/* =========================================================
   assets/course.css - Единый файл стилей для всех режимов курса
   
   Изменения (2026-07-22):
   - Добавлены Design Tokens (CSS-переменные для отступов, радиусов, переходов)
   - Стандартизированы отступы и border-radius через CSS-переменные
   - Улучшен блок прогресса (скруглённый, анимированное заполнение)
   - Добавлены плавные переходы для основных элементов
   - Улучшена тёмная тема (полный набор переменных)
   - Добавлены стили для новых блоков (button, divider)
   ========================================================= */

/* ===== 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;
}

@import url('https://fonts.googleapis.com/css2?family=Gilroy:wght@400;500;600;700&display=swap');

:root {
  --page-max: 1600px;
  --gutter: 24px;
  --sidebar-w: 350px;
  --header-h: 70px;
  --footer-h: 72px;
  --sidebar-left: 20px;
  --primary-green: var(--success, #5cb85c);
  --light-green: var(--bg-success, #e0f7e0);
  --error-red: var(--danger, #e74c3c);
  --gray-bg: var(--bg-main, #f5f7f9);
  --border-radius: var(--radius-lg, 12px);
  --shadow: var(--shadow-sm, 0 2px 8px rgba(0,0,0,0.05));
}

/* ======= БАЗОВЫЕ СТИЛИ ======= */
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
  font-family: 'Gilroy', sans-serif;
  background: var(--gray-bg);
  color: var(--drumst-text-primary, #333);
  transition: background-color var(--transition-base), color var(--transition-base);
}

body {
  line-height: 1.5;
}

body::after {
  content: "";
  position: fixed;
  left: 0; right: 0; bottom: 0; height: 20px;
  background: var(--gray-bg);
  z-index: 5;
  pointer-events: none;
  transition: background-color var(--transition-base);
}

/* ======= ШАПКА КУРСА ======= */
.header-full {
  width: 100%;
  position: fixed;
  top: 0; left: 0;
  z-index: 1000;
  background: var(--drumst-bg-card, #fff) !important;
  box-shadow: var(--drumst-shadow-sm, 0 2px 8px rgba(0,0,0,0.07));
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

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

.header-left, .header-right {
  display: flex;
  flex-direction: column;
}

.header-title { 
  font-size: 20px; 
  font-weight: 700; 
  margin: 0; 
  color: var(--drumst-text-primary, #222); 
}

.header-subtitle { 
  font-size: 15px; 
  color: var(--drumst-text-muted, #666); 
  margin: 0;
}

.header-contacts { 
  font-size: 16px; 
  color: var(--drumst-text-muted, #666); 
  font-weight: 400; 
  line-height: 1.3; 
}

/* ======= ВЕРХНЯЯ ПАНЕЛЬ КОНСТРУКТОРА ======= */
.builder-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: var(--drumst-bg-card, white);
  border-bottom: 1px solid var(--drumst-border, #eaeaea);
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  z-index: 2000;
  box-shadow: var(--shadow);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.builder-header-content {
  max-width: var(--page-max);
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Переключатель режимов */
.builder-mode-switch {
  display: flex;
  background: var(--drumst-bg-subtle, #f0f2f5);
  border-radius: var(--radius-2xl, 30px);
  padding: var(--space-xs);
}

.switch-label {
  padding: var(--space-sm) var(--space-lg);
  border-radius: 26px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  color: var(--drumst-text-muted, #666);
  text-decoration: none;
  transition: all var(--transition-base);
}

.switch-label.active {
  background: var(--drumst-bg-card, white);
  color: var(--primary-green);
  box-shadow: var(--shadow);
}

/* ======= ОСНОВНОЙ ЛЭЙАУТ ======= */
.landing-public-mode {
  margin-top: var(--header-h);
  height: calc(100vh - var(--header-h));
  overflow: hidden;
}

.landing-layout-flex {
  display: flex;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: var(--space-lg) var(--gutter);
  height: 100%;
  gap: var(--space-xl);
  background: transparent !important;
}

/* ======= ЛЕВОЕ МЕНЮ ======= */
.landing-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  height: 100%;
  overflow-y: auto;
  scrollbar-width: none;
  position: sticky;
  top: calc(var(--header-h) + var(--space-lg));
  background: transparent;
}

.landing-sidebar::-webkit-scrollbar {
  display: none;
}

.course-sidebar-wrapper {
  width: var(--sidebar-w) !important;
  background: var(--drumst-bg-card, white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--drumst-border, #eaeaea);
  padding: var(--space-lg) 0;
  min-height: 100%;
  box-sizing: border-box;
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.course-header {
  font-size: 22px;
  font-weight: 600;
  margin: 0 var(--space-lg) var(--space-lg) var(--space-lg);
  color: var(--drumst-text-heading, #2c3e50);
}

/* Прогресс */
.progress-wrapper {
  margin: 0 var(--space-lg) 25px var(--space-lg);
  padding: var(--space-md);
  background: var(--drumst-bg-subtle, #f8f9fa);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base);
}

.progress-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
}

.progress-label span {
  font-size: 18px;
  color: var(--drumst-text-muted, #999);
  font-weight: 400;
}

.progress-percent {
  font-size: 18px;
  color: var(--drumst-text-muted, #999);
  white-space: nowrap;
  margin-left: auto;
}

.progress-bar {
  height: var(--space-sm);
  background: var(--drumst-bg-subtle, #eaeef2);
  border-radius: var(--radius-2xl, 24px);
  overflow: hidden;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.06);
}

.progress-bar-fill,
#progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-green), #66d066);
  border-radius: var(--radius-2xl, 24px);
  transition: width var(--transition-slow);
  position: relative;
  overflow: hidden;
}

/* Анимированный эффект для заполнения прогресса */
.progress-bar-fill::after,
#progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: progressGlow 2s ease-in-out infinite;
}

@keyframes progressGlow {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Скрываем прогресс в режиме редактирования */
.builder-mode-edit .progress-wrapper {
  display: none;
}

/* Меню */
.menu-items-container {
  padding: 0 10px;
}

.menu-group {
  margin-bottom: var(--space-md);
}

.menu-group-title {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: var(--space-sm) 0 var(--space-sm) var(--space-lg);
  font-size: 18px;
  font-weight: 500;
  color: var(--drumst-text-heading, #2c3e50);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.menu-group-title:hover {
  background: var(--drumst-bg-subtle, #f5f7f9);
}

.menu-group-title img {
  width: 26px;
  height: 26px;
  margin-right: var(--space-sm) + 4px;
  margin-left: var(--space-sm) + 4px;
  flex-shrink: 0;
  transition: transform var(--transition-slow);
}

.menu-group-content {
  display: none;
  margin-left: 22px;
  padding-left: 38px;
}

.menu-group-content.open {
  display: block;
}

.course-step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 6px 7px var(--space-md);
  font-size: 17px;
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-base);
  margin: 2px 0;
  position: relative;
  box-sizing: border-box;
}

.course-step:hover {
  background: var(--drumst-bg-subtle, #f5f7f9);
}

.course-step.active {
  background: var(--light-green);
  font-weight: 600;
}

.course-step.active a {
  color: var(--drumst-color-success, #276444);
}

.course-step a {
  text-decoration: none;
  color: var(--drumst-text-primary, #333);
  flex: 1;
  font-size: 17px;
  margin-left: var(--space-sm) + 4px;
  white-space: normal;
  word-break: break-word;
  transition: color var(--transition-base);
}

.course-step img {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.course-step.disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* ======= ОСНОВНОЙ КОНТЕНТ ======= */
.landing-main {
  flex: 1;
  height: 100%;
  overflow-y: auto;
  scrollbar-width: none;
  position: relative;
  margin-top: 0;
}

.landing-main::-webkit-scrollbar {
  display: none;
}

#content-container {
  background: var(--drumst-bg-card, white);
  border-radius: var(--border-radius);
  border: 1px solid var(--drumst-border, #eaeaea);
  box-shadow: var(--shadow);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
  position: relative;
  box-sizing: border-box;
  font-size: 18px;
  line-height: 1.6;
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

/* Типографика */
#content-container h1 {
  font-size: 42px;
  font-weight: 700;
  color: var(--drumst-text-heading, #2c3e50);
  margin: 0 0 25px 0;
  border-bottom: none;
  transition: color var(--transition-base);
}

#content-container h2 {
  font-size: 32px;
  font-weight: 600;
  color: var(--drumst-text-heading, #2c3e50);
  margin: var(--space-xl) 0 var(--space-lg) 0;
  transition: color var(--transition-base);
}

#content-container h3 {
  font-size: 26px;
  font-weight: 600;
  color: var(--drumst-text-heading, #34495e);
  margin: 25px 0 var(--space-md) 0;
  transition: color var(--transition-base);
}

#content-container p {
  font-size: 18px;
  line-height: 1.6;
  color: var(--drumst-text-primary, #333);
  margin: 0 0 var(--space-lg) 0;
  transition: color var(--transition-base);
}

/* ======= БЛОКИ КОНТЕНТА ======= */
.builder-block {
  background: var(--drumst-bg-card, white);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  position: relative;
  transition: all var(--transition-base);
}

.builder-mode-view .builder-block:hover {
  border-color: var(--drumst-border, #eaeaea);
}

.builder-mode-edit .builder-block:hover {
  border-color: var(--drumst-border, #ddd);
  box-shadow: var(--shadow);
}

.builder-mode-edit .builder-block.edit-mode {
  border-color: var(--primary-green);
  box-shadow: var(--drumst-shadow-focus, 0 0 0 3px rgba(92,184,92,0.1));
}

.content-block {
  max-width: 800px;
  margin: 0;
  font-size: 18px;
  line-height: 1.6;
}

/* ======= ВИДЕО СЕКЦИИ ======= */
.video-section {
  margin: var(--space-xl) 0;
}

.video-container {
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius-md);
  overflow: hidden;
}

/* ======= ВОПРОСЫ ======= */
.question-block {
  background: var(--drumst-bg-subtle, #f8f9fa);
  border-radius: var(--border-radius);
  padding: 25px;
  margin: var(--space-lg) 0;
  transition: background-color var(--transition-base);
}

.question-text {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--space-lg);
  color: var(--drumst-text-heading, #2c3e50);
  transition: color var(--transition-base);
}

.options-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.option-item {
  margin-bottom: var(--space-sm) + 4px;
}

.option-item label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  cursor: pointer;
}

.option-item input[type="radio"],
.option-item input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--primary-green);
}

.option-item input[type="radio"]:checked + span,
.option-item input[type="checkbox"]:checked + span {
  color: var(--primary-green);
  font-weight: 500;
}

.answer-result {
  margin-top: var(--space-md);
  padding: var(--space-sm) + 4px;
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: all var(--transition-base);
}

.answer-result.correct {
  background: var(--light-green);
  color: var(--drumst-color-success, #27ae60);
}

.answer-result.incorrect {
  background: var(--drumst-bg-danger, #fde8e8);
  color: var(--error-red);
}

/* ======= НАВИГАЦИЯ ======= */
.nav-wrapper {
  display: flex;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
  padding-bottom: var(--space-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.nav-wrapper.visible {
  opacity: 1;
  pointer-events: auto;
}

.nav-button {
  flex: 1;
  padding: var(--space-md);
  border: none;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: all var(--transition-slow);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  touch-action: manipulation;
}

.btn-back {
  background: var(--drumst-bg-card, white);
  border: 1px solid var(--drumst-border, #ddd);
  color: rgba(92,184,92,0.6);
  transition: all var(--transition-base);
}

.btn-back:hover {
  border-color: var(--primary-green);
  color: var(--primary-green);
  transform: translateY(-1px);
}

.btn-next {
  background: var(--primary-green);
  color: white;
  transition: all var(--transition-base);
}

.btn-next:hover {
  background: var(--drumst-color-success, #4cae4c);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(92,184,92,0.3);
}

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

.nav-button.is-hidden {
  display: none !important;
}

/* ======= ПАНЕЛИ УПРАВЛЕНИЯ БЛОКОМ (ТОЛЬКО РЕЖИМ РЕДАКТИРОВАНИЯ) ======= */
.builder-mode-edit .block-format-panel,
.builder-mode-edit .block-controls {
    position: absolute;
    top: -20px;
    display: none;
    align-items: center;
    gap: var(--space-xs);
    background: var(--drumst-bg-card, white);
    padding: 6px 10px;
    border-radius: var(--radius-2xl, 30px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border: 1px solid var(--drumst-border, #eaeaea);
    z-index: 150;
    height: 36px;
    transition: opacity var(--transition-fast);
}

.builder-mode-edit .block-format-panel {
    left: 10px;
}

.builder-mode-edit .block-controls {
    right: 10px;
}

.builder-mode-edit .builder-block:hover .block-format-panel,
.builder-mode-edit .builder-block:hover .block-controls {
    display: flex;
}

/* Кнопки в панелях */
.builder-mode-edit .format-btn,
.builder-mode-edit .block-control-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm) + 2px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--drumst-text-muted, #555);
    font-size: 14px;
    transition: all var(--transition-base);
}

.builder-mode-edit .format-btn:hover,
.builder-mode-edit .block-control-btn:hover {
    background: var(--drumst-bg-subtle, #f0f0f0);
}

.builder-mode-edit .format-btn.active {
    background: var(--light-green);
    color: var(--primary-green);
}

.builder-mode-edit .block-control-btn.move-up:hover,
.builder-mode-edit .block-control-btn.move-down:hover {
    color: var(--primary-green);
}

.builder-mode-edit .block-control-btn.delete:hover {
    color: var(--error-red);
}

/* Селекты в левой панели */
.builder-mode-edit .format-select {
    height: 28px;
    border: 1px solid var(--drumst-border, #ddd);
    border-radius: var(--radius-sm) + 2px;
    background: var(--drumst-bg-card, white);
    color: var(--drumst-text-muted, #555);
    font-size: 12px;
    padding: 0 var(--space-xs);
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.builder-mode-edit .format-select:hover {
    border-color: var(--primary-green);
}

/* Разделитель в панелях */
.builder-mode-edit .panel-divider {
    width: 1px;
    height: 20px;
    background: var(--drumst-border, #ddd);
    margin: 0 var(--space-xs);
}

/* Элементы управления меню (только режим редактирования) */
.builder-mode-edit .menu-item-controls {
  display: none;
  align-items: center;
  gap: var(--space-xs);
  margin-left: auto;
  padding-right: var(--space-sm);
}

.builder-mode-edit .builder-menu-item:hover .menu-item-controls {
  display: flex;
}

.builder-mode-edit .menu-control-btn {
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--drumst-text-muted, #666);
  font-size: 14px;
  transition: all var(--transition-base);
}

.builder-mode-edit .menu-control-btn:hover {
  background: var(--drumst-bg-subtle, #f0f0f0);
}

.builder-mode-edit .menu-control-btn.move-up:hover,
.builder-mode-edit .menu-control-btn.move-down:hover {
  color: var(--primary-green);
}

.builder-mode-edit .menu-control-btn.delete:hover {
  color: var(--error-red);
}

/* Редактирование названия пункта меню */
.menu-item-title {
  flex: 1;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: text;
}

.menu-item-title.editing {
  border-color: var(--primary-green);
  background: var(--drumst-bg-card, white);
  outline: none;
}

/* Панель добавления блоков */
.builder-mode-edit .add-block-bar {
  margin: var(--space-xl) 0;
  padding: var(--space-lg);
  border: 2px dashed var(--drumst-border, #ddd);
  border-radius: var(--border-radius);
  text-align: center;
  background: var(--drumst-bg-subtle, #fafafa);
  transition: all var(--transition-base);
}

.builder-mode-edit .add-block-bar:hover {
  border-color: var(--primary-green);
  background: var(--drumst-bg-subtle, #f9f9f9);
}

.builder-mode-edit .add-block-types {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  margin-top: var(--space-md);
}

.builder-mode-edit .add-block-type-btn {
  padding: 6px var(--space-sm) + 4px;
  background: var(--drumst-bg-card, white);
  border: 1px solid var(--drumst-border, #ddd);
  border-radius: var(--space-lg);
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  transition: all var(--transition-base);
}

.builder-mode-edit .add-block-type-btn:hover {
  background: var(--primary-green);
  color: white;
  border-color: var(--primary-green);
}

/* ======= РАМКИ ДЛЯ БЛОКОВ (ВСЕ РЕЖИМЫ) ======= */
.builder-block.has-frame {
    border: 2px solid;
    border-radius: var(--radius-lg);
    padding: 25px 25px 25px 70px;
    margin-bottom: var(--space-xl);
    position: relative;
}

.builder-block.has-frame + .builder-block.has-frame {
    margin-top: 60px;
}

.builder-block.frame-purple {
    border-color: var(--frame-color, #9b59b6);
}

.builder-block.frame-blue {
    border-color: var(--frame-color, #3498db);
}

.builder-block.frame-green {
    border-color: var(--frame-color, #2ecc71);
}

.builder-block.frame-orange {
    border-color: var(--frame-color, #e67e22);
}

.builder-block.frame-red {
    border-color: var(--frame-color, #e74c3c);
}

.frame-purple { --frame-color: #9b59b6; }
.frame-blue { --frame-color: #3498db; }
.frame-green { --frame-color: #2ecc71; }
.frame-orange { --frame-color: #e67e22; }
.frame-red { --frame-color: #e74c3c; }

.frame-icon-display.frame-purple,
.frame-icon-display.frame-blue,
.frame-icon-display.frame-green,
.frame-icon-display.frame-orange,
.frame-icon-display.frame-red {
    color: var(--frame-color, inherit);
}

/* Иконка внутри рамки (слева, внутри блока) */
.builder-block .frame-icon-display {
    position: absolute;
    left: var(--space-lg);
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: inherit;
    background: transparent;
    border: none;
    box-shadow: none;
}

.builder-mode-edit .builder-block .frame-icon-display {
    color: inherit;
}

.builder-block .frame-icon-display i,
.builder-block .frame-icon-display svg {
    color: inherit;
    fill: currentColor;
    width: 24px;
    height: 24px;
    font-size: 24px;
}

.builder-mode-edit .builder-block .frame-icon-display {
    color: inherit;
    font-size: 24px;
}

.builder-block.has-frame .content-block {
    color: var(--drumst-text-primary, #333);
}

.builder-block.has-frame h1,
.builder-block.has-frame h2,
.builder-block.has-frame h3 {
    margin-top: 0;
    color: inherit;
}

@media (max-width: 768px) {
    .builder-block.has-frame {
        padding: var(--space-lg) var(--space-lg) var(--space-lg) 60px;
    }
    
    .builder-block .frame-icon-display {
        left: var(--space-md);
        width: 28px;
        height: 28px;
        font-size: 20px;
    }
}

/* ======= РЕДАКТИРУЕМЫЕ ЭЛЕМЕНТЫ ======= */
[contenteditable="true"] {
  outline: none;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  cursor: text;
  transition: background var(--transition-base);
}

[contenteditable="true"]:hover {
  background: var(--drumst-bg-subtle, #f9f9f9);
}

[contenteditable="true"]:focus {
  background: var(--drumst-bg-card, white);
  box-shadow: var(--drumst-shadow-focus-sm, 0 0 0 2px rgba(92,184,92,0.2));
}

/* ======= МОДАЛЬНОЕ ОКНО ======= */
#thank-you-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}

#thank-you-modal.visible {
  display: flex;
}

#thank-you-modal .modal-backdrop {
  position: fixed;
  z-index: 9999;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0,0,0,0.55);
}

#thank-you-modal .modal-content {
  position: fixed;
  z-index: 10000;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--drumst-bg-card, white);
  padding: var(--space-xl) 42px 34px 42px;
  border-radius: var(--radius-lg);
  text-align: center;
  min-width: 400px;
  max-width: 700px;
  width: 100%;
  box-shadow: var(--drumst-shadow-lg, 0 10px 40px rgba(70,90,100,0.12));
  box-sizing: border-box;
  transition: background-color var(--transition-base);
}

#thank-you-modal h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--drumst-text-primary, #222);
  margin: 0 0 var(--space-md) 0;
}

#thank-you-modal .modal-btn {
  margin-top: var(--space-lg);
  padding: 13px 38px;
  background: var(--primary-green);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 17px;
  cursor: pointer;
  transition: all var(--transition-base);
}

#thank-you-modal .modal-btn:hover {
  background: var(--drumst-color-success, #419b53);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(92,184,92,0.3);
}

/* ======= DRAG AND DROP ======= */
.dragging {
  opacity: 0.5;
  background: var(--light-green);
}

.drag-over {
  border-top: 2px solid var(--primary-green) !important;
}

/* ======= УТИЛИТЫ ======= */
.is-hidden {
  display: none !important;
}

/* ======= АДАПТИВНОСТЬ ======= */
@media (max-width: 992px) {
  html, body {
    height: auto;
    overflow: auto;
  }
  
  .landing-layout-flex {
    flex-direction: column;
    height: auto;
    padding: 0 var(--space-lg);
  }
  
  .landing-sidebar,
  .course-sidebar-wrapper {
    width: 100% !important;
    position: static;
    height: auto;
    margin-bottom: var(--space-lg);
  }
  
  .header-wrapper {
    flex-direction: column;
    padding: var(--space-lg);
  }
  
  #content-container {
    position: static;
    width: auto;
    height: auto;
    margin: 0 auto;
    padding: var(--space-lg);
  }
  
  .nav-wrapper {
    position: static;
    flex-direction: column;
    margin: var(--space-lg) 0 var(--space-xl) 0;
    gap: 10px;
  }
  
  .nav-button {
    width: 100%;
  }
  
  .landing-public-mode {
    height: auto;
    overflow: visible;
    margin-top: 80px;
  }
  
  .landing-sidebar {
    display: none;
  }
}

@media (max-width: 576px) {
  .header-title {
    font-size: 15px;
  }
  
  .header-right {
    display: none;
  }
  
  #content-container h1 {
    font-size: 28px;
  }
  
  #content-container h2 {
    font-size: 22px;
  }
  
  #content-container h3 {
    font-size: 20px;
  }
  
  #content-container p {
    font-size: 16px;
  }
  
  .nav-button {
    padding: 12px;
    font-size: 15px;
  }
  
  .course-step {
    font-size: 15px;
  }
}

/* Для Font Awesome иконок */
.builder-block .frame-icon-display i {
    color: inherit;
    font-size: 24px;
}

.builder-block .frame-icon-display svg {
    fill: currentColor;
    width: 24px;
    height: 24px;
}

/* Lightbox для изображений */
.image-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    cursor: pointer;
}
.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
}
.lightbox-content img {
    max-width: 100%;
    max-height: 90vh;
    border-radius: var(--radius-md);
}
.lightbox-close {
    position: absolute;
    top: -30px;
    right: -30px;
    color: white;
    font-size: 40px;
    cursor: pointer;
    background: rgba(0,0,0,0.5);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}
.lightbox-close:hover {
    background: rgba(255,255,255,0.2);
}

/* Кнопки загрузки в блоках */
.btn-sm {
    padding: 6px 12px;
    font-size: 14px;
    border-radius: var(--radius-sm) + 2px;
}
.btn-secondary {
    background: var(--drumst-text-muted, #6c757d);
    color: white;
    border: none;
}
.btn-secondary:hover {
    background: var(--drumst-text-muted, #5a6268);
}
.upload-status {
    font-size: 14px;
}

/* Видео контейнер */
.video-container {
    max-width: 800px;
    margin: 0 auto;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--drumst-bg-page, #000);
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-container video,
.video-container iframe {
    width: 100%;
    height: auto;
    min-height: 300px;
    border: none;
}

.video-container iframe {
    aspect-ratio: 16/9;
}

/* Показываем панель форматирования только для текстовых блоков в режиме редактирования */
.builder-mode-edit .builder-block[data-block-type="text"]:hover .block-format-panel,
.builder-mode-edit .builder-block[data-block-type="text"]:hover .block-controls {
    display: flex;
}

.builder-mode-edit .builder-block:not([data-block-type="text"]):hover .block-controls {
    display: flex;
}

.builder-mode-edit .builder-block:not([data-block-type="text"]):hover .block-format-panel {
    display: none !important;
}

/* ======= ТЁМНАЯ ТЕМА (улучшенная) ======= */
[data-portal-style="dark"],
[data-portal-style="canvas-dark"] {
  --drumst-bg-page: #111a22;
  --drumst-bg-card: #1a2733;
  --drumst-bg-subtle: #233140;
  --drumst-text-primary: #d0d8e0;
  --drumst-text-heading: #e0e6ed;
  --drumst-text-muted: #88929c;
  --drumst-text-muted-light: #6a7a8a;
  --drumst-border: #34495e;
  --drumst-color-success: #5cb85c;
  --drumst-color-danger: #e74c3c;
  --drumst-color-warning: #f39c12;
  --drumst-bg-success: #1a3a2e;
  --drumst-bg-danger: #3a1a1a;
  --drumst-shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --drumst-shadow-md: 0 4px 20px rgba(0,0,0,0.3);
  --drumst-shadow-lg: 0 10px 40px rgba(0,0,0,0.4);

  --primary-green: #5cb85c;
  --light-green: #1a3a2e;
  --error-red: #e74c3c;
  --gray-bg: #111a22;
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
  --border-radius: 12px;
}

/* ======= АУДИО БЛОК ======= */
.audio-section {
  margin: var(--space-lg) 0;
}

.audio-container {
  max-width: 800px;
  margin: 0 auto;
}

.audio-container audio {
  width: 100%;
  border-radius: var(--radius-md);
}

/* ======= СТИЛИ ДЛЯ НОВЫХ БЛОКОВ (button, divider) ======= */

/* Button Block */
.builder-block .block-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  border: 2px solid transparent;
  line-height: 1.4;
  gap: var(--space-sm);
}

.block-btn--primary {
  background: var(--primary-green);
  color: #fff;
  border-color: var(--primary-green);
}

.block-btn--primary:hover {
  background: var(--drumst-color-success-hover, #4cae4c);
  border-color: var(--drumst-color-success-hover, #4cae4c);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(92,184,92,0.3);
}

.block-btn--secondary {
  background: var(--drumst-text-muted, #6c757d);
  color: #fff;
  border-color: var(--drumst-text-muted, #6c757d);
}

.block-btn--secondary:hover {
  background: #5a6268;
  border-color: #5a6268;
  transform: translateY(-1px);
}

.block-btn--outline {
  background: transparent;
  color: var(--primary-green);
  border-color: var(--primary-green);
}

.block-btn--outline:hover {
  background: var(--primary-green);
  color: #fff;
  transform: translateY(-1px);
}

/* Divider Block */
.block-divider {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: var(--space-xl) 0;
  color: var(--drumst-text-muted, #999);
  font-size: 14px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.block-divider::before,
.block-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--drumst-border, #eaeaea);
}

.block-divider-label {
  white-space: nowrap;
  padding: 0 var(--space-sm);
}

/* Text Frame (улучшенный) */
.text-frame {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  border: 2px solid;
  background: var(--drumst-bg-card, #fff);
  box-shadow: var(--drumst-shadow-sm, 0 2px 8px rgba(0,0,0,0.05));
}

.text-frame.frame-green { border-color: var(--frame-color, #2ecc71); }
.text-frame.frame-blue { border-color: var(--frame-color, #3498db); }
.text-frame.frame-purple { border-color: var(--frame-color, #9b59b6); }
.text-frame.frame-orange { border-color: var(--frame-color, #e67e22); }
.text-frame.frame-red { border-color: var(--frame-color, #e74c3c); }

.text-frame .frame-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
  color: #fff;
}

.frame-green .frame-icon { background: #2ecc71; }
.frame-blue .frame-icon { background: #3498db; }
.frame-purple .frame-icon { background: #9b59b6; }
.frame-orange .frame-icon { background: #e67e22; }
.frame-red .frame-icon { background: #e74c3c; }

.text-frame .frame-text {
  flex: 1;
  font-size: 16px;
  line-height: 1.6;
  color: var(--drumst-text-primary, #333);
}

/* Изображение */
.image-block img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  display: block;
}

.image-block .image-block-placeholder {
  padding: var(--space-xl);
  text-align: center;
  background: var(--drumst-bg-subtle, #f5f5f5);
  border-radius: var(--radius-md);
  color: var(--drumst-text-muted, #999);
  font-size: 14px;
}

.image-block .image-caption {
  font-size: 14px;
  color: var(--drumst-text-muted, #999);
  margin-top: var(--space-sm);
  text-align: center;
}

/* Улучшенный скроллбар (Webkit) */
.landing-main::-webkit-scrollbar {
  width: 6px;
}
.landing-main::-webkit-scrollbar-track {
  background: transparent;
}
.landing-main::-webkit-scrollbar-thumb {
  background: var(--drumst-border, #ddd);
  border-radius: 3px;
}
.landing-main::-webkit-scrollbar-thumb:hover {
  background: var(--drumst-text-muted, #999);
}