:root {
    --font-sans: 'Inter', sans-serif;
    --primary-gradient: linear-gradient(to right, #B8860B, #DAA520);
    --text-color: #111827;
    --bg-color: #ffffff;
    --bg-color-rgb: 255, 255, 255;
    --card-bg: #f9fafb;
    --border-color: #e5e7eb;
    --accent-color: #B8860B;
}

[data-theme="dark"] {
    --primary-gradient: linear-gradient(to right, #B8860B, #DAA520);
    --text-color: #f0f0f0;
    --bg-color: #000000;
    --bg-color-rgb: 0, 0, 0;
    --card-bg: #1A1A1A;
    --border-color: #2C2C2C;
    --accent-color: #DAA520;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

header {
    position: sticky;
    top: 0;
    z-index: 10;
    background-color: rgba(var(--bg-color-rgb), 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(var(--border-color), 0.5);
    padding: 1rem 2rem;
    transition: background-color 0.3s, border-color 0.3s;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

#dark-mode-toggle {
    background: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
}

main {
    padding: 2rem;
}

.hero {
    text-align: center;
    padding: 5rem 2rem;
    border-radius: 10px;
    background: radial-gradient(ellipse at bottom, var(--card-bg), var(--bg-color));
}

.hero h1 {
    font-size: 2.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.topic-card {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.5rem;
    transition: transform 0.2s, background 0.2s;
}

.topic-card:hover {
    transform: translateY(-5px);
    background: var(--card-bg);
}

.topic-card h3 {
    margin-top: 0;
    color: var(--accent-color);
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 5px;
    text-decoration: none;
    color: #000000;
    cursor: pointer;
    font-weight: 500;
}

.btn-primary {
    background: var(--primary-gradient);
}

/* Add other styles from previous version */
nav ul { list-style: none; display: flex; gap: 1rem; margin: 0; padding: 0; }
footer { text-align: center; padding: 2rem; border-top: 1px solid var(--border-color); }
.social-links a { margin: 0 0.5rem; color: var(--text-color); }
.search-bar { margin: 2rem 0; display: flex; justify-content: center; }
.search-bar input { width: 50%; padding: 0.8rem; border: 1px solid var(--border-color); border-radius: 5px; background-color: var(--bg-color); color: var(--text-color); }
.filters { margin-bottom: 2rem; }
.topics-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; }
.topic-card .buttons { margin-top: 1rem; }
.post-header h1 { color: var(--accent-color); }
.video-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; background: #000; margin-bottom: 2rem; border-radius: 10px; }
.video-container iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.qa-accordion .qa-item { border-bottom: 1px solid var(--border-color); }
.qa-accordion .qa-question { width: 100%; background: none; border: none; text-align: left; padding: 1rem; font-size: 1.1rem; font-weight: 500; cursor: pointer; color: var(--text-color); transition: background-color 0.2s; }
.qa-accordion .qa-question:hover { background-color: var(--card-bg); }
.qa-accordion .qa-answer { padding: 0 1rem 1rem; display: none; background-color: var(--card-bg); }
.comments-section { margin-top: 3rem; }
.comment { background: var(--card-bg); padding: 1rem; border-radius: 5px; margin-bottom: 1rem; border-left: 4px solid var(--accent-color); }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.5rem; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 0.8rem; border: 1px solid var(--border-color); border-radius: 5px; background: var(--bg-color); color: var(--text-color); }
@media (max-width: 768px) { nav { flex-direction: column; gap: 1rem; } nav ul { justify-content: center; width: 100%; } .search-bar input { width: 80%; } }