:root {
    --bg: #f7f5f0;
    --fg: #1f1d1a;
    --muted: #6b6b6b;
    --accent: #5a3a1b;
    --border: #d8d3c8;
    --card: #ffffff;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--fg);
    background: var(--bg);
    height: 100%;
}

a {
    color: var(--accent);
}

a:hover {
    text-decoration: underline;
}

header.site {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--card);
    border-bottom: 1px solid var(--border);
}

header.site h1 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

header.site nav a {
    margin-right: 1rem;
    text-decoration: none;
    color: var(--fg);
    font-size: 0.95rem;
}

header.site nav a.active {
    color: var(--accent);
    font-weight: 600;
}

main {
    padding: 1.25rem;
}

/* ---------- home page ---------- */
.home {
    max-width: 760px;
    margin: 1rem auto;
}

.home h2 {
    font-size: 1.8rem;
    margin: 0 0 0.5rem;
}

.home .lead {
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.5;
    margin-bottom: 2rem;
}

.home-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.home-card {
    display: block;
    padding: 1.25rem 1.5rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 6px;
    text-decoration: none;
    color: var(--fg);
    transition: border-color 0.15s, transform 0.15s;
}

.home-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    text-decoration: none;
}

.home-card h3 {
    margin: 0 0 0.4rem;
    color: var(--accent);
    font-size: 1.1rem;
}

.home-card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.source-note {
    color: var(--muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border);
    padding-top: 1rem;
}

/* ---------- map page ---------- */
body.map-page main {
    padding: 0;
}

.source-banner {
    padding: 0.55rem 1.25rem;
    background: #efeae0;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--muted);
}

.source-banner a {
    color: var(--accent);
}

#map {
    width: 100%;
    height: calc(100vh - 49px);
}

.cave-pin {
    background: transparent;
    border: 0;
}

.cave-pin svg {
    display: block;
    filter: drop-shadow(0 1px 1px rgba(0, 0, 0, 0.3));
}

.map-legend {
    background: rgba(255, 255, 255, 0.92);
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    border: 1px solid var(--border);
    font-size: 0.82rem;
    line-height: 1.4;
    color: var(--fg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.map-legend .legend-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.map-legend .legend-row+.legend-row {
    margin-top: 0.35rem;
}

.map-legend .legend-swatch {
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 1px solid #222;
    margin-right: 0.2rem;
}

.map-legend .legend-sep {
    display: inline-block;
    width: 0.5rem;
}

.map-legend strong {
    margin-right: 0.4rem;
}

.popup-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.popup-meta {
    color: var(--muted);
    font-size: 0.85rem;
}

.popup-link {
    display: inline-block;
    margin-top: 0.4rem;
}

/* ---------- table page ---------- */
.toolbar {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 0.75rem;
}

.toolbar input[type="search"] {
    flex: 1;
    padding: 0.5rem 0.75rem;
    font-size: 0.95rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--card);
}

.toolbar .count {
    color: var(--muted);
    font-size: 0.9rem;
}

table.caves {
    width: 100%;
    border-collapse: collapse;
    background: var(--card);
    font-size: 0.92rem;
}

table.caves th,
table.caves td {
    padding: 0.55rem 0.75rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
}

table.caves th {
    background: #efeae0;
    cursor: pointer;
    user-select: none;
    position: sticky;
    top: 0;
    font-weight: 600;
}

table.caves th .arrow {
    color: var(--muted);
    margin-left: 0.25rem;
}

table.caves tbody tr:hover {
    background: #faf7ef;
}

table.caves td.num {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

table.caves a {
    text-decoration: none;
}

table.caves a:hover {
    text-decoration: underline;
}

/* ---------- cave detail ---------- */

.cave-detail {
    max-width: 900px;
    margin: 0 auto;
}

.cave-detail h2 {
    margin: 0 0 0.25rem;
    font-size: 1.6rem;
}

.cave-detail .ti {
    color: var(--muted);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.cave-detail section {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}

.cave-detail section h3 {
    margin: 0 0 0.6rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--accent);
}

.cave-detail dl {
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: 0.4rem 1rem;
    margin: 0;
}

.cave-detail dt {
    color: var(--muted);
}

.cave-detail dd {
    margin: 0;
}

.cave-detail .description {
    white-space: pre-wrap;
    line-height: 1.5;
}

.cave-detail ul {
    margin: 0;
    padding-left: 1.2rem;
}

#mini-map {
    height: 260px;
    border-radius: 4px;
    margin-top: 0.5rem;
}

.error {
    padding: 1rem;
    background: #fdecea;
    border: 1px solid #f5c2c0;
    border-radius: 4px;
    color: #7a1f1c;
}