/* Simulation Page — Dark Mode, Orange Accent Design System */

:root {
    /* Colors — from docs/design/design-system.md */
    --orange-500: #FF6B2B;
    --orange-400: #FF8F5C;
    --orange-300: #FFB899;
    --orange-900: #CC4400;

    --dark-bg: #0F0F0F;
    --dark-surface: #1A1A1A;
    --dark-elevated: #242424;
    --dark-border: #2E2E2E;
    --dark-text-1: #EDEDEF;
    --dark-text-2: #A3A3A3;
    --dark-text-3: #737373;

    --success: #22C55E;

    /* Typography */
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 16px;
    --space-4: 24px;
    --space-5: 32px;
    --space-6: 48px;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
}

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

body {
    font-family: var(--font);
    background: var(--dark-bg);
    color: var(--dark-text-1);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0, 0, 0, 0); border: 0;
}

/* Nav */
.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    max-width: 1080px;
    margin: 0 auto;
}

.nav-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--orange-500);
    text-decoration: none;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--orange-500);
    border-radius: var(--radius-sm);
}

.nav-links {
    display: flex;
    gap: var(--space-4);
}

.nav-links a {
    color: var(--dark-text-2);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 150ms ease;
}

.nav-links a:hover { color: var(--dark-text-1); }

/* Hero */
.hero {
    text-align: center;
    padding: var(--space-6) var(--space-4);
    max-width: 800px;
    margin: 0 auto;
}

.hero-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--orange-500);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: var(--space-3);
}

.hero-title {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: var(--space-3);
}

.hero-subtitle {
    font-size: 16px;
    color: var(--dark-text-2);
    line-height: 1.6;
}

/* Sections */
.section {
    max-width: 1080px;
    margin: 0 auto;
    padding: var(--space-5) var(--space-4);
}

.section-title {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.03em;
    text-align: center;
    margin-bottom: var(--space-2);
}

.section-subtitle {
    font-size: 15px;
    color: var(--dark-text-2);
    text-align: center;
    margin-bottom: var(--space-5);
}

/* Race Section */
.race-container {
    max-width: 800px;
    margin: 0 auto;
}

.race-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.race-card {
    background: var(--dark-surface);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    transition: border-color 150ms ease;
}

.race-card--pursuit { border-color: var(--orange-500); }
.race-card--traditional { border-color: var(--dark-text-3); }

.race-card__header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}

.race-card__badge {
    font-size: 12px;
    font-weight: 600;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    letter-spacing: 0.02em;
}

.race-card__badge--pursuit {
    background: var(--orange-500);
    color: #000;
}

.race-card__badge--traditional {
    background: var(--dark-text-3);
    color: var(--dark-bg);
}

.race-card__label {
    font-size: 12px;
    color: var(--dark-text-3);
}

.race-card__stats {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.race-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
}

.race-stat__value {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.race-card--pursuit .race-stat__value { color: var(--orange-500); }
.race-card--traditional .race-stat__value { color: var(--dark-text-2); }

.race-stat__label {
    font-size: 12px;
    color: var(--dark-text-3);
    text-align: center;
}

/* Retention Ring */
.retention-ring {
    position: relative;
    width: 80px;
    height: 80px;
}

.retention-ring svg {
    transform: rotate(-90deg);
}

.retention-ring__bg {
    fill: none;
    stroke: var(--dark-border);
    stroke-width: 4;
}

.retention-ring__fill {
    fill: none;
    stroke-width: 4;
    stroke-dasharray: 219.91;
    stroke-dashoffset: 219.91;
    stroke-linecap: round;
    transition: stroke-dashoffset 300ms ease;
}

.retention-ring__fill--pursuit { stroke: var(--orange-500); }
.retention-ring__fill--traditional { stroke: var(--dark-text-3); }

.retention-ring__text {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

/* Race Callout */
.race-callout {
    text-align: center;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-3);
    font-size: 14px;
    font-weight: 500;
    color: var(--dark-text-2);
    background: var(--dark-elevated);
    border-radius: var(--radius-sm);
    opacity: 0;
    transition: opacity 200ms ease;
}

.race-callout.visible { opacity: 1; }

/* Race Controls */
.race-controls {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.race-play {
    width: 40px;
    height: 40px;
    border: 1px solid var(--dark-border);
    border-radius: 50%;
    background: var(--dark-surface);
    color: var(--dark-text-1);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: border-color 150ms ease;
}

.race-play:hover { border-color: var(--orange-500); }

.race-scrubber-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.race-scrubber {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: var(--dark-border);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.race-scrubber::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--orange-500);
    cursor: pointer;
    border: 2px solid var(--dark-bg);
}

.race-scrubber::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--orange-500);
    cursor: pointer;
    border: 2px solid var(--dark-bg);
}

.race-scrubber__labels {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--dark-text-3);
}

.race-day {
    font-size: 14px;
    font-weight: 600;
    color: var(--dark-text-2);
    font-variant-numeric: tabular-nums;
    min-width: 60px;
    text-align: right;
    flex-shrink: 0;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.chart-card {
    background: var(--dark-surface);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
}

.chart-card__title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.chart-card__desc {
    font-size: 13px;
    color: var(--dark-text-3);
    margin-bottom: var(--space-3);
}

.chart-card__canvas {
    position: relative;
    height: 240px;
}

.chart-card__canvas canvas {
    width: 100% !important;
    height: 100% !important;
}

/* Stat Cards */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

.stat-card {
    background: var(--dark-surface);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    text-align: center;
}

.stat-card__value {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--orange-500);
    letter-spacing: -0.03em;
    margin-bottom: var(--space-1);
    font-variant-numeric: tabular-nums;
}

.stat-card__label {
    font-size: 13px;
    color: var(--dark-text-2);
    line-height: 1.4;
}

/* Sources */
.sources {
    max-width: 700px;
    margin: 0 auto;
    padding: var(--space-4);
    border-top: 1px solid var(--dark-border);
}

.sources__title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--dark-text-2);
}

.sources__text {
    font-size: 13px;
    color: var(--dark-text-3);
    line-height: 1.6;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title { font-size: 28px; }

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

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

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

    .race-stat__value { font-size: 36px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 22px; }
    .section-title { font-size: 22px; }
    .race-card__stats { flex-direction: column; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}