/**
 * Custom Styles
 * Main stylesheet for the application
 */

: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;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* Navigation */
.navbar-brand {
    font-weight: 600;
}

.navbar-nav .nav-link {
    padding: 0.5rem 1rem;
    transition: background-color 0.3s;
}

.navbar-nav .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

/* Cards */
.card {
    border: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s;
}

.card:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.card-header {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    border-bottom: none;
}

/* Progress Bar */
.progress {
    height: 25px;
    border-radius: 5px;
}

.progress-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

/* Buttons */
.btn {
    border-radius: 5px;
    padding: 0.5rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Forms */
.form-control, .form-select {
    border-radius: 5px;
    border: 1px solid #ced4da;
    padding: 0.5rem 0.75rem;
}

.form-control:focus, .form-select: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;
}

/* Tables */
.table {
    background-color: white;
    border-radius: 5px;
    overflow: hidden;
}

.table thead {
    background-color: var(--primary-color);
    color: white;
}

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

/* Badges */
.badge {
    padding: 0.5em 0.75em;
    font-weight: 500;
}

/* Alerts */
.alert {
    border-radius: 5px;
    border: none;
}

/* Dashboard Stats */
.stat-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
    color: white;
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.stat-card h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
}

.stat-card p {
    margin: 0.5rem 0 0 0;
    opacity: 0.9;
}

.stat-card.success {
    background: linear-gradient(135deg, var(--success-color) 0%, #0f5132 100%);
}

.stat-card.warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #ff9800 100%);
    color: var(--dark-color);
}

.stat-card.info {
    background: linear-gradient(135deg, var(--info-color) 0%, #087990 100%);
}

/* Training Progress */
.week-card {
    border-left: 4px solid var(--primary-color);
    margin-bottom: 1rem;
}

.week-card.completed {
    border-left-color: var(--success-color);
}

.week-card.in-progress {
    border-left-color: var(--warning-color);
}

.lesson-item {
    padding: 0.75rem;
    border-bottom: 1px solid #e9ecef;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.lesson-item:last-child {
    border-bottom: none;
}

.lesson-item.completed {
    background-color: #d1e7dd;
}

.lesson-item.in-progress {
    background-color: #fff3cd;
}

/* Practice Questions */
.question-card {
    background-color: white;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.question-number {
    display: inline-block;
    width: 30px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: 600;
    margin-right: 1rem;
}

.option-item {
    padding: 0.75rem;
    margin: 0.5rem 0;
    border: 2px solid #e9ecef;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
}

.option-item:hover {
    border-color: var(--primary-color);
    background-color: #f8f9fa;
}

.option-item.selected {
    border-color: var(--primary-color);
    background-color: #e7f1ff;
}

.option-item.correct {
    border-color: var(--success-color);
    background-color: #d1e7dd;
}

.option-item.incorrect {
    border-color: var(--danger-color);
    background-color: #f8d7da;
}

/* Loading Spinner */
.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Footer */
footer {
    margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .stat-card h3 {
        font-size: 2rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #0056b3;
}