/**
 * Kursverwaltung Feuerwehr - Stylesheet
 * Moderne, professionelle Gestaltung mit Dark Mode
 */

/* === CSS-Variablen === */
:root {
    --color-primary: #D32F2F;
    --color-primary-dark: #B71C1C;
    --color-primary-light: #FFCDD2;
    --color-success: #2E7D32;
    --color-success-light: #C8E6C9;
    --color-danger: #C62828;
    --color-danger-light: #FFCDD2;
    --color-warning: #F57C00;
    --color-warning-light: #FFE0B2;
    --color-info: #0277BD;
    --color-info-light: #B3E5FC;

    --color-gray-50: #FAFAFA;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #EEEEEE;
    --color-gray-300: #E0E0E0;
    --color-gray-400: #BDBDBD;
    --color-gray-500: #9E9E9E;
    --color-gray-600: #757575;
    --color-gray-700: #616161;
    --color-gray-800: #424242;
    --color-gray-900: #212121;

    --color-text: #1A1A1A;
    --color-text-secondary: #666666;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F8F9FA;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15), 0 10px 10px rgba(0, 0, 0, 0.04);

    --border-radius-sm: 6px;
    --border-radius-md: 10px;
    --border-radius-lg: 14px;
    --border-radius-xl: 18px;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Dark Mode === */
[data-theme="dark"] {
    --color-text: #E8E8E8;
    --color-text-secondary: #B0B0B0;
    --color-bg: #1A1A1A;
    --color-bg-alt: #242424;

    --color-gray-50: #2A2A2A;
    --color-gray-100: #303030;
    --color-gray-200: #383838;
    --color-gray-300: #424242;
    --color-gray-400: #5A5A5A;
    --color-gray-500: #757575;
    --color-gray-600: #9E9E9E;
    --color-gray-700: #BDBDBD;
    --color-gray-800: #E0E0E0;
    --color-gray-900: #F5F5F5;

    --color-primary-light: #6B1F1F;
    --color-success-light: #1B4D1F;
    --color-danger-light: #5A1919;
    --color-warning-light: #5C3D00;
    --color-info-light: #0A3854;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5), 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6), 0 10px 10px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .login-page {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

/* Dark Mode Spezifische Anpassungen */
[data-theme="dark"] .navbar {
    background: #242424;
    border-bottom-color: #383838;
}

[data-theme="dark"] .login-card,
[data-theme="dark"] .course-card,
[data-theme="dark"] .course-detail-header,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .table-wrapper,
[data-theme="dark"] .modal-content {
    background: #242424;
}

[data-theme="dark"] .course-detail-header,
[data-theme="dark"] .stat-card {
    background: #2A2A2A;
}

[data-theme="dark"] .participants-table thead {
    background: #303030;
}

[data-theme="dark"] .participants-table tbody tr {
    border-bottom-color: #383838;
}

[data-theme="dark"] .participants-table tbody tr:hover {
    background: #2A2A2A;
}

[data-theme="dark"] .course-card {
    background: #2A2A2A;
}

[data-theme="dark"] .stat {
    background: #303030;
}

[data-theme="dark"] .form-group input,
[data-theme="dark"] .search-input-group input {
    background: #303030;
    color: #E8E8E8;
    border-color: #424242;
}

[data-theme="dark"] .form-group input:focus,
[data-theme="dark"] .search-input-group input:focus {
    background: #383838;
    border-color: var(--color-primary);
}

[data-theme="dark"] .login-info {
    background: #303030;
}

[data-theme="dark"] .message.success {
    background: #1B4D1F;
    color: #C8E6C9;
    border-color: #2E7D32;
}

[data-theme="dark"] .message.error {
    background: #5A1919;
    color: #FFCDD2;
    border-color: #C62828;
}

[data-theme="dark"] .empty-state svg {
    color: #5A5A5A;
}

[data-theme="dark"] .course-status-badge {
    opacity: 0.9;
}

[data-theme="dark"] .status-upcoming .course-status-badge {
    background: #0A3854;
    color: #B3E5FC;
}

[data-theme="dark"] .status-active .course-status-badge {
    background: #1B4D1F;
    color: #C8E6C9;
}

[data-theme="dark"] .status-completed .course-status-badge {
    background: #383838;
    color: #BDBDBD;
}

[data-theme="dark"] .stat-icon {
    opacity: 0.9;
}

[data-theme="dark"] .stat-confirmed .stat-icon {
    background: #1B4D1F;
}

[data-theme="dark"] .stat-declined .stat-icon {
    background: #5A1919;
}

[data-theme="dark"] .stat-pending .stat-icon {
    background: #5C3D00;
}

[data-theme="dark"] .stat-vegetarian .stat-icon {
    background: #1B4D1F;
}

[data-theme="dark"] .status-badge.status-confirmed {
    background: #1B4D1F;
    color: #C8E6C9;
}

[data-theme="dark"] .status-badge.status-declined {
    background: #5A1919;
    color: #FFCDD2;
}

[data-theme="dark"] .status-badge.status-pending {
    background: #383838;
    color: #BDBDBD;
}

[data-theme="dark"] .verpflegung-badge {
    background: #383838;
    color: #BDBDBD;
}

[data-theme="dark"] .verpflegung-badge.verpflegung-vegetarian {
    background: #1B4D1F;
    color: #C8E6C9;
}

[data-theme="dark"] .btn-comment {
    background: #0A3854;
    color: #B3E5FC;
}

[data-theme="dark"] .btn-comment:hover {
    background: var(--color-info);
}

[data-theme="dark"] .modal {
    background: rgba(0, 0, 0, 0.8);
}

[data-theme="dark"] .modal-header {
    border-bottom-color: #383838;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--color-bg-alt);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === Login-Seite === */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 460px;
}

.login-card {
    background: var(--color-bg);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
    padding: 40px;
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-section {
    text-align: center;
    margin-bottom: 32px;
}

.fire-emblem {
    font-size: 64px;
    margin-bottom: 16px;
    display: inline-block;
    animation: flicker 2s infinite;
}

@keyframes flicker {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.logo-section h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.subtitle {
    color: var(--color-text-secondary);
    font-size: 16px;
}

/* === Messages === */
.message {
    padding: 14px 18px;
    border-radius: var(--border-radius-md);
    margin-bottom: 24px;
    font-size: 14px;
    font-weight: 500;
    animation: slideDown 0.3s ease;
}

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

.message.success {
    background: var(--color-success-light);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.message.error {
    background: var(--color-danger-light);
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
}

/* === Forms === */
.login-form, .search-form {
    margin-bottom: 24px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--border-radius-md);
    font-size: 15px;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(211, 47, 47, 0.1);
}

.form-group small {
    display: block;
    margin-top: 6px;
    font-size: 13px;
    color: var(--color-text-secondary);
}

.code-input {
    font-size: 24px !important;
    text-align: center;
    letter-spacing: 4px;
    font-weight: 600;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius-md);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    font-family: inherit;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--color-gray-600);
    color: white;
}

.btn-secondary:hover {
    background: var(--color-gray-700);
}

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

.btn-success:hover {
    background: #1B5E20;
}

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

.btn-info:hover {
    background: #01579B;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn-block {
    width: 100%;
}

/* === Info Box === */
.login-info {
    background: var(--color-gray-50);
    border-radius: var(--border-radius-md);
    padding: 20px;
    margin-bottom: 20px;
}

.login-info h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--color-text);
}

.login-info ol {
    padding-left: 20px;
}

.login-info li {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
}

/* === Links === */
.verify-link, .back-link {
    text-align: center;
}

.verify-link a, .back-link a {
    color: var(--color-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

.verify-link a:hover, .back-link a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* === Navigation === */
.navbar {
    background: white;
    border-bottom: 1px solid var(--color-gray-200);
    padding: 16px 0;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.nav-brand .fire-emblem {
    font-size: 32px;
}

.brand-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
}

.nav-brand .back-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: var(--transition);
}

.nav-brand .back-link:hover {
    color: var(--color-primary-dark);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.admin-badge {
    background: var(--color-primary);
    color: white;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* === Dark Mode Toggle === */
.theme-toggle {
    background: var(--color-gray-200);
    border: none;
    border-radius: 20px;
    padding: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
    width: 60px;
    height: 32px;
    position: relative;
}

.theme-toggle:hover {
    background: var(--color-gray-300);
}

.theme-toggle-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-gray-600);
    position: absolute;
    left: 6px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

[data-theme="dark"] .theme-toggle-icon {
    left: 34px;
    background: var(--color-primary);
}

/* === Container === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 32px 24px;
}

/* === Page Header === */
.page-header {
    margin-bottom: 32px;
}

.page-header .header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.page-header h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}

.page-header .subtitle {
    font-size: 16px;
    color: var(--color-text-secondary);
}

/* === Course Grid === */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}

.course-card {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border-left: 4px solid var(--color-gray-300);
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.course-card.status-upcoming {
    border-left-color: var(--color-info);
}

.course-card.status-active {
    border-left-color: var(--color-success);
}

.course-card.status-completed {
    border-left-color: var(--color-gray-500);
}

.course-header {
    margin-bottom: 16px;
}

.course-status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.status-upcoming .course-status-badge {
    background: var(--color-info-light);
    color: var(--color-info);
}

.status-active .course-status-badge {
    background: var(--color-success-light);
    color: var(--color-success);
}

.status-completed .course-status-badge {
    background: var(--color-gray-200);
    color: var(--color-gray-600);
}

.course-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.3;
}

.course-dates {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

.course-dates svg {
    flex-shrink: 0;
}

/* === Stats === */
.course-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.stat {
    text-align: center;
    padding: 12px 8px;
    background: var(--color-gray-50);
    border-radius: var(--border-radius-md);
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 11px;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.stat-success .stat-value {
    color: var(--color-success);
}

.stat-danger .stat-value {
    color: var(--color-danger);
}

/* === Empty State === */
.empty-state {
    text-align: center;
    padding: 80px 20px;
}

.empty-state svg {
    color: var(--color-gray-400);
    margin-bottom: 24px;
}

.empty-state h2 {
    font-size: 24px;
    color: var(--color-text);
    margin-bottom: 12px;
}

.empty-state p {
    color: var(--color-text-secondary);
    font-size: 16px;
}

/* === Course Details === */
.course-detail-header {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 32px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-md);
}

.course-detail-header h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text);
}

.course-meta {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-secondary);
    font-size: 15px;
}

.meta-item svg {
    color: var(--color-primary);
}

/* === Stats Overview === */
.stats-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    flex-shrink: 0;
}

.stat-confirmed .stat-icon {
    background: var(--color-success-light);
}

.stat-declined .stat-icon {
    background: var(--color-danger-light);
}

.stat-pending .stat-icon {
    background: var(--color-warning-light);
}

.stat-vegetarian .stat-icon {
    background: #E8F5E9;
}

.stat-content {
    flex: 1;
}

.stat-content .stat-value {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 4px;
}

.stat-confirmed .stat-value {
    color: var(--color-success);
}

.stat-declined .stat-value {
    color: var(--color-danger);
}

.stat-pending .stat-value {
    color: var(--color-warning);
}

.stat-vegetarian .stat-value {
    color: #2E7D32;
}

/* === Table Controls === */
.table-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.export-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.search-input-group {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-input-group svg {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-500);
}

.search-input-group input {
    width: 100%;
    padding: 12px 16px 12px 48px;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--border-radius-md);
    font-size: 15px;
    transition: var(--transition);
}

.search-input-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(211, 47, 47, 0.1);
}

.clear-search {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-500);
    text-decoration: none;
    font-size: 18px;
    font-weight: bold;
    transition: var(--transition);
}

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

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

.participants-table {
    width: 100%;
    border-collapse: collapse;
}

.participants-table thead {
    background: var(--color-gray-50);
}

.participants-table th {
    padding: 16px 20px;
    text-align: left;
    font-size: 13px;
    font-weight: 700;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--color-gray-200);
}

.participants-table tbody tr {
    border-bottom: 1px solid var(--color-gray-200);
    transition: var(--transition);
}

.participants-table tbody tr:hover {
    background: var(--color-gray-50);
}

.participants-table td {
    padding: 16px 20px;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.participant-name {
    font-weight: 600;
    color: var(--color-text) !important;
}

.empty-row {
    text-align: center;
    padding: 60px 20px !important;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* === Status Badges === */
.status-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-badge.status-confirmed {
    background: var(--color-success-light);
    color: var(--color-success);
}

.status-badge.status-declined {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

.status-badge.status-pending {
    background: var(--color-gray-200);
    color: var(--color-gray-600);
}

/* === Verpflegung Badge === */
.verpflegung-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

.verpflegung-badge.verpflegung-vegetarian {
    background: #E8F5E9;
    color: #2E7D32;
}

/* === Comment Button === */
.btn-comment {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--color-info-light);
    color: var(--color-info);
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-comment:hover {
    background: var(--color-info);
    color: white;
}

/* === Modal === */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: white;
    border-radius: var(--border-radius-xl);
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    animation: modalSlideUp 0.3s ease;
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 28px;
    border-bottom: 1px solid var(--color-gray-200);
}

.modal-header h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
}

.modal-close {
    background: none;
    border: none;
    font-size: 32px;
    color: var(--color-gray-500);
    cursor: pointer;
    transition: var(--transition);
    line-height: 1;
}

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

.modal-body {
    padding: 28px;
    max-height: 60vh;
    overflow-y: auto;
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    white-space: pre-wrap;
}

/* === Utility Classes === */
.text-muted {
    color: var(--color-gray-400);
}

/* === Responsive === */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 16px;
    }

    .page-header .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .page-header .header-content .btn {
        width: 100%;
    }

    .courses-grid {
        grid-template-columns: 1fr;
    }

    .course-stats {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .table-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .search-input-group {
        max-width: none;
    }

    .table-wrapper {
        overflow-x: auto;
    }

    .participants-table {
        min-width: 700px;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: 28px;
    }

    .page-header h1 {
        font-size: 28px;
    }

    .course-card {
        padding: 20px;
    }
}

/* === Name Mapping === */
.modal-large {
    max-width: 700px;
}

.info-box-privacy {
    background: #E3F2FD;
    border-left: 4px solid #2196F3;
    padding: 12px;
    margin-bottom: 15px;
    display: flex;
    gap: 10px;
    align-items: flex-start;
    border-radius: var(--border-radius-sm);
    font-size: 13px;
}

[data-theme="dark"] .info-box-privacy {
    background: #0A3854;
    border-left-color: #2196F3;
}

.info-box-privacy svg {
    flex-shrink: 0;
    color: #2196F3;
}

.info-box-privacy strong {
    color: #1976D2;
}

[data-theme="dark"] .info-box-privacy strong {
    color: #64B5F6;
}

.mapping-status {
    margin-bottom: 15px;
}

.mapping-active,
.mapping-inactive {
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 12px;
    border-radius: var(--border-radius-md);
}

.mapping-active {
    background: #E8F5E9;
    color: #2E7D32;
}

[data-theme="dark"] .mapping-active {
    background: #1B4D1F;
    color: #C8E6C9;
}

.mapping-inactive {
    background: #FFEBEE;
    color: #C62828;
}

[data-theme="dark"] .mapping-inactive {
    background: #5A1919;
    color: #FFCDD2;
}

.mapping-active svg,
.mapping-inactive svg {
    flex-shrink: 0;
}

.upload-section {
    margin-bottom: 15px;
}

.upload-section h4 {
    margin-bottom: 6px;
    color: var(--color-text);
    font-size: 14px;
}

.help-text {
    color: var(--color-text-secondary);
    font-size: 13px;
    margin-bottom: 12px;
}

.file-upload-area {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.format-info {
    background: var(--color-gray-100);
    padding: 10px;
    border-radius: var(--border-radius-sm);
    font-size: 12px;
    color: var(--color-text-secondary);
}

.format-info code {
    display: block;
    margin-top: 3px;
    color: var(--color-text);
    font-family: 'Courier New', monospace;
    font-size: 11px;
}

.mapping-preview {
    margin-bottom: 15px;
}

.mapping-preview h4 {
    margin-bottom: 10px;
    color: var(--color-text);
    font-size: 14px;
}

.preview-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    background: var(--color-gray-50);
    border-radius: var(--border-radius-sm);
    margin-bottom: 6px;
}

.preview-id {
    font-family: 'Courier New', monospace;
    color: var(--color-text-secondary);
    font-size: 12px;
}

.preview-arrow {
    color: var(--color-primary);
    font-weight: bold;
    font-size: 14px;
}

.preview-name {
    font-weight: 600;
    color: var(--color-text);
    font-size: 13px;
}

.preview-more {
    color: var(--color-text-secondary);
    font-size: 12px;
    font-style: italic;
    padding: 6px 10px;
}

.mapping-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 15px;
}

.badge {
    background: var(--color-primary);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: bold;
    margin-left: 6px;
}

.badge-small {
    background: rgba(255, 255, 255, 0.3);
    padding: 1px 6px;
    border-radius: 8px;
    font-size: 10px;
    font-weight: bold;
    margin-left: 4px;
}

.tech-id {
    font-size: 12px;
    color: var(--color-text-secondary);
    font-family: 'Courier New', monospace;
    margin-top: 2px;
}

.header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

/* === Modal Responsive === */
@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        max-height: 95vh;
    }

    .modal-large {
        max-width: 95%;
    }

    .file-upload-area {
        flex-direction: column;
    }

    .file-upload-area button {
        width: 100%;
    }

    .header-actions {
        width: 100%;
        margin-top: 15px;
    }
}