/* ============================================================
   Borchard Labs - Design System
   Field notebook aesthetic: earth tones, forest greens, ocean blues
   ============================================================ */

:root {
    /* Core palette */
    --ink: #2b2b2b;
    --ink-light: #555;
    --ink-faint: #888;
    --parchment: #faf8f4;
    --parchment-warm: #f3efe7;
    --parchment-dark: #e8e2d6;

    /* Accent colors */
    --forest: #2d6a4f;
    --forest-dark: #1b4332;
    --forest-light: #52b788;
    --ocean: #1d3557;
    --ocean-light: #457b9d;
    --ocean-pale: #a8dadc;
    --rust: #bc4749;
    --gold: #b8860b;
    --bark: #6b4226;

    /* Functional */
    --border: #d4cec4;
    --border-light: #e8e2d6;
    --shadow: rgba(43, 43, 43, 0.08);
    --shadow-md: rgba(43, 43, 43, 0.12);
    --shadow-lg: rgba(43, 43, 43, 0.16);

    /* Typography */
    --font-heading: 'Merriweather', Georgia, serif;
    --font-body: 'Source Sans 3', 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Fira Code', 'Consolas', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --space-xxl: 6rem;

    /* Layout */
    --max-width: 1140px;
    --nav-height: 64px;
    --radius: 6px;
    --radius-lg: 12px;
}


/* ---- Reset & Base ---- */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.65;
    color: var(--ink);
    background: var(--parchment);
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--ocean-light);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--forest);
}

ul, ol {
    list-style: none;
}


/* ---- Typography ---- */

h1, h2, h3, h4, h5 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--ink);
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.25rem); }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }

p + p { margin-top: var(--space-md); }

.text-small { font-size: 0.875rem; }
.text-muted { color: var(--ink-light); }
.text-faint { color: var(--ink-faint); }
.text-center { text-align: center; }

code, .mono {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--parchment-warm);
    padding: 0.15em 0.4em;
    border-radius: 3px;
}


/* ---- Layout ---- */

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section {
    padding: var(--space-xxl) 0;
}

.section-alt {
    background: var(--parchment-warm);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-header h2 {
    margin-bottom: var(--space-sm);
}

.section-header p {
    font-size: 1.15rem;
    color: var(--ink-light);
    max-width: 640px;
    margin: 0 auto;
}

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

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

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-lg);
}


/* ---- Navigation ---- */

.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(250, 248, 244, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}

.site-nav.scrolled {
    box-shadow: 0 2px 12px var(--shadow);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    color: var(--ink);
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--forest);
    color: #fff;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    border-radius: var(--radius);
    letter-spacing: 0.5px;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--ink);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--ink-light);
    text-decoration: none;
    padding: var(--space-xs) 0;
    border-bottom: 2px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--forest);
    border-bottom-color: var(--forest);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--ink);
    border-radius: 1px;
    transition: all 0.3s ease;
}

.nav-toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-nav {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: var(--parchment);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 16px var(--shadow);
    z-index: 999;
}

.mobile-nav.open {
    display: block;
}

.mobile-nav a {
    display: block;
    padding: var(--space-md) var(--space-lg);
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--ink-light);
    border-bottom: 1px solid var(--border-light);
    transition: background 0.2s ease;
}

.mobile-nav a:hover,
.mobile-nav a.active {
    background: var(--parchment-warm);
    color: var(--forest);
}


/* ---- Buttons ---- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
    line-height: 1;
}

.btn-primary {
    background: var(--forest);
    color: #fff;
}

.btn-primary:hover {
    background: var(--forest-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(45, 106, 79, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--forest);
    border: 2px solid var(--forest);
}

.btn-secondary:hover {
    background: var(--forest);
    color: #fff;
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--ocean-light);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    border-color: var(--ocean-light);
    background: rgba(69, 123, 157, 0.05);
}

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 1rem 2.25rem;
    font-size: 1.05rem;
}

.btn:disabled,
.btn-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}


/* ---- Cards ---- */

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px var(--shadow-md);
}

.card-thumb {
    width: 100%;
    aspect-ratio: 16 / 10;
    background: var(--parchment-warm);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-bottom: 1px solid var(--border-light);
}

.card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-thumb .placeholder-icon {
    font-size: 2.5rem;
    opacity: 0.4;
}

.card-body {
    padding: 1.25rem;
}

.card-body h3 {
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
}

.card-body h3 a {
    color: var(--ink);
    text-decoration: none;
}

.card-body h3 a:hover {
    color: var(--forest);
}

.card-body p {
    font-size: 0.9rem;
    color: var(--ink-light);
    line-height: 1.55;
}

.card-footer {
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
}


/* ---- Tags / Badges ---- */

.tag {
    display: inline-block;
    padding: 0.2rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tag-green {
    background: rgba(45, 106, 79, 0.1);
    color: var(--forest);
}

.tag-blue {
    background: rgba(29, 53, 87, 0.1);
    color: var(--ocean);
}

.tag-gold {
    background: rgba(184, 134, 11, 0.1);
    color: var(--gold);
}

.tag-rust {
    background: rgba(188, 71, 73, 0.1);
    color: var(--rust);
}

.tag-bark {
    background: rgba(107, 66, 38, 0.1);
    color: var(--bark);
}

.difficulty {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--ink-faint);
}

.difficulty-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
}

.difficulty-dot.filled {
    background: var(--forest);
}


/* ---- Hero ---- */

.hero {
    padding-top: calc(var(--nav-height) + var(--space-xxl));
    padding-bottom: var(--space-xxl);
    text-align: center;
}

.hero h1 {
    margin-bottom: var(--space-md);
}

.hero .lead {
    font-size: 1.25rem;
    color: var(--ink-light);
    max-width: 680px;
    margin: 0 auto var(--space-lg);
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}


/* ---- Steps / How It Works ---- */

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    counter-reset: step;
}

.step {
    text-align: center;
    counter-increment: step;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--forest);
    color: #fff;
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: var(--space-md);
}

.step h3 {
    margin-bottom: var(--space-sm);
}

.step p {
    font-size: 0.95rem;
    color: var(--ink-light);
}


/* ---- Experiment Detail Page ---- */

.page-header {
    padding-top: calc(var(--nav-height) + var(--space-xl));
    padding-bottom: var(--space-xl);
    background: var(--parchment-warm);
    border-bottom: 1px solid var(--border-light);
}

.page-header .breadcrumb {
    font-size: 0.85rem;
    color: var(--ink-faint);
    margin-bottom: var(--space-md);
}

.page-header .breadcrumb a {
    color: var(--ink-faint);
}

.page-header .breadcrumb a:hover {
    color: var(--forest);
}

.page-header h1 {
    margin-bottom: var(--space-sm);
}

.page-header .tags {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    margin-top: var(--space-md);
}

.experiment-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-xl);
    padding: var(--space-xl) 0;
}

.experiment-sidebar {
    position: sticky;
    top: calc(var(--nav-height) + var(--space-lg));
    align-self: start;
}

.sidebar-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.sidebar-card h4 {
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border-light);
}

.sidebar-card ul {
    list-style: disc;
    padding-left: 1.25rem;
}

.sidebar-card li {
    font-size: 0.9rem;
    color: var(--ink-light);
    margin-bottom: var(--space-sm);
    line-height: 1.5;
}

.sidebar-card + .sidebar-card {
    margin-top: var(--space-md);
}

.experiment-body h2 {
    font-size: 1.4rem;
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--border-light);
}

.experiment-body h2:first-child {
    margin-top: 0;
}

.experiment-body p {
    margin-bottom: var(--space-md);
    color: var(--ink-light);
}

.experiment-body ul, .experiment-body ol {
    padding-left: 1.5rem;
    margin-bottom: var(--space-md);
}

.experiment-body ul { list-style: disc; }
.experiment-body ol { list-style: decimal; }

.experiment-body li {
    margin-bottom: var(--space-sm);
    color: var(--ink-light);
    line-height: 1.6;
}


/* ---- Catalog Filters ---- */

.filter-bar {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-light);
}

.filter-btn {
    padding: 0.45rem 1rem;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    background: transparent;
    color: var(--ink-light);
    border: 1px solid var(--border);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--forest);
    color: #fff;
    border-color: var(--forest);
}


/* ---- Feature Grid (landing page) ---- */

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.feature {
    padding: var(--space-lg);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px var(--shadow);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
}

.feature h3 {
    margin-bottom: var(--space-sm);
}

.feature p {
    font-size: 0.9rem;
    color: var(--ink-light);
}


/* ---- Audience Section ---- */

.audience-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.audience-item {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
    padding: var(--space-lg);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.audience-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(45, 106, 79, 0.08);
    border-radius: var(--radius);
}

.audience-item h4 {
    margin-bottom: var(--space-xs);
}

.audience-item p {
    font-size: 0.9rem;
    color: var(--ink-light);
}


/* ---- Footer ---- */

.site-footer {
    background: var(--ocean);
    color: rgba(255, 255, 255, 0.85);
    padding: var(--space-xl) 0 var(--space-lg);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-brand {
    max-width: 320px;
}

.footer-brand .logo-mark {
    margin-bottom: var(--space-md);
}

.footer-brand p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: var(--space-xl);
}

.footer-col h4 {
    color: #fff;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-md);
}

.footer-col a {
    display: block;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: var(--space-sm);
    transition: color 0.2s ease;
}

.footer-col a:hover {
    color: #fff;
}

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}


/* ---- About Page ---- */

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

.about-grid .about-text h2 {
    margin-bottom: var(--space-md);
}

.about-grid .about-text p {
    color: var(--ink-light);
    margin-bottom: var(--space-md);
}

.about-photo {
    aspect-ratio: 4 / 3;
    background: var(--parchment-warm);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ink-faint);
    font-size: 0.9rem;
}


/* ---- Publications Placeholder ---- */

.placeholder-notice {
    text-align: center;
    padding: var(--space-xl);
    background: #fff;
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    max-width: 640px;
    margin: 0 auto;
}

.placeholder-notice h3 {
    margin-bottom: var(--space-md);
    color: var(--forest);
}

.placeholder-notice p {
    color: var(--ink-light);
    font-size: 0.95rem;
}


/* ---- Resources Page ---- */

.resource-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.resource-item {
    padding: 1.5rem;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.resource-item h3 {
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
}

.resource-item p {
    font-size: 0.9rem;
    color: var(--ink-light);
    margin-bottom: var(--space-md);
}


/* ---- Utility ---- */

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}


/* ---- Responsive ---- */

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

    .experiment-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding-top: calc(var(--nav-height) + var(--space-xl));
        padding-bottom: var(--space-xl);
    }

    .hero h1 {
        font-size: clamp(1.75rem, 6vw, 2.5rem);
    }

    .steps {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

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

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

    .footer-content {
        flex-direction: column;
        gap: var(--space-lg);
    }

    .footer-links {
        gap: var(--space-lg);
    }

    .section {
        padding: var(--space-xl) 0;
    }

    .container {
        padding: 0 var(--space-md);
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-lg {
        width: 100%;
    }

    .filter-bar {
        gap: var(--space-xs);
    }
}


/* ---- Simulation Engine ---- */

.sim-container {
    margin-top: var(--space-xl);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: #fff;
    overflow: hidden;
}

.sim-canvas {
    display: block;
    width: 100%;
    background: var(--parchment);
    border-bottom: 1px solid var(--border-light);
}

/* HUD */
.sim-hud {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-light);
    background: var(--parchment-warm);
}

.sim-transport {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
    margin-bottom: var(--space-sm);
}

.sim-speed-group {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-left: auto;
}

.sim-speed-slider {
    width: 90px;
    cursor: pointer;
    accent-color: var(--forest);
}

.sim-speed-label {
    font-size: 0.8rem;
    color: var(--ink-faint);
    min-width: 2.5em;
}

.sim-status {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
}

.sim-generation {
    font-size: 0.85rem;
    color: var(--ink-light);
}

.sim-state-indicator {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.15rem 0.6rem;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sim-state-setup {
    background: rgba(184, 134, 11, 0.1);
    color: var(--gold);
}

.sim-state-running {
    background: rgba(45, 106, 79, 0.1);
    color: var(--forest);
}

.sim-state-paused {
    background: rgba(69, 123, 157, 0.1);
    color: var(--ocean-light);
}

.sim-state-complete {
    background: rgba(107, 66, 38, 0.1);
    color: var(--bark);
}

/* Stats panel */
.sim-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs) var(--space-lg);
    margin: 0;
    padding: 0;
}

.sim-stats dt {
    font-size: 0.75rem;
    color: var(--ink-faint);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    float: left;
    clear: left;
    margin-right: var(--space-xs);
}

.sim-stats dd {
    font-size: 0.85rem;
    margin: 0;
}

/* Make stats display as inline pairs */
.sim-stats {
    display: grid;
    grid-template-columns: auto auto;
    gap: var(--space-xs) var(--space-sm);
    width: fit-content;
}

/* Data Collector */
.data-collector {
    border-top: 1px solid var(--border-light);
}

.data-collector-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-lg);
    background: var(--parchment-warm);
    border-bottom: 1px solid var(--border-light);
}

.data-collector-count {
    font-size: 0.85rem;
    color: var(--ink-light);
    margin-right: auto;
}

.data-table-wrap {
    overflow-x: auto;
    overflow-y: auto;
    max-height: 300px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.data-table thead {
    position: sticky;
    top: 0;
    z-index: 1;
}

.data-table th {
    background: var(--ocean);
    color: #fff;
    padding: 0.4rem 0.75rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    white-space: nowrap;
}

.data-table td {
    padding: 0.35rem 0.75rem;
    border-bottom: 1px solid var(--border-light);
    white-space: nowrap;
    color: var(--ink-light);
}

.data-table tbody tr:nth-child(even) {
    background: var(--parchment-warm);
}

.data-table tbody tr:hover {
    background: rgba(45, 106, 79, 0.05);
}

/* Config Screen */
.config-screen {
    padding: var(--space-lg);
    max-width: 560px;
}

.config-screen h3 {
    margin-bottom: var(--space-lg);
    font-size: 1.2rem;
}

.config-param {
    margin-bottom: var(--space-md);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-sm);
}

.config-param[data-param] > .config-label {
    min-width: 180px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--ink);
}

.config-param-dependent {
    padding-left: var(--space-lg);
    border-left: 2px solid var(--border-light);
}

.config-param-disabled {
    opacity: 0.4;
    pointer-events: none;
}

.config-checkbox {
    width: 18px;
    height: 18px;
    accent-color: var(--forest);
    cursor: pointer;
}

.config-range-row {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex: 1;
}

.config-range {
    flex: 1;
    min-width: 120px;
    cursor: pointer;
    accent-color: var(--forest);
}

.config-range-value {
    font-size: 0.8rem;
    color: var(--ink-light);
    min-width: 3.5em;
    text-align: right;
}

.config-number, .config-select {
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    background: #fff;
    color: var(--ink);
    width: 100px;
}

.config-number:focus, .config-select:focus, .config-range:focus {
    outline: 2px solid var(--ocean-pale);
    outline-offset: 1px;
}

.config-description {
    width: 100%;
    margin-top: 0;
    margin-bottom: 0;
    padding-left: 0;
}

.config-screen > .btn {
    margin-top: var(--space-lg);
    width: 100%;
}

/* Simulation responsive */
@media (max-width: 768px) {
    .sim-hud {
        padding: var(--space-sm) var(--space-md);
    }

    .sim-transport {
        gap: var(--space-xs);
    }

    .sim-speed-group {
        margin-left: 0;
        width: 100%;
    }

    .data-collector-header {
        flex-wrap: wrap;
        padding: var(--space-sm) var(--space-md);
    }

    .config-screen {
        padding: var(--space-md);
    }

    .config-param[data-param] > .config-label {
        min-width: auto;
        width: 100%;
    }

    .config-param-dependent {
        padding-left: var(--space-md);
    }
}