/* ==========================================================
   Lernplattform – gemeinsames Stylesheet
   Einfaches, modernes Design, mobil-freundlich
   ========================================================== */

:root {
  --color-bg: #f5f7fb;
  --color-surface: #ffffff;
  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-text: #1f2430;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-success: #16a34a;
  --color-danger: #dc2626;
  --color-warning: #d97706;
  --color-info: #2563eb;
  --color-ai: #7c3aed;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 6px 20px rgba(0, 0, 0, 0.05);
  /* Bewusst nur Schriften, die auf dem Gerät vorhanden sind: Würde die
     Schrift von Google Fonts nachgeladen, ginge bei jedem Seitenaufruf
     die IP-Adresse der Besucher:innen an Google - dazu gibt es in
     Deutschland bereits ein Urteil (LG München I, 20.01.2022,
     Az. 3 O 17493/20). "Inter" bleibt in der Liste, falls die Schrift
     lokal installiert ist; sonst greift die Systemschrift. */
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  /* Verhindert, dass Browser/Betriebssystem im Dunkelmodus eigene
     (unpassende) Farben für Formularfelder erzwingen – dadurch konnte
     Text beim Tippen unsichtbar werden. */
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

/* Sicherheitsnetz: jedes Formularfeld bekommt IMMER Text- und
   Hintergrundfarbe von uns, auch wenn es (wie z. B. die Antwortfelder)
   nicht extra mit .field gestylt wird. */
input,
textarea,
select {
  color: var(--color-text);
  background-color: var(--color-surface);
  font-family: var(--font);
}

html, body {
  margin: 0;
  padding: 0;
}

/* Seite als Spalte: So sitzt die Fußzeile immer unten, auch wenn der
   Inhalt kurz ist - ohne dass sie in jede einzelne Seitenstruktur
   eingebaut werden muss. */
body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
}

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

/* ---------- Layout ---------- */

.page {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.topbar .brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
}

.topbar .brand span {
  color: var(--color-primary);
}

.topbar-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.main-content {
  flex: 1;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

/* ---------- Startseite / Landingpage ---------- */

.landing-wrapper {
  flex: 1;
  min-height: 0;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
  justify-items: center;
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 24px;
}

@media (min-width: 860px) {
  .landing-wrapper {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }
}

.landing-hero {
  max-width: 480px;
  text-align: center;
}

@media (min-width: 860px) {
  .landing-hero {
    text-align: left;
  }
}

.landing-hero .brand {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 18px;
}

.landing-hero .brand span {
  color: var(--color-primary);
}

.landing-hero h1 {
  font-size: 1.9rem;
  line-height: 1.25;
  margin: 0 0 12px;
}

.landing-lead {
  color: var(--color-text-muted);
  margin: 0 0 28px;
  font-size: 1rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 520px) {
  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
  text-align: left;
}

.feature-icon {
  font-size: 1.4rem;
  line-height: 1.2;
}

.feature-item h3 {
  margin: 0 0 4px;
  font-size: 0.9rem;
}

.feature-item p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.auth-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px 36px;
  width: 100%;
  max-width: 400px;
}

.auth-card h1 {
  font-size: 1.5rem;
  margin: 0 0 4px;
  text-align: center;
}

.auth-card .subtitle {
  text-align: center;
  color: var(--color-text-muted);
  margin: 0 0 28px;
  font-size: 0.95rem;
}

.tabs {
  display: flex;
  border-radius: 999px;
  background: var(--color-bg);
  padding: 4px;
  margin-bottom: 24px;
}

.tabs button {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px 0;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.tabs button.active {
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow);
}

/* ---------- Formulare ---------- */

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: var(--font);
  background: var(--color-surface);
  color: var(--color-text);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.field textarea {
  resize: vertical;
  min-height: 70px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 8px;
  border: none;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s;
}

.btn:active {
  transform: scale(0.98);
}

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

/* Login/Registrieren-Buttons sollen die volle Breite der schmalen
   Auth-Karte einnehmen - anderswo (Kopfzeilen, Modals, Klassen-Kacheln)
   sollen Buttons sich an ihren Text anpassen, damit sie neben anderen
   Buttons einheitlich aussehen. */
.auth-card .btn-primary {
  width: 100%;
}

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

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

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

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

.btn-icon {
  width: 100%;
  margin-top: 4px;
}

.form-message {
  min-height: 20px;
  font-size: 0.85rem;
  margin-top: 12px;
  text-align: center;
}

.form-message.error {
  color: var(--color-danger);
}

.form-message.success {
  color: var(--color-success);
}

/* ---------- Kategorien ---------- */

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.section-header h1 {
  font-size: 1.4rem;
  margin: 0;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.category-card {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s;
  border: 1px solid transparent;
}

.category-card .delete-category,
.category-card .delete-topic {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 0.95rem;
}

/* Sammelbehälter für Bearbeiten + Löschen an einer Karte. Sobald zwei
   Symbole nebeneinander stehen, übernimmt dieser Container die
   Positionierung (die Einzelregel oben gilt weiterhin für Karten mit
   nur einem Symbol, z. B. auf der Klassen-Seite). */
.category-card .card-actions {
  position: absolute;
  top: 10px;
  right: 10px;
  display: flex;
  gap: 2px;
}

.category-card .card-actions .icon-btn {
  position: static;
  font-size: 0.95rem;
  padding: 2px 6px;
}

.category-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary);
}

.category-card h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}

.category-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.category-card .count {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(79, 70, 229, 0.1);
  padding: 3px 10px;
  border-radius: 999px;
}

.badge {
  display: inline-block;
  margin-bottom: 8px;
  margin-right: 24px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 3px 9px;
  border-radius: 999px;
}

.badge-private {
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
}

.badge-class {
  color: var(--color-primary);
  background: rgba(79, 70, 229, 0.12);
}

/* ---------- Ankündigungen ---------- */

.announcements-columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

@media (min-width: 720px) {
  .announcements-columns {
    grid-template-columns: 1fr 1fr;
  }
}

.announcements-column-title {
  font-size: 1rem;
  margin: 0 0 14px;
  color: var(--color-text-muted);
}

.empty-state-inline {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  padding: 16px 0;
}

.announcement-card {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  margin-bottom: 14px;
}

.announcement-card .delete-announcement {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 0.95rem;
}

.announcement-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding-right: 26px;
  margin-bottom: 8px;
}

.announcement-title {
  margin: 0;
  font-size: 1.05rem;
}

.announcement-date-badge {
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 700;
  white-space: nowrap;
  padding: 4px 10px;
  border-radius: 999px;
}

.announcement-date-badge.due-green {
  background: rgba(22, 163, 74, 0.12);
  color: var(--color-success);
}

.announcement-date-badge.due-orange {
  background: rgba(217, 119, 6, 0.12);
  color: var(--color-warning);
}

.announcement-date-badge.due-red {
  background: rgba(220, 38, 38, 0.12);
  color: var(--color-danger);
}

.announcement-type-badge {
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 700;
  white-space: nowrap;
  padding: 4px 10px;
  border-radius: 999px;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
}

.type-toggle {
  display: flex;
  gap: 16px;
  font-size: 0.9rem;
}

.type-toggle label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 400;
  cursor: pointer;
}

.announcement-content {
  margin: 0 0 10px;
  color: var(--color-text);
  font-size: 0.9rem;
  white-space: pre-wrap;
}

.announcement-meta {
  margin: 0;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ---------- Klassen ---------- */

.join-class-box {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 24px;
}

.join-class-box label {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.join-code-row {
  display: flex;
  gap: 10px;
}

.join-code-row input {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.95rem;
  text-transform: uppercase;
}

.join-code-row input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.join-code-inline {
  margin-top: 8px !important;
  font-size: 0.85rem !important;
}

.join-code-display {
  text-align: center;
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 4px;
  background: var(--color-bg);
  border-radius: 8px;
  padding: 16px;
  margin: 8px 0 0;
  color: var(--color-primary);
}

@media (max-width: 480px) {
  .join-code-row {
    flex-direction: column;
  }
}

.class-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.class-card-actions .btn {
  flex: 1;
  min-width: 100px;
  padding: 8px 10px;
  font-size: 0.8rem;
}

/* ---------- Klassen-Chat ---------- */

.chat-main {
  max-width: 720px;
}

.chat-box {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  height: min(560px, 70vh);
  overflow: hidden;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-empty {
  text-align: center;
  margin: auto 0;
}

.chat-bubble {
  align-self: flex-start;
  max-width: 75%;
  background: var(--color-bg);
  border-radius: 12px;
  padding: 8px 14px;
}

.chat-bubble.own {
  align-self: flex-end;
  background: rgba(79, 70, 229, 0.12);
}

.chat-meta {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 3px;
}

.chat-text {
  font-size: 0.95rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.chat-input-row {
  display: flex;
  gap: 10px;
  padding: 14px;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.chat-input-row input {
  flex: 1;
  min-width: 0;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.95rem;
}

.chat-input-row input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.chat-input-row .btn {
  width: auto;
  border-radius: 999px;
  padding: 10px 22px;
}

/* ---------- Fach-Fragen-Chat (Rollen statt "eigene/fremde Nachricht") ---------- */

.fach-chat-bubble.role-lehrer {
  background: rgba(22, 163, 74, 0.14);
}

.fach-chat-bubble.role-schueler {
  background: rgba(37, 99, 235, 0.12);
}

.role-badge {
  display: inline-block;
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  padding: 1px 7px;
  border-radius: 999px;
  margin-left: 6px;
  vertical-align: middle;
}

.role-badge.role-lehrer {
  background: rgba(22, 163, 74, 0.18);
  color: var(--color-success);
}

.role-badge.role-schueler {
  background: rgba(37, 99, 235, 0.16);
  color: var(--color-info);
}

.fach-picker-hint {
  margin: -8px 0 20px;
  font-size: 0.85rem;
}

.empty-state {
  text-align: center;
  color: var(--color-text-muted);
  padding: 48px 20px;
}

/* ---------- Modal ---------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 18, 25, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 50;
}

.modal-overlay[hidden] {
  display: none;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  width: 100%;
  max-width: 420px;
}

.modal h2 {
  margin: 0 0 18px;
  font-size: 1.2rem;
}

.modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

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

/* ---------- Fragen ---------- */

.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.tab-switch {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}

.tab-switch button {
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--color-text-muted);
}

.tab-switch button.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.question-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  margin-bottom: 12px;
}

.question-card .q-text {
  font-weight: 600;
  margin-bottom: 10px;
}

.question-actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.question-actions-row .btn {
  width: auto;
}

/* ---------- Fußzeile (Impressum, Datenschutz, Kontakt) ---------- */

/* Muss von jeder Seite aus erreichbar sein - deshalb bewusst statisch
   im HTML und nicht per JavaScript eingefügt. */
.site-footer {
  margin-top: auto;
  padding: 20px 24px;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
  font-size: 0.85rem;
}

.site-footer a {
  color: var(--color-text-muted);
}

.site-footer a:hover {
  color: var(--color-primary);
}

/* ---------- Rechtstexte ---------- */

.legal-content {
  max-width: 760px;
}

.legal-content h1 {
  font-size: 1.6rem;
  margin: 0 0 24px;
}

.legal-content h2 {
  font-size: 1.05rem;
  margin: 30px 0 10px;
}

.legal-content p,
.legal-content li {
  font-size: 0.92rem;
  line-height: 1.65;
}

.legal-content ul {
  padding-left: 20px;
}

.legal-content li {
  margin-bottom: 6px;
}

/* ---------- Kontakt & Support ---------- */

.kontakt-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 880px) {
  .kontakt-layout {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.kontakt-karte {
  max-width: none;
  padding: 24px 22px;
}

.kontakt-karte .rules-confirm {
  margin-bottom: 18px;
}

.faq-liste {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.faq-eintrag {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 12px 16px;
}

.faq-eintrag summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.92rem;
}

.faq-eintrag p {
  margin: 10px 0 2px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ---------- Schulen ---------- */

.schul-bereich {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  margin-bottom: 20px;
}

.schul-liste {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.schul-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 8px 7px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-bg);
  font-size: 0.88rem;
}

.schul-chip .schul-name {
  font-weight: 600;
}

.schul-chip .schul-code {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.schul-chip .icon-btn {
  padding: 0 4px;
  font-size: 0.85rem;
}

/* Überschrift je Schule in der Klassenliste */
.schul-gruppe-titel {
  font-size: 1rem;
  margin: 26px 0 12px;
  color: var(--color-text-muted);
}

.schul-gruppe-titel:first-child {
  margin-top: 0;
}

.schul-gruppe {
  margin-bottom: 4px;
}

/* ---------- Erklärung zu einer Frage ---------- */

/* Bewusst ruhig gehalten und mit Abstand nach oben: Die Erklärung
   erscheint erst, nachdem die Frage aufgelöst wurde. */
.erklaerung-box {
  margin-top: 14px;
  padding: 12px 14px;
  border-left: 3px solid var(--color-info);
  border-radius: 0 8px 8px 0;
  background: rgba(37, 99, 235, 0.07);
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--color-text);
}

.erklaerung-box strong {
  color: var(--color-info);
}

.question-card .erklaerung-box {
  margin-top: 10px;
}

/* ---------- Lernduell (Multiplayer) ---------- */

.duell-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 820px) {
  .duell-layout {
    grid-template-columns: 1.6fr 1fr;
    align-items: start;
  }
}

.duell-punkte {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 8px;
}

.duell-zeile {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 0.9rem;
}

.duell-zeile.selbst {
  background: rgba(79, 70, 229, 0.08);
  font-weight: 600;
}

.duell-platz {
  width: 22px;
  height: 22px;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--color-bg);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
}

.duell-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.duell-score {
  font-weight: 700;
  color: var(--color-primary);
}

/* ---------- Lernmodus: Steuerung & Fortschritt ---------- */

.lern-steuerung {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 18px;
}

.lern-modus {
  display: inline-flex;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 3px;
}

.lern-modus button {
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  cursor: pointer;
}

.lern-modus button.active {
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.lern-fortschritt {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.fortschritt-balken {
  width: 130px;
  height: 7px;
  border-radius: 999px;
  background: var(--color-border);
  overflow: hidden;
}

.fortschritt-balken span {
  display: block;
  height: 100%;
  background: var(--color-success);
  border-radius: 999px;
  transition: width 0.3s;
}

/* ---------- KI-Vorschläge prüfen ---------- */

.modal-wide {
  max-width: 640px;
}

.review-item {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 12px;
  background: var(--color-bg);
}

.review-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 10px;
  cursor: pointer;
}

.review-item textarea.review-question {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: var(--font);
  font-size: 0.92rem;
  font-weight: 600;
  resize: vertical;
  margin-bottom: 10px;
}

.review-erklaerung-label {
  display: block;
  margin: 10px 0 4px;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.review-item textarea.review-explanation {
  width: 100%;
  padding: 8px 11px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: var(--font);
  font-size: 0.86rem;
  resize: vertical;
}

.review-answers .answer-input-row {
  margin-bottom: 6px;
}

.review-answers input[type="text"] {
  padding: 7px 10px;
  font-size: 0.88rem;
}

/* Bei vielen Vorschlägen soll das Fenster nicht endlos wachsen. */
#ai-review-list {
  max-height: 55vh;
  overflow-y: auto;
  margin: 4px -4px 0;
  padding: 0 4px;
}

/* ---------- Passwort vergessen ---------- */

.forgot-row {
  text-align: center;
  font-size: 0.85rem;
  margin: 14px 0 0;
}

/* ---------- Mobiles Klappmenü ---------- */

.menu-toggle {
  display: none;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: inherit;
  font-size: 1.1rem;
  line-height: 1;
  padding: 9px 13px;
  border-radius: 8px;
  cursor: pointer;
}

@media (max-width: 760px) {
  .topbar {
    flex-wrap: wrap;
    gap: 12px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  /* Auf schmalen Bildschirmen wurde die Leiste durch die vielen
     Schaltflächen unübersichtlich hoch - sie steckt jetzt hinter
     dem Menü-Button. */
  .topbar .topbar-actions {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .topbar .topbar-actions.open {
    display: flex;
  }

  .topbar .topbar-actions .btn {
    width: 100%;
    justify-content: flex-start;
  }

  .topbar .view-switch {
    justify-content: center;
  }
}

/* ---------- Ansichtsumschalter für Admins ---------- */

.view-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 4px 3px 10px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-bg);
}

.view-switch-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-right: 2px;
}

.view-switch button {
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
}

.view-switch button:hover:not(.active):not(:disabled) {
  color: var(--color-text);
}

.view-switch button.active {
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.view-switch button:disabled {
  opacity: 0.5;
  cursor: default;
}

/* ---------- Nutzerverwaltung (Admin) ---------- */

.rollen-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 3px 9px;
  border-radius: 999px;
}

.rollen-badge.rolle-lehrer {
  color: var(--color-success);
  background: rgba(22, 163, 74, 0.14);
}

.rollen-badge.rolle-schueler {
  color: var(--color-info);
  background: rgba(37, 99, 235, 0.12);
}

.rollen-badge.rolle-admin {
  color: var(--color-ai);
  background: rgba(124, 58, 237, 0.14);
}

.rollen-badge.rolle-gesperrt {
  color: var(--color-danger);
  background: rgba(220, 38, 38, 0.12);
}

.ai-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: 8px;
  vertical-align: middle;
  color: var(--color-ai);
  background: rgba(124, 58, 237, 0.12);
}

.question-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
}

.answer-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-size: 0.9rem;
}

.answer-row.correct {
  color: var(--color-success);
  font-weight: 600;
}

.answer-inputs {
  display: grid;
  gap: 10px;
}

.answer-input-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.answer-input-row input[type="text"] {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.95rem;
}

.answer-input-row input[type="text"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.answer-input-row input[type="radio"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

/* ---------- Bilder zu Fragen ---------- */

/* Einheitlicher "Rahmen": das Bild wird komplett sichtbar und
   proportional eingepasst (kein Zuschneiden), mit dezentem
   Hintergrund und Rand, damit auch hochkantige/kleine Bilder
   ordentlich aussehen. */
.image-frame {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  /* Groß genug, damit auch hochkantige Bilder (z. B. eingescannte
     Arbeitsblätter) in der normalen Ansicht noch gut lesbar sind,
     aber begrenzt auf kleinen Bildschirmen (vh-Anteil). */
  max-height: min(460px, 60vh);
  min-height: 100px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 12px;
}

.image-frame img {
  display: block;
  max-width: 100%;
  max-height: min(460px, 60vh);
  object-fit: contain;
}

.quiz-image-frame {
  max-height: min(520px, 65vh);
  margin-bottom: 16px;
}

.quiz-image-frame img {
  max-height: min(520px, 65vh);
}

.image-frame-clickable {
  cursor: zoom-in;
  transition: border-color 0.15s;
}

.image-frame-clickable:hover {
  border-color: var(--color-primary);
}

/* ---------- Vollbild-Ansicht (Lightbox) ---------- */

.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 18, 25, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  z-index: 100;
  cursor: zoom-out;
}

.lightbox-overlay[hidden] {
  display: none;
}

.lightbox-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 8px;
  cursor: default;
}

.lightbox-back {
  position: fixed;
  top: 20px;
  left: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  border: none;
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font);
  font-weight: 700;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: var(--shadow);
}

.lightbox-back:hover {
  background: var(--color-bg);
}

@media (max-width: 480px) {
  .lightbox-overlay {
    padding: 16px;
  }

  .lightbox-back {
    top: 12px;
    left: 12px;
    padding: 8px 14px;
  }
}

.image-preview {
  display: block;
  max-width: 100%;
  max-height: min(300px, 45vh);
  width: auto;
  border-radius: 8px;
  margin-top: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  object-fit: contain;
}

.file-input-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.file-input-row input[type="file"] {
  flex: 1;
  min-width: 0;
  font-size: 0.85rem;
}

.quiz-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  text-align: left;
}

.quiz-progress {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

/* ---------- Fragen-Übersicht (Dropdown im Lernmodus) ---------- */

.quiz-overview {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  overflow: hidden;
}

.quiz-overview-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 20px;
  border: none;
  background: none;
  cursor: pointer;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text);
}

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

.quiz-overview-chevron {
  color: var(--color-text-muted);
  transition: transform 0.15s;
}

.quiz-overview-toggle.open .quiz-overview-chevron {
  transform: rotate(180deg);
}

.quiz-overview-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 20px 18px;
  max-height: 220px;
  overflow-y: auto;
}

.quiz-nav-badge {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  font-weight: 700;
}

.quiz-nav-badge.status-correct-first {
  background: rgba(22, 163, 74, 0.15);
  border-color: var(--color-success);
  color: var(--color-success);
}

.quiz-nav-badge.status-correct-retry {
  background: rgba(217, 119, 6, 0.15);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.quiz-nav-badge.status-wrong {
  background: rgba(220, 38, 38, 0.15);
  border-color: var(--color-danger);
  color: var(--color-danger);
}

.quiz-nav-badge.current {
  box-shadow: 0 0 0 2px var(--color-primary);
}

.quiz-question {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.quiz-option {
  display: block;
  width: 100%;
  text-align: left;
  padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  margin-bottom: 10px;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.95rem;
}

.quiz-option.is-correct {
  border-color: var(--color-success);
  background: rgba(22, 163, 74, 0.1);
}

.quiz-option.is-wrong {
  border-color: var(--color-danger);
  background: rgba(220, 38, 38, 0.1);
}

.quiz-option:disabled {
  cursor: default;
  opacity: 0.85;
}

.quiz-feedback {
  margin: 4px 0 0;
  font-weight: 600;
  font-size: 0.95rem;
}

.quiz-feedback.success {
  color: var(--color-success);
}

.quiz-feedback.wrong {
  color: var(--color-danger);
}

.quiz-feedback.retry {
  color: var(--color-warning);
}

.quiz-result {
  text-align: center;
  padding: 20px 0;
}

.hidden {
  display: none !important;
}

.text-muted {
  color: var(--color-text-muted);
}

.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

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

@media (max-width: 480px) {
  .auth-card {
    padding: 28px 22px;
  }
}

/* ---------- Teilnehmer-Verwaltung (Lehrer:innen) ---------- */

.member-hint {
  margin: -8px 0 20px;
  font-size: 0.85rem;
}

.member-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 20px;
  margin-bottom: 12px;
}

.member-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.member-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.member-status {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.member-status-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.status-ok {
  background: rgba(22, 163, 74, 0.12);
  color: var(--color-success);
}

.status-blocked {
  background: rgba(220, 38, 38, 0.12);
  color: var(--color-danger);
}

.member-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.member-actions .btn {
  font-size: 0.8rem;
  padding: 8px 12px;
}

/* ---------- Regeln-Modal (beim ersten Login) ---------- */

.rules-modal {
  max-width: 480px;
}

.rules-list {
  margin: 0 0 18px;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--color-text);
}

.rules-list li {
  line-height: 1.45;
}

.rules-confirm {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  cursor: pointer;
}

.rules-confirm input {
  margin-top: 3px;
  flex: none;
}

/* Ohne diese Zeile würde ein Link im Text zu einem eigenen
   Flex-Element und der Satz bräche in schmale Spalten um. */
.rules-confirm span {
  flex: 1;
  line-height: 1.5;
}

/* Datum und Uhrzeit nebeneinander im Termin-Formular */
.termin-zeile {
  display: flex;
  gap: 10px;
  align-items: center;
}

.termin-zeile input[type="date"] {
  flex: 2;
  min-width: 0;
}

.termin-zeile input[type="time"] {
  flex: 1;
  min-width: 0;
}

@media (max-width: 480px) {
  .termin-zeile {
    flex-direction: column;
    align-items: stretch;
  }
}

/* ---------- Fortschritt beim KI-Generieren ---------- */

.ki-fortschritt {
  margin: 4px 0 14px;
}

.ki-fortschritt-schiene {
  height: 8px;
  border-radius: 999px;
  background: var(--color-border);
  overflow: hidden;
}

.ki-fortschritt-balken {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-ai));
  transition: width 0.45s ease;
}

.ki-fortschritt-schritte {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-top: 8px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.ki-fortschritt-schritte span {
  transition: color 0.2s;
}

.ki-fortschritt-schritte span.aktiv {
  color: var(--color-ai);
  font-weight: 700;
}

.ki-fortschritt-schritte span.fertig {
  color: var(--color-success);
}

@media (max-width: 420px) {
  .ki-fortschritt-schritte {
    font-size: 0.68rem;
  }
}

/* ---------- Dashboard nach dem Login ---------- */

.dash-kopf {
  margin-bottom: 24px;
}

.dash-kopf h1 {
  margin: 0 0 4px;
  font-size: 1.6rem;
}

.dash-kopf p {
  margin: 0;
  font-size: 0.95rem;
}

.dash-zahlen {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}

@media (min-width: 640px) {
  .dash-zahlen {
    grid-template-columns: repeat(4, 1fr);
  }
}

.dash-zahl {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.dash-zahl-wert {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.1;
}

.dash-zahl-titel {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.dash-abschnitt-titel {
  font-size: 1rem;
  margin: 0 0 12px;
  color: var(--color-text);
}

.dash-termine {
  margin-bottom: 28px;
}

.dash-termin {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 12px 16px;
  margin-bottom: 8px;
  color: var(--color-text);
}

.dash-termin:hover {
  background: var(--color-bg);
}

.dash-termin-wann {
  flex: none;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-success);
  background: rgba(22, 163, 74, 0.12);
  padding: 4px 10px;
  border-radius: 999px;
}

.dash-termin-wann.dringend {
  color: var(--color-danger);
  background: rgba(220, 38, 38, 0.12);
}

.dash-termin-titel {
  flex: 1;
  font-weight: 600;
  font-size: 0.92rem;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dash-termin-datum {
  flex: none;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.dash-kacheln {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 560px) {
  .dash-kacheln {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .dash-kacheln {
    grid-template-columns: repeat(3, 1fr);
  }
}

.dash-kachel {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  color: var(--color-text);
  border: 1px solid transparent;
  transition: border-color 0.15s, transform 0.05s;
}

.dash-kachel:hover {
  border-color: var(--color-primary);
}

.dash-kachel:active {
  transform: scale(0.995);
}

.dash-kachel-haupt {
  border-color: rgba(79, 70, 229, 0.35);
  background: linear-gradient(180deg, rgba(79, 70, 229, 0.05), var(--color-surface) 60%);
}

.dash-kachel-icon {
  font-size: 1.5rem;
  line-height: 1.1;
}

.dash-kachel-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.dash-kachel-text strong {
  font-size: 0.95rem;
}

.dash-kachel-text span {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

@media (max-width: 400px) {
  .dash-termin {
    flex-wrap: wrap;
    gap: 8px;
  }
  .dash-termin-titel {
    white-space: normal;
    flex-basis: 100%;
    order: 3;
  }
}

/* ---------- Herkunft einer Frage (Info-Symbol) ----------
   Nur für Lehrkräfte sichtbar. Bewusst ein kleines, ruhiges Symbol
   direkt hinter dem Fragetext: Es soll auffindbar sein, aber die
   Frage selbst nicht überlagern. */
.q-info-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  margin-left: 8px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: transparent;
  color: var(--color-text-muted);
  font-family: Georgia, "Times New Roman", serif;
  font-style: italic;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  vertical-align: middle;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.q-info-btn:hover,
.q-info-btn[aria-expanded="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.q-info {
  margin: 8px 0 4px;
  padding: 8px 12px;
  border-left: 3px solid var(--color-border);
  border-radius: 0 6px 6px 0;
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.q-info strong {
  color: var(--color-text);
}