:root {
    --primary: #2563eb;
    --text: #111;
    --bg: #fff;
    --card: #f9fafc;
    --soft: #f1f4f8;
    --muted: #555;
    --r: 16px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary: #60a5fa;
        --text: #f1f1f1;
        --bg: #111;
        --card: #1a1a1a;
        --soft: #222;
        --muted: #aaa;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.top {
    padding: 18px 16px;
    background: var(--soft);
}

.top h1 {
    margin: 0 0 6px;
    font-size: 22px;
}

.top p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}

.entry {
    padding: 16px;
}

.entry h2 {
    font-size: 18px;
    margin: 0 0 12px;
}

.entry-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.entry-btn {
    padding: 16px;
    border-radius: 14px;
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.08);
    color: var(--text);
    transition: all 0.2s ease;
}

.entry-btn.dementia {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border: 2px solid #3b82f6;
}

.entry-btn.parkinson {
    background: linear-gradient(135deg, #ccfbf1 0%, #99f6e4 100%);
    border: 2px solid #14b8a6;
}

.entry-btn:active {
    transform: scale(0.98);
}

.regions {
    padding: 0 16px 10px;
}

.regions h2 {
    font-size: 18px;
    margin: 10px 0;
}

.region-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.region-nav {
    display: flex;
    gap: 10px;
    padding: 12px 16px;
    overflow-x: auto;
}

.chip {
    flex: 0 0 auto;
    padding: 10px 14px;
    border-radius: 999px;
    background: #eef2ff;
    text-decoration: none;
    color: var(--text);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
    font-size: 15px;
}

.chip.active {
    background: var(--primary);
    color: #fff;
}

.chip:active {
    transform: scale(0.98);
}

.notice {
    padding: 0 16px 10px;
    color: #666;
    font-size: 13px;
}

.list {
    padding: 0 16px 18px;
}

.card {
    background: var(--card);
    border-radius: var(--r);
    padding: 14px;
    margin-bottom: 12px;
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.07);
}

.card h3 {
    margin: 0 0 6px;
    font-size: 16px;
}

.meta {
    margin: 0 0 10px;
    color: var(--muted);
    font-size: 13px;
}

.tags {
    margin: 0 0 12px;
}

.tag {
    display: inline-block;
    padding: 6px 10px;
    border-radius: 999px;
    background: #eef2ff;
    font-size: 12px;
    margin-right: 6px;
}

.actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.btn {
    display: block;
    text-align: center;
    padding: 12px;
    border-radius: 12px;
    text-decoration: none;
    background: #e9eef8;
    color: var(--text);
    font-size: 15px;
}

.btn:active {
    transform: scale(0.98);
}

.btn.primary {
    background: var(--primary);
    color: #fff;
    font-weight: 600;
}

.footnote {
    margin-top: 8px;
    font-size: 12px;
    color: #666;
}

.quick-links {
    padding: 16px;
}

.quick-links h2 {
    font-size: 18px;
    margin: 0 0 12px;
}

.link-card {
    display: block;
    padding: 14px;
    margin-bottom: 10px;
    border-radius: 12px;
    background: var(--card);
    text-decoration: none;
    color: var(--text);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
}

.link-card:active {
    transform: scale(0.98);
}

.foot {
    padding: 16px;
    background: var(--soft);
    font-size: 13px;
    color: #555;
    text-align: center;
}

.backtop {
    display: inline-block;
    margin-top: 8px;
    color: var(--primary);
    text-decoration: none;
    font-size: 14px;
}