:root {
    --bg-top: #f5efe2;
    --bg-bottom: #eef4ff;
    --surface: rgba(255, 255, 255, 0.86);
    --surface-strong: #ffffff;
    --surface-muted: rgba(248, 249, 252, 0.92);
    --text: #102033;
    --text-soft: #566375;
    --line: rgba(16, 32, 51, 0.1);
    --primary: #123c73;
    --primary-strong: #0a2c55;
    --accent: #e5743b;
    --accent-soft: rgba(229, 116, 59, 0.12);
    --success: #0f8a60;
    --shadow-lg: 0 28px 70px rgba(11, 28, 47, 0.16);
    --shadow-md: 0 14px 36px rgba(11, 28, 47, 0.1);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(255, 220, 176, 0.9), transparent 28%),
        radial-gradient(circle at top right, rgba(151, 197, 255, 0.65), transparent 26%),
        linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 54%, #f8fafc 100%);
    min-height: 100vh;
    min-height: 100dvh;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.18) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.18) 1px, transparent 1px);
    background-size: 32px 32px;
    -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.4), transparent 85%);
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.4), transparent 85%);
}

.skip-link {
    position: absolute;
    left: 16px;
    top: -48px;
    z-index: 100;
    padding: 12px 16px;
    background: var(--primary);
    color: #fff;
    border-radius: 999px;
    text-decoration: none;
}

.skip-link:focus {
    top: 16px;
}

.container {
    width: min(1180px, calc(100% - 32px));
    width: min(1180px, calc(100% - 32px - env(safe-area-inset-left) - env(safe-area-inset-right)));
    margin: 0 auto;
}

.hero-shell {
    padding: 36px 0 20px;
    padding-top: calc(36px + env(safe-area-inset-top));
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 24px;
    align-items: stretch;
}

.hero-copy,
.hero-panel,
.region-shell .container,
.info-card {
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
}

.hero-copy,
.hero-panel {
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.hero-copy {
    padding: 36px;
}

.eyebrow,
.section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(18, 60, 115, 0.08);
    color: var(--primary);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.logo {
    margin: 18px 0 12px;
    font-size: clamp(2.4rem, 4vw, 4.3rem);
    line-height: 1.02;
    letter-spacing: -0.04em;
}

.tagline {
    max-width: 56ch;
    margin: 0;
    font-size: 1.08rem;
    line-height: 1.7;
    color: var(--text-soft);
}

.hero-actions {
    margin-top: 28px;
}

.hero-hint {
    margin: 12px 0 0;
    color: var(--text-soft);
    font-size: 0.95rem;
}

.hero-panel {
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.header-controls {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
}

.a11y-controls,
.lang-toggle,
.hero-stats,
.footer-links,
.recent-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.a11y-controls button,
.lang-toggle button,
.btn {
    border: 1px solid transparent;
    border-radius: 999px;
    font: inherit;
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.a11y-controls button,
.lang-toggle button {
    min-height: 42px;
    padding: 0 14px;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.84);
    color: var(--text);
    border-color: var(--line);
}

.lang-toggle button.active,
.lang-toggle button[aria-selected="true"],
.a11y-controls button.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.a11y-controls button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.hero-summary h2,
.panel-intro h3,
.recent-header h3,
.info-card h3,
.province-title,
.section-head h2 {
    margin: 0;
}

.hero-summary h2 {
    font-size: 1.05rem;
}

.summary-list {
    margin: 14px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 10px;
}

.summary-list li {
    position: relative;
    padding-left: 18px;
    color: var(--text-soft);
    line-height: 1.55;
}

.summary-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.72em;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    transform: translateY(-50%);
}

.stat-card {
    flex: 1;
    min-width: 96px;
    padding: 16px;
    background: var(--surface-strong);
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
}

.stat-card strong {
    display: block;
    font-size: 1.35rem;
    color: var(--primary);
}

.stat-card span {
    display: block;
    margin-top: 6px;
    color: var(--text-soft);
    font-size: 0.92rem;
}

.page-main {
    padding-bottom: 40px;
}

.ai-reference-shell {
    padding: 14px 0 24px;
}

.ai-reference-shell .container {
    padding: 28px 0 4px;
}

.reference-head {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 24px;
    align-items: start;
    margin-top: 14px;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--line);
}

.reference-head h2 {
    margin: 0;
    font-size: clamp(1.8rem, 3vw, 2.7rem);
    line-height: 1.08;
}

.reference-head p {
    margin: 0;
    color: var(--text-soft);
    line-height: 1.75;
    font-size: 1.02rem;
}

.reference-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    border-bottom: 1px solid var(--line);
}

.reference-item {
    padding: 22px 18px 22px 0;
    border-right: 1px solid var(--line);
}

.reference-item + .reference-item {
    padding-left: 18px;
}

.reference-item:last-child {
    border-right: 0;
}

.reference-item h3 {
    margin: 0 0 12px;
    font-size: 1rem;
}

.reference-item p,
.reference-item dd,
.source-list {
    color: var(--text-soft);
    line-height: 1.65;
}

.quote-item {
    grid-column: span 1;
}

.quote-item blockquote {
    margin: 0 0 12px;
    padding: 0 0 0 14px;
    border-left: 3px solid var(--accent);
    color: var(--text);
    font-weight: 800;
    line-height: 1.65;
}

.fact-list {
    display: grid;
    gap: 12px;
    margin: 0;
}

.fact-list div {
    display: grid;
    gap: 4px;
}

.fact-list dt {
    font-weight: 800;
    color: var(--text);
}

.fact-list dd {
    margin: 0;
}

.source-list {
    display: grid;
    gap: 8px;
    margin: 12px 0 0;
    padding-left: 18px;
}

.source-list a,
.reference-item a {
    color: var(--primary);
    font-weight: 800;
}

.region-shell .container {
    background: rgba(255, 255, 255, 0.84);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: 36px;
    box-shadow: var(--shadow-lg);
    padding: 30px;
}

.section-head {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: end;
    margin-bottom: 24px;
}

.section-head h2 {
    margin-top: 12px;
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    line-height: 1.08;
}

.section-note {
    max-width: 36ch;
    margin: 0;
    color: var(--text-soft);
    line-height: 1.6;
}

.tab-navigation {
    display: inline-grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    padding: 8px;
    border-radius: 18px;
    background: rgba(16, 32, 51, 0.06);
    margin-bottom: 22px;
}

.tab-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 52px;
    padding: 0 20px;
    border: none;
    border-radius: 14px;
    background: transparent;
    color: var(--text-soft);
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.tab-btn.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 12px 24px rgba(18, 60, 115, 0.22);
}

.tab-emoji,
.province-emoji {
    font-size: 0.88rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    opacity: 0.84;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.panel-intro {
    margin-bottom: 22px;
}

.panel-intro p {
    margin: 10px 0 0;
    color: var(--text-soft);
    line-height: 1.6;
}

.region-grid,
.city-grid,
.info-grid {
    display: grid;
    gap: 16px;
}

.region-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.city-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.region-card,
.city-card,
.info-card {
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
}

.region-card,
.city-card {
    min-height: 168px;
    padding: 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background:
        linear-gradient(160deg, rgba(255, 255, 255, 0.96), rgba(244, 247, 252, 0.92)),
        linear-gradient(135deg, rgba(18, 60, 115, 0.08), rgba(229, 116, 59, 0.08));
    box-shadow: var(--shadow-md);
}

.region-card::after,
.city-card::after {
    content: "";
    position: absolute;
    inset: auto -24px -24px auto;
    width: 88px;
    height: 88px;
    border-radius: 50%;
    background: var(--accent-soft);
}

.region-card:hover,
.city-card:hover,
.btn:hover,
.a11y-controls button:hover,
.lang-toggle button:hover {
    transform: translateY(-2px);
}

.region-icon,
.city-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 54px;
    height: 54px;
    border-radius: 16px;
    background: rgba(18, 60, 115, 0.08);
    color: var(--primary);
    font-size: 1.5rem;
    font-weight: 800;
}

.region-card h4,
.city-name {
    position: relative;
    z-index: 1;
    margin: 16px 0 6px;
    font-size: 1.2rem;
    font-weight: 800;
}

.region-info,
.city-code {
    position: relative;
    z-index: 1;
    margin: 0;
    color: var(--text-soft);
}

.city-code {
    font-size: 0.9rem;
}

.badge {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    width: fit-content;
    margin-top: 14px;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(15, 138, 96, 0.12);
    color: var(--success);
    font-size: 0.82rem;
    font-weight: 800;
}

.province-section + .province-section {
    margin-top: 28px;
}

.province-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 1.1rem;
}

.recent-regions {
    margin-top: 28px;
    padding: 22px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background: var(--surface-muted);
}

.recent-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
    margin-bottom: 14px;
}

.recent-item {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    padding: 0 14px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--line);
    color: var(--text);
    text-decoration: none;
    font-weight: 700;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 18px;
    font-weight: 800;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-strong));
    color: #fff;
    box-shadow: 0 16px 30px rgba(18, 60, 115, 0.24);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.84);
    border-color: var(--line);
    color: var(--text);
}

.btn-inline {
    min-height: 40px;
    padding-inline: 14px;
    font-size: 0.92rem;
}

.btn-auto-detect {
    width: 100%;
    max-width: 360px;
}

.loading {
    display: grid;
    place-items: center;
    gap: 12px;
    min-height: 180px;
    border-radius: var(--radius-lg);
    border: 1px dashed rgba(18, 60, 115, 0.18);
    background: rgba(255, 255, 255, 0.6);
    text-align: center;
}

.spinner {
    width: 42px;
    height: 42px;
    border: 4px solid rgba(18, 60, 115, 0.12);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.info-strip {
    margin-top: 24px;
}

.info-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-card {
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.7);
    background: var(--surface);
    box-shadow: var(--shadow-md);
}

.info-card p,
.site-footer p {
    margin: 10px 0 0;
    line-height: 1.65;
    color: var(--text-soft);
}

.site-footer {
    padding: 20px 0 34px;
    padding-bottom: calc(34px + env(safe-area-inset-bottom));
}

.footer-grid {
    display: grid;
    gap: 18px;
    align-items: start;
    padding: 26px 30px;
    border-radius: var(--radius-xl);
    background: rgba(17, 33, 50, 0.95);
    color: #fff;
    box-shadow: var(--shadow-lg);
}

.footer-grid h2 {
    margin: 0;
    font-size: 1.2rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.86);
    text-decoration: none;
    font-weight: 600;
}

body.contrast-high {
    background: #020406;
    color: #fff;
}

body.contrast-high::before {
    display: none;
}

body.contrast-high .hero-copy,
body.contrast-high .hero-panel,
body.contrast-high .region-shell .container,
body.contrast-high .recent-regions,
body.contrast-high .info-card,
body.contrast-high .region-card,
body.contrast-high .city-card,
body.contrast-high .stat-card {
    background: #0d131a;
    border-color: rgba(255, 255, 255, 0.16);
    color: #fff;
    box-shadow: none;
}

body.contrast-high .tagline,
body.contrast-high .section-note,
body.contrast-high .reference-head p,
body.contrast-high .panel-intro p,
body.contrast-high .region-info,
body.contrast-high .city-code,
body.contrast-high .info-card p,
body.contrast-high .site-footer p,
body.contrast-high .summary-list li,
body.contrast-high .stat-card span,
body.contrast-high .reference-item p,
body.contrast-high .reference-item dd,
body.contrast-high .source-list {
    color: rgba(255, 255, 255, 0.78);
}

body.contrast-high .reference-head,
body.contrast-high .reference-grid,
body.contrast-high .reference-item {
    border-color: rgba(255, 255, 255, 0.16);
}

body.contrast-high .quote-item blockquote,
body.contrast-high .fact-list dt,
body.contrast-high .source-list a,
body.contrast-high .reference-item a {
    color: #fff;
}

body.contrast-high .btn-secondary,
body.contrast-high .a11y-controls button,
body.contrast-high .lang-toggle button,
body.contrast-high .recent-item {
    background: #111922;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.18);
}

body.contrast-high .tab-navigation {
    background: rgba(255, 255, 255, 0.08);
}

body.contrast-high .tab-btn {
    color: rgba(255, 255, 255, 0.78);
}

body.font-lg {
    font-size: 1.05rem;
}

body.font-xl {
    font-size: 1.14rem;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@media (max-width: 980px) {
    .hero-grid,
    .info-grid,
    .reference-head {
        grid-template-columns: 1fr;
    }

    .reference-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        border-top: 1px solid var(--line);
    }

    .reference-item:nth-child(2n) {
        border-right: 0;
    }

    .reference-item:nth-child(n + 3) {
        border-top: 1px solid var(--line);
    }

    .section-head {
        flex-direction: column;
        align-items: start;
    }

    .section-note {
        max-width: none;
    }

    .region-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .city-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .container {
        width: min(100% - 20px, 100%);
        width: calc(100% - 20px - env(safe-area-inset-left) - env(safe-area-inset-right));
    }

    .hero-shell {
        padding-top: 14px;
        padding-top: calc(14px + env(safe-area-inset-top));
    }

    .hero-copy,
    .hero-panel,
    .region-shell .container,
    .footer-grid {
        padding: 22px;
        border-radius: 22px;
    }

    .header-controls,
    .recent-header {
        flex-direction: column;
        align-items: stretch;
    }

    .a11y-controls,
    .lang-toggle {
        width: 100%;
    }

    .a11y-controls button,
    .lang-toggle button,
    .btn-inline {
        flex: 1;
        justify-content: center;
    }

    .tab-navigation,
    .tab-btn {
        width: 100%;
    }

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

    .reference-item,
    .reference-item + .reference-item {
        padding: 18px 0;
        border-right: 0;
        border-top: 1px solid var(--line);
    }

    .reference-grid {
        border-top: 0;
    }

    .reference-item:first-child {
        border-top: 0;
    }

    .region-grid,
    .city-grid {
        grid-template-columns: 1fr;
    }

    .region-card,
    .city-card {
        min-height: 140px;
    }
}