/* custom.css - Additional custom styles */
body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* Loading spinner */
.spinner {
    border: 3px solid rgba(0,0,0,0.1);
    border-radius: 50%;
    border-top: 3px solid #3b82f6;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

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

/* Toast notifications */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 12px 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 9999;
    animation: slideIn 0.3s ease;
}

.toast-success {
    background: #10b981;
    color: white;
}

.toast-error {
    background: #ef4444;
    color: white;
}

.toast-warning {
    background: #f59e0b;
    color: white;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Modal overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9998;
}

.modal-content {
    background: white;
    border-radius: 12px;
    padding: 24px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.dark .modal-content {
    background: #1f2937;
}

/* Chart container */
.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

/* Test option styles */
.option-item {
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.option-item:hover {
    border-color: #3b82f6;
    background: #eff6ff;
}

.option-item.selected {
    border-color: #3b82f6;
    background: #dbeafe;
}

.dark .option-item {
    border-color: #4b5563;
}

.dark .option-item:hover {
    border-color: #60a5fa;
    background: #1e3a8a;
}

.dark .option-item.selected {
    border-color: #60a5fa;
    background: #1e3a8a;
}

/* Lock icon for tests */
.test-locked {
    position: relative;
}

.test-locked::before {
    content: '\f023';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    top: 10px;
    right: 10px;
    color: #6b7280;
    font-size: 20px;
}

/* Badge styles */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

/* Rank card */
.rank-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 24px;
    border-radius: 16px;
    text-align: center;
}

.rank-number {
    font-size: 48px;
    font-weight: 700;
    margin: 16px 0;
}