/* QS Assessment System - Custom Styles */

/* Global Styles */
:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    --light-color: #f8fafc;
    --dark-color: #1e293b;
    --border-radius: 8px;
    --box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f8fafc;
    color: #334155;
}

/* Custom Card Styles */
.card {
    border: none;
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transform: translateY(-1px);
}

.card-header {
    background-color: white;
    border-bottom: 1px solid #e2e8f0;
    font-weight: 600;
    color: var(--dark-color);
}

/* Sidebar Styles */
.sidebar {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1d4ed8 100%);
    min-height: 100vh;
    color: white;
    padding: 0;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 12px 20px;
    border-radius: 6px;
    margin: 2px 10px;
    transition: all 0.3s ease;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    transform: translateX(5px);
}

.sidebar .nav-link i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

/* Header Styles */
.main-header {
    background: white;
    box-shadow: var(--box-shadow);
    border-bottom: 1px solid #e2e8f0;
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
    font-size: 1.5rem;
}

/* Button Styles */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    padding: 8px 16px;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background-color: #1d4ed8;
    border-color: #1d4ed8;
    transform: translateY(-1px);
}

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

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

/* Form Styles */
.form-control,
.form-select {
    border-radius: var(--border-radius);
    border: 1px solid #d1d5db;
    padding: 10px 12px;
    transition: all 0.3s ease;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.25);
}

.form-label {
    font-weight: 500;
    color: var(--dark-color);
    margin-bottom: 6px;
}

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

.table thead th {
    background-color: #f8fafc;
    border-bottom: 2px solid #e2e8f0;
    font-weight: 600;
    color: var(--dark-color);
    padding: 12px 15px;
}

.table tbody td {
    padding: 12px 15px;
    vertical-align: middle;
}

.table tbody tr:hover {
    background-color: #f8fafc;
}

/* Badge Styles */
.badge {
    padding: 6px 12px;
    font-weight: 500;
    border-radius: 20px;
}

/* Assessment Specific Styles */
.question-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--box-shadow);
}

.question-header {
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.question-text {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.option-item {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: var(--border-radius);
    padding: 12px 15px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.option-item:hover {
    background: #e2e8f0;
    border-color: var(--primary-color);
}

.option-item.selected {
    background: rgba(37, 99, 235, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.option-item input[type="radio"],
.option-item input[type="checkbox"] {
    margin-right: 10px;
}

/* Timer Styles */
.timer-container {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    padding: 15px 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    z-index: 1000;
    border-left: 4px solid var(--warning-color);
}

.timer-text {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--warning-color);
}

.timer-warning {
    border-left-color: var(--danger-color);
}

.timer-warning .timer-text {
    color: var(--danger-color);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

/* Progress Bar */
.progress {
    border-radius: var(--border-radius);
    background-color: #e2e8f0;
}

.progress-bar {
    transition: width 0.6s ease;
}

/* Navigation Pills */
.nav-pills .nav-link {
    border-radius: var(--border-radius);
    color: var(--secondary-color);
    font-weight: 500;
}

.nav-pills .nav-link.active {
    background-color: var(--primary-color);
}

/* Stats Cards */
.stats-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1d4ed8 100%);
    color: white;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.stats-card h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.stats-card p {
    opacity: 0.9;
    margin: 0;
}

.stats-card.success {
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
}

.stats-card.warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #d97706 100%);
}

.stats-card.danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #dc2626 100%);
}

/* Responsive Styles */
@media (max-width: 768px) {
    .sidebar {
        min-height: auto;
    }
    
    .timer-container {
        position: relative;
        top: auto;
        right: auto;
        margin-bottom: 20px;
        width: 100%;
        text-align: center;
    }
    
    .stats-card h3 {
        font-size: 2rem;
    }
}

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Alert Styles */
.alert {
    border: none;
    border-radius: var(--border-radius);
    border-left: 4px solid;
}

.alert-primary { border-left-color: var(--primary-color); }
.alert-success { border-left-color: var(--success-color); }
.alert-warning { border-left-color: var(--warning-color); }
.alert-danger { border-left-color: var(--danger-color); }
.alert-info { border-left-color: var(--info-color); }

/* Code Snippet Styles */
.code-snippet {
    background: #1e293b;
    color: #e2e8f0;
    padding: 20px;
    border-radius: var(--border-radius);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 14px;
    line-height: 1.6;
    overflow-x: auto;
}

/* Proctoring Warning */
.proctoring-warning {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.proctoring-warning strong {
    color: #7f1d1d;
}

/* Question Navigation */
.question-navigation {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 20px;
}

.question-nav-item {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    margin: 5px;
    border-radius: 50%;
    background: #e2e8f0;
    color: var(--dark-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.question-nav-item:hover {
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    transform: scale(1.1);
}

.question-nav-item.current {
    background: var(--primary-color);
    color: white;
}

.question-nav-item.answered {
    background: var(--success-color);
    color: white;
}

.question-nav-item.flagged {
    background: var(--warning-color);
    color: white;
}

/* Main Content Layout */
.flex-grow-1 {
    padding: 0;
    background-color: #f8fafc;
}

.main-header {
    background: white;
    box-shadow: var(--box-shadow);
    border-bottom: 1px solid #e2e8f0;
    padding: 1.5rem 0;
    margin-bottom: 0;
}

.main-header .container-fluid {
    padding: 0 2rem;
}

/* Content Area */
.main-content {
    padding: 2rem;
    min-height: calc(100vh - 80px);
}

/* Fix for admin pages */
.flex-grow-1 > .container-fluid,
.flex-grow-1 > div:not(.main-header) {
    padding: 2rem;
}

/* Cards spacing */
.row .col-xl-3,
.row .col-md-6,
.row .col-md-3 {
    margin-bottom: 1rem;
}