:root {
    --primary-dark: #1A202C;
    --primary-accent: #2B6CB0;
    --secondary-accent: #D69E2E;
    --bg-light: #F7FAFC;
    --text-main: #4A5568;
    --white: #FFFFFF;
    --surface-bg: #FFFFFF;
    --card-bg: #f4f1ea;
    --heading-color: #1A202C;
    --border-color: #EDF2F7;
    --table-border: #E2E8F0;
    --hero-subtitle: #E2E8F0;
    --navbar-shadow: rgba(0, 0, 0, 0.05);
    --card-shadow: rgba(0, 0, 0, 0.15);
    --article-shadow: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] {
    --primary-dark: #E2E8F0;
    --primary-accent: #63B3ED;
    --secondary-accent: #F6AD55;
    --bg-light: #1A202C;
    --text-main: #CBD5E0;
    --white: #FFFFFF;
    --surface-bg: #2D3748;
    --card-bg: #2D3748;
    --heading-color: #F7FAFC;
    --border-color: #4A5568;
    --table-border: #4A5568;
    --hero-subtitle: #E2E8F0;
    --navbar-shadow: rgba(0, 0, 0, 0.3);
    --card-shadow: rgba(0, 0, 0, 0.4);
    --article-shadow: rgba(0, 0, 0, 0.3);
}

body { font-family: 'Roboto', sans-serif; background-color: var(--bg-light); color: var(--text-main); margin: 0; line-height: 1.6; transition: background-color 0.3s, color 0.3s; }
h1, h2 { font-family: 'Playfair Display', serif; color: var(--heading-color); }

.navbar { background: var(--surface-bg); padding: 15px 5%; display: flex; justify-content: space-between; align-items: center; box-shadow: 0 2px 4px var(--navbar-shadow); transition: background-color 0.3s; }
.logo { font-family: 'Playfair Display', serif; font-size: 1.5rem; font-weight: 700; color: var(--heading-color); text-decoration: none; }
.logo span { color: var(--secondary-accent); }
.nav-links { display: flex; align-items: center; gap: 20px; }
.nav-links a { font-weight: bold; color: var(--secondary-accent); text-decoration: none; }
.theme-toggle { background: none; border: 2px solid var(--secondary-accent); border-radius: 8px; padding: 6px 12px; font-size: 1.1rem; cursor: pointer; line-height: 1; transition: background-color 0.2s; }
.theme-toggle:hover { background-color: rgba(214, 158, 46, 0.15); }

.hero { background: linear-gradient(135deg, #1A202C, #2D3748); color: var(--white); padding: 60px 5% 40px; text-align: center; }
.hero h1 { color: var(--white); margin-bottom: 15px; }
.hero-subtitle { color: var(--hero-subtitle); margin: 0 0 30px; }

.search-wrapper { max-width: 480px; margin: 0 auto; }
.search-input {
    width: 100%;
    padding: 14px 20px;
    font-size: 1rem;
    font-family: 'Roboto', sans-serif;
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    box-sizing: border-box;
    transition: border-color 0.2s, background-color 0.2s;
}
.search-input::placeholder { color: rgba(255, 255, 255, 0.6); }
.search-input:focus { outline: none; border-color: var(--secondary-accent); background: rgba(255, 255, 255, 0.15); }

.grid-container { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 30px; padding: 40px 5%; max-width: 1200px; margin: auto; }
.no-results { grid-column: 1 / -1; text-align: center; font-size: 1.1rem; color: var(--text-main); padding: 40px 0; display: none; }
.no-results.visible { display: block; }

.card {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--card-bg);
    border-radius: 12px;
    padding-bottom: 15px;
    transition: transform 0.3s, background-color 0.3s;
}
.card:hover { transform: translateY(-5px); }
.card.hidden { display: none; }
.card-img { width: 100%; height: 250px; background-size: cover; background-position: top center; border-radius: 12px 12px 0 0; box-shadow: 0 4px 10px var(--card-shadow); }
.card-name { margin-top: 15px; font-family: 'Playfair Display', serif; font-size: 1.3rem; font-weight: 700; color: var(--heading-color); text-align: center; padding: 0 10px; }

.article-container { max-width: 900px; margin: 40px auto; padding: 40px; background: var(--surface-bg); border-radius: 8px; box-shadow: 0 4px 15px var(--article-shadow); transition: background-color 0.3s; }
.back-btn { display: inline-block; margin-bottom: 30px; font-weight: 500; color: var(--primary-accent); text-decoration: none; }

.article-header { display: flex; gap: 30px; margin-bottom: 40px; align-items: flex-start; }
.article-image { width: 250px; border-radius: 8px; box-shadow: 0 4px 10px var(--card-shadow); object-fit: cover; }
.article-meta { flex: 1; width: 100%; }
.article-meta h1 { font-size: 2.5rem; margin-top: 0; margin-bottom: 5px; }
.article-meta table { width: 100%; border-collapse: collapse; margin-top: 15px; }
.article-meta th, .article-meta td { padding: 12px; text-align: left; border-bottom: 1px solid var(--border-color); }
.article-meta th { width: 130px; color: var(--primary-accent); font-weight: 500; }

.markdown-content h2 { border-bottom: 2px solid var(--secondary-accent); padding-bottom: 10px; margin-top: 40px; margin-bottom: 20px; }
.markdown-content table { width: 100%; border-collapse: collapse; margin: 20px 0; background: var(--bg-light); border-radius: 8px; overflow: hidden; }
.markdown-content th, .markdown-content td { padding: 12px; border: 1px solid var(--table-border); text-align: left; }
.markdown-content th { background: #1A202C; color: var(--white); }
.markdown-content a { color: var(--primary-accent); text-decoration: none; border-bottom: 1px solid var(--secondary-accent); }
.markdown-content a:hover { color: var(--secondary-accent); }

@media (max-width: 600px) {
    .article-header { flex-direction: column; align-items: center; }
    .article-image { width: 100%; max-width: 300px; }
    .nav-links { gap: 12px; }
}