:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #10b981;
    --text-main: #334155;
    --text-muted: #64748b;
    --bg-light: #f8fafc;
    --bg-dark: #0f172a;
    --border-color: #e2e8f0;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-light);
}

.navbar {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.hero-section {
    background: linear-gradient(135deg, var(--bg-dark), #1e293b);
    color: #fff;
    padding: 100px 0;
}

.course-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.course-thumbnail {
    position: relative;
    overflow: hidden;
}

.course-thumbnail img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.badge-overlay {
    position: absolute;
    top: 10px;
    left: 10px;
}

.price-tag {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.category-card {
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    background-color: #fff;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.category-card:hover {
    border-color: var(--primary-color);
    background-color: rgba(79, 70, 229, 0.05);
}

.dashboard-widget {
    background-color: #fff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover), var(--primary-color));
}

.rating-stars {
    color: #fbbf24;
}

.avatar-rounded {
    border-radius: 50%;
    object-fit: cover;
}

.avatar-sm { width: 32px; height: 32px; }
.avatar-md { width: 48px; height: 48px; }
.avatar-lg { width: 64px; height: 64px; }

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f1f1f1;
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}