/* Global Styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --light-bg: #f8f9fa;
    --dark-bg: #2c3e50;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f6f9;
}

/* Navigation */
.navbar {
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

.navbar-brand i {
    margin-right: 10px;
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    transition: all 0.3s ease;
}

.nav-link i {
    margin-right: 5px;
}

.nav-link:hover {
    transform: translateY(-2px);
}

/* Carousel */
.carousel {
    margin-bottom: 2rem;
}

.carousel-item {
    height: 400px;
}

.carousel-item img {
    object-fit: cover;
    height: 100%;
    width: 100%;
}

.carousel-caption {
    background: rgba(0,0,0,0.6);
    padding: 2rem;
    border-radius: 10px;
    bottom: 20%;
}

.carousel-caption h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

/* Cards */
.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    font-weight: 600;
    color: var(--primary-color);
}

.card-title i {
    color: var(--secondary-color);
    margin-right: 10px;
}

/* Forms */
.form-section {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
}

.form-section h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--secondary-color);
}

.form-control {
    border-radius: 10px;
    border: 1px solid #e0e0e0;
    padding: 0.75rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.form-label {
    font-weight: 500;
    color: var(--primary-color);
}

/* Buttons */
.btn {
    border-radius: 30px;
    padding: 0.6rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
}

.btn-primary:hover {
    background: #2980b9;
    border-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

/* Footer */
footer {
    background: var(--dark-bg);
    color: #ecf0f1;
}

footer h5 {
    color: white;
    margin-bottom: 1rem;
}

footer a {
    transition: all 0.3s ease;
}

footer a:hover {
    color: white !important;
    text-decoration: none;
    padding-left: 5px;
}

/* Responsive */
@media (max-width: 768px) {
    .carousel-item {
        height: 250px;
    }
    
    .carousel-caption h3 {
        font-size: 1.5rem;
    }
    
    .carousel-caption p {
        font-size: 0.9rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .form-section {
        padding: 1rem;
    }
}

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

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

/* Admin Specific */
.admin-panel {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.admin-panel .stat-card {
    background: var(--light-bg);
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
}

.admin-panel .stat-card i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

/* Loading spinner */
.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.spinner-overlay .spinner-border {
    width: 3rem;
    height: 3rem;
}
/* Additional styles for all pages */

/* Form sections */
.form-section {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 5px 30px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
    transition: all 0.3s ease;
}

.form-section:hover {
    box-shadow: 0 8px 40px rgba(0,0,0,0.12);
}

.form-section h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 3px solid var(--secondary-color);
    font-weight: 600;
}

.form-section h2 i {
    color: var(--secondary-color);
    margin-right: 10px;
}

/* Form controls */
.form-control {
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.form-control:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.form-control-file {
    padding: 0.5rem 0;
}

.form-label {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.form-text {
    color: #6c757d;
    font-size: 0.85rem;
}

/* Subject rows */
.subject-row {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    border: 1px solid #e9ecef;
}

/* Add/Remove buttons */
.add-subject-btn, .remove-subject {
    border-radius: 20px;
    padding: 0.25rem 1rem;
    font-size: 0.85rem;
}

/* Alerts */
.alert {
    border-radius: 10px;
    border: none;
    padding: 1rem 1.5rem;
}

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

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

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

/* Payment info */
.payment-info {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 10px;
    margin-top: 1rem;
}

.payment-info i {
    font-size: 2rem;
    margin-right: 1rem;
}

/* Registration status */
.status-badge {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.85rem;
}

.status-badge.pending {
    background: #fff3cd;
    color: #856404;
}

.status-badge.approved {
    background: #d4edda;
    color: #155724;
}

.status-badge.rejected {
    background: #f8d7da;
    color: #721c24;
}

/* Loading spinner */
.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.spinner-overlay.show {
    display: flex;
}

.spinner-overlay .spinner-border {
    width: 4rem;
    height: 4rem;
    border-width: 0.3rem;
}

/* Print styles */
@media print {
    .navbar, .btn, .no-print {
        display: none !important;
    }
    
    .form-section {
        box-shadow: none !important;
        border: 1px solid #ddd;
    }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .form-section {
        padding: 1.5rem;
    }
    
    .form-row {
        margin: 0;
    }
    
    .form-row .form-group {
        padding: 0;
    }
}

/* Animation classes */
.fade-in {
    animation: fadeInUp 0.6s ease-out;
}

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

/* Password strength indicator */
.password-strength {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.85rem;
}

.password-strength.weak {
    color: #dc3545;
}

.password-strength.moderate {
    color: #ffc107;
}

.password-strength.strong {
    color: #28a745;
}

/* File upload preview */
.file-preview {
    margin-top: 0.5rem;
    max-width: 200px;
}

.file-preview img {
    max-width: 100%;
    border-radius: 8px;
    border: 1px solid #ddd;
}