/* ==========================================================================
   Karazin Schedule (Розклад Каразіна) Design System
   ========================================================================== */

:root {
  /* Brand Palettes */
  --karazin-blue: #2563eb;
  --karazin-blue-light: #60a5fa;
  --karazin-gold: #f59e0b;
  --karazin-gold-glow: rgba(245, 158, 11, 0.3);

  /* Types Badges */
  --type-lecture: #8b5cf6;
  --type-lecture-bg: rgba(139, 92, 246, 0.15);
  --type-practice: #0ea5e9;
  --type-practice-bg: rgba(14, 165, 233, 0.15);
  --type-lab: #f97316;
  --type-lab-bg: rgba(249, 115, 22, 0.15);
  --type-seminar: #10b981;
  --type-seminar-bg: rgba(16, 185, 129, 0.15);
  --type-other: #64748b;
  --type-other-bg: rgba(100, 116, 139, 0.15);

  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark Theme (Default) */
[data-theme="dark"] {
  --bg-app: #090d16;
  --bg-surface: rgba(17, 24, 39, 0.72);
  --bg-surface-elevated: rgba(26, 35, 54, 0.85);
  --bg-input: rgba(15, 23, 42, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(59, 130, 246, 0.6);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --glass-border: 1px solid rgba(255, 255, 255, 0.08);
  --glow-accent: rgba(59, 130, 246, 0.25);
  --live-card-bg: linear-gradient(135deg, rgba(37, 99, 235, 0.18), rgba(16, 185, 129, 0.12));
  --live-card-border: rgba(59, 130, 246, 0.35);
}

/* Light Theme */
[data-theme="light"] {
  --bg-app: #f1f5f9;
  --bg-surface: rgba(255, 255, 255, 0.88);
  --bg-surface-elevated: #ffffff;
  --bg-input: #f8fafc;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-focus: #2563eb;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
  --glass-border: 1px solid rgba(0, 0, 0, 0.08);
  --glow-accent: rgba(37, 99, 235, 0.15);
  --live-card-bg: linear-gradient(135deg, rgba(219, 234, 254, 0.8), rgba(209, 250, 229, 0.6));
  --live-card-border: rgba(37, 99, 235, 0.25);
}

/* Base Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-app);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  background-image: 
    radial-gradient(at 10% 10%, rgba(37, 99, 235, 0.12) 0px, transparent 50%),
    radial-gradient(at 90% 90%, rgba(245, 158, 11, 0.08) 0px, transparent 50%);
  background-attachment: fixed;
  overflow-x: hidden;
}

.app-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Top Navigation */
.top-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: var(--bg-surface);
  border-bottom: var(--glass-border);
  transition: background var(--transition-smooth);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  cursor: pointer;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #1d4ed8, #2563eb);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-badge {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--karazin-gold), #d97706);
  color: #fff;
  padding: 2px 6px;
  border-radius: 6px;
  letter-spacing: 0.05em;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Favorites (Multi-group switcher) */
.favorites-container {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  max-width: 420px;
}

.favorites-container::-webkit-scrollbar {
  display: none;
}

.fav-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}

.fav-chips {
  display: flex;
  gap: 6px;
}

.fav-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--bg-input);
  color: var(--text-secondary);
  border: var(--glass-border);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.fav-chip:hover {
  border-color: var(--karazin-blue);
  color: var(--text-primary);
}

.fav-chip.active {
  background: linear-gradient(135deg, #1d4ed8, #2563eb);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.fav-chip .remove-fav {
  font-size: 0.75rem;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.fav-chip .remove-fav:hover {
  opacity: 1;
  color: #f87171;
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-input);
  border: var(--glass-border);
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  border-color: var(--border-focus);
  color: var(--text-primary);
  background: var(--bg-surface-elevated);
}


/* Main Container */
.main-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  flex: 1;
  width: 100%;
}

/* Hero Search Card */
.hero-search-section {
  margin-bottom: 24px;
}

.search-box-card {
  position: relative;
  background: var(--bg-surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  box-shadow: var(--card-shadow);
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.search-box-card:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--glow-accent);
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  border: var(--glass-border);
}

.search-icon {
  color: var(--text-muted);
  display: flex;
  align-items: center;
}

.group-search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-main);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.group-search-input::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

.clear-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px;
  border-radius: 50%;
  line-height: 1;
}

.clear-btn:hover {
  color: var(--text-primary);
}

/* Search Dropdown */
.search-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--bg-surface-elevated);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  max-height: 320px;
  overflow-y: auto;
  z-index: 50;
  padding: 8px;
}

.dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.dropdown-item:hover, .dropdown-item.focused {
  background: var(--karazin-blue);
  color: #fff;
}

.dropdown-item .badge {
  font-size: 0.7rem;
  opacity: 0.8;
  font-weight: 500;
}

.dropdown-empty {
  padding: 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Filters and Faculty Custom Select */
.search-filters {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-top: 14px;
  gap: 16px;
  width: 100%;
}

.custom-select-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-input);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  padding: 6px 14px;
  width: 100%;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.custom-select-wrapper:focus-within,
.custom-select-wrapper.open {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.filter-icon {
  display: flex;
  align-items: center;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.custom-select-trigger {
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-main);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: 2px 0;
  text-align: left;
}

.custom-select-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding-right: 8px;
}

.dropdown-chevron {
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.custom-select-wrapper.open .dropdown-chevron {
  transform: rotate(180deg);
}

.custom-select-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: #0d1322;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.75);
  max-height: 290px;
  overflow-y: auto;
  z-index: 150;
  padding: 6px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.custom-select-menu::-webkit-scrollbar {
  width: 6px;
}

.custom-select-menu::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
}

.custom-select-option {
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.14s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.custom-select-option:hover {
  background: rgba(37, 99, 235, 0.2);
  color: #ffffff;
}

.custom-select-option.selected {
  background: rgba(37, 99, 235, 0.32);
  color: #60a5fa;
  font-weight: 700;
}

/* Dedicated Active Group Header Section */
.active-group-section {
  max-width: 1200px;
  margin: 0 auto 1.25rem;
  animation: fadeIn 0.3s ease-out;
}

.active-group-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
  box-shadow: var(--card-shadow);
  gap: 12px;
  flex-wrap: wrap;
}

.active-group-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.active-group-badge-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.active-group-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.active-group-left .fav-toggle-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  color: #64748b;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.active-group-left .fav-toggle-btn:hover {
  color: var(--karazin-gold);
  transform: scale(1.15);
}

.active-group-left .fav-toggle-btn.active {
  color: var(--karazin-gold);
}

.active-group-left .fav-toggle-btn.active .star-icon {
  fill: currentColor;
}

.active-group-right {
  display: flex;
  align-items: center;
}

.btn-change-group {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.5rem 0.95rem;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: var(--font-main);
  color: #cbd5e1;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-change-group:hover {
  color: #ffffff;
  background: rgba(37, 99, 235, 0.25);
  border-color: rgba(59, 130, 246, 0.5);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

/* Live Status Section */
.live-status-section {
  margin-bottom: 24px;
}

.status-card {
  background: var(--live-card-bg);
  border: 1px solid var(--live-card-border);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 4px 20px -2px rgba(37, 99, 235, 0.15);
  animation: slideInDown 0.4s ease-out;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.status-details {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  flex: 1;
}

.status-time {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--karazin-blue-light);
  background: var(--bg-input);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: var(--glass-border);
}

/* Schedule Controls & Tabs */
.schedule-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 16px;
  flex-wrap: wrap;
}

.view-tabs {
  display: flex;
  background: var(--bg-surface);
  border: var(--glass-border);
  padding: 4px;
  border-radius: var(--radius-md);
  gap: 4px;
}

.tab-btn {
  background: transparent;
  border: none;
  padding: 7px 16px;
  border-radius: 10px;
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--karazin-blue);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.35);
}

.controls-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-date-btn {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: var(--glass-border);
  color: var(--text-primary);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-date-btn:hover {
  background: var(--karazin-blue);
  color: #fff;
}

.current-date-label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Schedule Welcome State */
.welcome-card {
  text-align: center;
  padding: 60px 24px;
  background: var(--bg-surface);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
}

.welcome-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.welcome-title {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.welcome-desc {
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 28px;
  font-size: 0.95rem;
}

.popular-groups {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.popular-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.popular-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.pop-chip {
  padding: 6px 14px;
  background: var(--bg-input);
  border: var(--glass-border);
  color: var(--karazin-blue-light);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pop-chip:hover {
  background: var(--karazin-blue);
  color: #fff;
  transform: translateY(-2px);
}

/* Loading State */
.loading-state {
  text-align: center;
  padding: 60px 20px;
}

.spinner {
  width: 44px;
  height: 44px;
  margin: 0 auto 16px;
  border: 3px solid rgba(37, 99, 235, 0.2);
  border-top-color: var(--karazin-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Days and Timetable Grid */
.days-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.day-card {
  background: var(--bg-surface);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: transform var(--transition-smooth), border-color var(--transition-smooth);
}

.day-card.is-today {
  border-color: rgba(37, 99, 235, 0.4);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.3), var(--card-shadow);
}

.day-header {
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.day-date-group {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.day-date {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.day-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: capitalize;
}

.day-badge-today {
  background: linear-gradient(135deg, #1d4ed8, #2563eb);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.day-lessons-list {
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Lesson Item Card */
.lesson-card {
  background: var(--bg-input);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: grid;
  grid-template-columns: 85px 1fr auto;
  gap: 16px;
  align-items: center;
  transition: all var(--transition-fast);
}

.lesson-card:hover {
  transform: translateY(-2px);
  border-color: rgba(59, 130, 246, 0.4);
  background: var(--bg-surface-elevated);
}

.lesson-card.is-current-lesson {
  border-color: #10b981;
  background: rgba(16, 185, 129, 0.08);
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.15);
}

/* Pair & Time Column */
.lesson-time-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.pair-number {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.time-range {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
}

/* Info Column */
.lesson-info-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.lesson-top-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.lesson-type-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.type-Лекція {
  background: var(--type-lecture-bg);
  color: var(--type-lecture);
}

.type-Практика {
  background: var(--type-practice-bg);
  color: var(--type-practice);
}

.type-Лабораторна {
  background: var(--type-lab-bg);
  color: var(--type-lab);
}

.type-Семінар {
  background: var(--type-seminar-bg);
  color: var(--type-seminar);
}

.stream-badge {
  font-size: 0.72rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 6px;
  border-radius: 4px;
}

.lesson-subject {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.lesson-teacher {
  font-size: 0.82rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Action / Links Column */
.lesson-action-col {
  display: flex;
  align-items: center;
  gap: 8px;
}

.join-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, #16a34a, #22c55e);
  color: #fff;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.35);
  transition: all var(--transition-fast);
}

.join-link-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(34, 197, 94, 0.45);
}

.custom-link-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: var(--glass-border);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.custom-link-btn:hover {
  color: var(--karazin-gold);
  border-color: var(--karazin-gold);
  transform: scale(1.05);
}

.custom-link-btn.has-link {
  color: var(--karazin-gold);
  border-color: rgba(245, 158, 11, 0.4);
}

/* Empty Day State */
.empty-day-row {
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Empty Global State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: var(--glass-border);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.2s ease-out;
}

.modal-card {
  background: var(--bg-surface-elevated);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 480px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  animation: scaleUp 0.2s ease-out;
}

.modal-header {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: var(--glass-border);
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.close-modal-btn {
  background: transparent;
  border: none;
  font-size: 1.2rem;
  color: var(--text-muted);
  cursor: pointer;
}

.modal-body {
  padding: 20px;
}

.modal-subject-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--karazin-blue-light);
  margin-bottom: 6px;
}

.modal-subtext {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 18px;
  line-height: 1.4;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-size: 0.95rem;
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  border-color: var(--karazin-blue);
}

.modal-footer {
  padding: 14px 20px;
  background: rgba(0, 0, 0, 0.1);
  border-top: var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.btn {
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--karazin-blue);
  color: #fff;
}

.btn-primary:hover {
  background: #1d4ed8;
}

.btn-secondary {
  background: var(--bg-input);
  color: var(--text-secondary);
  border: var(--glass-border);
}

.btn-secondary:hover {
  color: var(--text-primary);
}

.btn-outline {
  background: transparent;
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
  margin-right: auto;
}

.btn-outline:hover {
  background: rgba(239, 68, 68, 0.1);
}

/* Toast Notification */
.toast-notification {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-surface-elevated);
  border: var(--glass-border);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  z-index: 1100;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  opacity: 0;
  transition: all var(--transition-smooth);
  pointer-events: none;
}

.toast-notification.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Footer */
.app-footer {
  border-top: var(--glass-border);
  background: var(--bg-surface);
  padding: 16px 20px;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-brand {
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Keyframe Animations */
@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleUp {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

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

/* Responsive Breakpoints */
@media (max-width: 768px) {
  .nav-container {
    padding: 10px 14px;
  }

  .favorites-container {
    display: none; /* Hidden on small screens, accessible in tags */
  }

  .btn-text {
    display: none;
  }

  .lesson-card {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .lesson-time-col {
    flex-direction: row;
    align-items: center;
    gap: 8px;
    border-bottom: var(--glass-border);
    padding-bottom: 8px;
  }

  .lesson-action-col {
    justify-content: flex-start;
    padding-top: 4px;
  }

  .join-link-btn {
    flex: 1;
    justify-content: center;
  }

  .status-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .status-time {
    align-self: flex-start;
  }
}

/* ==========================================================================
   Modern Strict Glassmorphism Schedule (NURE App Design System)
   ========================================================================== */

/* Top View Switcher Capsule (День / Тиждень) */
.schedule-controls-modern {
  margin-bottom: 1.5rem;
}

.view-switcher-row {
  display: flex;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.view-pill-capsule {
  display: flex;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 9999px;
  padding: 4px;
  gap: 4px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.pill-option {
  padding: 8px 32px;
  border-radius: 9999px;
  border: none;
  background: transparent;
  color: #94a3b8;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.pill-option:hover {
  color: #f1f5f9;
}

.pill-option.active {
  background: linear-gradient(135deg, #4f7bf7, #2563eb);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(37, 99, 235, 0.45);
}

/* Calendar Month & Navigation Row */
.calendar-nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding: 0 4px;
}

.calendar-month-text {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
  margin: 0;
}

.calendar-nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-current-week {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #cbd5e1;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-current-week:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.nav-arrows {
  display: flex;
  gap: 6px;
}

.btn-arrow {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: #cbd5e1;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-arrow:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
  transform: scale(1.05);
}

/* 7-Day Horizontal Strip (ПН 7, ВТ 8, СР 9, ЧТ 10...) */
.week-strip-container {
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  margin-bottom: 1.5rem;
  padding-bottom: 4px;
}
.week-strip-container::-webkit-scrollbar {
  display: none;
}

.week-strip {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  min-width: 320px;
}

.day-strip-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 4px 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 18px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
}

.day-strip-chip:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

.day-strip-name {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #8892b0;
  margin-bottom: 4px;
}

.day-strip-num {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s;
}

.day-strip-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  margin-top: 4px;
}

/* Active Day (Solid Glowing Blue Circle as in screenshot: ЧТ 10) */
.day-strip-chip.active .day-strip-num {
  background: #2563eb;
  color: #ffffff;
  box-shadow: 0 0 16px rgba(37, 99, 235, 0.65);
}

.day-strip-chip.active {
  background: rgba(37, 99, 235, 0.12);
  border-color: rgba(37, 99, 235, 0.35);
}

.day-strip-chip.active .day-strip-name {
  color: #60a5fa;
}

.day-strip-chip.active .day-strip-dot {
  background: #60a5fa;
}

/* Week Time-Grid Matrix (Flat, Clean, Minimalist) */
.week-grid-view {
  width: 100%;
}

.grid-scroll-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: rgba(10, 14, 22, 0.65);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 12px;
  padding: 8px 4px 10px 4px;
  box-shadow: none;
}

.week-matrix {
  display: grid;
  grid-template-columns: 50px repeat(7, minmax(85px, 1fr));
  min-width: 680px;
  position: relative;
}

.matrix-col-header {
  text-align: center;
  padding: 8px 2px 10px 2px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  border-right: 1px solid rgba(255, 255, 255, 0.04);
}

.matrix-col-header:last-child {
  border-right: none;
}

.matrix-col-header .col-day-num {
  font-size: 0.95rem;
  font-weight: 800;
  color: #ffffff;
}

.matrix-col-header .col-day-name {
  font-size: 0.65rem;
  font-weight: 600;
  color: #8892b0;
  text-transform: uppercase;
  margin-top: 1px;
}

.matrix-col-header.active-day-col {
  background: rgba(37, 99, 235, 0.12);
}

.matrix-col-header.active-day-col .col-day-num {
  color: #60a5fa;
}

.matrix-time-col {
  display: flex;
  flex-direction: column;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}

.matrix-time-slot {
  height: 80px;
  font-size: 0.68rem;
  font-weight: 600;
  color: #64748b;
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  padding-right: 6px;
  padding-top: 0;
  font-family: var(--font-mono);
  box-sizing: border-box;
}

.matrix-day-col {
  position: relative;
  border-right: 1px solid rgba(255, 255, 255, 0.05);
  height: calc(80px * 11); /* 08:00 to 19:00 = 880px */
  box-sizing: border-box;
}

.matrix-day-col:last-child {
  border-right: none;
}

.matrix-grid-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.035);
  pointer-events: none;
}

/* Flat Minimal Lesson Card on Grid (no bulky 3D volume, no heavy drop-shadows) */
.matrix-lesson-card {
  position: absolute;
  border-radius: 6px;
  padding: 5px 6px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: stretch;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, filter 0.15s ease;
  overflow: hidden;
  z-index: 2;
  box-sizing: border-box;
  box-shadow: none;
  transform: none;
}

.matrix-lesson-card:hover {
  z-index: 10;
  transform: none;
  filter: brightness(1.15);
}

/* Practices / Labs: Subtle Clean Flat Emerald */
.matrix-lesson-card.type-practice,
.matrix-lesson-card.type-lab {
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.32);
}

.matrix-lesson-card.type-practice:hover,
.matrix-lesson-card.type-lab:hover {
  background: rgba(16, 185, 129, 0.22);
  border-color: rgba(52, 211, 153, 0.55);
}

/* Lectures: Subtle Clean Flat Amber / Gold */
.matrix-lesson-card.type-lecture {
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.32);
}

.matrix-lesson-card.type-lecture:hover {
  background: rgba(245, 158, 11, 0.22);
  border-color: rgba(245, 158, 11, 0.55);
}

/* Seminars / Other: Subtle Clean Flat Sapphire / Blue */
.matrix-lesson-card.type-seminar,
.matrix-lesson-card.type-other {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.32);
}

.matrix-lesson-card.type-seminar:hover,
.matrix-lesson-card.type-other:hover {
  background: rgba(59, 130, 246, 0.22);
  border-color: rgba(96, 165, 250, 0.55);
}

.matrix-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 2px;
  min-height: 12px;
}

.matrix-card-top-left {
  display: flex;
  align-items: center;
  gap: 3px;
  overflow: hidden;
}

.matrix-type-badge {
  font-size: 0.58rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 1px 5px;
  border-radius: 3px;
  letter-spacing: 0.02em;
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  white-space: nowrap;
  line-height: 1.2;
}

.matrix-type-badge.mini {
  font-size: 0.50rem;
  font-weight: 800;
  padding: 1px 3px;
  border-radius: 2px;
  letter-spacing: 0;
}

.matrix-pair-tag {
  font-size: 0.56rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.65);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.matrix-card-link-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #60a5fa;
  flex-shrink: 0;
  line-height: 1;
}

.matrix-card-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 1px 0;
  text-align: center;
  overflow: hidden;
  width: 100%;
}

.matrix-subject-abbr {
  font-size: 0.90rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.15;
  letter-spacing: 0.02em;
  text-align: center;
  word-break: break-word;
  text-shadow: none;
}

.matrix-lesson-card.is-subgroup .matrix-subject-abbr {
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.1;
}

.matrix-lesson-card.is-narrow .matrix-subject-abbr {
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.matrix-subgroup-tag {
  font-size: 0.58rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.78);
  margin-top: 1px;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.1;
}

.matrix-card-teacher {
  font-size: 0.64rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 2px;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
  line-height: 1.2;
}

.matrix-card-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding-top: 2px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.matrix-lesson-time {
  font-size: 0.64rem;
  font-weight: 600;
  font-family: var(--font-mono);
  opacity: 0.9;
  letter-spacing: -0.01em;
  white-space: nowrap;
  line-height: 1.1;
}

.matrix-lesson-card.is-subgroup .matrix-lesson-time {
  font-size: 0.58rem;
}

.matrix-lesson-card.type-practice .matrix-lesson-time,
.matrix-lesson-card.type-lab .matrix-lesson-time {
  color: #86efac;
}

.matrix-lesson-card.type-lecture .matrix-lesson-time {
  color: #fde047;
}

.matrix-lesson-card.type-seminar .matrix-lesson-time,
.matrix-lesson-card.type-other .matrix-lesson-time {
  color: #93c5fd;
}

/* Detailed Day View Cards */
.day-cards-view {
  width: 100%;
}

.day-cards-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 720px;
  margin: 0 auto;
}

/* Detail Modal */
.lesson-detail-card {
  max-width: 440px;
  background: rgba(14, 18, 28, 0.96);
  backdrop-filter: blur(35px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.8);
}

.modal-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 9999px;
  background: rgba(37, 99, 235, 0.2);
  border: 1px solid rgba(37, 99, 235, 0.4);
  color: #60a5fa;
}

.detail-time-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 12px 0 6px;
}

.detail-pair-num {
  font-size: 0.85rem;
  font-weight: 800;
  color: #94a3b8;
  text-transform: uppercase;
}

.detail-time-val {
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: #cbd5e1;
}

.detail-subject-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
  line-height: 1.3;
}

.detail-meta-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 20px;
}

.detail-meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: #cbd5e1;
}

.detail-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-join-lesson {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 13px;
  border-radius: 12px;
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.35);
  transition: all 0.2s;
}

.btn-join-lesson:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.5);
}

.edit-link-trigger {
  width: 100%;
  text-align: center;
}

/* ==========================================================================
   Day Cards View (Detailed Day List with Emerald / Bronze Glassmorphism)
   ========================================================================== */

.day-cards-view {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 16px;
}

.day-cards-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Base Lesson Card in Day View */
.lesson-card {
  display: flex;
  align-items: stretch;
  gap: 18px;
  padding: 18px 20px;
  border-radius: 18px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(18, 24, 38, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.2s;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.lesson-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
}

/* Time Column */
.lesson-time-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 95px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  flex-shrink: 0;
}

.pair-number {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 4px;
}

.time-range {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: #cbd5e1;
}

/* Info Column */
.lesson-info-col {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

.lesson-top-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.lesson-type-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.stream-badge {
  font-size: 0.72rem;
  font-weight: 600;
  color: #94a3b8;
  background: rgba(255, 255, 255, 0.05);
  padding: 3px 8px;
  border-radius: 6px;
  max-width: 320px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lesson-subject {
  font-size: 1.05rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.35;
}

.lesson-teacher {
  font-size: 0.88rem;
  color: #94a3b8;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Actions Column */
.lesson-action-col {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.join-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  border-radius: 12px;
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.35);
  transition: all 0.2s;
}

.join-link-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.5);
}

.custom-link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: #cbd5e1;
  cursor: pointer;
  transition: all 0.2s;
}

.custom-link-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.custom-link-btn.has-link {
  border-color: rgba(59, 130, 246, 0.5);
  color: #60a5fa;
  background: rgba(59, 130, 246, 0.15);
}

/* --- THEME 1: LECTURES (Bronze / Warm Amber Glass) --- */
.lesson-card.type-lecture {
  background: linear-gradient(135deg, rgba(68, 38, 24, 0.55), rgba(30, 18, 14, 0.75));
  border: 1px solid rgba(245, 158, 11, 0.35);
  box-shadow: 0 8px 24px rgba(180, 83, 9, 0.18);
}

.lesson-card.type-lecture:hover {
  border-color: rgba(245, 158, 11, 0.6);
  box-shadow: 0 12px 32px rgba(180, 83, 9, 0.3);
}

.lesson-card.type-lecture .lesson-time-col {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.25);
}

.lesson-card.type-lecture .pair-number {
  color: #fbbf24;
}

.lesson-card.type-lecture .time-range {
  color: #fef3c7;
}

.lesson-card.type-lecture .lesson-type-badge {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.4);
}

/* --- THEME 2: PRACTICES / LABS / SEMINARS (Emerald Glass) --- */
.lesson-card.type-practice,
.lesson-card.type-lab,
.lesson-card.type-seminar {
  background: linear-gradient(135deg, rgba(13, 56, 40, 0.55), rgba(8, 30, 22, 0.75));
  border: 1px solid rgba(52, 211, 153, 0.35);
  box-shadow: 0 8px 24px rgba(6, 95, 70, 0.18);
}

.lesson-card.type-practice:hover,
.lesson-card.type-lab:hover,
.lesson-card.type-seminar:hover {
  border-color: rgba(52, 211, 153, 0.6);
  box-shadow: 0 12px 32px rgba(6, 95, 70, 0.3);
}

.lesson-card.type-practice .lesson-time-col,
.lesson-card.type-lab .lesson-time-col,
.lesson-card.type-seminar .lesson-time-col {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(52, 211, 153, 0.25);
}

.lesson-card.type-practice .pair-number,
.lesson-card.type-lab .pair-number,
.lesson-card.type-seminar .pair-number {
  color: #34d399;
}

.lesson-card.type-practice .time-range,
.lesson-card.type-lab .time-range,
.lesson-card.type-seminar .time-range {
  color: #d1fae5;
}

.lesson-card.type-practice .lesson-type-badge,
.lesson-card.type-lab .lesson-type-badge,
.lesson-card.type-seminar .lesson-type-badge {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid rgba(52, 211, 153, 0.4);
}

/* --- THEME 3: OTHER / CONSULTATION --- */
.lesson-card.type-other {
  background: rgba(22, 30, 46, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.lesson-card.type-other .pair-number {
  color: #94a3b8;
}

.lesson-card.type-other .lesson-type-badge {
  background: rgba(255, 255, 255, 0.08);
  color: #cbd5e1;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

@media (max-width: 640px) {
  .lesson-card {
    flex-direction: column;
    gap: 12px;
  }
  .lesson-time-col {
    flex-direction: row;
    justify-content: space-between;
    width: 100%;
  }
  .lesson-action-col {
    width: 100%;
    justify-content: space-between;
  }
  .join-link-btn {
    flex: 1;
    justify-content: center;
  }
}

/* --- USER AUTHENTICATION & CABINET STYLES --- */
.user-profile-wrapper {
  position: relative;
  display: inline-flex;
}

.btn-auth-nav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(96, 165, 250, 0.3);
  color: #93c5fd;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-auth-nav:hover {
  background: rgba(59, 130, 246, 0.25);
  border-color: rgba(96, 165, 250, 0.5);
  transform: translateY(-1px);
  color: #fff;
}

.btn-auth-nav.is-logged-in {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(52, 211, 153, 0.35);
  color: #6ee7b7;
}

.btn-auth-nav.is-logged-in:hover {
  background: rgba(16, 185, 129, 0.25);
  color: #fff;
}

.user-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-surface-elevated, #161e2e);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.55);
  padding: 8px 0;
  min-width: 220px;
  z-index: 200;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  animation: scaleUp 0.15s ease-out;
}

.user-dropdown-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
}

.user-avatar-badge {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.2);
  border: 1px solid rgba(96, 165, 250, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.user-info-text {
  display: flex;
  flex-direction: column;
}

.user-username-display {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text-primary);
}

.user-group-badge {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.user-dropdown-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  margin: 6px 0;
}

.user-dropdown-item {
  width: 100%;
  background: transparent;
  border: none;
  padding: 10px 16px;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.user-dropdown-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}

.user-dropdown-item.user-dropdown-logout:hover {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

/* Auth Modal Specifics */
.auth-modal-card {
  max-width: 440px;
}

.auth-tabs {
  display: flex;
  gap: 6px;
  background: rgba(0, 0, 0, 0.25);
  padding: 4px;
  border-radius: var(--radius-md);
}

.auth-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.auth-tab-btn.active {
  background: var(--karazin-blue, #2563eb);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4);
}

.auth-benefit-hint {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: var(--radius-md);
  padding: 12px;
  margin-bottom: 18px;
  font-size: 0.84rem;
  color: #bfdbfe;
  line-height: 1.4;
}

.auth-error-msg {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fca5a5;
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-size: 0.85rem;
  margin-top: 14px;
}

.cloud-sync-status {
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  margin-top: 12px;
}

.cloud-sync-status.in-cloud {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  color: #6ee7b7;
}

.cloud-sync-status.in-guest {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.25);
  color: #fcd34d;
}

/* User Dropdown Enhancements */
.user-dropdown-item {
  justify-content: space-between;
}

.dropdown-item-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.dropdown-item-badge {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(96, 165, 250, 0.3);
}

/* Links Manager Modal */
.links-manager-card {
  max-width: 660px;
  width: 95%;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
}

.modal-header-title-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.links-total-count {
  font-size: 0.75rem;
  font-weight: 700;
  color: #93c5fd;
  background: rgba(59, 130, 246, 0.18);
  border: 1px solid rgba(59, 130, 246, 0.3);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.links-search-bar {
  margin-bottom: 14px;
}

.links-search-bar input {
  font-size: 0.88rem;
  padding: 8px 14px;
}

.links-manager-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 52vh;
  overflow-y: auto;
  padding-right: 4px;
}

.links-manager-list::-webkit-scrollbar {
  width: 5px;
}

.links-manager-list::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

.link-manager-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: all var(--transition-fast);
}

.link-manager-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(96, 165, 250, 0.35);
  transform: translateY(-1px);
}

.link-item-main {
  flex: 1;
  min-width: 0;
}

.link-item-subject {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.link-item-badges {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.badge-group {
  font-size: 0.72rem;
  font-weight: 700;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
}

.badge-type {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
}

.badge-type.type-lecture {
  color: #c084fc;
  background: rgba(192, 132, 252, 0.14);
  border: 1px solid rgba(192, 132, 252, 0.28);
}

.badge-type.type-practice {
  color: #34d399;
  background: rgba(52, 211, 153, 0.14);
  border: 1px solid rgba(52, 211, 153, 0.28);
}

.badge-type.type-general {
  color: #94a3b8;
  background: rgba(148, 163, 184, 0.12);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.badge-platform {
  font-size: 0.72rem;
  font-weight: 600;
  color: #fde047;
  background: rgba(253, 224, 71, 0.12);
  border: 1px solid rgba(253, 224, 71, 0.25);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.link-item-note {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.link-item-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.btn-action-test {
  background: rgba(37, 99, 235, 0.2);
  border: 1px solid rgba(59, 130, 246, 0.4);
  color: #93c5fd;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-action-test:hover {
  background: var(--karazin-blue, #2563eb);
  color: #fff;
}

.btn-action-icon {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-action-icon:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-primary);
}

.btn-action-delete:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.4);
  color: #f87171;
}

.links-empty-state {
  text-align: center;
  padding: 36px 16px;
}

.links-empty-state .empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.links-empty-state .empty-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.links-empty-state .empty-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 420px;
  margin: 0 auto;
  line-height: 1.5;
}

.links-cloud-sync-hint {
  font-size: 0.78rem;
  color: #6ee7b7;
}

/* Account Settings Modal */
.account-settings-card {
  max-width: 480px;
  width: 95%;
}

.settings-section {
  margin-bottom: 18px;
}

.settings-section-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
}

.settings-section-icon {
  font-size: 1.3rem;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.25);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.settings-section-title {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 3px;
}

.settings-section-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}

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

.form-group-inline input {
  flex: 1;
}

.form-group-inline button {
  white-space: nowrap;
  padding: 10px 18px;
}

.settings-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  margin: 20px 0;
}

.settings-feedback-msg {
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.82rem;
  margin-top: 10px;
  line-height: 1.4;
}

.settings-feedback-msg.success {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #6ee7b7;
}

.settings-feedback-msg.error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fca5a5;
}

/* ==========================================================================
   Elective & Subgroup Discipline Choices System (Профіль занять)
   ========================================================================== */

/* Subgroup Filter Trigger Button in Schedule Controls */
.btn-subgroup-filter {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #cbd5e1;
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.btn-subgroup-filter:hover {
  background: rgba(37, 99, 235, 0.18);
  border-color: rgba(59, 130, 246, 0.4);
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-subgroup-filter.has-active-choices {
  background: rgba(37, 99, 235, 0.15);
  border-color: rgba(59, 130, 246, 0.35);
  color: #93c5fd;
}

.subgroup-filter-badge {
  background: #2563eb;
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 9999px;
  font-family: var(--font-mono);
  box-shadow: 0 0 10px rgba(37, 99, 235, 0.5);
}

/* Modal: Discipline Choices Card */
.discipline-choice-card {
  max-width: 520px;
  width: 92%;
  background: rgba(14, 18, 28, 0.97);
  backdrop-filter: blur(35px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.85);
}

.discipline-modal-title-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.discipline-modal-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #60a5fa;
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(37, 99, 235, 0.3);
  padding: 3px 9px;
  border-radius: 9999px;
  align-self: flex-start;
}

.discipline-modal-title {
  font-size: 1.22rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.discipline-modal-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 12px 0 18px;
}

.discipline-splits-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-height: 380px;
  overflow-y: auto;
  padding-right: 4px;
}

.discipline-split-block {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 14px;
}

.split-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.split-block-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
}

.split-block-badge {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 8px;
  border-radius: 6px;
}

.split-options-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.discipline-opt-label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  cursor: pointer;
  transition: all 0.18s;
  user-select: none;
}

.discipline-opt-label:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.1);
}

.discipline-opt-label.selected {
  background: rgba(37, 99, 235, 0.14);
  border-color: rgba(59, 130, 246, 0.45);
  box-shadow: 0 0 12px rgba(37, 99, 235, 0.2);
}

.discipline-opt-radio {
  accent-color: #2563eb;
  width: 16px;
  height: 16px;
  cursor: pointer;
  flex-shrink: 0;
}

.discipline-opt-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  flex: 1;
  line-height: 1.3;
}

.discipline-opt-label.selected .discipline-opt-text {
  color: #ffffff;
}

/* Quick Choice Action inside Lesson Detail Modal */
.modal-choice-action {
  margin-top: 4px;
  margin-bottom: 14px;
}

.btn-select-as-my-choice {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px 16px;
  border-radius: 12px;
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: #93c5fd;
  font-family: var(--font-main);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-select-as-my-choice:hover {
  background: #2563eb;
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
}

.choice-active-indicator {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #6ee7b7;
  font-size: 0.84rem;
  font-weight: 600;
}

.choice-active-left {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-clear-choice {
  background: transparent;
  border: none;
  color: #fca5a5;
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: underline;
  cursor: pointer;
  padding: 2px 6px;
}

.btn-clear-choice:hover {
  color: #ef4444;
}