/* 
 * Custom CSS - Aplikasi Pemantauan Tugas Siswa
 * Simple PHP Architecture Styling
 */

:root {
    --primary-color: #4f46e5;
    --secondary-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --dark-color: #1f2937;
    --light-color: #f8fafc;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --gradient-warning: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --border-radius: 0.75rem;
}

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

/* Custom Card Styles */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

/* Hero Section */
.hero-section {
    background: var(--gradient-primary);
    color: white;
    padding: 4rem 0;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="20" cy="80" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="30" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

/* TOP RANK Section */
.top-rank-section {
    margin: 2rem 0;
}

.rank-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.rank-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.rank-card.rank-1::before {
    background: linear-gradient(90deg, #ffd700, #ffed4e);
}

.rank-card.rank-2::before {
    background: linear-gradient(90deg, #c0c0c0, #e5e5e5);
}

.rank-card.rank-3::before {
    background: linear-gradient(90deg, #cd7f32, #e6a85c);
}

.rank-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.rank-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 0.5rem;
}

.rank-card.rank-1 .rank-number {
    color: #ffd700;
    font-size: 2.5rem;
}

.rank-card.rank-2 .rank-number {
    color: #c0c0c0;
    font-size: 2.25rem;
}

.rank-card.rank-3 .rank-number {
    color: #cd7f32;
    font-size: 2.15rem;
}

.student-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-color);
    margin: 0 auto 1rem;
    display: block;
    box-shadow: var(--shadow-md);
}

.rank-card.rank-1 .student-avatar {
    border-color: #ffd700;
    width: 90px;
    height: 90px;
}

.student-name {
    font-size: 1.25rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.student-score {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    color: var(--success-color);
    margin-bottom: 0.5rem;
}

.student-stats {
    display: flex;
    justify-content: space-around;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    display: block;
}

.stat-label {
    font-size: 0.75rem;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Badges & Icons */
.crown-icon {
    position: absolute;
    top: -10px;
    right: 10px;
    font-size: 2rem;
    color: #ffd700;
    transform: rotate(15deg);
}

.achievement-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--gradient-success);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Stats Cards */
.stats-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all 0.3s ease;
}

.stats-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.stats-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.stats-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.stats-label {
    font-size: 1rem;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* Navigation */
.navbar {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95) !important;
    box-shadow: var(--shadow-sm);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color) !important;
}

.nav-link {
    font-weight: 500;
    color: var(--dark-color) !important;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 2rem 0;
    margin-top: 4rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.fade-in-up-delay-1 {
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.fade-in-up-delay-2 {
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.fade-in-up-delay-3 {
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.fade-in-up-delay-4 {
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .rank-card {
        margin-bottom: 1rem;
    }
    
    .student-avatar {
        width: 60px;
        height: 60px;
    }
    
    .rank-card.rank-1 .student-avatar {
        width: 70px;
        height: 70px;
    }
    
    .student-stats {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Utility Classes */
.text-gradient {
    background: var(--gradient-success);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass-effect {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.shadow-hover:hover {
    box-shadow: var(--shadow-lg);
}