/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.site-header {
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background 0.3s;
}

.nav-menu a:hover {
    background: rgba(255,255,255,0.1);
}

.user-info {
    color: #ecf0f1;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s;
}

.btn:hover {
    background: #2980b9;
}

.btn-primary {
    background: #3498db;
}

.btn-primary:hover {
    background: #2980b9;
}

.btn-secondary {
    background: #95a5a6;
}

.btn-secondary:hover {
    background: #7f8c8d;
}

.btn-success {
    background: #27ae60;
}

.btn-success:hover {
    background: #229954;
}

.btn-danger {
    background: #e74c3c;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1.125rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* Login */
.login-box {
    max-width: 400px;
    margin: 100px auto;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.login-box h2 {
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.subtitle {
    color: #7f8c8d;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: #7f8c8d;
    font-size: 0.875rem;
}

.login-footer {
    margin-top: 1rem;
    text-align: center;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* Dashboard */
.dashboard {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.dashboard h1 {
    margin-bottom: 2rem;
    color: #2c3e50;
}

.dashboard-section {
    margin-bottom: 3rem;
}

.dashboard-section h2 {
    margin-bottom: 1rem;
    color: #34495e;
    border-bottom: 2px solid #3498db;
    padding-bottom: 0.5rem;
}

.tests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.test-card {
    background: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 1.5rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.test-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.test-card h3 {
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.test-card .module {
    color: #3498db;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.test-card .description {
    color: #7f8c8d;
    margin-bottom: 1rem;
}

.test-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: #7f8c8d;
}

/* Tables */
.results-table,
.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.results-table th,
.results-table td,
.admin-table th,
.admin-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.results-table th,
.admin-table th {
    background: #34495e;
    color: white;
    font-weight: 600;
}

.results-table tr:hover,
.admin-table tr:hover {
    background: #f8f9fa;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 500;
}

.badge-success {
    background: #27ae60;
    color: white;
}

.badge-danger {
    background: #e74c3c;
    color: white;
}

.badge-warning {
    background: #f39c12;
    color: white;
}

.badge-primary {
    background: #3498db;
    color: white;
}

.badge-secondary {
    background: #95a5a6;
    color: white;
}

/* Test Interface */
.test-header {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.test-info {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.timer {
    font-size: 1.5rem;
    font-weight: bold;
    color: #27ae60;
}

.timer.warning {
    color: #e74c3c;
}

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

.question-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.question-number {
    font-weight: bold;
    color: #3498db;
}

.question-points {
    color: #7f8c8d;
}

.question-text {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.warning-modal {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1000;
    padding: 1.5rem;
}

.warning-modal.show {
    display: flex;
}

.warning-modal .modal-content {
    background: #fff;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    text-align: center;
    max-width: 360px;
    width: 100%;
}

.warning-modal p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: #2c3e50;
}

.options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.option {
    display: flex;
    align-items: center;
    padding: 1rem;
    border: 2px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}

.option:hover {
    border-color: #3498db;
    background: #f8f9fa;
}

.option input[type="radio"] {
    margin-right: 1rem;
}

.answer-area textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
}

.test-actions {
    text-align: center;
    padding: 2rem 0;
}

/* Results Page */
.results-summary {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    text-align: center;
}

.results-summary.passed {
    border: 3px solid #27ae60;
}

.results-summary.failed {
    border: 3px solid #e74c3c;
}

.status-icon {
    width: 80px;
    height: 80px;
    line-height: 80px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    font-size: 3rem;
}

.status-icon.success {
    background: #27ae60;
    color: white;
}

.status-icon.failure {
    background: #e74c3c;
    color: white;
}

.score-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.score-item {
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 4px;
}

.score-item .label {
    display: block;
    color: #7f8c8d;
    margin-bottom: 0.5rem;
}

.score-item .value {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    color: #2c3e50;
}

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

.feedback {
    margin-top: 1rem;
    padding: 1rem;
    background: #f8f9fa;
    border-left: 4px solid #3498db;
    border-radius: 4px;
}

/* Admin Layout */
.admin-layout {
    display: flex;
    min-height: calc(100vh - 60px);
}

.admin-sidebar {
    width: 250px;
    background: #34495e;
    padding: 2rem 0;
}

.admin-nav {
    display: flex;
    flex-direction: column;
}

.admin-nav .nav-item {
    padding: 1rem 1.5rem;
    color: white;
    text-decoration: none;
    transition: background 0.3s;
}

.admin-nav .nav-item:hover {
    background: rgba(255,255,255,0.1);
}

.admin-content {
    flex: 1;
    padding: 2rem;
    background: #f5f5f5;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: #3498db;
}

.admin-section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.admin-form .form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.question-review-card {
    border: 2px solid #ddd;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.no-data {
    text-align: center;
    color: #7f8c8d;
    padding: 2rem;
}

code {
    background: #f4f4f4;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
}

/* Welcome Section */
.welcome-section {
    text-align: center;
    padding: 4rem 2rem;
}

.welcome-section h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.welcome-section .actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}