:root {
    --primary-color: #2563eb;
    --primary-light: #dbeafe;
    --bg-color: #f8fafc;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --card-bg: #ffffff;
    --header-bg: #0f172a;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Vazirmatn', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    direction: rtl;
    overflow-x: hidden; /* Prevents side-scrolling on mobile */
}

header {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: white;
    padding: 40px 20px 80px 20px;
    text-align: center;
}

header h1 { margin: 0; font-size: clamp(1.5rem, 5vw, 2.5rem); }

.container {
    max-width: 1100px;
    margin: -40px auto 40px;
    padding: 0 15px;
}

.search-box {
    width: 100%;
    padding: 15px 20px;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    font-size: 1rem;
    font-family: inherit;
    outline: none;
}

.category-title {
    font-size: 1.3rem;
    margin: 30px 0 20px 0;
    padding-right: 12px;
    border-right: 4px solid var(--primary-color);
}

/* --- Responsive Grid Fix --- */
.video-grid {
    display: grid;
    /* This creates 2 columns on desktop, 1 on mobile automatically */
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); 
    gap: 20px;
}

.video-card {
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
}

.video-info { padding: 15px; }
.video-title { margin-top: 8px; font-size: 1.1rem; font-weight: bold; }

/* Aparat Video Container */
.video-wrapper {
    position: relative;
    padding: 0 10px 10px 10px;
    width: 100%;
}

.video-description { border-top: 1px solid #f1f5f9; background: #fafafa; }
summary { padding: 12px 15px; cursor: pointer; color: var(--primary-color); font-size: 0.9rem; }
.description-content { padding: 0 15px 15px 15px; font-size: 0.85rem; color: var(--text-muted); }

/* --- Mobile Specific Fixes --- */
@media (max-width: 600px) {
    header { padding: 30px 15px 60px 15px; }
    
    .video-grid {
        grid-template-columns: 1fr; /* Force single column */
    }

    .container {
        margin-top: -30px;
    }

    .video-title { font-size: 1rem; }
}