/* ===== Global Styles ===== */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --light-bg: #ecf0f1;
    --dark-text: #2c3e50;
    --border-color: #bdc3c7;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: var(--dark-text);
}

/* ===== Navigation ===== */
.navbar {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.navbar-brand h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

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

.user-display {
    color: #ecf0f1;
}

.btn-logout {
    background-color: var(--danger-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
}

.btn-logout:hover {
    background-color: #c0392b;
}

/* ===== Container ===== */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* ===== Buttons ===== */
.btn-primary,
.btn-secondary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

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

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

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

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

.btn-nav {
    padding: 0.5rem 1rem;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-left: 0.5rem;
    font-size: 0.9rem;
    transition: background-color 0.3s ease;
}

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

/* ===== Forms ===== */
.form-group {
    margin-bottom: 1.5rem;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-inline {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: flex-end;
}

.form-inline input,
.form-inline select {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

.form-inline button {
    height: fit-content;
}

/* ===== Auth Box ===== */
.auth-box {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    max-width: 400px;
    margin: 3rem auto;
}

.auth-box h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.auth-box form button {
    width: 100%;
    margin-top: 1rem;
}

.toggle-link {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.toggle-link a {
    color: var(--secondary-color);
    text-decoration: none;
    cursor: pointer;
}

.toggle-link a:hover {
    text-decoration: underline;
}

/* ===== Pages ===== */
.page {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Home Page ===== */
.home-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.card {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
}

.card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

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

/* ===== Section ===== */
.section {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.section h3 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

/* ===== Tests Grid ===== */
.tests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.test-card {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.test-card h4 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.test-card p {
    font-size: 0.9rem;
    color: #7f8c8d;
    margin-bottom: 1rem;
}

.test-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--light-bg);
}

/* ===== Test Taking ===== */
.test-header {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.test-header h2 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.test-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.95rem;
    color: #7f8c8d;
}

.test-content {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    min-height: 400px;
}

.question {
    margin-bottom: 2rem;
}

.question-text {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--dark-text);
}

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

.option {
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    background-color: white;
}

.option:hover {
    border-color: var(--secondary-color);
    background-color: #f9f9f9;
}

.option input[type="radio"] {
    margin-right: 0.75rem;
}

.option.selected {
    border-color: var(--secondary-color);
    background-color: rgba(52, 152, 219, 0.05);
}

.explanation {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: #f9f9f9;
    border-left: 4px solid var(--secondary-color);
    border-radius: 4px;
}

.explanation.correct {
    border-left-color: var(--success-color);
    background-color: rgba(39, 174, 96, 0.05);
}

.explanation.incorrect {
    border-left-color: var(--danger-color);
    background-color: rgba(231, 76, 60, 0.05);
}

/* ===== Test Navigation ===== */
.test-navigation {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 2rem;
}

.test-navigation button {
    flex: 1;
}

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

.result-card {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.result-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.result-card h4 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.result-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin: 1rem 0;
    font-size: 0.9rem;
}

.result-stat {
    padding: 0.5rem;
    background-color: var(--light-bg);
    border-radius: 4px;
}

.result-stat strong {
    display: block;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.result-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: 0.5rem;
}

.result-badge.passed {
    background-color: rgba(39, 174, 96, 0.2);
    color: var(--success-color);
}

.result-badge.failed {
    background-color: rgba(231, 76, 60, 0.2);
    color: var(--danger-color);
}

.result-summary {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.result-summary h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.result-summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.summary-item {
    text-align: center;
}

.summary-item .value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.summary-item .label {
    font-size: 0.9rem;
    color: #7f8c8d;
    margin-top: 0.5rem;
}

#resultAnswers {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.answer-review {
    padding: 1.5rem;
    border-radius: 8px;
    background-color: white;
    border-left: 4px solid #3498db;
}

.answer-review.correct {
    border-left-color: var(--success-color);
    background-color: rgba(39, 174, 96, 0.02);
}

.answer-review.incorrect {
    border-left-color: var(--danger-color);
    background-color: rgba(231, 76, 60, 0.02);
}

.answer-review-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.answer-review-text {
    font-size: 0.95rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

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

.stat-card {
    background: linear-gradient(135deg, var(--secondary-color), #2980b9);
    color: white;
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.stat-card h3 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.stat-card p {
    font-size: 0.9rem;
    opacity: 0.9;
}

.candidates-table {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.candidates-table table {
    width: 100%;
}

.candidates-table th {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

.candidates-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--light-bg);
}

.candidates-table tr:hover {
    background-color: #f9f9f9;
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    max-width: 500px;
    position: relative;
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: #7f8c8d;
}

.close:hover {
    color: var(--danger-color);
}

#messageText {
    margin: 1rem 0;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
    }

    .home-grid,
    .tests-grid,
    .results-grid,
    .admin-stats {
        grid-template-columns: 1fr;
    }

    .test-info {
        flex-direction: column;
        gap: 0.5rem;
    }

    .test-navigation {
        flex-direction: column;
    }

    .result-stats {
        grid-template-columns: 1fr;
    }

    .form-inline {
        flex-direction: column;
    }

    .form-inline input,
    .form-inline select,
    .form-inline button {
        width: 100%;
    }

    .auth-box {
        margin: 1rem auto;
        padding: 1.5rem;
    }
}

/* ===== AI Guidance Styles ===== */
.ai-guidance {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 8px;
    padding: 20px;
    color: white;
    margin: 20px 0;
}

#guidanceContent {
    background-color: rgba(255, 255, 255, 0.95);
    color: var(--dark-text);
    border-radius: 8px;
    padding: 20px;
    line-height: 1.8;
    margin-top: 20px;
}

#guidanceContent h4 {
    color: var(--secondary-color);
    margin-top: 15px;
    margin-bottom: 8px;
    font-weight: 600;
}

#guidanceContent ul {
    margin-left: 20px;
    margin-bottom: 10px;
}

#guidanceContent li {
    margin-bottom: 8px;
}

#guidanceContent p {
    margin-bottom: 10px;
}

.guidance-loading {
    text-align: center;
    padding: 20px;
}

.guidance-error {
    background-color: #ffe6e6;
    color: #c41e3a;
    padding: 15px;
    border-radius: 5px;
    margin-top: 10px;
}

.guidance-success {
    background-color: #e6ffe6;
    color: #27ae60;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 10px;
}


/* ===== Site Corner Ribbon ===== */
.corner-ribbon {
    position: fixed;
    top: 14px;
    right: -50px;
    width: 220px;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    text-transform: uppercase;
    font-size: 12px;
    font-weight: 600;
    line-height: 28px;
    letter-spacing: 0.5px;
    transform: rotate(45deg);
    box-shadow: 0 2px 8px rgba(0,0,0,0.25);
    z-index: 999; /* Below modal (1000), above content */
    pointer-events: none; /* Don't block clicks */
}

@media (max-width: 768px) {
    .corner-ribbon {
        top: 10px;
        right: -60px;
        width: 200px;
        font-size: 11px;
        line-height: 24px;
    }
}

@media (max-width: 420px) {
    .corner-ribbon {
        top: 8px;
        right: -70px;
        width: 190px;
        font-size: 10px;
        line-height: 22px;
    }
}