/* NTA CBT Platform - Main Stylesheet */

/* NTA Colour Tokens */
:root {
    --nta-primary: #003366;
    --nta-orange: #F47920;
    --nta-green: #3A9E3A;
    --nta-purple: #7B4F9E;
    --nta-teal: #3A7B9E;
    --nta-grey: #888888;
    --nta-red: #CC0000;
    --nta-bg: #E8F4F8;
    --nta-card-bg: #FFFFFF;
    --nta-section-bg: #F0F4F8;
    --nta-candidate-bar: #C8DAEA;
    --nta-border: #CCCCCC;
    --nta-text-primary: #111111;
    --nta-text-secondary: #555555;
}

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

body {
    font-family: Arial, sans-serif;
    font-size: 13px;
    color: var(--nta-text-primary);
    background-color: var(--nta-bg);
    min-height: 100vh;
}

/* Login Page */
.login-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    color: var(--nta-primary);
    font-size: 20px;
    font-weight: bold;
}

.login-card {
    background: var(--nta-card-bg);
    border: 1px solid var(--nta-border);
    border-radius: 4px;
    padding: 30px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.login-card h2 {
    color: var(--nta-primary);
    font-size: 15px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 25px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    color: var(--nta-text-primary);
    font-size: 13px;
    font-weight: bold;
    margin-bottom: 8px;
}

.form-group input[type="text"],
.form-group input[type="password"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--nta-border);
    border-radius: 2px;
    font-size: 13px;
    font-family: Arial, sans-serif;
}

.form-group input:focus {
    outline: none;
    border-color: var(--nta-primary);
    box-shadow: 0 0 0 2px rgba(0, 51, 102, 0.1);
}

.btn-login {
    width: 100%;
    padding: 10px 20px;
    background-color: var(--nta-orange);
    color: white;
    border: none;
    border-radius: 2px;
    font-size: 13px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-login:hover {
    background-color: #e06a10;
}

.btn-login:active {
    transform: translateY(1px);
}

/* Error Messages */
.error-message {
    background-color: #fee;
    border: 1px solid #fcc;
    border-radius: 3px;
    color: #c33;
    padding: 10px 12px;
    font-size: 12px;
    margin-bottom: 15px;
    text-align: center;
}

.error-message-inline {
    color: var(--nta-red);
    font-size: 12px;
    margin-top: 5px;
}

/* Home Page */
.home-page {
    min-height: 100vh;
    padding: 20px;
}

.home-header {
    background: var(--nta-card-bg);
    border: 1px solid var(--nta-border);
    border-radius: 4px;
    padding: 20px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.home-header h1 {
    color: var(--nta-primary);
    font-size: 18px;
}

.home-content {
    background: var(--nta-card-bg);
    border: 1px solid var(--nta-border);
    border-radius: 4px;
    padding: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.welcome-section {
    text-align: center;
    padding: 40px 20px;
}

.welcome-section h2 {
    color: var(--nta-primary);
    font-size: 20px;
    margin-bottom: 10px;
}

.welcome-section p {
    color: var(--nta-text-secondary);
    font-size: 14px;
}

.user-info-card {
    background: var(--nta-section-bg);
    border: 1px solid var(--nta-border);
    border-radius: 3px;
    padding: 20px;
    margin-top: 20px;
}

.user-info-card table {
    width: 100%;
    border-collapse: collapse;
}

.user-info-card td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--nta-border);
    font-size: 13px;
}

.user-info-card td:first-child {
    font-weight: bold;
    color: var(--nta-text-secondary);
    width: 150px;
}

.user-info-card tr:last-child td {
    border-bottom: none;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border: none;
    border-radius: 2px;
    font-size: 12px;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.2s;
}

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

.btn-primary:hover {
    background-color: #004488;
}

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

.btn-secondary:hover {
    background-color: #666;
}

.btn-logout {
    background-color: var(--nta-text-secondary);
    color: white;
    padding: 8px 16px;
    border: none;
    border-radius: 2px;
    font-size: 12px;
    cursor: pointer;
    text-decoration: none;
}

.btn-logout:hover {
    background-color: #666;
}

/* Role Badges */
.role-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: bold;
    text-transform: uppercase;
}

.role-coach {
    background-color: var(--nta-primary);
    color: white;
}

.role-student {
    background-color: var(--nta-green);
    color: white;
}

/* Coach Navigation */
.coach-nav {
    background-color: var(--nta-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    height: 50px;
}

.coach-nav-left,
.coach-nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.coach-logo {
    color: white;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
}

.coach-nav-center {
    display: flex;
    gap: 5px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 2px;
    font-size: 13px;
    transition: all 0.2s;
}

.nav-link:hover {
    color: white;
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
    color: white;
    background-color: rgba(255, 255, 255, 0.2);
}

.nav-link.disabled {
    color: rgba(255, 255, 255, 0.3);
    cursor: not-allowed;
}

.coach-name {
    color: white;
    font-size: 13px;
}

.logout-form {
    display: inline;
}

.coach-nav .btn-logout,
.student-nav .btn-logout {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 6px 12px;
    border-radius: 2px;
    font-size: 12px;
    cursor: pointer;
}

.coach-nav .btn-logout:hover,
.student-nav .btn-logout:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

/* Student Navigation */
.student-nav {
    background-color: var(--nta-primary);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    height: 50px;
}

.student-nav-left {
    display: flex;
    align-items: center;
}

.student-nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.student-logo {
    color: white;
    text-decoration: none;
    font-size: 18px;
    font-weight: bold;
}

.student-name {
    font-size: 13px;
}

/* Coach Content Container */
.coach-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Dashboard/Upload Header */
.dashboard-header,
.upload-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.dashboard-header h1,
.upload-header h1 {
    color: var(--nta-primary);
    font-size: 20px;
}

.upload-header p {
    color: var(--nta-text-secondary);
    font-size: 14px;
}

/* Toolbar */
.dashboard-toolbar,
.toolbar {
    background: var(--nta-card-bg);
    border: 1px solid var(--nta-border);
    border-radius: 4px;
    padding: 15px 20px;
    margin-bottom: 20px;
    display: flex;
    gap: 15px;
    align-items: center;
}

.search-input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid var(--nta-border);
    border-radius: 2px;
    font-size: 13px;
}

.filter-select {
    padding: 10px 15px;
    border: 1px solid var(--nta-border);
    border-radius: 2px;
    font-size: 13px;
    background: white;
}

.btn-upload,
.btn-add-student {
    background-color: var(--nta-orange);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 2px;
    font-size: 13px;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

.btn-upload:hover,
.btn-add-student:hover {
    background-color: #e06a10;
}

/* Table Styles */
.test-table-container,
.student-table-container {
    background: var(--nta-card-bg);
    border: 1px solid var(--nta-border);
    border-radius: 4px;
    overflow: hidden;
}

.test-table,
.student-table {
    width: 100%;
    border-collapse: collapse;
}

.test-table thead,
.student-table thead {
    background-color: var(--nta-section-bg);
}

.test-table th,
.student-table th {
    padding: 12px 15px;
    text-align: left;
    font-size: 12px;
    font-weight: bold;
    color: var(--nta-text-secondary);
    border-bottom: 1px solid var(--nta-border);
}

.test-table td,
.student-table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--nta-border);
    font-size: 13px;
}

.test-table tbody tr:hover,
.student-table tbody tr:hover {
    background-color: var(--nta-bg);
}

.test-table tbody tr:last-child td,
.student-table tbody tr:last-child td {
    border-bottom: none;
}

/* Badges */
.subject-badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: bold;
    color: white;
    margin-right: 4px;
}

.subject-physics { background-color: var(--nta-green); }
.subject-chemistry { background-color: var(--nta-orange); }
.subject-mathematics { background-color: var(--nta-primary); }
.subject-biology { background-color: var(--nta-purple); }
.subject-general { background-color: var(--nta-grey); }

.status-badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: bold;
}

.status-active {
    background-color: var(--nta-green);
    color: white;
}

.status-draft {
    background-color: var(--nta-orange);
    color: white;
}

.status-archived {
    background-color: var(--nta-grey);
    color: white;
}

.status-active { color: var(--nta-green); }
.status-inactive { color: var(--nta-grey); }
.status-locked { color: var(--nta-orange); }

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 8px;
}

.action-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    padding: 4px;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.action-btn:hover {
    opacity: 1;
}

/* Pagination */
.pagination-container {
    background: var(--nta-card-bg);
    border: 1px solid var(--nta-border);
    border-radius: 4px;
    padding: 15px 20px;
    margin-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pagination-info {
    font-size: 13px;
    color: var(--nta-text-secondary);
}

.pagination-controls {
    display: flex;
    gap: 5px;
}

.pagination-btn {
    padding: 8px 12px;
    border: 1px solid var(--nta-border);
    background: white;
    border-radius: 2px;
    font-size: 13px;
    cursor: pointer;
    text-decoration: none;
    color: var(--nta-text-primary);
}

.pagination-btn:hover {
    background-color: var(--nta-section-bg);
}

.pagination-btn.active {
    background-color: var(--nta-primary);
    color: white;
    border-color: var(--nta-primary);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Empty State */
.empty-state {
    background: var(--nta-card-bg);
    border: 1px solid var(--nta-border);
    border-radius: 4px;
    padding: 60px 20px;
    text-align: center;
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.empty-state h2 {
    color: var(--nta-text-secondary);
    font-size: 18px;
    margin-bottom: 10px;
}

.empty-state p {
    color: var(--nta-text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

/* Loading State */
.loading-state {
    text-align: center;
    padding: 40px;
    color: var(--nta-text-secondary);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    z-index: 1000;
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 4px;
    width: 100%;
    max-width: 500px;
}

.modal-header {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 20px;
    color: var(--nta-primary);
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.btn-primary {
    background-color: var(--nta-orange);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 2px;
    cursor: pointer;
}

.btn-secondary {
    background-color: var(--nta-grey);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 2px;
    cursor: pointer;
}

/* Create Test Modal */
.btn-create-test {
    background-color: var(--nta-primary);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 2px;
    font-size: 13px;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

.btn-create-test:hover {
    opacity: 0.9;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-overlay .modal-content {
    background: white;
    padding: 30px;
    border-radius: 4px;
    width: 100%;
    max-width: 500px;
}

.modal-overlay .modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-overlay .modal-header h3 {
    margin: 0;
    color: var(--nta-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #666;
    padding: 0 4px;
}

.modal-close:hover {
    color: #333;
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.modal-field label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 4px;
    color: #333;
}

.modal-field input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 2px;
    font-size: 14px;
    box-sizing: border-box;
}

.modal-field .required {
    color: #e74c3c;
}

.modal-footer {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 20px;
}

.modal-footer .btn-cancel {
    background-color: var(--nta-grey);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 2px;
    cursor: pointer;
}

.modal-footer .btn-save {
    background-color: var(--nta-orange);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 2px;
    cursor: pointer;
    font-weight: bold;
}

.modal-error {
    background-color: #fee;
    color: #c00;
    padding: 8px 12px;
    border-radius: 2px;
    font-size: 13px;
    border: 1px solid #fcc;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }

/* KaTeX math rendering alignment */
.katex { font-size: 1em; }
.katex-display { margin: 0.5em 0; overflow-x: auto; }