:root {
  --primary: #9f1239;
  --primary-hover: #881337;
  --primary-light: #fff1f2;
  --primary-border: #fecdd3;
  --accent: #0f766e;
  --accent-light: #ccfbf1;
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --text-main: #334155;
  --text-dark: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --success: #dcfce7;
  --success-border: #86efac;
  --danger: #fee2e2;
  --danger-border: #fca5a5;
  --warning: #fff7ed;
  --warning-border: #fed7aa;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.08);
  --radius: 14px;
  --max-w: 1100px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(180deg, #fff 0%, var(--bg-body) 320px);
  color: var(--text-main);
  line-height: 1.6;
}

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

header {
  background: var(--bg-surface);
  border-bottom: 2px solid var(--primary);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0.8rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius);
  padding: 6px;
}

.logo-text h1 {
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  color: var(--text-dark);
  line-height: 1.1;
}

.logo-text small {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.header-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.75rem;
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--primary-border);
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.85rem;
  white-space: nowrap;
}

main {
  max-width: var(--max-w);
  margin: 2rem auto 4rem;
  padding: 0 1.5rem;
}

.intro-section {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: clamp(1.2rem, 3vw, 2.2rem);
  margin-bottom: 1.5rem;
}

.intro-section h2 {
  margin: 0 0 0.5rem;
  color: var(--primary);
  font-size: clamp(1.5rem, 4vw, 2.3rem);
}

.intro-section p { max-width: 70ch; margin: 0.35rem 0; }

.badge {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border-radius: 0.35rem;
  margin-bottom: 0.75rem;
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.8rem;
}

#mode-buttons, #quiz-container, #result {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: clamp(1rem, 2vw, 1.5rem);
  margin: 1.25rem 0;
}

.door-btn, .back-btn, .quiz-btn, .hint-btn {
  border: 0;
  border-radius: 999px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.door-btn, .quiz-btn-primary {
  background: var(--primary);
  color: #fff;
  padding: 0.8rem 1.05rem;
  box-shadow: var(--shadow-sm);
}

.door-btn:hover, .quiz-btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.back-btn, .quiz-btn-secondary {
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--primary-border);
  padding: 0.72rem 1rem;
}

.back-btn {
  display: block;
  margin: 1rem auto 0;
}

.hint-btn {
  background: var(--warning);
  color: #9a3412;
  border: 1px solid var(--warning-border);
  padding: 0.48rem 0.75rem;
  margin-bottom: 0.75rem;
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

#timer {
  display: none;
  position: fixed;
  top: 78px;
  right: 16px;
  z-index: 60;
  background: var(--text-dark);
  color: #fff;
  padding: 0.65rem 0.9rem;
  border-radius: 999px;
  box-shadow: var(--shadow-md);
  font-weight: 800;
}

.exam-start-card {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.exam-start-card h2 { margin: 0.2rem 0 0.5rem; color: var(--text-dark); }

.exam-meta {
  position: sticky;
  top: 78px;
  z-index: 20;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.question {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
  background: #fff;
}

.question-title {
  margin: 0 0 0.75rem;
  color: var(--text-dark);
  font-weight: 800;
}

.options { display: grid; gap: 0.55rem; }

.option {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.55rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #f8fafc;
}

.option input { margin-top: 0.27rem; }
.option label { flex: 1; }
.option.correct { background: var(--success); border-color: var(--success-border); }
.option.incorrect { background: var(--danger); border-color: var(--danger-border); }
.question-correct { border-color: var(--success-border); }
.question-incorrect { border-color: var(--danger-border); }

.feedback {
  width: 100%;
  color: #991b1b;
  background: rgba(255,255,255,0.7);
  border-radius: 8px;
  padding: 0.35rem 0.5rem;
  font-size: 0.9rem;
  font-style: italic;
}

.hint-box {
  margin: 0 0 0.85rem;
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--warning-border);
  border-radius: var(--radius);
  background: var(--warning);
  color: #7c2d12;
}

.question-nav {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1rem;
}

.submit-btn { display: block; margin: 1.4rem auto 0; min-width: 180px; }

.success-message {
  background: var(--success);
  border: 1px solid var(--success-border);
  border-radius: var(--radius);
  padding: 0.85rem;
}

.fail-message {
  background: var(--danger);
  border: 1px solid var(--danger-border);
  border-radius: var(--radius);
  padding: 0.85rem;
}

.details-box {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  background: #f8fafc;
}

.error-detail {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.error-detail:last-child { border-bottom: 0; }

.media-rules-img {
  max-width: 100%;
  cursor: pointer;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.image-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.82);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  padding: 2rem;
}

.image-overlay img {
  max-width: 92%;
  max-height: 92%;
  border-radius: var(--radius);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.25);
  transition: transform 0.25s ease;
}

.image-overlay img.zoomed { transform: scale(1.7); }

footer {
  max-width: var(--max-w);
  margin: 2rem auto 0;
  padding: 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
}

footer p { margin: 0.35rem 0; }

.fade-in { animation: fadeIn 0.35s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

@media (max-width: 760px) {
  .header-inner { align-items: flex-start; padding: 0.75rem 1rem; }
  .header-pill { display: none; }
  main { margin-top: 1rem; padding: 0 0.85rem; }
  #timer { top: auto; right: 12px; bottom: 12px; }
  .exam-meta { top: 72px; }
  .mode-grid { grid-template-columns: 1fr; }
  .door-btn, .back-btn, .quiz-btn-primary { width: 100%; }
}


.version-stamp {
  display: inline-flex;
  align-items: center;
  margin-left: .45rem;
  padding: .18rem .55rem;
  border-radius: 999px;
  font-size: .62em;
  font-weight: 700;
  line-height: 1;
  background: rgba(255,255,255,.78);
  color: var(--color-primary, #28304f);
  border: 1px solid rgba(40,48,79,.16);
  vertical-align: middle;
}

/* Ergänzungen Medienführerschein 3.0 · Startseite & Lehrkräfte-Readme */
.info-section,
.student-guide,
.teacher-access,
.readme-section {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: clamp(1rem, 2.5vw, 1.6rem);
  margin: 1.25rem 0;
}

.section-heading h2,
.student-guide h2,
.teacher-access h2,
.readme-section h2 {
  margin: 0.25rem 0 0.4rem;
  color: var(--text-dark);
}

.section-heading p,
.teacher-access p {
  margin: 0.25rem 0 1rem;
  color: var(--text-muted);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.85rem;
}

.info-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #f8fafc;
  padding: 1rem;
}

.info-card h3 {
  margin: 0.35rem 0;
  color: var(--text-dark);
}

.info-card p { margin: 0.25rem 0; }

.info-icon {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--primary-border);
  font-weight: 800;
}

.inline-link-btn {
  margin-top: 0.65rem;
  border: 0;
  background: transparent;
  color: var(--primary);
  padding: 0;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  text-decoration: underline;
}

.guide-steps {
  margin: 0.75rem 0 0;
  padding-left: 1.4rem;
}

.guide-steps li { margin: 0.35rem 0; }

.teacher-access {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  gap: 1rem;
  align-items: center;
  background: linear-gradient(135deg, #ffffff 0%, #fff1f2 100%);
}

.teacher-form label {
  display: block;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 0.35rem;
}

.teacher-form-row {
  display: flex;
  gap: 0.55rem;
}

.teacher-form input {
  min-width: 0;
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.72rem 0.9rem;
  font: inherit;
}

.teacher-form small {
  display: block;
  margin-top: 0.4rem;
  color: var(--text-muted);
}

.certificate-dialog {
  width: min(920px, calc(100% - 2rem));
  border: 0;
  border-radius: var(--radius);
  padding: 0;
  box-shadow: var(--shadow-md);
}

.certificate-dialog::backdrop { background: rgba(15, 23, 42, 0.72); }

.dialog-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--border);
}

.dialog-head h2 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--text-dark);
}

.dialog-close {
  border: 0;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 999px;
  width: 2rem;
  height: 2rem;
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
}

.certificate-example { padding: 1rem; }
.certificate-example img {
  display: block;
  width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #f8fafc;
}
.certificate-example p { margin: 0.75rem 0 0; }

.readme-hero {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-left: 5px solid var(--primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: clamp(1.2rem, 3vw, 2rem);
  margin-bottom: 1.25rem;
}

.readme-hero h2 {
  margin: 0.25rem 0 0.4rem;
  color: var(--primary);
}

.patch-list {
  display: grid;
  gap: 0.65rem;
  padding-left: 1.2rem;
}

.patch-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0 1rem;
  font-size: 0.95rem;
}

.patch-table th,
.patch-table td {
  border: 1px solid var(--border);
  padding: 0.65rem 0.75rem;
  vertical-align: top;
  text-align: left;
}

.patch-table th {
  background: #f8fafc;
  color: var(--text-dark);
}

.locked-box {
  max-width: 560px;
  margin: 2rem auto;
}

@media (max-width: 760px) {
  .teacher-access { grid-template-columns: 1fr; }
  .teacher-form-row { flex-direction: column; }
  .teacher-form-row .quiz-btn { width: 100%; }
  .patch-table { display: block; overflow-x: auto; }
}

/* Startseite – komprimierte, sofort sichtbare Version */
.start-dashboard {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: 1rem;
  align-items: stretch;
  margin-bottom: 1rem;
}

.start-copy,
.test-selection {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: clamp(1.05rem, 2.5vw, 1.7rem);
}

.start-copy h2 {
  margin: 0 0 0.55rem;
  color: var(--primary);
  font-size: clamp(1.55rem, 3.2vw, 2.3rem);
  line-height: 1.08;
}

.lead {
  margin: 0;
  font-size: 1.03rem;
  max-width: 58ch;
}

.quick-rules {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  margin-top: 1rem;
}

.quick-rules div {
  border: 1px solid var(--primary-border);
  background: var(--primary-light);
  border-radius: 12px;
  padding: 0.72rem;
}

.quick-rules strong {
  display: block;
  color: var(--primary);
  font-size: 1.05rem;
  line-height: 1.1;
}

.quick-rules span {
  display: block;
  color: var(--text-muted);
  font-size: 0.86rem;
  margin-top: 0.18rem;
}

.test-selection#mode-buttons {
  margin: 0;
}

.selection-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
}

.selection-heading h3 {
  margin: 0;
  color: var(--text-dark);
  font-size: 1.25rem;
}

.selection-heading p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.test-selection .mode-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.test-selection .door-btn {
  border-radius: 14px;
  min-height: 58px;
  font-size: 1rem;
}

.door-btn-secondary {
  background: #f8fafc;
  color: var(--primary);
  border: 1px solid var(--primary-border);
  box-shadow: none;
}

.door-btn-secondary:hover {
  color: #fff;
  background: var(--primary);
}

.teacher-corner {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.25rem;
  min-width: 215px;
}

.teacher-corner label {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.teacher-corner-row {
  display: flex;
  gap: 0.35rem;
  width: 100%;
}

.teacher-corner input {
  min-width: 0;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.48rem 0.7rem;
  font: inherit;
  font-size: 0.9rem;
  background: #f8fafc;
}

.teacher-corner button {
  border: 0;
  border-radius: 999px;
  width: 2.25rem;
  flex: 0 0 2.25rem;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
  cursor: pointer;
}

.compact-guide {
  display: grid;
  grid-template-columns: minmax(180px, 0.35fr) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  margin-top: 1rem;
}

.compact-guide h2,
.compact-heading h2 {
  font-size: clamp(1.15rem, 2vw, 1.45rem);
}

.guide-steps-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.45rem 1rem;
  margin: 0;
}

.guide-steps-grid li {
  margin: 0;
}

.compact-info {
  margin-top: 1rem;
}

.compact-heading {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.8rem;
}

.compact-heading .badge {
  margin-bottom: 0;
  flex: 0 0 auto;
}

.compact-cards {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.compact-cards .info-card {
  padding: 0.85rem;
}

.compact-cards .info-card h3 {
  font-size: 1rem;
}

.compact-cards .info-card p {
  font-size: 0.93rem;
}

@media (max-width: 900px) {
  .start-dashboard,
  .compact-guide {
    grid-template-columns: 1fr;
  }

  .compact-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .header-inner {
    flex-direction: column;
  }

  .teacher-corner {
    align-items: stretch;
    width: 100%;
    min-width: 0;
  }

  .teacher-corner label {
    text-align: left;
  }

  .quick-rules,
  .test-selection .mode-grid,
  .guide-steps-grid,
  .compact-cards {
    grid-template-columns: 1fr;
  }

  .selection-heading,
  .compact-heading {
    align-items: flex-start;
    flex-direction: column;
  }
}

/* Fokussierter Testmodus: Während eines Tests werden Startseiteninhalte,
   Erklärbereiche, Footer und Lehrkräftezugang ausgeblendet. */
body.quiz-focus header,
body.quiz-focus footer,
body.quiz-focus .start-dashboard,
body.quiz-focus .student-guide,
body.quiz-focus .info-section,
body.quiz-focus .teacher-access {
  display: none !important;
}

body.quiz-focus main {
  max-width: 980px;
  padding-top: 1rem;
}

body.quiz-focus #quiz-container,
body.quiz-focus #result {
  margin-top: 1rem;
}

.result-actions {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Großes Lernhinweis-Popup nach nicht bestandenem Test */
.study-support-dialog {
  width: min(760px, calc(100vw - 2rem));
  border: 0;
  border-radius: 28px;
  padding: 0;
  background: transparent;
  color: var(--ink, #1f2937);
}

.study-support-dialog::backdrop {
  background: rgba(22, 27, 43, 0.58);
  backdrop-filter: blur(4px);
}

.study-support-card {
  position: relative;
  padding: clamp(1.3rem, 3vw, 2rem);
  border-radius: 28px;
  background: #fffbf0;
  box-shadow: 0 24px 70px rgba(22, 27, 43, 0.28);
  border: 1px solid rgba(22, 27, 43, 0.10);
}

.study-support-card h2 {
  margin: 0.35rem 0 0.6rem;
  font-size: clamp(1.9rem, 5vw, 3rem);
  line-height: 1.05;
}

.study-support-lead {
  font-size: clamp(1.25rem, 3vw, 1.7rem);
  margin: 0.5rem 0;
}

.study-support-card p {
  font-size: 1.05rem;
  line-height: 1.55;
}

.study-support-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1rem 0;
}

.study-support-steps div {
  background: rgba(228, 221, 244, 0.62);
  border-radius: 18px;
  padding: 0.85rem;
}

.study-support-steps strong {
  display: inline-flex;
  width: 2rem;
  height: 2rem;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: #ffffff;
  margin-bottom: 0.45rem;
}

.study-support-steps span {
  display: block;
  font-size: 0.96rem;
}

.study-support-research,
.study-support-ai,
.study-support-tip {
  border-left: 5px solid rgba(22, 27, 43, 0.22);
  background: rgba(255, 255, 255, 0.72);
  padding: 0.8rem 1rem;
  border-radius: 14px;
}

.study-support-tip {
  font-style: italic;
}

.study-support-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 1rem;
}

.study-support-close {
  position: absolute;
  top: 0.85rem;
  right: 0.95rem;
}

@media (max-width: 700px) {
  .study-support-steps {
    grid-template-columns: 1fr;
  }

  .study-support-actions {
    justify-content: stretch;
  }

  .study-support-actions .quiz-btn {
    width: 100%;
  }
}


/* Adaptiver Lernmodus – Ergänzungen 06/2026 */
.adaptive-mode-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem 0.8rem;
  margin: 0.85rem 0 1rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid rgba(22, 27, 43, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.72);
}

.adaptive-mode-card strong {
  font-size: 1.05rem;
}

.adaptive-mode-card span {
  color: var(--muted, #5f6675);
  font-size: 0.94rem;
}

.hint-definition,
.hint-deepening {
  margin-top: 0.7rem;
  padding: 0.75rem 0.85rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.72);
  border-left: 4px solid rgba(22, 27, 43, 0.22);
}

.hint-definition ul {
  margin: 0.45rem 0 0;
  padding-left: 1.25rem;
}

.hint-definition li + li {
  margin-top: 0.35rem;
}

.hint-deepening p:last-child,
.hint-definition ul:last-child {
  margin-bottom: 0;
}