/* =========================================================
   assets/admin.css - Стили для панели управления
   
   Изменения (2026-07-22):
   - Добавлены Design Tokens (CSS-переменные для отступов, радиусов, переходов)
   - Стандартизированы отступы и border-radius через CSS-переменные
   - Улучшена стилизация таблиц (липкий хедер, улучшенные zebra-полосы)
   - Улучшены стили кнопок (hover-эффекты, единый размер)
   - Добавлены стили для color picker UI (тема оформления)
   - Добавлены плавные переходы для интерактивных элементов
   ========================================================= */

/* ===== Design Tokens ===== */
:root {
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;

  /* Transitions */
  --transition-base: 0.2s ease;
  --transition-fast: 0.15s ease;
  --transition-slow: 0.3s ease;
}

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

:root {
  --drumst-bg-page: var(--bg-main, #f5f7f9);
  --drumst-bg-card: var(--bg-card, #ffffff);
  --drumst-bg-subtle: var(--bg-table-stripe, #f8f9fa);
  --drumst-text-primary: var(--text-primary, #333333);
  --drumst-text-heading: var(--text-primary, #2c3e50);
  --drumst-text-muted: var(--text-secondary, #7f8c8d);
  --drumst-border: var(--border-color, #eaeaea);
  --drumst-header-bg: var(--sidebar-bg, #2c3e50);
  --drumst-header-text: var(--sidebar-text, #ffffff);
  --drumst-color-danger: var(--danger, #e74c3c);
  --drumst-color-success: var(--success, #5CB85C);
  --drumst-color-warning: var(--warning, #f39c12);
  --drumst-bg-success: var(--bg-success, #d4edda);
  --drumst-text-success: var(--text-success, #155724);
  --drumst-bg-danger: var(--bg-danger, #f8d7da);
  --drumst-text-danger: var(--text-danger, #721c24);
  --drumst-shadow-sm: var(--shadow-sm, 0 2px 8px rgba(0,0,0,0.1));
  --drumst-shadow-md: var(--shadow-md, 0 4px 20px rgba(0,0,0,0.05));
  --drumst-shadow-lg: var(--shadow-md, 0 10px 30px rgba(0,0,0,0.1));
}

[data-portal-style="dark"],
[data-portal-style="canvas-dark"] {
  --drumst-bg-page: var(--bg-main, #111a22);
  --drumst-bg-card: var(--bg-card, #1a2733);
  --drumst-bg-subtle: var(--bg-table-stripe, #233140);
  --drumst-text-primary: var(--text-primary, #d0d8e0);
  --drumst-text-heading: var(--text-primary, #e0e6ed);
  --drumst-text-muted: var(--text-secondary, #88929c);
  --drumst-border: var(--border-color, #34495e);
  --drumst-header-bg: var(--sidebar-bg, #1a2733);
  --drumst-header-text: var(--sidebar-text, #d0d8e0);
  --drumst-bg-success: var(--bg-success, #1a3a2e);
  --drumst-text-success: var(--text-success, #3dd68c);
  --drumst-bg-danger: var(--bg-danger, #3a1a1a);
  --drumst-text-danger: var(--text-danger, #f87171);
  --drumst-color-danger: var(--danger, #e74c3c);
  --drumst-color-success: var(--success, #5CB85C);
  --drumst-color-warning: var(--warning, #f39c12);
  --drumst-shadow-sm: var(--shadow-sm, 0 2px 8px rgba(0,0,0,0.3));
  --drumst-shadow-md: var(--shadow-md, 0 4px 20px rgba(0,0,0,0.3));
  --drumst-shadow-lg: var(--shadow-md, 0 10px 30px rgba(0,0,0,0.3));
}

body {
    font-family: 'Gilroy', sans-serif;
    background: var(--drumst-bg-page);
    color: var(--drumst-text-primary);
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Шапка админки */
.admin-header {
    background: var(--drumst-header-bg);
    color: var(--drumst-header-text);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: var(--drumst-shadow-sm);
    transition: background-color var(--transition-base);
}

.admin-header-wrapper {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-logo a {
    color: var(--drumst-header-text);
    text-decoration: none;
    font-size: 20px;
    font-weight: 600;
}

.admin-nav {
    display: flex;
    gap: var(--space-lg);
}

.admin-nav a {
    color: var(--drumst-nav-link, rgba(255,255,255,0.8));
    text-decoration: none;
    padding: var(--space-sm) var(--space-sm) + 4px;
    border-radius: var(--radius-sm) + 2px;
    transition: all var(--transition-slow);
}

.admin-nav a:hover {
    background: rgba(255,255,255,0.1);
    color: var(--drumst-header-text);
}

.admin-user {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.logout-btn {
    color: var(--drumst-color-danger);
    text-decoration: none;
    padding: 5px 10px;
    border: 1px solid var(--drumst-color-danger);
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: all var(--transition-base);
}

.logout-btn:hover {
    background: var(--drumst-color-danger);
    color: white;
}

/* Основной контент */
.admin-content {
    margin-top: 80px;
    padding: var(--space-xl);
    max-width: 1600px;
    margin-left: auto;
    margin-right: auto;
}

.admin-container {
    background: var(--drumst-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--drumst-shadow-md);
    transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

h1 {
    font-size: 28px;
    margin-bottom: var(--space-xl);
    color: var(--drumst-text-heading);
    transition: color var(--transition-base);
}

h2 {
    font-size: 22px;
    margin-bottom: var(--space-lg);
    color: var(--drumst-text-heading);
    transition: color var(--transition-base);
}

h3 {
    font-size: 18px;
    margin-bottom: var(--space-md);
    color: var(--drumst-text-muted);
    transition: color var(--transition-base);
}

/* Карточки */
.card {
    background: var(--drumst-bg-card);
    border: 1px solid var(--drumst-border);
    border-radius: var(--radius-lg);
    padding: 25px;
    margin-bottom: var(--space-xl);
    box-shadow: var(--drumst-shadow-sm, 0 2px 8px rgba(0,0,0,0.02));
    transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

/* Статистика */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px;
    border-radius: var(--radius-lg);
    text-align: center;
}

.stat-value {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 16px;
    opacity: 0.9;
}

/* Быстрые действия */
.actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.action-card {
    background: var(--drumst-bg-subtle);
    border: 1px solid var(--drumst-border);
    border-radius: var(--radius-lg);
    padding: 25px;
    text-decoration: none;
    color: var(--drumst-text-primary);
    transition: all var(--transition-slow);
    text-align: center;
}

.action-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--drumst-shadow-lg);
    border-color: var(--drumst-color-success);
}

.action-icon {
    font-size: 48px;
    margin-bottom: var(--space-md);
}

.action-title {
    font-size: 18px;
    font-weight: 600;
}

/* Таблицы */
.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.data-table thead {
    position: sticky;
    top: 0;
    z-index: 10;
}

.data-table th {
    text-align: left;
    padding: 12px var(--space-md);
    background: var(--drumst-bg-subtle);
    font-weight: 600;
    color: var(--drumst-text-heading);
    border-bottom: 2px solid var(--drumst-border);
    white-space: nowrap;
    transition: background-color var(--transition-base), color var(--transition-base);
}

.data-table td {
    padding: 12px var(--space-md);
    border-bottom: 1px solid var(--drumst-border);
    transition: background-color var(--transition-fast);
}

/* Чередование строк (zebra) */
.data-table tbody tr:nth-child(even) {
    background: var(--drumst-bg-subtle);
}

.data-table tbody tr:nth-child(odd) {
    background: var(--drumst-bg-card);
}

.data-table tbody tr:hover {
    background: var(--drumst-bg-success);
    transition: background-color var(--transition-fast);
}

/* Формы */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 500;
    color: var(--drumst-text-heading);
    transition: color var(--transition-base);
}

.form-control,
input:not([type="color"]):not([type="radio"]):not([type="checkbox"]),
textarea,
select {
    width: 100%;
    padding: 12px var(--space-md);
    border: 1px solid var(--drumst-border);
    border-radius: var(--radius-md);
    font-size: 16px;
    font-family: 'Gilroy', sans-serif;
    background: var(--drumst-bg-card);
    color: var(--drumst-text-primary);
    transition: border-color var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-base);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--drumst-color-success);
    box-shadow: var(--drumst-shadow-focus, 0 0 0 3px rgba(92,184,92,0.1));
}

.form-row {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.form-row .half {
    flex: 1;
}

.form-actions {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.form-inline {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

/* Кнопки */
.btn, .btn-small {
    display: inline-block;
    padding: 12px var(--space-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: all var(--transition-base);
    line-height: 1.4;
}

.btn-small {
    padding: 6px 12px;
    font-size: 14px;
    border-radius: var(--radius-sm);
}

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

.btn-primary:hover {
    filter: brightness(0.9);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(92,184,92,0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-danger:hover {
    filter: brightness(0.9);
    transform: translateY(-1px);
}

.btn-danger:active {
    transform: translateY(0);
}

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

.btn-warning:hover {
    filter: brightness(0.9);
    transform: translateY(-1px);
}

.btn-warning:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* Бейджи */
.badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm) + 8px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: var(--drumst-bg-success);
    color: var(--drumst-text-success);
}

.badge-secondary {
    background: var(--drumst-bg-subtle, #e2e3e5);
    color: var(--drumst-text-muted, #383d41);
}

/* Алерты */
.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    transition: opacity var(--transition-slow);
}

.alert-success {
    background: var(--drumst-bg-success);
    color: var(--drumst-text-success);
    border: 1px solid var(--drumst-border, #c3e6cb);
}

.alert-error {
    background: var(--drumst-bg-danger);
    color: var(--drumst-text-danger);
    border: 1px solid var(--drumst-border, #f5c6cb);
}

/* Модальные окна */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.modal-content {
    background: var(--drumst-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--drumst-shadow-lg);
    transition: background-color var(--transition-base);
}

.modal-actions {
    display: flex;
    gap: var(--space-md);
    margin-top: 25px;
}

/* Поля ввода ссылок */
.link-input {
    width: 200px;
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--drumst-border);
    border-radius: var(--radius-sm);
    font-size: 12px;
    background: var(--drumst-bg-subtle);
}

/* Утилиты */
.hint {
    color: var(--drumst-text-muted);
    font-size: 14px;
    margin-top: var(--space-xs);
    transition: color var(--transition-base);
}

.mt-20 {
    margin-top: var(--space-lg);
}

.mb-20 {
    margin-bottom: var(--space-lg);
}

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

/* ======= Color Picker UI (тема оформления) ======= */
.color-picker-wrap {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.color-picker-wrap input[type="color"] {
    width: 40px;
    height: 40px;
    padding: 2px;
    border: 2px solid var(--drumst-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    background: var(--drumst-bg-card);
    transition: border-color var(--transition-base);
}

.color-picker-wrap input[type="color"]:hover {
    border-color: var(--drumst-color-success);
}

.color-hex-input {
    width: 120px !important;
    padding: var(--space-sm) var(--space-sm) !important;
    border: 1px solid var(--drumst-border) !important;
    border-radius: var(--radius-sm) !important;
    font-size: 14px !important;
    font-family: 'Consolas', 'Courier New', monospace !important;
    text-align: center;
    transition: border-color var(--transition-base);
}

.color-hex-input:focus {
    border-color: var(--drumst-color-success) !important;
    box-shadow: var(--drumst-shadow-focus, 0 0 0 3px rgba(92,184,92,0.1)) !important;
}

/* Действия в таблице */
.data-table .actions {
    white-space: nowrap;
}

.data-table .actions a {
    margin-right: var(--space-xs);
}

/* ======= Стили для блока авторизации (login) ======= */
.login-wrapper {
    max-width: 400px;
    margin: 100px auto;
    padding: var(--space-xl);
}

.login-card {
    background: var(--drumst-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    box-shadow: var(--drumst-shadow-lg);
    transition: background-color var(--transition-base);
}

.login-card h1 {
    text-align: center;
    margin-bottom: var(--space-xl);
    font-size: 24px;
}

.login-card .form-group {
    margin-bottom: var(--space-lg);
}

.login-card .btn {
    width: 100%;
    padding: 14px;
    font-size: 18px;
}

/* ======= Навигация в курсах ======= */
.course-nav {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.course-nav a {
    text-decoration: none;
}

/* ======= Аккордеон разделов (синхронизация с course.css) ======= */
.menu-group-title {
    cursor: pointer;
    user-select: none;
}

.menu-group-title img {
    transition: transform var(--transition-slow);
}