/* ============================================
   Quiz-Lernsystem – CSS-Grundgerüst
   Dark/Light Mode mit CSS Custom Properties
   ============================================ */

/* --- Light Mode (Default) --- */
:root {
  /* Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-card: #ffffff;
  --bg-header: #f8f9fa;
  --bg-input: #ffffff;
  --bg-hover: #e9ecef;

  /* Text */
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-muted: #adb5bd;

  /* Borders */
  --border-color: #dee2e6;
  --border-radius: 8px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

  /* Accent / Buttons */
  --color-primary: #4361ee;
  --color-primary-hover: #3a56d4;
  --color-primary-text: #ffffff;
  --color-secondary: #6c757d;
  --color-secondary-hover: #5a6268;
  --color-secondary-text: #ffffff;
  --color-danger: #dc3545;
  --color-danger-hover: #c82333;
  --color-danger-text: #ffffff;

  /* Correct / Incorrect */
  --color-correct-bg: #d4edda;
  --color-correct-border: #28a745;
  --color-correct-text: #155724;
  --color-incorrect-bg: #f8d7da;
  --color-incorrect-border: #dc3545;
  --color-incorrect-text: #721c24;

  /* Progress bar */
  --progress-bg: #e9ecef;
  --progress-fill: #4361ee;

  /* Modal overlay */
  --overlay-bg: rgba(0, 0, 0, 0.5);

  /* Transitions */
  --transition-speed: 0.25s;
}

/* --- Dark Mode --- */
[data-theme="dark"] {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-card: #1f2940;
  --bg-header: #0f1626;
  --bg-input: #16213e;
  --bg-hover: #2a3a5c;

  --text-primary: #e0e0e0;
  --text-secondary: #a0aec0;
  --text-muted: #636e7b;

  --border-color: #2d3748;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);

  --color-primary: #5a7cf7;
  --color-primary-hover: #7b9aff;
  --color-secondary: #8892a0;
  --color-secondary-hover: #a0a8b4;
  --color-danger: #e55b6a;
  --color-danger-hover: #f07080;

  --color-correct-bg: #1b3a2a;
  --color-correct-border: #38b249;
  --color-correct-text: #7ee89a;
  --color-incorrect-bg: #3a1b1b;
  --color-incorrect-border: #e55b6a;
  --color-incorrect-text: #f5a0a8;

  --progress-bg: #2d3748;
  --progress-fill: #5a7cf7;

  --overlay-bg: rgba(0, 0, 0, 0.7);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-speed) ease,
              color var(--transition-speed) ease;
  min-height: 100vh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* --- Layout --- */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1rem;
}

.container.container-wide {
  max-width: 1200px;
}

/* --- Admin Table --- */
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.admin-table th,
.admin-table td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}
.admin-table th {
  font-weight: 600;
  white-space: nowrap;
}
.admin-table td:last-child {
  white-space: nowrap;
}

/* --- Header --- */
.app-header {
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color var(--transition-speed) ease,
              border-color var(--transition-speed) ease;
}

.app-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.app-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.app-title a {
  color: inherit;
  text-decoration: none;
}

/* --- Header Navigation --- */
.header-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.header-nav a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.header-nav a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* --- Theme Toggle --- */
.theme-toggle {
  background: none;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: background-color var(--transition-speed) ease,
              border-color var(--transition-speed) ease,
              color var(--transition-speed) ease;
}

.theme-toggle:hover {
  background-color: var(--bg-hover);
}

.theme-toggle .icon {
  font-size: 1.1rem;
}

/* --- Main Content --- */
.main-content {
  padding: 1.5rem 0 3rem;
}

/* --- Cards --- */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: background-color var(--transition-speed) ease,
              border-color var(--transition-speed) ease,
              box-shadow var(--transition-speed) ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

/* --- Question Display --- */
.question-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  padding: 2rem;
  margin-bottom: 1.5rem;
  transition: background-color var(--transition-speed) ease,
              border-color var(--transition-speed) ease;
}

.question-number {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.question-text {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

.question-hint {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 1rem;
}

/* --- Answer Options --- */
.options-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.option-item:hover {
  background-color: var(--bg-hover);
}

.option-item.selected {
  border-color: var(--color-primary);
  background-color: var(--bg-hover);
}

.option-item input[type="radio"],
.option-item input[type="checkbox"] {
  margin-top: 0.25rem;
  accent-color: var(--color-primary);
  width: 1.1rem;
  height: 1.1rem;
  flex-shrink: 0;
}

.option-text {
  flex: 1;
  line-height: 1.5;
}

/* --- Correct / Incorrect Highlighting --- */
.option-item.correct,
.correct {
  background-color: var(--color-correct-bg);
  border-color: var(--color-correct-border);
  color: var(--color-correct-text);
}

.option-item.incorrect,
.incorrect {
  background-color: var(--color-incorrect-bg);
  border-color: var(--color-incorrect-border);
  color: var(--color-incorrect-text);
}

.option-item.correct:hover {
  background-color: var(--color-correct-bg);
}

.option-item.incorrect:hover {
  background-color: var(--color-incorrect-bg);
}

/* --- Explanations --- */
.explanation {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.75rem;
  background-color: var(--bg-secondary);
  border-radius: calc(var(--border-radius) / 2);
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  transition: background-color var(--transition-speed) ease;
}

.explanation-overall {
  margin-top: 0.75rem;
  padding: 1.25rem;
  background-color: var(--bg-secondary);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  font-size: 0.9rem;
  line-height: 1.8;
  white-space: pre-line;
  max-height: 500px;
  overflow-y: auto;
  transition: background-color var(--transition-speed) ease,
              border-color var(--transition-speed) ease;
}

.explanation-overall.collapsed {
  display: none;
}

/* --- Code Blocks in Fragen --- */
.question-text pre,
.explanation-overall pre,
.explanation pre {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: calc(var(--border-radius) / 2);
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
}

.question-text code,
.explanation-overall code,
.explanation code {
  font-family: 'Fira Code', 'Consolas', 'Monaco', 'Courier New', monospace;
  color: var(--text-primary);
}

/* --- Navigation + Toggle Row --- */
.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

/* --- Offene Sitzungen --- */
.offene-sitzungen-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
}
.offene-sitzung-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
}
.offene-sitzung-item:last-child {
  border-bottom: none;
}

/* --- Option Layout: Antwort oben, Erklärung darunter --- */
.option-item {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color var(--transition-speed) ease,
              border-color var(--transition-speed) ease;
}

.option-item .explanation {
  flex-basis: 100%;
}

/* --- Markier-Button (Lernmodus) --- */
.mark-btn {
  background: none;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  flex-shrink: 0;
  margin-left: auto;
}

.mark-btn:hover {
  border-color: var(--color-danger);
  color: var(--color-danger);
}

.mark-btn.marked {
  background-color: var(--color-incorrect-bg);
  border-color: var(--color-incorrect-border);
  color: var(--color-incorrect-text);
}

/* --- Matching Questions --- */
.matching-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.matching-pair {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--bg-card);
  transition: background-color var(--transition-speed) ease,
              border-color var(--transition-speed) ease;
}

.matching-pair.correct {
  background-color: var(--color-correct-bg);
  border-color: var(--color-correct-border);
}

.matching-pair.incorrect {
  background-color: var(--color-incorrect-bg);
  border-color: var(--color-incorrect-border);
}

.matching-label {
  flex: 1;
  font-size: 0.95rem;
  color: var(--text-primary);
  min-width: 0;
  word-wrap: break-word;
}

.matching-select {
  flex: 0 0 auto;
  min-width: 200px;
  max-width: 300px;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--bg-input);
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color 0.2s ease, background-color var(--transition-speed) ease;
}

.matching-select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.matching-select:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.matching-answer {
  flex: 0 0 auto;
  padding: 0.4rem 0.75rem;
  font-size: 0.9rem;
  background-color: var(--color-correct-bg);
  border: 1px solid var(--color-correct-border);
  border-radius: var(--border-radius);
  color: var(--color-correct-text);
}

.matching-pair.incorrect .matching-answer {
  background-color: var(--color-incorrect-bg);
  border-color: var(--color-incorrect-border);
  color: var(--color-incorrect-text, var(--text-primary));
}

.matching-correct-answer {
  flex-basis: 100%;
  margin-top: 0.5rem;
  padding: 0.3rem 0.6rem;
  font-size: 0.85rem;
  color: var(--color-correct-text);
  background-color: var(--color-correct-bg);
  border-radius: 4px;
}

@media (max-width: 600px) {
  .matching-pair {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .matching-select {
    min-width: 100%;
    max-width: 100%;
  }
}

.topic-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  transition: background-color var(--transition-speed) ease,
              border-color var(--transition-speed) ease;
}

/* --- Progress Bar --- */
.progress-bar-container {
  margin-bottom: 1.5rem;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--progress-bg);
  border-radius: 4px;
  overflow: hidden;
  transition: background-color var(--transition-speed) ease;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--progress-fill);
  border-radius: 4px;
  transition: width 0.4s ease, background-color var(--transition-speed) ease;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 500;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.1s ease;
  line-height: 1.4;
}

.btn:hover {
  transform: translateY(-1px);
}

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

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

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
}

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

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-secondary-hover);
}

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

.btn-danger:hover:not(:disabled) {
  background-color: var(--color-danger-hover);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--bg-hover);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 0.8rem 1.75rem;
  font-size: 1.05rem;
}

.btn-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* --- Forms & Inputs --- */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-size: 0.95rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--bg-input);
  color: var(--text-primary);
  transition: border-color 0.2s ease, background-color var(--transition-speed) ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

/* --- Checkbox / Radio custom list (filter, mode selection) --- */
.check-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.check-list label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.check-list label:hover {
  background-color: var(--bg-hover);
}

.check-list input[type="checkbox"],
.check-list input[type="radio"] {
  accent-color: var(--color-primary);
  width: 1rem;
  height: 1rem;
}

/* --- Mode Selection Cards --- */
.mode-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.mode-card {
  padding: 1.25rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  text-align: center;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.mode-card:hover {
  border-color: var(--color-primary);
  background-color: var(--bg-hover);
}

.mode-card.active {
  border-color: var(--color-primary);
  background-color: var(--bg-hover);
}

.mode-card-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.mode-card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* --- Modal / Dialog --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background-color: var(--bg-card);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  padding: 1.5rem;
  width: 90%;
  max-width: 450px;
  transform: scale(0.95);
  transition: transform 0.2s ease, background-color var(--transition-speed) ease;
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.modal-body {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.modal-body .check-list {
  max-height: 350px;
  overflow-y: auto;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* --- Katalog List --- */
.katalog-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.katalog-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-speed) ease,
              border-color var(--transition-speed) ease;
}

.katalog-item:hover {
  box-shadow: var(--shadow-md);
}

.katalog-info {
  flex: 1;
}

.katalog-name {
  font-weight: 600;
  font-size: 1rem;
}

.katalog-meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.15rem;
}

.katalog-actions {
  display: flex;
  gap: 0.4rem;
}

/* --- Result Summary --- */
.result-summary {
  text-align: center;
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.result-score {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-primary);
}

.result-details {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.result-pass {
  color: var(--color-correct-border);
}

.result-fail {
  color: var(--color-danger);
}

/* --- Alerts / Messages --- */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  font-size: 0.9rem;
  line-height: 1.5;
}

.alert-info {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.alert-success {
  background-color: var(--color-correct-bg);
  border: 1px solid var(--color-correct-border);
  color: var(--color-correct-text);
}

.alert-error {
  background-color: var(--color-incorrect-bg);
  border: 1px solid var(--color-incorrect-border);
  color: var(--color-incorrect-text);
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 0.75rem;
}

.empty-state-text {
  font-size: 1rem;
}

/* --- Loading Spinner --- */
.spinner {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: 3px solid var(--border-color);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Responsive --- */
@media (max-width: 600px) {
  .container {
    padding: 0 0.75rem;
  }

  .app-header .container {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .header-nav {
    order: 3;
    width: 100%;
    justify-content: center;
    gap: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-color);
  }

  .question-card {
    padding: 1.25rem;
  }

  .katalog-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .katalog-actions {
    width: 100%;
  }

  .katalog-actions .btn {
    flex: 1;
  }

  .mode-cards {
    grid-template-columns: 1fr;
  }

  .btn-group {
    flex-direction: column;
  }

  .btn-group .btn {
    width: 100%;
  }

  .modal {
    width: 95%;
    padding: 1.25rem;
  }

  .result-score {
    font-size: 2.25rem;
  }
}

/* --- Admin Collapsible Sections --- */
.admin-section {
  margin-top: 1rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: background-color var(--transition-speed) ease,
              border-color var(--transition-speed) ease;
}

.admin-section-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  cursor: pointer;
  user-select: none;
  transition: background-color var(--transition-speed) ease;
}

.admin-section-header:hover {
  background-color: var(--bg-hover);
}

.admin-section-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
}

.section-chevron {
  display: inline-block;
  font-size: 0.75rem;
  transition: transform 0.25s ease;
}

.admin-section.collapsed .section-chevron {
  transform: rotate(-90deg);
}

.admin-section-content {
  padding: 0 1rem 1rem;
}

.admin-section.collapsed .admin-section-content {
  display: none;
}

/* --- Exam Fetcher --- */
.exam-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.exam-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
  gap: 0.75rem;
}
.exam-item:last-child {
  border-bottom: none;
}
.exam-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.provider-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.provider-aws { background: #ff9900; color: #1a1a1a; }
.provider-gcp { background: #4285f4; color: #fff; }
.provider-azure { background: #0078d4; color: #fff; }
.provider-scrum { background: #009c8d; color: #fff; }
.provider-itil { background: #6b3fa0; color: #fff; }
.provider-prince2 { background: #e63946; color: #fff; }
.vorschau-frage {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}
.vorschau-frage:last-child {
  border-bottom: none;
  margin-bottom: 0;
}


/* --- Question Editor: Autocomplete & Validation --- */
.autocomplete-list {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  box-shadow: var(--shadow-md);
  max-height: 200px;
  overflow-y: auto;
  z-index: 50;
  display: none;
}

.autocomplete-item {
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background-color 0.15s ease;
}

.autocomplete-item:hover {
  background-color: var(--bg-hover);
}

.field-error {
  display: block;
  color: var(--color-danger);
  font-size: 0.8rem;
  margin-top: 0.25rem;
  min-height: 0;
}

.option-editor-row .form-input {
  font-size: 0.9rem;
}

/* --- Question Editor: Type Badges --- */
.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-sc {
  background-color: #e3f2fd;
  color: #1565c0;
}

.badge-mc {
  background-color: #f3e5f5;
  color: #7b1fa2;
}

.badge-match {
  background-color: #e8f5e9;
  color: #2e7d32;
}

[data-theme="dark"] .badge-sc {
  background-color: #1a3a5c;
  color: #90caf9;
}

[data-theme="dark"] .badge-mc {
  background-color: #3a1a4c;
  color: #ce93d8;
}

[data-theme="dark"] .badge-match {
  background-color: #1a3a2a;
  color: #a5d6a7;
}

.btn-active {
  background-color: var(--color-primary);
  color: var(--color-primary-text);
  border-color: var(--color-primary);
}

/* ===== Lerninhalte-Modul ===== */

/* Glossar-Begriffe: gestrichelte Unterstreichung */
.glossar-begriff {
    border-bottom: 1px dashed var(--accent, #6ee7b7);
    cursor: pointer;
    padding-bottom: 1px;
    transition: border-color 0.2s;
}

.glossar-begriff:hover,
.glossar-begriff:focus {
    border-bottom-color: var(--link, #82b1ff);
    outline: none;
}

/* Glossar-Popup */
.glossar-popup {
    position: absolute;
    background: var(--panel, #121a2b);
    border: 1px solid var(--line, #2a3854);
    border-radius: 12px;
    padding: 12px 16px;
    max-width: 350px;
    font-size: 0.9rem;
    color: var(--text, #e8edf7);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    line-height: 1.5;
    animation: glossar-fadein 0.15s ease-out;
}

@keyframes glossar-fadein {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Sprachumschaltung-Button */
.sprache-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border: 1px solid var(--line, #2a3854);
    border-radius: 8px;
    background: var(--panel2, #182235);
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text, #e8edf7);
    transition: border-color 0.2s;
}

.sprache-toggle:hover {
    border-color: var(--accent, #6ee7b7);
}

/* Lerninhalte Section-Content */
.lerninhalte-content h2 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.lerninhalte-content h3 {
    margin-top: 1.2rem;
    margin-bottom: 0.5rem;
}

.lerninhalte-content ul,
.lerninhalte-content ol {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.lerninhalte-content li {
    margin-bottom: 0.4rem;
    line-height: 1.6;
}

/* Lerninhalte Navigation */
.lerninhalte-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--line, #2a3854);
}

.lerninhalte-nav a {
    padding: 8px 14px;
    border: 1px solid var(--line, #2a3854);
    border-radius: 8px;
    background: var(--panel2, #182235);
    transition: border-color 0.2s;
}

.lerninhalte-nav a:hover {
    border-color: var(--accent, #6ee7b7);
    text-decoration: none;
}

/* Sections-Übersicht */
.sections-list {
    list-style: none;
    padding: 0;
}

.sections-list li {
    margin-bottom: 0.5rem;
}

.sections-list a {
    display: block;
    padding: 12px 16px;
    border: 1px solid var(--line, #2a3854);
    border-radius: 10px;
    background: var(--panel, #121a2b);
    transition: border-color 0.2s, background 0.2s;
}

.sections-list a:hover {
    border-color: var(--accent, #6ee7b7);
    background: var(--panel2, #182235);
    text-decoration: none;
}

/* Responsive */
@media (max-width: 600px) {
    .glossar-popup {
        max-width: calc(100vw - 32px);
        left: 16px !important;
        right: 16px;
    }
}