/* ========================
   PPDB - Styling
   ======================== */

:root {
    --primary: #667eea;
    --secondary: #764ba2;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --info: #17a2b8;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: #333;
}

/* ========================
   Navbar Styling
   ======================== */

.navbar {
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
}

.navbar-brand {
    font-weight: bold;
    font-size: 20px;
}

.navbar-brand i {
    margin-right: 8px;
}

.nav-link {
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: #ffc107 !important;
    transform: translateY(-2px);
}

/* ========================
   Hero Section
   ======================== */

.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    pointer-events: none;
}

.hero-section h1 {
    font-weight: 700;
    letter-spacing: 1px;
}

.hero-section .lead {
    font-size: 18px;
    line-height: 1.6;
}

/* ========================
   Cards
   ======================== */

.card {
    border: none;
    transition: all 0.3s ease;
    border-radius: 10px;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15) !important;
}

.card-header {
    border-radius: 10px 10px 0 0;
    font-weight: 600;
}

.card-body {
    padding: 25px;
}

/* ========================
   Buttons
   ======================== */

.btn {
    border-radius: 8px;
    padding: 10px 20px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
    color: white;
}

.btn-warning {
    background: #ffc107;
    color: #333;
}

.btn-warning:hover {
    background: #ffb300;
    transform: translateY(-2px);
    color: #333;
}

.btn-lg {
    padding: 15px 30px;
    font-size: 16px;
}

/* ========================
   Forms
   ======================== */

.form-control, .form-select {
    border-radius: 8px;
    border: 2px solid #e9ecef;
    padding: 10px 15px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.form-label {
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
}

.form-label .text-danger {
    margin-left: 4px;
}

/* ========================
   Alerts
   ======================== */

.alert {
    border-radius: 8px;
    border: none;
    padding: 15px 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
}

/* ========================
   Stat Cards
   ======================== */

.stat-card {
    padding: 30px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.stat-card h3 {
    font-size: 36px;
    margin-bottom: 10px;
}

.stat-card p {
    font-size: 14px;
    font-weight: 600;
}

/* ========================
   Tables
   ======================== */

.table {
    background: white;
    border-radius: 8px;
    overflow: hidden;
}

.table thead th {
    background: #f8f9fa;
    border-bottom: 2px solid #e9ecef;
    font-weight: 600;
    color: #667eea;
}

.table tbody tr {
    border-bottom: 1px solid #e9ecef;
    transition: background 0.3s ease;
}

.table tbody tr:hover {
    background: #f8f9fa;
}

/* ========================
   Badges
   ======================== */

.badge {
    border-radius: 20px;
    padding: 8px 15px;
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge.bg-success {
    background: #28a745 !important;
}

.badge.bg-warning {
    background: #ffc107 !important;
    color: #333 !important;
}

/* ========================
   Footer
   ======================== */

footer {
    border-top: 1px solid #e9ecef;
    margin-top: 50px;
}

footer p {
    margin: 5px 0;
}

/* ========================
   Accordion
   ======================== */

.accordion-button {
    border-radius: 8px;
    margin-bottom: 10px;
    font-weight: 600;
    color: #333;
}

.accordion-button:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.25rem rgba(102, 126, 234, 0.25);
}

.accordion-button:not(.collapsed) {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

/* ========================
   Responsive
   ======================== */

@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 28px;
    }

    .stat-card {
        padding: 20px;
    }

    .stat-card h3 {
        font-size: 24px;
    }

    .btn-lg {
        padding: 10px 20px;
        font-size: 14px;
    }
}

/* ========================
   Utilities
   ======================== */

.text-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-sm {
    box-shadow: 0 2px 8px rgba(0,0,0,0.08) !important;
}

.shadow {
    box-shadow: 0 4px 15px rgba(0,0,0,0.1) !important;
}

/* Loading spinner */
.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}