@import url('https://fonts.googleapis.com/css2?family=Lexend:wght@300;400;500;600;700&display=swap');

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

        :root {
            --ice-blue: #e8f4f8;
            --deep-blue: #1a4d6d;
            --warm-orange: #ff6b35;
            --soft-gray: #5a6c7d;
            --snow-white: #fafbfc;
            --light-blue: #f0f7fa;
            --accent-blue: #2c5f7d;
            --container-padding: 2rem;
            --container-padding-mobile: 1.5rem;
        }

        body {
            font-family: 'Lexend', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: 
                linear-gradient(to bottom, var(--ice-blue), var(--snow-white)),
                repeating-linear-gradient(
                    45deg,
                    transparent,
                    transparent 100px,
                    rgba(26, 77, 109, 0.01) 100px,
                    rgba(26, 77, 109, 0.01) 101px
                );
            color: var(--deep-blue);
            line-height: 1.6;
            overflow-x: hidden;
        }

        .hero {
            min-height: 60vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            padding: 2rem;
            position: relative;
            overflow: hidden;
        }

        .hero::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('assets/ratece-hero.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            filter: grayscale(100%);
            opacity: 0.15;
            z-index: 0;
        }

        .hero::before {
            content: '❄';
            position: absolute;
            font-size: 15rem;
            opacity: 0.08;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            pointer-events: none;
            z-index: 0;
        }

        .hero > * {
            position: relative;
            z-index: 1;
        }

        .photo-credit {
            position: absolute;
            bottom: 1rem;
            right: 1.5rem;
            font-size: 0.75rem;
            color: rgba(90, 108, 125, 0.7);
            z-index: 2;
            text-align: right;
        }

        .photo-credit a {
            color: rgba(90, 108, 125, 0.8);
            text-decoration: none;
            border-bottom: 1px solid rgba(90, 108, 125, 0.3);
            transition: all 0.3s ease;
        }

        .photo-credit a:hover {
            color: var(--warm-orange);
            border-bottom-color: var(--warm-orange);
        }

        h1 {
            font-size: clamp(3rem, 8vw, 7rem);
            font-weight: 600;
            letter-spacing: -0.04em;
            margin-bottom: 1rem;
            position: relative;
            background: linear-gradient(135deg, var(--deep-blue), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .subtitle {
            font-size: clamp(1.2rem, 3vw, 2rem);
            color: var(--soft-gray);
            font-weight: 400;
            margin-bottom: 3rem;
        }

        .location {
            font-size: 1rem;
            color: var(--soft-gray);
            opacity: 0.8;
        }

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

        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }

        .stat-card {
            background: linear-gradient(135deg, #ffffff 0%, #fafbfc 100%);
            padding: var(--container-padding);
            border-radius: 20px;
            box-shadow: 0 2px 16px rgba(26, 77, 109, 0.06);
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            border: 2px solid transparent;
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--warm-orange), #ff8c61);
            opacity: 0;
            transition: opacity 0.4s ease;
        }

        .stat-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 40px rgba(26, 77, 109, 0.12);
            border-color: rgba(255, 107, 53, 0.15);
        }

        .stat-card:hover::before {
            opacity: 1;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 500;
            background: linear-gradient(135deg, var(--deep-blue), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            margin-bottom: 0.75rem;
        }

        .stat-label {
            font-size: 0.75rem;
            color: var(--soft-gray);
            text-transform: uppercase;
            letter-spacing: 0.1em;
            font-weight: 600;
        }

        .stat-trend {
            margin-top: 1.25rem;
            font-size: 1rem;
            color: var(--warm-orange);
            font-weight: 500;
        }

        .stat-note {
            font-size: 0.85rem;
            opacity: 0.7;
        }

        .chart-container {
            background: white;
            padding: var(--container-padding);
            border-radius: 24px;
            box-shadow: 0 2px 20px rgba(26, 77, 109, 0.06);
            margin: 1.5rem 0;
            position: relative;
            border: 1px solid rgba(26, 77, 109, 0.05);
        }

        .chart-interaction-note {
            font-size: 0.9rem;
            color: var(--soft-gray);
            opacity: 0.78;
            margin-top: 0.1rem;
            margin-bottom: 0.8rem;
        }

        .chart-title {
            font-size: 1.5rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
            color: var(--deep-blue);
            letter-spacing: -0.01em;
        }

        .stats-disclosure {
            background: #fff;
            border: 1px solid rgba(26, 77, 109, 0.08);
            border-radius: 18px;
            box-shadow: 0 2px 20px rgba(26, 77, 109, 0.06);
            margin: 0.75rem 0 1rem;
            transition: box-shadow 0.2s ease, border-color 0.2s ease;
        }

        .stats-disclosure:hover {
            box-shadow: 0 2px 16px rgba(26, 77, 109, 0.06);
            border-color: rgba(26, 77, 109, 0.16);
        }

        .stats-summary {
            list-style: none;
            cursor: pointer;
            user-select: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1rem 1.25rem;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--deep-blue);
            border-radius: 18px;
            transition: background-color 0.2s ease;
        }

        .stats-summary:hover {
            background-color: rgba(26, 77, 109, 0.05);
        }

        details[open] > .stats-summary {
            border-bottom: 1px solid rgba(26, 77, 109, 0.1);
            border-bottom-left-radius: 0;
            border-bottom-right-radius: 0;
        }

        .stats-summary::-webkit-details-marker {
            display: none;
        }

        .stats-summary::after {
            content: '▸';
            color: rgba(90, 108, 125, 0.65);
            font-size: 1.35rem;
            line-height: 1;
            transition: transform 0.2s ease;
        }

        details[open] > .stats-summary::after {
            transform: rotate(90deg);
        }

        .stats-summary-note {
            font-size: 0.85rem;
            color: var(--soft-gray);
            font-weight: 500;
            margin-right: auto;
        }

        .stats-content {
            padding: 0.6rem 1.25rem 0.6rem;
        }

        .stats-block + .stats-block {
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid rgba(26, 77, 109, 0.1);
        }

        .stats-block .chart-title {
            margin-bottom: 0.5rem;
            font-size: 1.35rem;
        }

        .stats-block .story-text:last-child {
            margin-bottom: 0;
        }

        .story-text {
            font-size: 1.2rem;
            line-height: 1.8;
            color: var(--soft-gray);
            margin: 1.5rem 0;
            font-weight: 400;
        }

        .period-summary-text {
            position: relative;
        }


        .story-heading-primary {
            margin-top: 1.5rem;
            font-weight: 600;
            color: var(--deep-blue);
        }

        .story-heading-accent {
            margin-top: 2.5rem;
            font-weight: 600;
            color: var(--warm-orange);
        }

        .story-center-spaced {
            text-align: center;
            margin-bottom: 2rem;
        }

        .story-text-tight-top {
            margin-top: 1rem;
        }

        .section-top-spaced {
            margin-top: 2.5rem;
        }

        .section-tight-vertical {
            padding-top: 0.25rem;
            padding-bottom: 0.25rem;
        }

        .chart-caption {
            margin-top: 0.75rem;
            font-size: 0.9rem;
            opacity: 0.75;
            text-align: center;
        }

        .highlight {
            color: var(--warm-orange);
            font-weight: 500;
        }

        .stat-inline {
            font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
            font-size: 0.98em;
            letter-spacing: 0.02em;
            font-weight: 400;
            color: inherit;
        }

        .period-compare {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            margin: 2.5rem 0;
        }

        .compact-grid-tight,
        .stat-grid-tight {
            margin-top: 1rem;
        }

        .method-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 1rem;
            font-size: 0.95rem;
            color: var(--deep-blue);
        }

        .method-table-wrap {
            width: 100%;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }

        .method-table-wrap-tight {
            margin-top: 0.6rem;
        }

        .method-table-no-top-margin {
            margin-top: 0;
        }

        .method-intro-text {
            margin-top: 0;
            margin-bottom: 0.6rem;
            font-size: 1rem;
        }

        .method-note-text {
            margin-top: 0.6rem;
            font-size: 0.95rem;
            opacity: 0.85;
        }

        .method-table th,
        .method-table td {
            border-bottom: 1px solid rgba(26, 77, 109, 0.12);
            padding: 0.7rem 0.5rem;
            text-align: left;
            vertical-align: top;
        }

        .method-table th {
            font-weight: 600;
            color: var(--accent-blue);
            background: rgba(26, 77, 109, 0.04);
        }

        .model-switch {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            margin: 0.8rem 0 1.2rem;
            color: var(--soft-gray);
            font-size: 0.95rem;
        }

        .model-picker {
            position: relative;
            min-width: 152px;
        }

        .model-picker-trigger {
            width: 100%;
            text-align: left;
            border: 1px solid rgba(26, 77, 109, 0.2);
            border-radius: 8px;
            padding: 0.35rem 1.9rem 0.35rem 0.55rem;
            background: #fff;
            color: var(--deep-blue);
            font-family: 'Lexend', 'Segoe UI', system-ui, -apple-system, sans-serif;
            font-weight: 500;
            font-size: 0.92rem;
            line-height: 1.3;
            cursor: pointer;
            position: relative;
        }

        .model-picker-trigger:focus-visible {
            outline: 2px solid rgba(44, 95, 125, 0.55);
            outline-offset: 2px;
        }

        .model-picker-trigger::after {
            content: '▾';
            position: absolute;
            right: 0.55rem;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(90, 108, 125, 0.75);
            font-size: 0.85rem;
            pointer-events: none;
        }

        .model-picker-menu {
            position: absolute;
            top: calc(100% + 0.35rem);
            left: 0;
            right: 0;
            z-index: 20;
            background: #fff;
            border: 1px solid rgba(26, 77, 109, 0.2);
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(26, 77, 109, 0.14);
            padding: 0.25rem;
            display: grid;
            gap: 0.1rem;
        }

        .model-picker-menu[hidden] {
            display: none !important;
        }

        .model-picker-option {
            border: 0;
            background: transparent;
            color: var(--deep-blue);
            text-align: left;
            padding: 0.4rem 0.45rem;
            border-radius: 7px;
            font-family: 'Lexend', 'Segoe UI', system-ui, -apple-system, sans-serif;
            font-weight: 500;
            font-size: 0.92rem;
            line-height: 1.25;
            cursor: pointer;
        }

        .model-picker-option:focus-visible {
            outline: 2px solid rgba(44, 95, 125, 0.4);
            outline-offset: -1px;
        }

        .model-picker-option:hover {
            background: rgba(26, 77, 109, 0.08);
        }

        .model-picker-option.active {
            background: rgba(26, 77, 109, 0.12);
        }

        .model-switch select {
            border: 1px solid rgba(26, 77, 109, 0.2);
            border-radius: 8px;
            padding: 0.35rem 0.55rem;
            background: #fff;
            color: var(--deep-blue);
            font-family: 'Lexend', 'Segoe UI', system-ui, -apple-system, sans-serif;
            font-weight: 500;
            font-size: 0.92rem;
            -webkit-appearance: none;
            appearance: none;
        }

        .model-switch select option {
            font-family: 'Lexend', 'Segoe UI', system-ui, -apple-system, sans-serif;
            font-weight: 500;
        }

        .explain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 1rem;
            margin-top: 0.5rem;
        }

        .explain-item {
            background: linear-gradient(135deg, rgba(240, 247, 250, 0.7), rgba(255, 255, 255, 0.9));
            border: 1px solid rgba(26, 77, 109, 0.1);
            border-radius: 12px;
            padding: var(--container-padding);
        }

        .explain-term {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--accent-blue);
            margin-bottom: 0.35rem;
        }

        .explain-text {
            font-size: 0.9rem;
            line-height: 1.55;
            color: var(--soft-gray);
        }

        .period-card {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.85));
            padding: var(--container-padding);
            border-radius: 16px;
            border: 2px solid rgba(26, 77, 109, 0.1);
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
        }

        .period-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(26, 77, 109, 0.12);
            border-color: rgba(26, 77, 109, 0.2);
        }

        .period-title {
            font-size: 1.5rem;
            font-weight: 500;
            margin-bottom: 1rem;
            padding-bottom: 0.55rem;
            color: var(--deep-blue);
            border-bottom: 2px solid rgba(26, 77, 109, 0.26);
        }

        .period-years {
            font-size: 0.76em;
            font-weight: 400;
            color: var(--soft-gray);
        }

        .period-stat {
            margin: 0.9rem 0;
            padding-bottom: 0.8rem;
            border-bottom: 1px solid rgba(26, 77, 109, 0.1);
        }

        .period-stat:last-child {
            border-bottom: none;
            margin-bottom: 0.35rem;
            padding-bottom: 0.2rem;
        }

        .period-stat-value {
            font-size: 2rem;
            font-weight: 400;
            color: var(--deep-blue);
        }

        .period-stat-label {
            font-size: 0.85rem;
            color: var(--soft-gray);
            margin-top: 0.25rem;
        }

        .map-info-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            align-items: stretch;
            margin: 3rem 0;
        }

        .map-container {
            background: white;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(26, 77, 109, 0.08);
            height: auto;
            min-height: 400px;
            position: relative;
        }

        .map-container iframe {
            width: 100%;
            height: 100%;
            border: none;
        }

        .map-iframe-reset {
            border: none;
        }

        .station-info {
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.98), rgba(245, 251, 255, 0.92));
            padding: var(--container-padding);
            border-radius: 18px;
            box-shadow: 0 6px 24px rgba(26, 77, 109, 0.09);
            border: 1px solid rgba(26, 77, 109, 0.1);
            min-height: 400px;
            height: auto;
            display: flex;
            flex-direction: column;
            justify-content: flex-start;
        }

        .station-info h3 {
            font-size: 1.9rem;
            font-weight: 500;
            margin-bottom: 0;
            padding-bottom: 0.55rem;
            color: var(--deep-blue);
            letter-spacing: -0.01em;
            border-bottom: 2px solid rgba(26, 77, 109, 0.26);
        }

        .station-title {
            margin-bottom: 1.5rem;
        }

        .info-items-container {
            display: flex;
            flex-direction: column;
            gap: 0.2rem;
        }

        .info-item {
            margin: 0;
            padding: 1rem 0;
            border-bottom: 1px solid rgba(26, 77, 109, 0.12);
        }

        .info-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .info-label {
            font-size: 0.74rem;
            color: var(--soft-gray);
            text-transform: uppercase;
            letter-spacing: 0.12em;
            margin-bottom: 0.35rem;
            font-weight: 400;
        }

        .info-value {
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--deep-blue);
            line-height: 1.35;
        }

        .station-link {
            display: inline-flex;
            color: var(--soft-gray);
            text-decoration: none;
            font-size: 0.84rem;
            font-weight: 500;
            border-bottom: 1px solid rgba(90, 108, 125, 0.28);
            opacity: 0.88;
            transition: all 0.3s ease;
            margin-left: 0;
            margin-top: 0.22rem;
            width: fit-content;
        }

        .station-link:hover {
            color: var(--warm-orange);
            border-bottom-color: var(--warm-orange);
            opacity: 1;
        }

        .compact-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }

        .compact-stat {
            text-align: center;
            background: white;
            padding: var(--container-padding);
            border-radius: 16px;
            box-shadow: 0 2px 12px rgba(26, 77, 109, 0.05);
            border: 1px solid rgba(26, 77, 109, 0.08);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .compact-stat:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(26, 77, 109, 0.1);
            border-color: rgba(26, 77, 109, 0.15);
        }

        .compact-stat-number {
            font-size: 2.35rem;
            font-weight: 500;
            background: linear-gradient(135deg, var(--deep-blue), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            margin-bottom: 0.75rem;
        }

        .compact-stat-label {
            font-size: 0.85rem;
            color: var(--soft-gray);
            line-height: 1.5;
            font-weight: 500;
        }

        .section-divider {
            max-width: 200px;
            height: 2px;
            background: linear-gradient(to right, transparent, var(--deep-blue), transparent);
            margin: 4rem auto;
            opacity: 0.2;
        }

        .tldr-box {
            background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
            border-left: 4px solid var(--warm-orange);
            padding: var(--container-padding);
            border-radius: 12px;
            margin: 2rem 0;
            box-shadow: 0 4px 16px rgba(26, 77, 109, 0.08);
        }

        .tldr-title {
            font-size: 0.85rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--warm-orange);
            margin-bottom: 1rem;
        }

        .tldr-content {
            font-size: 1.1rem;
            line-height: 1.7;
            color: var(--deep-blue);
        }

        .tldr-content strong {
            color: var(--warm-orange);
            font-weight: 500;
        }

        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2rem 0;
        }

        .comparison-card {
            background: white;
            padding: var(--container-padding);
            border-radius: 16px;
            box-shadow: 0 4px 20px rgba(26, 77, 109, 0.08);
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }

        .comparison-card.cold {
            border-color: rgba(26, 77, 109, 0.2);
        }

        .comparison-card.warm {
            border-color: rgba(255, 107, 53, 0.2);
        }

        .comparison-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 30px rgba(26, 77, 109, 0.15);
        }

        .comparison-year {
            font-size: 3rem;
            font-weight: 300;
            color: var(--deep-blue);
            margin-bottom: 0.5rem;
        }

        .comparison-label {
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--soft-gray);
            margin-bottom: 1.5rem;
        }

        .comparison-stats {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .comparison-stat-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0.75rem 0;
            border-bottom: 1px solid rgba(26, 77, 109, 0.08);
        }

        .comparison-stat-row:last-child {
            border-bottom: none;
        }

        .comparison-stat-label {
            font-size: 0.85rem;
            color: var(--soft-gray);
        }

        .comparison-stat-value {
            font-size: 1.2rem;
            font-weight: 400;
            color: var(--deep-blue);
        }

        .comparison-stat-label .tooltip-text {
            width: max-content;
            max-width: min(90vw, 300px);
            white-space: nowrap;
        }

        .tooltip-term {
            position: relative;
            border-bottom: 1px dotted var(--soft-gray);
            cursor: help;
        }

        .tooltip-term:hover {
            border-bottom-color: var(--warm-orange);
        }

        .tooltip-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 1.15em;
            height: 1.15em;
            margin-left: 0.2rem;
            border-bottom: none;
            line-height: 1;
            vertical-align: middle;
        }

        .period-summary-text .tooltip-icon {
            position: static;
        }

        .period-summary-text .tooltip-icon .tooltip-text {
            position: absolute;
            left: 50%;
            right: auto;
            top: 0;
            bottom: auto;
            transform: translateX(-50%);
            width: min(92vw, 460px);
            max-width: 460px;
            text-align: left;
        }

        .period-summary-text .tooltip-icon .tooltip-text::after {
            left: var(--period-tooltip-arrow-x, 50%);
            right: auto;
            transform: translateX(-50%);
        }

        .tooltip-text {
            visibility: hidden;
            opacity: 0;
            position: absolute;
            bottom: 125%;
            left: 50%;
            transform: translateX(-50%);
            background-color: rgba(26, 77, 109, 0.95);
            color: white;
            padding: 0.75rem 1rem;
            border-radius: 8px;
            font-size: 0.85rem;
            line-height: 1.4;
            white-space: normal;
            width: 220px;
            max-width: 90vw;
            z-index: 1000;
            transition: opacity 0.3s, visibility 0.3s;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        }

        .tooltip-text::after {
            content: '';
            position: absolute;
            top: 100%;
            left: var(--tooltip-arrow-x, 50%);
            transform: translateX(-50%);
            border: 6px solid transparent;
            border-top-color: rgba(26, 77, 109, 0.95);
        }

        .tooltip-term:hover .tooltip-text {
            visibility: visible;
            opacity: 1;
        }

        .tooltip-icon.is-open .tooltip-text {
            visibility: visible;
            opacity: 1;
        }

        .tooltip-term:focus .tooltip-text,
        .tooltip-term:focus-visible .tooltip-text {
            visibility: visible;
            opacity: 1;
        }

        .counter {
            display: inline-block;
        }

        .scroll-indicator {
            position: absolute;
            bottom: 3rem;
            left: 50%;
            transform: translateX(-50%);
            animation: bounce 2s infinite;
        }

        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% {
                transform: translateX(-50%) translateY(0);
            }
            40% {
                transform: translateX(-50%) translateY(-20px);
            }
            60% {
                transform: translateX(-50%) translateY(-10px);
            }
        }

        .scroll-arrow {
            width: 30px;
            height: 30px;
            border-left: 2px solid var(--deep-blue);
            border-bottom: 2px solid var(--deep-blue);
            transform: rotate(-45deg);
            opacity: 0.5;
        }

        footer {
            text-align: center;
            padding: 3rem 2rem;
            color: var(--soft-gray);
            font-size: 0.9rem;
            font-style: normal;
            opacity: 0.7;
        }

        .footer-link {
            color: var(--deep-blue);
            text-decoration: none;
            border-bottom: 1px solid var(--deep-blue);
            font-style: normal;
            transition: opacity 0.3s;
        }

        .footer-link:hover {
            opacity: 0.6;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 3rem;
            }

            .stat-card,
            .chart-container,
            .explain-item,
            .period-card,
            .station-info,
            .compact-stat,
            .tldr-box,
            .comparison-card {
                padding: var(--container-padding-mobile);
            }
            
            .stat-grid {
                grid-template-columns: 1fr;
            }
            
            .period-compare {
                grid-template-columns: 1fr;
            }

            .map-info-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
                margin: 1.25rem 0;
            }

            .map-container {
                height: 260px;
            }

            .station-info {
                height: auto;
                min-height: 0;
                justify-content: flex-start;
            }

            .info-items-container {
                gap: 0;
            }

            .info-value {
                font-size: 1.05rem;
                line-height: 1.3;
            }

            .station-link {
                display: block;
                margin-left: 0;
                margin-top: 0.35rem;
            }

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

            .tldr-box {
                border-left-width: 3px;
            }

            .comparison-year {
                font-size: 2.5rem;
            }

            .tooltip-text {
                left: 50%;
                right: auto;
                transform: translateX(-50%);
                width: min(88vw, 280px);
                text-align: left;
            }

            .tooltip-icon {
                width: 1.2em;
                height: 1.2em;
            }

            .period-summary-text .tooltip-icon .tooltip-text {
                position: absolute;
                left: 50%;
                top: 0;
                bottom: auto;
                right: auto;
                transform: translateX(-50%);
                width: min(94vw, 320px);
                max-width: 320px;
                text-align: left;
                max-height: none;
                overflow: visible;
                z-index: 1000;
            }

            .period-summary-text .tooltip-icon .tooltip-text::after {
                display: block;
                left: var(--period-tooltip-arrow-x, 50%);
                right: auto;
                transform: translateX(-50%);
            }

            .tooltip-text::after {
                left: var(--tooltip-arrow-x, 50%);
                right: auto;
                transform: translateX(-50%);
            }

            .stats-summary {
                font-size: 0.98rem;
                padding: 0.9rem 1rem;
            }

            .stats-summary-note {
                display: none;
            }

            .stats-content {
                padding: 0.55rem 1rem 0.55rem;
            }
        }