/* ========================================
   SHARED VARIABLES
   ======================================== */

:root {
    --primary-dark: #003366;
    --primary-medium: #336699;
    --accent-green: #4CAF50;
    --accent-yellow: #FFEB3B;
    --neutral-light: #F5F5F5;
    --white: #FFFFFF;
    --text-primary: #1a1a1a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

/* ========================================
   BASE LAYOUT
   ======================================== */

.courses-container {
    margin-bottom: 4rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.section-title {
    color: var(--primary-dark);
    font-size: 2rem;
    font-weight: bold;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-icon {
    color: var(--primary-medium);
    font-size: 1.75rem;
}

.courses-count {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

/* ========================================
   BUTTON STYLES
   ======================================== */

.btn-primary-custom {
    background: var(--primary-medium);
    color: white;
    border: none;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary-custom:hover {
    background: var(--primary-dark);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(51, 102, 153, 0.25);
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
    .section-title {
        font-size: 1.5rem;
    }

    .courses-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}