/* Custom variables defining the UI design system */
:root {
  --font-sans: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Color Palette */
  --bg-main: #0a0c10;
  --bg-card: rgba(22, 26, 35, 0.7);
  --bg-input: #121620;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.15);
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  
  --primary-hsl: 245, 82%, 65%;
  --primary: hsl(var(--primary-hsl));
  --primary-hover: hsl(245, 82%, 70%);
  --primary-glow: rgba(99, 102, 241, 0.35);
  
  --secondary: #ec4899;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  --border-radius-sm: 8px;
  --border-radius-md: 14px;
  --border-radius-lg: 20px;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(236, 72, 153, 0.04) 0%, transparent 40%);
  background-attachment: fixed;
  overflow-x: hidden;
}

/* Base Layout */
header {
  backdrop-filter: blur(12px);
  background-color: rgba(10, 12, 16, 0.7);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 2rem;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  row-gap: 0.75rem;
}

.logo {
  font-weight: 800;
  font-size: 1.5rem;
  background: linear-gradient(135deg, #818cf8, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.logo-icon {
  background: linear-gradient(135deg, #818cf8, #ec4899);
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: inline-block;
}

.version-tag {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 0.1rem 0.5rem;
  -webkit-text-fill-color: initial;
}

main.container {
  max-width: 1400px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

/* Glassmorphic Card */
.card {
  background-color: var(--bg-card);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 2rem;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-glow), transparent);
  opacity: 0;
  transition: var(--transition-fast);
}

.card:hover::before {
  opacity: 1;
}

.card:hover {
  border-color: rgba(99, 102, 241, 0.2);
  box-shadow: 0 12px 40px 0 rgba(99, 102, 241, 0.08);
  transform: translateY(-2px);
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.25rem;
}

h2 {
  font-size: 1.75rem;
}

p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* Grid systems */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-cols-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

/* Interactive Form Elements */
label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-main);
}

input, select, textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--font-sans);
  color: var(--text-main);
  font-family: inherit;
  font-size: 1rem;
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--border-radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
  box-shadow: 0 4px 14px 0 var(--primary-glow);
}

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

.btn-secondary {
  background-color: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

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

.btn-danger:hover {
  opacity: 0.9;
}

/* Badges / Roles switcher */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.badge-admin { background-color: rgba(236, 72, 153, 0.15); color: var(--secondary); border: 1px solid rgba(236, 72, 153, 0.3); }
.badge-teacher { background-color: rgba(99, 102, 241, 0.15); color: #818cf8; border: 1px solid rgba(99, 102, 241, 0.3); }
.badge-student { background-color: rgba(16, 185, 129, 0.15); color: var(--success); border: 1px solid rgba(16, 185, 129, 0.3); }

/* Rollen-Switcher (fuer Personen mit mehreren Rollen) */
.role-switcher {
  background-color: rgba(18, 22, 32, 0.8);
  border: 1px solid var(--secondary);
  border-radius: var(--border-radius-sm);
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.role-switcher select {
  padding: 0.25rem 0.5rem;
  background-color: var(--bg-main);
  width: auto;
  border-color: var(--secondary);
  font-size: 0.85rem;
}

/* Mock Switcher Styles */
.mock-switcher {
  background-color: rgba(18, 22, 32, 0.8);
  border: 1px dashed var(--primary);
  border-radius: var(--border-radius-sm);
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mock-switcher select {
  padding: 0.25rem 0.5rem;
  background-color: var(--bg-main);
  width: auto;
  border-color: var(--primary-glow);
  font-size: 0.85rem;
}

/* Live updates & Animation indicators */
.live-pulse {
  width: 10px;
  height: 10px;
  background-color: var(--danger);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
  animation: pulse 1.6s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 8px rgba(239, 68, 68, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
  }
}

/* Gerenderte Fragentexte (Markdown + KaTeX) - der globale Reset oben nimmt
   Listen/Absaetzen ihren Abstand und Einzug, das wird hier gezielt zurueckgeholt. */
.markdown-body {
  color: inherit;
  line-height: 1.6;
}

.markdown-body > *:last-child {
  margin-bottom: 0 !important;
}

.markdown-body p {
  color: inherit;
  margin-bottom: 0.75em;
}

.markdown-body ul,
.markdown-body ol {
  margin-bottom: 0.75em;
  padding-left: 1.5em;
}

.markdown-body ul { list-style-type: disc; }
.markdown-body ol { list-style-type: decimal; }
.markdown-body li { margin-bottom: 0.25em; }

.markdown-body code {
  background-color: rgba(255, 255, 255, 0.08);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

.markdown-body pre {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 0.75em 1em;
  overflow-x: auto;
  margin-bottom: 0.75em;
}

.markdown-body pre code {
  background: none;
  padding: 0;
}

.markdown-body blockquote {
  border-left: 3px solid var(--primary);
  padding-left: 1em;
  color: var(--text-muted);
  margin-bottom: 0.75em;
}

.markdown-body table {
  margin-top: 0;
  margin-bottom: 0.75em;
}

.markdown-body strong { color: var(--text-main); }

.markdown-body .katex-display {
  margin: 0.75em 0;
  overflow-x: auto;
  overflow-y: hidden;
}

/* Tables and Data lists */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.5rem;
}

/* Tabellen sind oft breiter als schmale Bildschirme (viele Spalten wie
   Titel/Fach/Klasse/Dauer/Fragen/Status/Aktionen). Die umschliessende .card
   hat overflow:hidden (wegen border-radius/::before-Leiste), ohne diesen
   Wrapper waeren rechte Spalten (z.B. der "Starten"-Button) auf Mobile
   unerreichbar abgeschnitten statt scrollbar zu sein. */
.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  font-weight: 600;
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.02);
}

tr:hover td {
  background-color: rgba(255, 255, 255, 0.01);
}

/* Exam interface details */
.matching-container {
  display: flex;
  gap: 2rem;
  margin: 1.5rem 0;
}

.matching-column {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.matching-item {
  padding: 1rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  user-select: none;
  transition: var(--transition-fast);
}

.matching-item.selected {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-glow);
}

.cloze-blank {
  display: inline-block;
  width: 140px;
  padding: 0.2rem 0.5rem;
  margin: 0 0.3rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: white;
  vertical-align: middle;
}

.cloze-blank:focus {
  outline: none;
  border-color: var(--primary);
}

.warning-banner {
  background-color: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: var(--warning);
  padding: 1rem;
  border-radius: var(--border-radius-sm);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Collapsible pools styles */
.pool-header-hover:hover {
  background-color: rgba(255, 255, 255, 0.03);
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.tab-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.85rem 1.25rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: var(--transition-fast);
  margin-bottom: -1px;
}

.tab-button:hover {
  color: var(--text-main);
}

.tab-button.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}