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

:root {
    --primary: #8B4513;
    --primary-light: #A0522D;
    --bg: #f9f3e9;
    --card-bg: #ffffff;
    --text: #2c1810;
    --text-light: #5a3e2b;
    --shadow: 0 4px 20px rgba(139, 69, 19, 0.1);
    --radius: 16px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --bg: #1a1a2e;
    --card-bg: #16213e;
    --text: #eaeaea;
    --text-light: #b0b0b0;
    --shadow: 0 4px 20px rgba(0,0,0,0.3);
    --primary: #c7945e;
    --primary-light: #d4a574;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: var(--transition);
}

/* Navbar */
.navbar {
    background: var(--card-bg);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.8rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: var(--transition);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    gap: 0.8rem;
}

.btn-icon {
    background: none;
    border: 2px solid var(--primary);
    color: var(--primary);
    padding: 0.5rem 0.8rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--primary);
    color: white;
}

.hamburger {
    display: none;
    font-size: 1.5rem;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    padding: 4rem 1.5rem;
    text-align: center;
}

.hero-content h1 {
    font-size: 2.8rem;
    margin-bottom: 1rem;
    font-weight: 800;
}

.hero-content p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

.hero-search form {
    display: flex;
    max-width: 500px;
    margin: 0 auto;
    background: white;
    border-radius: 50px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.hero-search input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: none;
    outline: none;
    font-size: 1rem;
    color: var(--text);
}

.hero-search button {
    padding: 1rem 2rem;
    background: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
}

.hero-search button:hover {
    background: var(--primary-light);
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1.5rem;
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 2rem;
}

/* Sidebar */
.sidebar {
    position: sticky;
    top: 80px;
    height: fit-content;
}

.filter-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.filter-card h3 {
    margin-bottom: 1rem;
    color: var(--primary);
    font-size: 1.1rem;
}

.filter-card ul {
    list-style: none;
}

.filter-card ul li a {
    display: block;
    padding: 0.5rem 0.8rem;
    color: var(--text);
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
}

.filter-card ul li a:hover,
.filter-card ul li a.active {
    background: var(--primary);
    color: white;
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: var(--bg);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

.tag:hover,
.tag.active {
    background: var(--primary);
    color: white;
}

.hot-item {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.hot-item a {
    color: var(--text);
    text-decoration: none;
}

.hot-item a:hover {
    color: var(--primary);
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(139, 69, 19, 0.15);
}

.card-image {
    height: 200px;
    background-size: cover;
    background-position: center;
}

.card-body {
    padding: 1.5rem;
}

.card-category {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 0.2rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 0.8rem;
}

.card-body h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.card-body h3 a {
    color: var(--text);
    text-decoration: none;
}

.card-body h3 a:hover {
    color: var(--primary);
}

.card-body p {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.card-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 0.8rem;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    margin-bottom: 1rem;
}

.card-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-share {
    background: none;
    border: 1px solid var(--primary);
    color: var(--primary);
    padding: 0.4rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-share:hover {
    background: var(--primary);
    color: white;
}

.btn-read {
    background: var(--primary);
    color: white;
    padding: 0.5rem 1.2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.btn-read:hover {
    background: var(--primary-light);
}

/* Empty State */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    font-size: 1.2rem;
    color: var(--text-light);
}

/* Footer */
.footer {
    background: var(--card-bg);
    box-shadow: 0 -4px 20px rgba(0,0,0,0.05);
    padding: 3rem 1.5rem 1.5rem;
    margin-top: 3rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-col h4 {
    color: var(--primary);
    margin-bottom: 1rem;
}

.footer-col a {
    display: block;
    color: var(--text-light);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--primary);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    font-size: 1.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid rgba(0,0,0,0.05);
    color: var(--text-light);
}

.footer-bottom a {
    color: var(--primary);
}

/* Admin */
.admin-page {
    background: var(--bg);
}

.admin-nav {
    background: var(--card-bg);
    box-shadow: var(--shadow);
    padding: 1rem 0;
}

.admin-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.admin-links {
    display: flex;
    gap: 1rem;
}

.admin-links a {
    color: var(--text);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
}

.admin-links a:hover {
    background: var(--primary);
    color: white;
}

.admin-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.admin-section {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.admin-section h2 {
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg);
    padding: 1.5rem;
    border-radius: var(--radius);
    text-align: center;
}

.stat-card h3 {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.stat-card p {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 0.5rem;
}

.heatmap-item {
    padding: 0.8rem;
    border-radius: 8px;
    color: white;
    text-align: center;
    transition: var(--transition);
}

.heatmap-item small {
    display: block;
    font-size: 0.75rem;
    opacity: 0.8;
}

.admin-form {
    background: var(--bg);
    padding: 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 2rem;
}

.admin-form h3 {
    margin-bottom: 1rem;
    color: var(--primary);
}

.admin-form input,
.admin-form textarea,
.admin-form select {
    width: 100%;
    padding: 0.8rem;
    margin-bottom: 1rem;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text);
    font-size: 1rem;
}

.admin-form button {
    background: var(--primary);
    color: white;
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
}

.admin-form button:hover {
    background: var(--primary-light);
}

.article-list table {
    width: 100%;
    border-collapse: collapse;
}

.article-list th,
.article-list td {
    padding: 0.8rem;
    text-align: left;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.article-list th {
    color: var(--primary);
    font-weight: 600;
}

.article-list td a {
    color: #e74c3c;
    text-decoration: none;
}

.admin-message {
    background: #27ae60;
    color: white;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: var(--bg);
}

.login-card {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    max-width: 400px;
    width: 100%;
}

.login-card h2 {
    text-align: center;
    color: var(--primary);
    margin-bottom: 2rem;
}

.login-card input {
    width: 100%;
    padding: 0.8rem;
    margin-bottom: 1rem;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
}

.login-card button {
    width: 100%;
    padding: 0.8rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
}

.login-card a {
    display: block;
    text-align: center;
    margin-top: 1rem;
    color: var(--primary);
}

.error {
    color: #e74c3c;
    text-align: center;
    margin-bottom: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: static;
    }
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card-bg);
        padding: 1rem;
        box-shadow: var(--shadow);
    }
    .nav-links.active {
        display: flex;
    }
    .hamburger {
        display: block;
    }
    .hero-content h1 {
        font-size: 2rem;
    }
    .content-grid {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}