/* assets/css/style.css */
:root {
    --primary: #4f46e5;
    --primary-dark: #3730a3;
    --secondary: #10b981;
    --secondary-dark: #059669;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --light: #f8fafc;
    --dark: #1e293b;
    --gray: #64748b;
    --gray-light: #e2e8f0;
    --border-radius: 12px;
    --shadow: 0 10px 30px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--dark);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.main-header {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary);
}

.logo-container h1 {
    color: var(--primary);
    font-size: 2.2rem;
    margin-bottom: 5px;
}

.academic-year-badge {
    background: var(--light);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--gray);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.admin-btn {
    background: var(--primary);
    color: white;
    padding: 12px 24px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.admin-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Year Selector */
.year-selector {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.year-selector h2 {
    margin-bottom: 20px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.year-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.year-btn {
    padding: 12px 24px;
    background: var(--light);
    border: 2px solid var(--gray-light);
    border-radius: var(--border-radius);
    color: var(--dark);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.year-btn:hover, .year-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.year-btn .badge {
    background: var(--secondary);
    color: white;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.8rem;
}

/* Class Selector */
.class-selector {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.level-section {
    margin-bottom: 40px;
}

.level-section h3 {
    color: var(--dark);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--gray-light);
    display: flex;
    align-items: center;
    gap: 10px;
}

.class-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.class-form {
    all: unset;
}

.class-card {
    background: var(--light);
    border: 2px solid var(--gray-light);
    border-radius: var(--border-radius);
    padding: 25px;
    width: 100%;
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    gap: 20px;
    align-items: center;
}

.class-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.class-card.plus2:hover {
    border-color: var(--secondary);
}

.class-icon {
    width: 60px;
    height: 60px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary);
}

.plus2 .class-icon {
    color: var(--secondary);
}

.class-info h4 {
    color: var(--dark);
    margin-bottom: 5px;
    font-size: 1.2rem;
}

.class-info p {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.url-preview {
    font-size: 0.8rem;
    color: var(--primary);
    background: rgba(79, 70, 229, 0.1);
    padding: 8px 12px;
    border-radius: 6px;
    font-family: monospace;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Stats Section */
.stats-section {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.stats-section h2 {
    margin-bottom: 25px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.stat-card {
    background: var(--light);
    border-radius: var(--border-radius);
    padding: 25px;
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.stat-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.stat-card h3 {
    font-size: 1rem;
    color: var(--gray);
    margin-bottom: 10px;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
}

/* Footer */
.main-footer {
    background: white;
    border-radius: var(--border-radius);
    padding: 25px 30px;
    box-shadow: var(--shadow);
    text-align: center;
    color: var(--gray);
}

.main-footer p {
    margin-bottom: 15px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--gray);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
}

/* Flash Messages */
.flash-message {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: var(--border-radius);
    color: white;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-width: 300px;
    max-width: 400px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.flash-success {
    background: var(--secondary);
}

.flash-error {
    background: var(--danger);
}

.flash-warning {
    background: var(--warning);
}

.flash-info {
    background: var(--info);
}

.close-flash {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    margin-left: 15px;
}

/* Responsive */
@media (max-width: 768px) {
    .main-header {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .logo-container {
        flex-direction: column;
        text-align: center;
    }
    
    .class-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .year-buttons {
        flex-direction: column;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 10px;
    }
}