebrow {
    margin-bottom: 8px;
    color: var(--case-accent);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.8px;
    text-transform: uppercase;
}

.section-head h2 {
    margin-bottom: 8px;
    color: var(--case-ink);
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.8px;
}

.section-head p {
    max-width: 64ch;
    color: var(--case-muted);
    font-size: 14px;
}

.star-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.star-card,
.detail-card,
.proof-card,
.library-card,
.related-card,
.callout {
    border: 1px solid var(--case-line);
    border-radius: 20px;
    background: var(--case-surface);
}

.star-card {
    padding: 24px;
}

.star-step {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    color: var(--case-accent);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 1.6px;
    text-transform: uppercase;
}

.star-step::before {
    content: "";
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--case-accent);
}

.star-card h3 {
    margin-bottom: 10px;
    color: var(--case-ink);
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
    line-height: 1.15;
}

.star-card p {
    color: var(--case-muted);
    font-size: 14px;
}

.detail-grid,
.proof-grid,
.related-grid,
.library-grid {
    display: grid;
    gap: 18px;
}

.detail-grid {
    grid-template-columns: 1fr 1fr 1fr;
}

.proof-grid {
    grid-template-columns: repeat(4, 1fr);
}

.related-grid {
    grid-template-columns: repeat(3, 1fr);
}

.library-grid {
    grid-template-columns: 1fr 1fr;
}

.journey-map {
    display: grid;
    gap: 14px;
}

.journey-intro {
    max-width: 64ch;
    color: var(--case-muted);
    font-size: 14px;
}

.journey-strip {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 12px;
}

.journey-stage {
    min-height: 112px;
    padding: 16px 14px;
    border: 1px solid var(--case-line);
    border-radius: 18px;
    background: var(--case-surface);
}

.journey-stage .phase {
    display: block;
    margin-bottom: 8px;
    color: var(--case-muted);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.4px;
    text-transform: uppercase;
}

.journey-stage h3 {
    margin-bottom: 6px;
    color: var(--case-ink);
    font-size: 18px;
    line-height: 1.1;
}

.journey-stage p {
    color: var(--case-muted);
    font-size: 12.5px;
    line-height: 1.45;
}

.journey-stage.active {
    border-color: var(--case-accent);
    box-shadow: 0 10px 24px rgba(15, 27, 45, 0.08);
}

.journey-stage.active .phase {
    color: var(--case-accent);
}

.journey-stage.support {
    background: var(--case-surface-alt);
}

.detail-card,
.proof-card,
.related-card,
.library-card {
    padding: 22px 24px;
}

.detail-card h3,
.proof-card h3,
.related-card h3,
.library-card h3 {
    margin-bottom: 10px;
    color: var(--case-ink);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.4px;
}

.detail-card p,
.proof-card p,
.related-card p,
.library-card p {
    color: var(--case-muted);
    font-size: 14px;
}

.detail-card ul,
.related-card ul,
.library-card ul {
    margin: 0;
    padding-left: 18px;
    color: var(--case-muted);
    font-size: 14px;
}

.detail-card li,
.related-card li,
.library-card li {
    margin: 8px 0;
}

.detail-card strong,
.proof-card strong,
.related-card strong,
.library-card strong,
.callout strong {
    color: var(--case-ink);
}

.proof-card .big {
    margin-bottom: 6px;
    color: var(--case-accent);
    font-size: 40px;
    font-weight: 800;
    letter-spacing: -1.2px;
    line-height: 1;
}

.proof-card .label {
    margin-bottom: 8px;
    color: var(--case-ink);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.2px;
}

.callout {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 18px;
    padding: 22px 24px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(247, 243, 234, 0.92));
}

body.dark-case .callout {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
}

.callout-badge {
    min-width: 88px;
    align-self: start;
    padding: 10px 12px;
    border-radius: 14px;
    background: var(--case-accent);
    color: #FFFFFF;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 1.4px;
    text-align: center;
    text-transform: uppercase;
}

.callout p {
    color: var(--case-muted);
    font-size: 14px;
}

.related-card a,
.library-card a,
.crumb a {
    text-decoration: none;
}

.link-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
}

.link-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 12px;
    border-radius: 999px;
    border: 1px solid var(--case-line);
    background: var(--case-surface-alt);
    color: var(--case-ink);
    font-size: 12px;
    font-weight: 700;
    text-decoration: none;
}

body.dark-case .link-chip {
    background: var(--case-surface-alt);
    border-color: var(--case-line);
}

.link-chip:hover {
    border-color: var(--case-accent);
    color: var(--case-accent);
}

.library-card {
    position: relative;
    overflow: hidden;
    border-top: 5px solid var(--card-accent);
    background: linear-gradient(180deg, var(--card-surface) 0%, #FFFFFF 100%);
}

.library-card::after {
    content: "";
    position: absolute;
    right: -28px;
    bottom: -38px;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: var(--card-glow);
    pointer-events: none;
}

.library-card .eyebrow {
    margin-bottom: 10px;
    color: var(--card-accent);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 1.7px;
    text-transform: uppercase;
}

.library-card .metric-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 14px 0 16px;
}

.library-card .metric-pill {
    padding: 5px 9px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid rgba(15, 27, 45, 0.08);
    color: var(--case-ink);
    font-size: 11px;
    font-weight: 700;
}

.library-card .cta {
    margin-top: 12px;
    color: var(--card-accent);
    font-size: 13px;
    font-weight: 700;
}

.theme-foxit {
    --card-accent: #FF5F00;
    --card-glow: rgba(43, 140, 190, 0.16);
    --card-surface: #F2FAFF;
}

.theme-squirrel {
    --card-accent: #FF6B35;
    --card-glow: rgba(255, 107, 53, 0.16);
    --card-surface: #FFF7F2;
}

.theme-netgain {
    --card-accent: #F26A2E;
    --card-glow: rgba(242, 106, 46, 0.14);
    --card-surface: #FFF8F4;
}

.theme-uta {
    --card-accent: #0055A4;
    --card-glow: rgba(0, 85, 164, 0.12);
    --card-surface: #F7FAFE;
}

.library-note {
    margin-top: 28px;
    padding: 18px 20px;
    border: 1px solid var(--case-line);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.72);
    color: var(--case-muted);
    font-size: 13px;
}

.proprietary-note {
    margin-top: 22px;
    padding: 13px 16px;
    border: 1px solid var(--case-line);
    border-radius: 16px;
    background: var(--case-surface-alt);
    color: var(--case-muted);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.case-footer {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 56px;
    padding-top: 24px;
    border-top: 1px solid var(--case-line);
    color: var(--case-muted);
    font-size: 12px;
}

.case-footer a {
    color: var(--case-ink);
    font-weight: 700;
    text-decoration: none;
}

@media (max-width: 960px) {
    .page-layout {
        grid-template-columns: 1fr;
    }

    .toc {
        position: relative;
        top: auto;
    }

    .library-hero,
    .page-hero,
    .detail-grid,
    .proof-grid,
    .related-grid,
    .library-grid,
    .journey-strip {
        grid-template-columns: 1fr;
    }

    .hero-copy h1 {
        font-size: 38px;
    }
}

@media (max-width: 720px) {
    .p-topbar {
        flex-direction: column;
        align-items: flex-start;
        padding: 12px 20px;
    }

    .p-topbar .p-nav {
        gap: 16px;
    }

    .case-wrap {
        padding: 44px 20px 72px;
    }

    .hero-copy,
    .hero-panel,
    .star-card,
    .detail-card,
    .proof-card,
    .related-card,
    .library-card,
    .callout {
        padding-left: 20px;
        padding-right: 20px;
    }

    .hero-copy h1 {
        font-size: 34px;
    }

    .hero-metrics {
        grid-template-columns: 1fr;
    }

    .callout {
        grid-template-columns: 1fr;
    }
}