/* 友達傳醫社 - 傳統醫學風格 */

:root {
    --bg-color: #f8f6f2;
    --text-color: #3d3a36;
    --accent-color: #6b8c6b;
    --accent-dark: #4e6b4e;
    --accent-light: #e8f0e8;
    --card-bg: #ffffff;
    --border-color: #dde5dd;
    --shadow: 0 2px 20px rgba(107, 140, 107, 0.08);
    --shadow-hover: 0 8px 30px rgba(107, 140, 107, 0.18);
    --tag-bg: #f0f5f0;
}

[data-theme="dark"] {
    --bg-color: #1a1c1a;
    --text-color: #cdd4cd;
    --accent-color: #82a882;
    --accent-dark: #9aba9a;
    --accent-light: #222822;
    --card-bg: #232623;
    --border-color: #303830;
    --shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.4);
    --tag-bg: #2a302a;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-color: #1a1c1a;
        --text-color: #cdd4cd;
        --accent-color: #82a882;
        --accent-dark: #9aba9a;
        --accent-light: #222822;
        --card-bg: #232623;
        --border-color: #303830;
        --shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.4);
        --tag-bg: #2a302a;
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.9;
    font-size: 17px;
    min-height: 100vh;
}

/* Header */
header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1.2rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    max-width: 900px;
    margin: 0 auto;
}

.site-title h1 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: 2px;
}

.tagline {
    font-size: 0.8rem;
    color: var(--text-color);
    opacity: 0.55;
    margin-top: 0.15rem;
}

.nav-row {
    max-width: 900px;
    margin: 1rem auto 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    padding-top: 0.9rem;
    border-top: 1px solid var(--border-color);
    gap: 0.8rem;
}

nav {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 1.2rem;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.88rem;
    position: relative;
    padding-bottom: 3px;
    transition: color 0.3s;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

nav a:hover { color: var(--accent-color); }
nav a:hover::after { width: 100%; }

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex-shrink: 0;
}

.theme-toggle {
    border: none;
    background: none;
    cursor: pointer;
    padding: 0.2rem;
    color: var(--text-color);
    opacity: 0.7;
    display: flex;
    align-items: center;
}

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

/* Hero intro */
.hero {
    background: linear-gradient(135deg, var(--card-bg) 0%, var(--accent-light) 100%);
    padding: 2.5rem;
    border-radius: 20px;
    margin-bottom: 2.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.hero h2 {
    font-size: 1.3rem;
    color: var(--accent-dark);
    margin-bottom: 0.6rem;
    line-height: 1.6;
}

.hero p {
    color: var(--text-color);
    opacity: 0.75;
    font-size: 0.95rem;
}

/* Category grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.2rem;
    margin-bottom: 3rem;
}

.category-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.6rem;
    text-decoration: none;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.category-card .cat-icon {
    font-size: 1.8rem;
    margin-bottom: 0.8rem;
    display: block;
}

.category-card .cat-name {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--accent-dark);
    margin-bottom: 0.4rem;
}

.category-card .cat-desc {
    font-size: 0.83rem;
    color: var(--text-color);
    opacity: 0.65;
    line-height: 1.6;
}

/* Section headers */
.section-title {
    font-size: 1rem;
    color: var(--accent-color);
    margin-bottom: 1.8rem;
    padding-bottom: 0.7rem;
    border-bottom: 2px solid var(--accent-light);
    letter-spacing: 1px;
}

/* Post cards */
.post-card {
    background: var(--card-bg);
    margin-bottom: 1.4rem;
    padding: 1.8rem 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.post-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.post-card .date {
    font-size: 0.78rem;
    color: var(--accent-color);
    display: inline-block;
    margin-bottom: 0.7rem;
    font-family: "SF Mono", Monaco, monospace;
    background: var(--accent-light);
    padding: 0.25rem 0.7rem;
    border-radius: 20px;
}

.post-card h3 {
    margin-bottom: 0.8rem;
    line-height: 1.5;
    font-size: 1.15rem;
}

.post-card h3 a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s;
}

.post-card h3 a:hover { color: var(--accent-color); }

.post-card .excerpt {
    color: var(--text-color);
    opacity: 0.72;
    font-size: 0.93rem;
    line-height: 1.8;
    margin-bottom: 0.8rem;
}

.tag {
    display: inline-block;
    background: var(--tag-bg);
    color: var(--accent-dark);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.78rem;
    margin-right: 6px;
    border: 1px solid var(--border-color);
    transition: all 0.2s;
    text-decoration: none;
}

.tag:hover {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

/* Article styles */
.article {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.article-header {
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--accent-light);
}

.article-header h1 {
    font-size: 1.8rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.article-meta {
    color: var(--accent-color);
    font-size: 0.85rem;
    margin-bottom: 0.8rem;
}

.article-content p { margin-bottom: 1.8rem; }

.article-content ul,
.article-content ol {
    margin: 0 0 1.8rem 1.5rem;
}

.article-content li { margin-bottom: 0.6rem; }

.article-content h2 {
    font-size: 1.3rem;
    color: var(--accent-color);
    margin: 2.5rem 0 1.2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-light);
}

.article-content h3 {
    font-size: 1.1rem;
    color: var(--accent-dark);
    margin: 1.8rem 0 0.8rem;
}

.article-content blockquote {
    border-left: 4px solid var(--accent-color);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    background: var(--accent-light);
    border-radius: 0 12px 12px 0;
    font-style: italic;
}

.article-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1.5rem auto;
    border-radius: 8px;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.93rem;
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.article-content thead { background: var(--accent-light); }

.article-content th {
    padding: 0.9rem 0.8rem;
    text-align: center;
    font-weight: 600;
    color: var(--accent-dark);
    border-bottom: 2px solid var(--accent-color);
}

.article-content td {
    padding: 0.75rem 0.8rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.article-content tbody tr:last-child td { border-bottom: none; }
.article-content tbody tr:hover { background: var(--accent-light); }

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2.5rem;
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.6rem 1.2rem;
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    transition: all 0.3s;
}

.back-link:hover {
    background: var(--accent-color);
    color: white;
}

/* Category page list */
.post-list { list-style: none; }

/* Footer */
footer {
    text-align: center;
    padding: 2.5rem 2rem;
    color: #aaa;
    font-size: 0.83rem;
    border-top: 1px solid var(--border-color);
    margin-top: 3rem;
}

/* Responsive */
@media (max-width: 600px) {
    header { padding: 1rem; }
    main { padding: 1.5rem 1rem; }
    .category-grid { grid-template-columns: 1fr 1fr; gap: 0.8rem; }
    .article { padding: 1.5rem; border-radius: 16px; }
    .article-header h1 { font-size: 1.4rem; }
    .hero { padding: 1.5rem; }
    nav { gap: 0.8rem 1.2rem; }
}