:root {
            --header-bg: #1a1f2e;
            --header-text: #ffffff;
            --bg-primary: #ffffff;
            --bg-secondary: #f8f9fa;
            --bg-card: #ffffff;
            --text-primary: #1a202c;
            --text-secondary: #4a5568;
            --text-muted: #718096;
            --accent-teal: #2b6cb0;
            --accent-coral: #996060;
            --accent-warm: #c05621;
            --accent-green: #2f855a;
            --border: #e2e8f0;
            --shadow: 0 1px 3px rgba(0,0,0,0.08);
            --coral-critical: #d90429;
            --coral-severe: #ef476f;
            --coral-moderate: #f4845f;
            --coral-low: #ffd166;
        }

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

        body {
            font-family: 'DM Sans', 'Noto Sans JP', sans-serif;
            background: var(--bg-secondary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
        }

        body.ja {
            font-family: 'Noto Sans JP', 'DM Sans', sans-serif;
        }

        /* Language toggle CSS - same as sst.html */
        [data-lang="ja"] { display: none; }
        body.ja [data-lang="en"] { display: none; }
        body.ja [data-lang="ja"] { display: inline; }
        div[data-lang="ja"], li[data-lang="ja"], p[data-lang="ja"], span.block[data-lang="ja"], h1[data-lang="ja"], h2[data-lang="ja"], h3[data-lang="ja"], h4[data-lang="ja"] { display: none; }
        body.ja div[data-lang="en"], body.ja li[data-lang="en"], body.ja p[data-lang="en"], body.ja span.block[data-lang="en"], body.ja h1[data-lang="en"], body.ja h2[data-lang="en"], body.ja h3[data-lang="en"], body.ja h4[data-lang="en"] { display: none; }
        body.ja div[data-lang="ja"] { display: block; }
        body.ja li[data-lang="ja"] { display: list-item; }
        body.ja p[data-lang="ja"] { display: block; }
        body.ja span.block[data-lang="ja"] { display: block; }
        body.ja h1[data-lang="ja"], body.ja h2[data-lang="ja"], body.ja h3[data-lang="ja"], body.ja h4[data-lang="ja"] { display: block; }

        /* Header */
        header {
            background: var(--header-bg);
            color: var(--header-text);
            padding: 0.75rem 2rem;
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: flex-start;
            align-items: center;
        }

        .logo {
            margin-right: 2rem;
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            text-decoration: none;
            color: inherit;
        }

        .logo-icon {
            width: 28px;
            height: 28px;
            background: linear-gradient(135deg, #5b9a94 0%, #2b6cb0 100%);
            border-radius: 6px;
            overflow: hidden;
        }

        .logo-icon img { width: 100%; height: 100%; object-fit: cover; }

        .nav-links {
            display: flex;
            gap: 1.5rem;
            list-style: none;
        }

        .nav-links a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 500;
            transition: color 0.2s;
        }

        .nav-links a:hover, .nav-links a.active {
            color: #ffffff;
        }

        .header-controls {
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .lang-switch {
            display: flex;
            gap: 0.25rem;
        }

        .lang-switch button {
            background: none;
            border: none;
            color: rgba(255,255,255,0.6);
            font-size: 0.8rem;
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
        }

        .lang-switch button:hover { color: rgba(255,255,255,0.9); }
        .lang-switch button.active { color: #ffffff; background: rgba(255,255,255,0.15); }

        /* Main */
        main {
            max-width: 900px;
            margin: 0 auto;
            padding: 2.5rem 2rem;
        }

        .breadcrumb {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }

        .breadcrumb a {
            color: var(--accent-teal);
            text-decoration: none;
        }

        /* Hero Section with Map */
        .hero-section {
            background: linear-gradient(135deg, rgba(26, 31, 46, 0.95), rgba(26, 58, 92, 0.9)), url("../img/iStock-964888346.jpg");
            color: white;
            border-radius: 12px;
            margin-bottom: 2.5rem;
            overflow: hidden;
            background-size: cover;
            background-position: center;
        }

        .hero-header {
            padding: 2rem 2rem 1rem;
            text-align: center;
        }

        .hero-tagline {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        body.ja .hero-tagline {
            font-size: 1.4rem;
        }

        .hero-subtitle {
            font-size: 0.95rem;
            opacity: 0.85;
        }

        /* Map Container */
        .map-container {
            position: relative;
            width: 100%;
        }

        .map-image {
            width: 100%;
            height: auto;
            display: block;
        }

        .hotspots-layer {
            position: absolute;
            inset: 0;
            pointer-events: none;
        }

        .hotspot {
            position: absolute;
            pointer-events: auto;
            cursor: pointer;
            transition: transform 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hotspot:hover {
            transform: scale(1.3);
            z-index: 10;
        }

        .hotspot-glow {
            position: absolute;
            border-radius: 50%;
            animation: pulse 3s ease-in-out infinite;
        }

        .hotspot-core {
            position: relative;
            border-radius: 50%;
        }

        @keyframes pulse {
            0%, 100% { opacity: 0.4; transform: scale(1); }
            50% { opacity: 0.6; transform: scale(1.15); }
        }

        .hotspot-tooltip {
            position: absolute;
            bottom: 100%;
            left: 50%;
            transform: translateX(-50%);
            background: rgba(10, 22, 40, 0.95);
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: 8px;
            padding: 0.75rem 1rem;
            min-width: 180px;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.2s, transform 0.2s;
            margin-bottom: 10px;
            z-index: 20;
            text-align: left;
            color: white;
        }

        .hotspot:hover .hotspot-tooltip {
            opacity: 1;
            transform: translateX(-50%) translateY(-5px);
        }

        .hotspot-tooltip h4 {
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 0.3rem;
        }

        .hotspot-tooltip p {
            font-size: 0.55rem;
            color: rgba(255,255,255,0.7);
            line-height: 1.4;
        }

        .hotspot-tooltip .year {
            font-size: 0.7rem;
            color: var(--coral-severe);
            margin-top: 0.3rem;
        }

        .severity-critical .hotspot-glow { background: var(--coral-critical); }
        .severity-critical .hotspot-core { background: var(--coral-critical); }
        .severity-severe .hotspot-glow { background: var(--coral-severe); }
        .severity-severe .hotspot-core { background: var(--coral-severe); }
        .severity-moderate .hotspot-glow { background: var(--coral-moderate); }
        .severity-moderate .hotspot-core { background: var(--coral-moderate); }
        .severity-low .hotspot-glow { background: var(--coral-low); }
        .severity-low .hotspot-core { background: var(--coral-low); }

        .map-legend {
            position: absolute;
            bottom: 15px;
            left: 15px;
            background: rgba(10, 22, 40, 0.85);
            border-radius: 8px;
            padding: 0.75rem 1rem;
        }

        .map-legend h5 {
            font-size: 0.7rem;
            font-weight: 500;
            margin-bottom: 0.5rem;
            color: white;
        }

        .legend-items {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0.4rem 0.75rem;
        }

        .legend-item {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.55rem;
            color: rgba(255,255,255,0.8);
        }

        .legend-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
        }

        .legend-dot.critical { background: var(--coral-critical); }
        .legend-dot.severe { background: var(--coral-severe); }
        .legend-dot.moderate { background: var(--coral-moderate); }
        .legend-dot.low { background: var(--coral-low); }

        .data-source {
            position: absolute;
            bottom: 15px;
            right: 15px;
            font-size: 0.5rem;
            color: rgba(255,255,255,0.4);
        }

        /* Content Sections */
        .content-section {
            margin-bottom: 2.5rem;
        }

        .content-section h2 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 1.5rem;
            box-shadow: var(--shadow);
        }

        /* Introduction */
        .intro-text {
            font-size: 0.95rem;
            line-height: 1.8;
            color: var(--text-secondary);
        }

        .intro-text p {
            margin-bottom: 1rem;
        }

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

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

        @media (max-width: 640px) {
            .key-stats {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        .key-stat {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 1.25rem;
            text-align: center;
        }

        .key-stat-value {
            font-family: 'JetBrains Mono', monospace;
            font-size: 1.75rem;
            font-weight: 500;
            color: var(--coral-severe);
        }

        .key-stat-label {
            font-size: 0.55rem;
            color: var(--text-muted);
            margin-top: 0.25rem;
        }

        /* Timeline */
        .timeline-visual {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            padding: 1.5rem 0;
            position: relative;
            margin-bottom: 1.5rem;
        }

        .timeline-visual::before {
            content: '';
            position: absolute;
            top: 2rem;
            left: 5%;
            right: 5%;
            height: 3px;
            background: var(--border);
        }

        .timeline-point {
            text-align: center;
            position: relative;
            z-index: 1;
            cursor: pointer;
            flex: 1;
        }

        .timeline-dot {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            margin: 0 auto 0.75rem;
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .timeline-point:hover .timeline-dot {
            transform: scale(1.2);
        }

        .timeline-dot.active {
            box-shadow: 0 0 0 4px rgba(217, 4, 41, 0.3);
            animation: dotPulse 2s ease-in-out infinite;
        }

        @keyframes dotPulse {
            0%, 100% { box-shadow: 0 0 0 4px rgba(217, 4, 41, 0.3); }
            50% { box-shadow: 0 0 0 8px rgba(217, 4, 41, 0.1); }
        }

        .timeline-year {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .timeline-label {
            font-size: 0.55rem;
            color: var(--text-muted);
        }

        .timeline-status {
            font-size: 0.7rem;
            color: var(--coral-critical);
            margin-top: 0.25rem;
        }

        /* Event Cards */
        .event-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            margin-bottom: 1rem;
            overflow: hidden;
            transition: box-shadow 0.3s;
        }

        .event-card:hover {
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
        }

        .event-card-header {
            padding: 1.25rem 1.5rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--bg-secondary);
        }

        .event-card-title {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .event-card-title .dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            flex-shrink: 0;
        }

        .event-card-title h3 {
            font-size: 1rem;
            font-weight: 600;
        }

        .event-card-title .impact {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-left: 0.5rem;
        }

        .event-card-toggle {
            display: inline-block;
            font-size: 1rem;
            color: var(--text-muted);
            transition: transform 0.3s;
        }

        .event-card.open .event-card-toggle {
            display: inline-block;
            transform: rotate(180deg);
        }

        .event-card-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .event-card.open .event-card-content {
            max-height: 1500px;
        }

        .event-card-body {
            padding: 1.5rem;
        }

        .event-description {
            font-size: 0.9rem;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
        }

        .event-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        @media (max-width: 640px) {
            .event-stats {
                grid-template-columns: 1fr;
            }
        }

        .event-stat {
            text-align: center;
            padding: 1rem;
            background: var(--bg-secondary);
            border-radius: 8px;
        }

        .event-stat-value {
            font-family: 'JetBrains Mono', monospace;
            font-size: 1.5rem;
            font-weight: 500;
            color: var(--coral-severe);
        }

        .event-stat-label {
            font-size: 0.7rem;
            color: var(--text-muted);
            margin-top: 0.25rem;
        }

        .event-details-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }

        @media (max-width: 640px) {
            .event-details-grid {
                grid-template-columns: 1fr;
            }
        }

        .event-detail-section h4 {
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }

        .event-detail-section ul {
            list-style: none;
        }

        .event-detail-section li {
            font-size: 0.85rem;
            color: var(--text-secondary);
            padding: 0.4rem 0;
            border-bottom: 1px solid var(--border);
        }

        .event-detail-section li:last-child {
            border-bottom: none;
        }

        /* Frequency Chart */
        .frequency-note {
            background: #fef2f2;
            border: 1px solid #fecaca;
            border-radius: 8px;
            padding: 1rem 1.25rem;
            margin-top: 1.5rem;
        }

        .frequency-note-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--coral-critical);
            margin-bottom: 0.5rem;
        }

        .frequency-note p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Hope Section */
        .hope-section {
            background: linear-gradient(135deg, #f0fdf4, #ecfdf5);
            border: 1px solid #a7f3d0;
            border-radius: 8px;
            padding: 1.5rem;
        }

        .hope-section h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--accent-green);
            margin-bottom: 1rem;
        }

        .hope-items {
            display: grid;
            gap: 0.75rem;
        }

        .hope-item {
            display: flex;
            gap: 0.75rem;
            align-items: flex-start;
        }

        .hope-icon {
            font-size: 1rem;
            flex-shrink: 0;
        }

        .hope-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Source Info */
        .source-info {
            font-size: 0.8rem;
            color: var(--text-muted);
            padding: 1.25rem;
            background: var(--bg-secondary);
            border-radius: 6px;
            line-height: 1.8;
        }
        .source-info a { color: var(--accent-teal); text-decoration: none; }
        .source-info a:hover { text-decoration: underline; }
        .source-info ul { margin-top: 0.75rem; padding-left: 1.25rem; }
        .source-info li { margin-bottom: 0.5rem; }

        /* Footer */
        footer {
            max-width: 900px;
            margin: 0 auto;
            padding: 2rem;
            text-align: center;
            font-size: 0.55rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
        }

        footer a {
            color: var(--accent-teal);
            text-decoration: none;
        }

        footer a:hover {
            text-decoration: underline;
        }

        /* Responsive */
        @media (max-width: 768px) {
            main {
                padding: 1.5rem 1rem;
            }

            .hero-header {
                padding: 1.5rem 1rem 0.75rem;
            }

            .hero-tagline {
                font-size: 1.25rem;
            }

            .map-legend {
                position: absolute;
                bottom: 8px;
                left: 8px;
                font-size: 0.5rem; padding: 0.5rem 0.6rem;
                border-radius: 6px;
            }
        }

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

        .event-card-toggle-wrapper {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        /* Desktop/Mobile visibility toggle */
        .mobile-only {
            display: none;
        }


        @media (max-width: 768px) {
            .desktop-only {
                display: none !important;
            }
            .mobile-only {
                display: block;
            }
            /* Mobile legend styling - horizontal inline */
            .map-legend.mobile-only {
                position: static;
                background: transparent;
                padding: 0.5rem 0;
                margin: 0.5rem 0 0 0;
            }
            .map-legend.mobile-only h5 {
                display: none;
            }
            .map-legend.mobile-only .legend-items {
                display: flex;
                flex-wrap: wrap;
                justify-content: center;
                gap: 0.5rem 1rem;
            }
            .map-legend.mobile-only .legend-item {
                font-size: 0.7rem;
                color: rgba(255,255,255,0.7);
            }
            .data-source.mobile-only {
                position: static;
                font-size: 0.5rem;
                color: rgba(255,255,255,0.4);
                text-align: center;
                margin: 0.25rem 0 0.5rem 0;
            }
            /* Mobile hotspot - larger tap area */
            .hotspot::before {
                content: '';
                position: absolute; width: 44px; height: 44px; top: 50%; left: 50%; transform: translate(-50%, -50%);
            }
            /* Mobile tooltip - smaller and constrained */
            .hotspot-tooltip {
                min-width: 140px;
                max-width: 140px;
                padding: 0.5rem 0.75rem;
            }
            .hotspot-tooltip h4 {
                font-size: 0.65rem;
            }
            .hotspot-tooltip p {
                font-size: 0.55rem;
                line-height: 1.3;
            }
            .hotspot-tooltip .year {
                font-size: 0.5rem;
            }
            /* Mobile: show tooltip on tap */
            .hotspot:active .hotspot-tooltip,
            .hotspot:focus .hotspot-tooltip {
                opacity: 1;
                transform: translateX(-50%) translateY(-5px);
            }
        }