/* === GENPATSU.QUEST - Nuclear Risk Simulator === */

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

:root {
    --bg-primary: #1a1a3e;
    --bg-secondary: #0f1628;
    --card-surface: #232848;
    --text-primary: #d4d4e0;
    --text-secondary: #8888a8;
    --safe: #1a6b4a;
    --caution: #c4922a;
    --critical: #8b1a2b;
    --sapphire: #2a5caa;
    --border: #3a3a5e;
    --card-hover: #2a2f52;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Source Serif 4', serif;
    font-weight: 400;
    font-size: 18px;
    line-height: 1.7;
    overflow-x: hidden;
    /* Subtle hexagonal background pattern */
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='52' viewBox='0 0 60 52' xmlns='http://www.w3.org/2000/svg'%3E%3Cpolygon points='30,2 55,14.5 55,37.5 30,50 5,37.5 5,14.5' fill='none' stroke='%233a3a5e' stroke-width='0.5' opacity='0.02'/%3E%3C/svg%3E");
}

/* === SIDEBAR NAVIGATION === */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 56px;
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 28px;
    z-index: 100;
}

.nav-icon {
    color: var(--text-secondary);
    transition: color 0.4s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
}

.nav-icon:hover {
    color: var(--sapphire);
}

/* === PANELS === */
.panel {
    min-height: 100vh;
    padding-left: 56px;
    padding-right: 40px;
    padding-top: 80px;
    padding-bottom: 80px;
}

/* === FADE-IN ANIMATION === */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === SECTION 1: OPENING === */
.opening-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--bg-primary);
}

.opening-content {
    max-width: 680px;
}

.opening-title {
    font-family: 'Shippori Mincho', serif;
    font-weight: 800;
    font-size: 2.4rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.3;
    margin-bottom: 12px;
}

.opening-subtitle {
    font-family: 'Source Serif 4', serif;
    font-weight: 400;
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.divider {
    border: none;
    border-top: 1px solid var(--border);
    width: 120px;
    margin: 24px auto;
}

.opening-mission {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

.en-sub {
    font-size: 0.85rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

.begin-prompt {
    display: inline-block;
    font-family: 'DM Mono', monospace;
    font-size: 0.85rem;
    color: var(--sapphire);
    text-decoration: none;
    border: 1px solid var(--sapphire);
    padding: 12px 28px;
    letter-spacing: 0.05em;
    transition: background 0.4s, color 0.4s;
}

.begin-prompt:hover {
    background: var(--sapphire);
    color: var(--text-primary);
}

/* === SECTION 2: CONTEXT GRID === */
.context-panel {
    background: var(--bg-secondary);
    padding-left: 96px;
}

.section-title {
    font-family: 'Shippori Mincho', serif;
    font-weight: 600;
    font-size: 1.6rem;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 6px;
}

.section-subtitle {
    font-family: 'Source Serif 4', serif;
    font-weight: 400;
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 48px;
}

.context-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
}

/* === CARDS === */
.context-card,
.archive-card {
    background: var(--card-surface);
    border: 1px solid var(--border);
    transition: border-color 0.4s ease, background-color 0.4s ease;
    overflow: hidden;
}

.context-card:hover,
.archive-card:hover {
    border-color: var(--sapphire);
    background-color: var(--card-hover);
}

.card-header {
    height: 140px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--text-secondary) 100%);
    opacity: 0.6;
}

.card-body {
    padding: 24px;
}

.card-title {
    font-family: 'Shippori Mincho', serif;
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.card-subtitle {
    font-family: 'Source Serif 4', serif;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.card-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* === SECTION 3: SIMULATOR === */
.simulator-panel {
    background: var(--bg-primary);
    padding-left: 96px;
}

.simulator-layout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto 48px;
}

.param-column {
    display: flex;
    flex-direction: column;
    gap: 24px;
    width: 200px;
}

.param-panel {
    background: var(--card-surface);
    border: 1px solid var(--border);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.param-label {
    font-family: 'Source Serif 4', serif;
    font-size: 0.75rem;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

.param-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: var(--border);
    outline: none;
    border-radius: 0;
}

.param-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--sapphire);
    border-radius: 50%;
    cursor: pointer;
}

.param-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--sapphire);
    border-radius: 50%;
    border: none;
    cursor: pointer;
}

.param-value {
    font-family: 'DM Mono', monospace;
    font-size: 1.1em;
    color: var(--text-primary);
    letter-spacing: 0.05em;
}

.param-unit {
    font-family: 'DM Mono', monospace;
    font-size: 0.8em;
    color: var(--text-secondary);
    margin-left: 4px;
}

/* Reactor Schematic */
.reactor-display {
    width: 300px;
    height: 300px;
    flex-shrink: 0;
}

.reactor-schematic {
    width: 100%;
    height: 100%;
}

.schematic-label {
    font-family: 'DM Mono', monospace;
    font-size: 10px;
    fill: var(--text-secondary);
    letter-spacing: 0.05em;
}

.control-rod {
    transition: transform 0.8s ease-in-out;
}

.coolant-flow {
    animation: flowAnimation 3s linear infinite;
}

@keyframes flowAnimation {
    0% { stroke-dashoffset: 0; }
    100% { stroke-dashoffset: -20; }
}

/* Risk Assessment Grid */
.risk-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.risk-cell {
    background: var(--card-surface);
    border: 1px solid var(--border);
    padding: 20px;
    text-align: center;
    transition: border-color 0.8s ease-in-out;
}

.risk-label {
    display: block;
    font-family: 'Source Serif 4', serif;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.risk-value {
    display: block;
    font-family: 'DM Mono', monospace;
    font-size: 1.1em;
    color: var(--text-primary);
    letter-spacing: 0.05em;
    margin-bottom: 12px;
    transition: color 0.8s ease-in-out;
}

.risk-indicator {
    height: 4px;
    width: 100%;
    background: var(--safe);
    transition: background-color 0.8s ease-in-out;
}

/* === SECTION 4: ARCHIVE === */
.archive-panel {
    background: var(--bg-secondary);
    padding-left: 96px;
}

.archive-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.archive-date {
    font-family: 'DM Mono', monospace;
    font-size: 0.85rem;
    color: var(--sapphire);
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: 8px;
}

/* === SECTION 5: CLOSING === */
.closing-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    text-align: center;
    padding-left: 96px;
}

.closing-content {
    max-width: 600px;
}

.closing-title {
    font-family: 'Shippori Mincho', serif;
    font-weight: 600;
    font-size: 1.6rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.closing-subtitle {
    font-family: 'Source Serif 4', serif;
    font-size: 1rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 24px;
}

.closing-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 60px;
}

.site-footer {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.footer-domain {
    font-family: 'DM Mono', monospace;
    font-size: 0.85rem;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

.footer-note {
    font-size: 0.7rem;
    color: var(--text-secondary);
    opacity: 0.5;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: 48px;
        flex-direction: row;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    .panel {
        padding-left: 16px;
        padding-right: 16px;
        padding-top: 68px;
    }

    .context-panel,
    .simulator-panel,
    .archive-panel,
    .closing-panel {
        padding-left: 16px;
    }

    .opening-title {
        font-size: 1.8rem;
    }

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

    .simulator-layout {
        flex-direction: column;
    }

    .param-column {
        width: 100%;
        flex-direction: row;
    }

    .param-panel {
        flex: 1;
    }

    .reactor-display {
        width: 240px;
        height: 240px;
    }

    .risk-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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