/* Main CSS - Non-critical styles */

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-light);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes growLine {
    from { opacity: 0; transform: translateX(-50%) scaleX(0); }
    to { opacity: 1; transform: translateX(-50%) scaleX(1); }
}

@keyframes cardFadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Header animations */
.header {
    opacity: 0;
    animation: fadeIn 0.8s ease forwards;
}

.header h1::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: clamp(60px, 10vw, 100px);
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--success));
    border-radius: var(--radius-sm);
    animation: growLine 1s ease forwards 0.3s;
    opacity: 0;
}

/* Card animations */
.link-card {
    opacity: 0;
    animation: cardFadeIn 0.6s ease forwards;
    transform: translateY(20px);
    transition: var(--transition-base);
}

.link-card:nth-child(1) { animation-delay: 0.1s; }
.link-card:nth-child(2) { animation-delay: 0.2s; }
.link-card:nth-child(3) { animation-delay: 0.3s; }
.link-card:nth-child(4) { animation-delay: 0.4s; }
.link-card:nth-child(5) { animation-delay: 0.5s; }
.link-card:nth-child(6) { animation-delay: 0.6s; }
.link-card:nth-child(7) { animation-delay: 0.7s; }

/* Card hover effects */
.link-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-hover, 0 12px 28px rgba(0,0,0,0.15));
    border-color: var(--gray-200);
}

.link-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: var(--transition-base);
}

.link-card:hover::after {
    left: 100%;
}

/* Card color variations */
.link-card[data-category="special"]::before {
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
}

.link-card[data-category="reservation"]::before {
    background: linear-gradient(90deg, var(--success), var(--success-light));
}

.link-card[data-category="app"]::before {
    background: linear-gradient(90deg, var(--danger), var(--danger-light));
}

.link-card[data-category="enrollment"]::before {
    background: linear-gradient(90deg, var(--purple), var(--purple-light));
}

.link-card[data-category="lunch"]::before,
.link-card[data-category="attendance"]::before {
    background: linear-gradient(90deg, var(--warning), var(--warning-light));
}

/* Icon animations */
.link-card .icon {
    transition: var(--transition-fast, all 0.2s cubic-bezier(0.4, 0, 0.2, 1));
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.08));
}

.link-card:hover .icon {
    transform: scale(1.15);
    filter: drop-shadow(0 6px 12px rgba(0,0,0,0.12));
}

/* Icon colors */
.icon-special { color: var(--primary); }
.icon-reserve { color: var(--success); }
.icon-app { color: var(--danger); }
.icon-lunch { color: var(--warning); }
.icon-new-student { color: var(--purple); }

/* Button variations */
.link-btn.success { background: var(--success); }
.link-btn.success:hover { background: #00a025; }

.link-btn.danger { background: var(--danger); }
.link-btn.danger:hover { background: #e03535; }

.link-btn.warning { background: var(--warning); }
.link-btn.warning:hover { background: #e67000; }

.link-btn.purple { background: var(--purple); }
.link-btn.purple:hover { background: #8568b8; }

.link-btn:hover {
    box-shadow: 0 6px 16px rgba(64, 158, 255, 0.3);
}

/* Button ripple effect */
.link-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.link-btn:active::after {
    width: 300px;
    height: 300px;
}

/* Focus styles for accessibility */
.link-btn:focus-visible,
a:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .link-card-group {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: 20px;
    }
    
    .link-card {
        padding: 28px 20px;
    }
    
    .link-card .icon {
        font-size: 40px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 20px 10px;
    }
    
    .header {
        margin-bottom: 30px;
    }
    
    .link-card {
        padding: 24px 16px;
    }
    
    .link-card .icon {
        font-size: 36px;
        margin-bottom: 16px;
    }
    
    .link-card p {
        min-height: auto;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .link-card {
        border: 2px solid var(--gray-800);
    }
    
    .link-btn {
        border: 2px solid currentColor;
    }
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
    :root {
        --gray-50: #1a1a1a;
        --gray-100: #2d2d2d;
        --gray-800: #f0f0f0;
        --white: #2d2d2d;
    }
    
    body {
        background: linear-gradient(180deg, #1a1a1a 0%, #2d2d2d 100%);
        color: #f0f0f0;
    }
    
    .link-card {
        background: #2d2d2d;
        color: #f0f0f0;
    }
    
    .link-card h2 {
        color: #f0f0f0;
    }
    
    .link-card p {
        color: #b0b0b0;
    }
}