* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #f8f9fa;
    --bg-card: #fff;
    --text: #333;
    --text-secondary: #555;
    --text-muted: #7f8c8d;
    --heading: #2c3e50;
    --heading-secondary: #34495e;
    --border: #ecf0f1;
    --border-input: #ddd;
    --shadow: rgba(0, 0, 0, 0.1);
    --header-bg: #2c3e50;
    --nav-bg: #34495e;
    --table-header: #ecf0f1;
    --table-header-hover: #d5dbdb;
    --table-row-hover: #f5f6fa;
    --alert-warn-bg: #fef9e7;
    --alert-warn-border: #f9e79f;
    --alert-warn-text: #7d6608;
    --alert-high-bg: #fdedec;
    --alert-high-border: #f5b7b1;
    --alert-high-text: #922b21;
    --callout-table-header-bg: #f8f9fa;
    --link: #3498db;
    --skill-link: #2c3e50;
}

/* Auto dark mode (follows OS) unless user has chosen light */
@media (prefers-color-scheme: dark) {
    :root:not(.light) {
        --bg: #1a1a2e;
        --bg-card: #16213e;
        --text: #e0e0e0;
        --text-secondary: #b0b0b0;
        --text-muted: #8a8a9a;
        --heading: #e0e0e0;
        --heading-secondary: #c0c0d0;
        --border: #2a2a4a;
        --border-input: #3a3a5a;
        --shadow: rgba(0, 0, 0, 0.3);
        --header-bg: #0f3460;
        --nav-bg: #1a1a3e;
        --table-header: #1e1e3e;
        --table-header-hover: #2a2a4e;
        --table-row-hover: #1e1e3e;
        --alert-warn-bg: #2a2a1e;
        --alert-warn-border: #5a5a2e;
        --alert-warn-text: #d4c060;
        --alert-high-bg: #2e1a1a;
        --alert-high-border: #5a2a2a;
        --alert-high-text: #e07070;
        --callout-table-header-bg: #1e1e3e;
        --link: #5dade2;
        --skill-link: #e0e0e0;
    }
}

/* Manual dark mode override */
:root.dark {
    --bg: #1a1a2e;
    --bg-card: #16213e;
    --text: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-muted: #8a8a9a;
    --heading: #e0e0e0;
    --heading-secondary: #c0c0d0;
    --border: #2a2a4a;
    --border-input: #3a3a5a;
    --shadow: rgba(0, 0, 0, 0.3);
    --header-bg: #0f3460;
    --nav-bg: #1a1a3e;
    --table-header: #1e1e3e;
    --table-header-hover: #2a2a4e;
    --table-row-hover: #1e1e3e;
    --alert-warn-bg: #2a2a1e;
    --alert-warn-border: #5a5a2e;
    --alert-warn-text: #d4c060;
    --alert-high-bg: #2e1a1a;
    --alert-high-border: #5a2a2a;
    --alert-high-text: #e07070;
    --callout-table-header-bg: #1e1e3e;
    --link: #5dade2;
    --skill-link: #e0e0e0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
}

header {
    background: var(--header-bg);
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(52, 152, 219, 0.15) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 50%, rgba(155, 89, 182, 0.12) 0%, transparent 60%),
        linear-gradient(135deg, var(--header-bg) 0%, #1a2a4a 50%, #2c3e50 100%);
    color: white;
    padding: 3rem 2rem 2.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

header::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        repeating-linear-gradient(
            90deg,
            rgba(255, 255, 255, 0.02) 0px,
            rgba(255, 255, 255, 0.02) 1px,
            transparent 1px,
            transparent 60px
        ),
        repeating-linear-gradient(
            0deg,
            rgba(255, 255, 255, 0.02) 0px,
            rgba(255, 255, 255, 0.02) 1px,
            transparent 1px,
            transparent 60px
        );
    pointer-events: none;
}

header h1 {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    position: relative;
}

header h1::after {
    content: "";
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #3498db, #9b59b6);
    margin: 0.6rem auto 0;
    border-radius: 2px;
}

.subtitle-lead {
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin: 0.5rem auto 0;
    position: relative;
}

.subtitle {
    opacity: 0.7;
    font-size: 0.95rem;
    max-width: 700px;
    margin: 0.35rem auto 0;
    line-height: 1.5;
    position: relative;
}

.header-meta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 1.25rem;
    position: relative;
}

.header-meta .meta-chip {
    font-size: 0.8rem;
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.85);
    letter-spacing: 0.02em;
}

.header-meta a.meta-chip-link {
    text-decoration: none;
    cursor: pointer;
    background: rgba(52, 152, 219, 0.85);
    border-color: rgba(52, 152, 219, 0.9);
    color: #fff;
    font-weight: 600;
    transition: background 0.2s, border-color 0.2s, transform 0.15s;
}

.header-meta a.meta-chip-link:hover {
    background: rgba(41, 128, 185, 0.95);
    border-color: rgba(41, 128, 185, 1);
    transform: translateY(-1px);
}

.nav-wrapper {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--nav-bg);
}

nav {
    background: var(--nav-bg);
    padding: 0.75rem 2rem;
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    align-items: center;
}

nav a {
    color: #ecf0f1;
    text-decoration: none;
    font-weight: 500;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    transition: background 0.2s;
}

nav a:hover {
    background: rgba(255, 255, 255, 0.15);
}

#theme-toggle {
    background: none;
    border: none;
    color: #ecf0f1;
    font-size: 1.15rem;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    cursor: pointer;
    flex-shrink: 0;
    line-height: 1;
    transition: background 0.2s;
}

#theme-toggle:hover {
    background: rgba(255, 255, 255, 0.15);
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

section {
    margin-bottom: 3rem;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--heading);
    border-bottom: 2px solid var(--border);
    padding-bottom: 0.5rem;
}

h3 {
    font-size: 1.2rem;
    margin: 1rem 0 0.75rem;
    color: var(--heading-secondary);
}

main p {
    margin-bottom: 0.75rem;
}

main p:last-child {
    margin-bottom: 0;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 2px 4px var(--shadow);
    border-left: 4px solid #3498db;
}

.stat-card.pass { border-left-color: #2ecc71; }
.stat-card.fail { border-left-color: #e74c3c; }
.stat-card.warn { border-left-color: #f39c12; }
.stat-card.waste { border-left-color: #9b59b6; }
.stat-card.llm { border-left-color: #1abc9c; }
.stat-card.hidden-contam { border-left-color: #f39c12; }
.stat-card.net-neg { border-left-color: #c0392b; }

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--heading);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Charts */
.chart-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.chart-container {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 4px var(--shadow);
    position: relative;
    overflow: hidden;
}

.chart-container.wide {
    margin-bottom: 1.5rem;
}

/* Filters */
.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    align-items: center;
    background: var(--bg-card);
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow);
}

.filters label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filters select, .filters input {
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--border-input);
    border-radius: 4px;
    font-size: 0.9rem;
    background: var(--bg);
    color: var(--text);
}

.filters input {
    width: 200px;
}

.filters button {
    margin-left: auto;
    padding: 0.4rem 1rem;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
}

.filters button:hover {
    background: #2980b9;
}

/* Table key */
.table-key {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    box-shadow: 0 2px 4px var(--shadow);
    margin-bottom: 1rem;
    font-size: 0.85rem;
}

.table-key h4 {
    margin-bottom: 0.5rem;
    color: var(--heading);
    font-size: 0.9rem;
}

.table-key dl {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 0.35rem 1.5rem;
    margin: 0;
}

.table-key dl div {
    display: flex;
    gap: 0.5rem;
    align-items: baseline;
}

.table-key dt {
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    min-width: fit-content;
}

.table-key dd {
    color: var(--text-secondary);
    margin: 0;
}

.table-key a {
    color: var(--link);
}

/* Table */
.table-wrapper {
    overflow-x: auto;
    background: var(--bg-card);
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow);
}

#skills-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

#skills-table th {
    background: var(--table-header);
    padding: 0.75rem;
    text-align: left;
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
    position: sticky;
    top: 0;
    color: var(--text);
}

#skills-table th:hover {
    background: var(--table-header-hover);
}

#skills-table td {
    padding: 0.6rem 0.75rem;
    border-top: 1px solid var(--border);
    color: var(--text);
}

#skills-table tbody tr {
    cursor: pointer;
    transition: background 0.15s;
}

#skills-table tbody tr:hover {
    background: var(--table-row-hover);
}

.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-pass { background: #d4efdf; color: #1e8449; }
.badge-fail { background: #fadbd8; color: #c0392b; }
.badge-high { background: #fadbd8; color: #c0392b; }
.badge-medium { background: #fdebd0; color: #d68910; }
.badge-low { background: #d4efdf; color: #1e8449; }
.badge-net-neg { background: #f5b7b1; color: #922b21; font-size: 0.7rem; }

/* Detail Panel */
.detail-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 450px;
    height: 100vh;
    background: var(--bg-card);
    box-shadow: -4px 0 12px var(--shadow);
    z-index: 200;
    overflow-y: auto;
    padding: 2rem;
    transition: transform 0.3s ease;
}

.detail-panel.hidden {
    transform: translateX(100%);
}

#close-detail {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
}

#detail-content h3 {
    margin-top: 0;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
}

.detail-row .label {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.detail-row .value {
    font-weight: 600;
}

/* High risk cards */
#high-risk-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.risk-card {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 2px 4px var(--shadow);
    border-left: 4px solid #e74c3c;
}

.risk-card h4 {
    margin-bottom: 0.5rem;
    color: var(--heading);
}

.risk-card .risk-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Hidden contamination cards */
#hidden-contamination-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.hidden-card {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 2px 4px var(--shadow);
    border-left: 4px solid #f39c12;
}

.hidden-card h4 {
    margin-bottom: 0.5rem;
    color: var(--heading);
}

.hidden-card .hidden-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.hidden-card .score-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.25rem;
}

.hidden-card .score-bar .bar {
    height: 8px;
    border-radius: 4px;
    flex-shrink: 0;
}

.hidden-card .score-bar .bar-skill { background: #2ecc71; }
.hidden-card .score-bar .bar-ref { background: #f39c12; }
.hidden-card .score-bar .bar-ref.high { background: #e74c3c; }

/* Detail panel hidden contamination alert */
.detail-alert {
    background: var(--alert-warn-bg);
    border: 1px solid var(--alert-warn-border);
    border-radius: 6px;
    padding: 0.75rem;
    margin: 0.75rem 0;
    font-size: 0.85rem;
    color: var(--alert-warn-text);
}

.detail-alert.alert-high {
    background: var(--alert-high-bg);
    border-color: var(--alert-high-border);
    color: var(--alert-high-text);
}

/* Net negative / callout */
.callout-box {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 1.25rem;
    box-shadow: 0 2px 4px var(--shadow);
    border-left: 4px solid #c0392b;
    margin-bottom: 1.5rem;
}

.callout-stats {
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    line-height: 1.8;
}

.callout-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.callout-table th {
    text-align: left;
    padding: 0.4rem 0.75rem;
    background: var(--callout-table-header-bg);
    border-bottom: 2px solid var(--border);
    color: var(--text);
}

.callout-table td {
    padding: 0.35rem 0.75rem;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

#net-negative-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

#net-negative-cards h4:first-child {
    grid-column: 1 / -1;
    color: var(--heading-secondary);
    margin-bottom: 0;
}

.net-neg-card {
    border-left-color: #c0392b;
}

/* GitHub links */
.gh-link {
    display: inline-block;
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--link);
    text-decoration: none;
}

.gh-link:hover {
    text-decoration: underline;
}

.skill-link {
    color: var(--skill-link);
    text-decoration: none;
    font-weight: 700;
}

.skill-link:hover {
    color: var(--link);
    text-decoration: underline;
}

/* Contamination explainer cards */
.contam-explainer-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contam-explainer-card {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    box-shadow: 0 2px 4px var(--shadow);
    border-top: 3px solid var(--heading-secondary);
}

.contam-explainer-card h4 {
    margin-bottom: 0.5rem;
    color: var(--heading);
    font-size: 1rem;
}

.contam-explainer-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* Key Findings */
.key-findings {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 1.5rem 2rem;
    box-shadow: 0 2px 4px var(--shadow);
    border-left: 4px solid var(--heading);
    margin-top: 1.5rem;
}

.key-findings h3 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    color: var(--heading);
}

.key-findings ol {
    padding-left: 1.25rem;
    margin: 0;
}

.key-findings li {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    line-height: 1.5;
}

.key-findings li:last-child {
    margin-bottom: 0;
}

/* Behavioral section */
.behavioral-callout {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    box-shadow: 0 2px 4px var(--shadow);
    border-left: 4px solid #e74c3c;
    margin-bottom: 1.5rem;
}

.behavioral-callout.mitigation {
    border-left-color: #2ecc71;
}

.behavioral-callout h4 {
    margin-bottom: 0.5rem;
    color: var(--heading);
}

.behavioral-callout p {
    font-size: 0.95rem;
    margin: 0;
}

.mechanism-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.mechanism-card {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    box-shadow: 0 2px 4px var(--shadow);
    border-top: 3px solid var(--heading-secondary);
}

.mechanism-card h4 {
    margin-bottom: 0.4rem;
    color: var(--heading);
    font-size: 1rem;
}

.mechanism-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.mechanism-example {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-style: italic;
}

/* Intro context */
.intro-context {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 2rem 0;
}

.intro-context p {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 0.75rem;
    text-align: center;
}

.intro-context p:last-child {
    margin-bottom: 0;
}

/* Practitioner callouts */
.practitioner-callout {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    box-shadow: 0 2px 4px var(--shadow);
    border-left: 4px solid #3498db;
    margin-top: 1.5rem;
}

.practitioner-callout h4 {
    margin-bottom: 0.5rem;
    color: var(--heading);
    font-size: 0.95rem;
}

.practitioner-callout p {
    font-size: 0.9rem;
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

footer a {
    color: var(--link);
}

main a {
    color: var(--link);
}

/* Nav fade overlays — hidden on desktop */
.nav-fade {
    display: none;
}

@media (max-width: 768px) {
    .nav-wrapper {
        position: relative;
    }

    .nav-fade {
        display: block;
        position: absolute;
        top: 0;
        bottom: 0;
        width: 4rem;
        z-index: 10;
        pointer-events: none;
        opacity: 0;
        transition: opacity 0.2s;
    }

    .nav-fade-left {
        left: 0;
        background: linear-gradient(to right, var(--nav-bg) 30%, transparent);
    }

    .nav-fade-right {
        right: 0;
        background: linear-gradient(to left, var(--nav-bg) 30%, transparent);
    }

    .nav-fade.visible {
        opacity: 1;
    }

    nav {
        position: relative;
        z-index: 1;
        background: transparent;
        justify-content: flex-start;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        gap: 1rem;
        padding: 0.75rem 1rem;
    }

    nav::-webkit-scrollbar {
        display: none;
    }

    nav a,
    nav #theme-toggle {
        white-space: nowrap;
        flex-shrink: 0;
    }

    .chart-container {
        min-height: 220px;
    }

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

    .chart-container.extra-tall {
        min-height: 500px;
    }

    .chart-container canvas {
        min-height: inherit;
    }

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

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

    .filters {
        flex-direction: column;
    }

    .detail-panel {
        width: 100%;
    }

    .mechanism-cards,
    .contam-explainer-cards {
        grid-template-columns: 1fr;
    }

    .header-meta {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
}

@media (prefers-color-scheme: dark) {
    :root:not(.light) .badge-pass { background: #1e4d2e; color: #6fcf97; }
    :root:not(.light) .badge-fail { background: #4d1e1e; color: #f5a0a0; }
    :root:not(.light) .badge-high { background: #4d1e1e; color: #f5a0a0; }
    :root:not(.light) .badge-medium { background: #4d3a1e; color: #f0c060; }
    :root:not(.light) .badge-low { background: #1e4d2e; color: #6fcf97; }
    :root:not(.light) .badge-net-neg { background: #4d1e1e; color: #f5a0a0; }
    :root:not(.light) .callout-stats { color: var(--text); }
    :root:not(.light) .detail-row .value { color: var(--text); }
}

.dark .badge-pass { background: #1e4d2e; color: #6fcf97; }
.dark .badge-fail { background: #4d1e1e; color: #f5a0a0; }
.dark .badge-high { background: #4d1e1e; color: #f5a0a0; }
.dark .badge-medium { background: #4d3a1e; color: #f0c060; }
.dark .badge-low { background: #1e4d2e; color: #6fcf97; }
.dark .badge-net-neg { background: #4d1e1e; color: #f5a0a0; }
.dark .callout-stats { color: var(--text); }
.dark .detail-row .value { color: var(--text); }