/* ====================================================
   ЧЕРНО-БЕЛЫЙ СТРОГИЙ ДИЗАЙН (ЕДИНЫЙ СТИЛЬ)
   ==================================================== */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f4f4f5;
  --bg-dark: #09090b;
  --text-main: #09090b;
  --text-muted: #71717a;
  --border-color: #e4e4e7;
  --card-bg: #ffffff;
  
  /* Акценты в строгом черно-белом / монохромном ключе */
  --accent-main: #09090b;
  --accent-hover: #27272a;
  --accent-text: #ffffff;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--bg-secondary);
  color: var(--text-main);
  line-height: 1.5;
}

/* ====================================================
   ЛЭЯУТ И КОНТЕЙНЕРЫ
   ==================================================== */
.dashboard-container,
.app-layout {
  display: flex;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  padding: 32px 40px;
  background-color: var(--bg-secondary);
  overflow-y: auto;
  padding-top: 72px !important; /* Учет фиксированной кнопки */
}

.dashboard-section,
.quiz-builder-form {
  max-width: 1200px;
  margin: 0 auto;
}

.hidden {
  display: none !important;
}

.section-header {
  margin-bottom: 28px;
}

.section-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.section-header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ====================================================
   БОКОВОЕ МЕНЮ (SIDEBAR) - СТРОГИЙ ЧЕРНЫЙ СТИЛЬ
   ==================================================== */
.sidebar {
  width: 280px;
  max-width: 85vw;
  background-color: var(--bg-dark);
  color: #ffffff;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  height: 100vh !important;
  z-index: 9998 !important;
  transform: translateX(-100%) !important;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.3) !important;
}

.sidebar.active {
  transform: translateX(0) !important;
}

.brand, .logo {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding: 0 8px;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.brand h2, .logo h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.5px;
}

.role-badge, .logo .role {
  background: rgba(255, 255, 255, 0.1);
  color: #a1a1aa;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-btn {
  background: transparent;
  border: none;
  color: #a1a1aa;
  padding: 10px 14px;
  border-radius: 8px;
  text-align: left;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
}

.nav-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
}

.nav-btn.active {
  background: #ffffff;
  color: #09090b;
  font-weight: 600;
}

.nav-btn.primary {
  background: #ffffff;
  color: #09090b;
  font-weight: 600;
  margin-top: 12px;
}

.nav-btn.primary:hover {
  background: #e4e4e7;
}

.sidebar-divider {
  height: 1px;
  background: #27272a;
  margin: 20px 0;
}

.sidebar-section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #71717a;
  margin-bottom: 10px;
  padding: 0 8px;
}

.sidebar-quiz-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sidebar-quiz-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #d4d4d8;
  padding: 8px 12px;
  border-radius: 6px;
  text-align: left;
  font-size: 0.8rem;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background 0.2s;
}

.sidebar-quiz-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
}

/* ====================================================
    КАРТОЧКИ И СЕТКИ (QUIZZES & MATERIALS)
   ==================================================== */
.quizzes-grid, .materials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.quiz-card, .material-card, .form-card, .question-build-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
  transition: transform 0.2s, box-shadow 0.2s;
}

.material-card:hover, .quiz-card:hover {
  border-color: #a1a1aa;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.quiz-card h3, .material-info h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.35;
}

.quiz-card p, .material-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.material-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.material-icon {
  font-size: 1.8rem;
  background: var(--bg-secondary);
  padding: 8px 12px;
  border-radius: 8px;
  line-height: 1;
}

.material-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
}

/* ====================================================
   КНОПКИ (УНИФИЦИРОВАННЫЕ)
   ==================================================== */
.btn, .btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn.primary, .btn-download {
  background-color: var(--accent-main);
  color: var(--accent-text);
}

.btn.primary:hover, .btn-download:hover {
  background-color: var(--accent-hover);
}

.btn.secondary, .filter-btn {
  background-color: var(--bg-secondary);
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn.secondary:hover, .filter-btn:hover {
  background-color: #e4e4e7;
}

.btn.danger {
  background-color: #fef2f2;
  color: #dc2626;
  border-color: #fecaca;
}

.filter-btn.active {
  background-color: var(--accent-main);
  color: var(--accent-text);
  border-color: var(--accent-main);
}

/* ====================================================
   ТАБЛИЦЫ И СТАТУСЫ
   ==================================================== */
.table-container, .table-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.data-table th {
  background-color: var(--bg-secondary);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
}

.data-table tr:last-child td {
  border-bottom: none;
}

/* Монохромные / строгие статусы вместо цветастых светофоров */
.badge-status {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.badge-status.passed {
  background-color: #f4f4f5;
  color: #09090b;
  border-color: #d4d4d8;
}

.badge-status.failed {
  background-color: #fef2f2;
  color: #7f1d1d;
  border-color: #fecaca;
}

/* ====================================================
   ФОРМЫ И ПОЛЯ ВВОДА
   ==================================================== */
.quiz-builder-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
}

.form-group input, 
.form-group textarea, 
.form-group select {
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.95rem;
  background-color: var(--card-bg);
  color: var(--text-main);
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus, 
.form-group textarea:focus, 
.form-group select:focus {
  border-color: var(--accent-main);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.builder-actions {
  display: flex;
  gap: 16px;
}

/* ====================================================
   МОБИЛЬНАЯ НАВИГАЦИЯ И ГАМБУРГЕР
   ==================================================== */
.mobile-nav-toggle {
  display: flex !important;
  position: fixed !important;
  top: 12px !important;
  left: 12px !important;
  z-index: 9999 !important;
  width: 46px !important;
  height: 46px !important;
  background-color: var(--bg-dark) !important;
  border: 1px solid rgba(255, 255, 255, 0.25) !important;
  border-radius: 10px !important;
  cursor: pointer !important;
  flex-direction: column !important;
  justify-content: center !important;
  align-items: center !important;
  gap: 5px !important;
  padding: 8px !important;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25) !important;
  -webkit-tap-highlight-color: transparent;
}

.mobile-nav-toggle span {
  display: block !important;
  width: 22px !important;
  height: 2px !important;
  background-color: #ffffff !important;
  border-radius: 2px !important;
  pointer-events: none;
}

.sidebar-overlay {
  display: none;
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  background: rgba(9, 9, 11, 0.6) !important;
  backdrop-filter: blur(3px) !important;
  -webkit-backdrop-filter: blur(3px) !important;
  z-index: 9997 !important;
  opacity: 0;
  transition: opacity 0.25s ease !important;
}

.sidebar-overlay.active {
  display: block !important;
  opacity: 1 !important;
}