/* Custom CSS for E-Learn Django Project */

/* Root Variables */
:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --white: #ffffff;
    --border-radius: 0.375rem;
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --transition: all 0.15s ease-in-out;
}

/* General Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
}

/* Custom Navbar Styles */
.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: var(--transition);
}

.navbar-nav .nav-link:hover {
    color: rgba(255, 255, 255, 0.8) !important;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color), #0a58ca);
    color: white;
    padding: 80px 0;
    margin-bottom: 50px;
}

.hero-section h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.hero-section p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

/* Card Enhancements */
.card {
    border: none;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.card-img-top {
    height: 200px;
    object-fit: cover;
    transition: var(--transition);
}

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

.card-body {
    padding: 1.5rem;
}

.card-title {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.75rem;
}

.card-text {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

/* Course Cards */
.course-card {
    margin-bottom: 30px;
}

.course-card .card-body {
    position: relative;
}

.course-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--success-color);
    margin-bottom: 1rem;
}

.course-price .original-price {
    text-decoration: line-through;
    color: var(--secondary-color);
    font-size: 1rem;
    margin-left: 10px;
}

/* Button Enhancements */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    border: none;
    padding: 0.75rem 1.5rem;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), #0a58ca);
    box-shadow: 0 2px 4px rgba(13, 110, 253, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(45deg, #0a58ca, var(--primary-color));
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(13, 110, 253, 0.4);
}

.btn-success {
    background: linear-gradient(45deg, var(--success-color), #157347);
    box-shadow: 0 2px 4px rgba(25, 135, 84, 0.3);
}

.btn-success:hover {
    background: linear-gradient(45deg, #157347, var(--success-color));
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(25, 135, 84, 0.4);
}

.btn-danger {
    background: linear-gradient(45deg, var(--danger-color), #b02a37);
    box-shadow: 0 2px 4px rgba(220, 53, 69, 0.3);
}

.btn-danger:hover {
    background: linear-gradient(45deg, #b02a37, var(--danger-color));
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(220, 53, 69, 0.4);
}

/* Form Enhancements */
.form-control {
    border-radius: var(--border-radius);
    border: 1px solid #dee2e6;
    transition: var(--transition);
    padding: 0.75rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

/* Checkout Page */
.checkout-card {
    border: none;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    border-radius: 1rem;
}

.checkout-card .card-body {
    padding: 2rem;
}

.course-summary {
    background: var(--light-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
}

.course-summary h5 {
    color: var(--dark-color);
    font-weight: 600;
}

.course-summary .price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--success-color);
}

/* Table Enhancements */
.table {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.table thead th {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
    border: none;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background: rgba(13, 110, 253, 0.05);
}

/* Footer */
footer {
    background: var(--dark-color) !important;
}

footer h5, footer h6 {
    color: var(--primary-color);
    font-weight: 600;
}

footer a {
    transition: var(--transition);
}

footer a:hover {
    color: var(--primary-color) !important;
}

.social-links a {
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    transform: translateY(-2px);
}

/* Loading Spinner */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Alerts */
.alert {
    border-radius: var(--border-radius);
    border: none;
    font-weight: 500;
}

.alert-success {
    background: linear-gradient(45deg, #d1e7dd, #a3d9a3);
    color: #0f5132;
}

.alert-danger {
    background: linear-gradient(45deg, #f8d7da, #f5c2c7);
    color: #842029;
}

/* Breadcrumb */
.breadcrumb {
    background: var(--light-color);
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: ">";
    color: var(--secondary-color);
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2rem;
    }

    .hero-section p {
        font-size: 1rem;
    }

    .card-body {
        padding: 1rem;
    }

    .btn {
        padding: 0.5rem 1rem;
    }
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(45deg, var(--primary-color), #0a58ca);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-custom {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;
}

.rounded-custom {
    border-radius: 1rem !important;
}

.border-custom {
    border: 2px solid var(--primary-color) !important;
}

/* Course Detail Page */
.course-detail-img {
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.course-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1rem 0;
    color: var(--secondary-color);
}

.course-meta i {
    color: var(--primary-color);
}

/* Login Page */
.login-container {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    max-width: 400px;
    width: 100%;
}

.google-btn {
    background: #db4437;
    color: white;
    border: none;
    transition: var(--transition);
}

.google-btn:hover {
    background: #c23321;
    color: white;
    transform: translateY(-1px);
}

/* Price Badge */
.price-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--success-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    font-weight: 600;
}

/* Course Rating */
.rating {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.rating .star {
    color: #ffc107;
}

.rating .star.empty {
    color: #e9ecef;
}

/* Progress Bar */
.progress-custom {
    height: 8px;
    border-radius: 4px;
    background: #e9ecef;
}

.progress-custom .progress-bar {
    border-radius: 4px;
    background: linear-gradient(45deg, var(--primary-color), #0a58ca);
}