/* Custom CSS for LMS Platform */

:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --info-color: #0dcaf0;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #212529;
}

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

/* Navigation */
.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Cards */
.card {
    border: none;
    border-radius: 10px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid #dee2e6;
    border-radius: 10px 10px 0 0 !important;
}

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

.progress-bar {
    border-radius: 4px;
    transition: width 0.6s ease;
}

/* Buttons */
.btn {
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, #0d6efd, #0b5ed7);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0b5ed7, #0a58ca);
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, #198754, #157347);
    border: none;
}

.btn-success:hover {
    background: linear-gradient(135deg, #157347, #146c43);
    box-shadow: 0 4px 12px rgba(25, 135, 84, 0.3);
}

/* Dashboard Cards */
.card.bg-primary,
.card.bg-success,
.card.bg-warning,
.card.bg-info {
    border: none;
    border-radius: 10px;
    transition: transform 0.3s ease;
}

.card.bg-primary:hover,
.card.bg-success:hover,
.card.bg-warning:hover,
.card.bg-info:hover {
    transform: translateY(-3px);
}

/* Forms */
.form-control {
    border-radius: 6px;
    border: 1px solid #ced4da;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-control:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.input-group-text {
    background-color: #f8f9fa;
    border: 1px solid #ced4da;
    border-radius: 6px 0 0 6px;
}

/* Alerts */
.alert {
    border: none;
    border-radius: 8px;
    border-left: 4px solid;
}

.alert-danger {
    border-left-color: var(--danger-color);
    background-color: #f8d7da;
}

.alert-success {
    border-left-color: var(--success-color);
    background-color: #d1e7dd;
}

.alert-info {
    border-left-color: var(--info-color);
    background-color: #d1ecf1;
}

.alert-warning {
    border-left-color: var(--warning-color);
    background-color: #fff3cd;
}

/* Tabs */
.nav-tabs {
    border-bottom: 2px solid #dee2e6;
}

.nav-tabs .nav-link {
    border: none;
    border-radius: 8px 8px 0 0;
    margin-right: 5px;
    color: #6c757d;
    transition: all 0.3s ease;
}

.nav-tabs .nav-link:hover {
    border-color: transparent;
    color: var(--primary-color);
    background-color: #f8f9fa;
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    background-color: white;
    border-bottom: 2px solid var(--primary-color);
}

/* List Groups */
.list-group-item {
    border: 1px solid #dee2e6;
    border-radius: 8px !important;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.list-group-item:hover {
    background-color: #f8f9fa;
    transform: translateX(5px);
}

/* Badges */
.badge {
    font-size: 0.75rem;
    padding: 0.5em 0.75em;
    border-radius: 6px;
}

/* Course Cards */
.course-card {
    transition: all 0.3s ease;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .btn {
        font-size: 0.9rem;
        padding: 0.5rem 1rem;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-soft {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.border-soft {
    border: 1px solid rgba(0, 0, 0, 0.1);
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

.slide-in-left {
    animation: slideInLeft 0.5s ease-out;
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

.slide-in-right {
    animation: slideInRight 0.5s ease-out;
}

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