/* Demo-Modus: Einstieg (Code-Eingabe) und Split-Ansicht. Nutzt die Tokens der App;
   Akzent ist das Sparkassen-Rot, das auch Leinwand und Handy-Ansicht verwenden. */
.demo-entry,
.demo-split {
  --accent: #e4002b;
  --accent-hover: #c00024;
  --accent-soft: #fde8ec;
  --bezel: #121216;
}

/* ---------------------------- Einstieg ---------------------------- */
.demo-entry {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: var(--space-4);
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(228, 0, 43, 0.08), transparent 60%),
    radial-gradient(900px 500px at 110% 110%, rgba(23, 23, 27, 0.06), transparent 60%),
    var(--paper);
}

.entry-card {
  width: 100%;
  max-width: 520px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: clamp(24px, 5vw, 40px);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.entry-logo {
  width: 240px;
  max-width: 70%;
  height: auto;
  margin: 0 0 var(--space-2) -6px;
}

.entry-eyebrow {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.entry-card h1 {
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  letter-spacing: -0.02em;
}

.entry-lead {
  color: var(--ink-soft);
  line-height: 1.55;
}

.entry-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.entry-form label {
  font-weight: 600;
  font-size: 0.9rem;
}

.entry-form input {
  font: inherit;
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 14px 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
}

.entry-form input:focus-visible {
  outline: 3px solid var(--accent-soft);
  border-color: var(--accent);
}

.entry-form .btn {
  margin-top: var(--space-2);
}

.entry-error {
  color: var(--danger);
  font-size: 0.95rem;
}

/* -------------------------- Split-Ansicht -------------------------- */
.demo-split {
  height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--surface-2);
  overflow: hidden;
}

.demo-bar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 10px var(--space-5);
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  z-index: 2;
}

.demo-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.demo-brand img {
  height: 40px;
  width: auto;
}

.demo-brand div {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}

.demo-brand span {
  color: var(--ink-muted);
  font-size: 0.85rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.demo-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.demo-status {
  color: var(--ink-muted);
  font-size: 0.85rem;
}

.demo-actions .btn.is-confirm {
  border-color: var(--accent);
  color: var(--accent);
}

.demo-grid {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(380px, 26%) minmax(0, 1fr) minmax(260px, 20%);
  gap: var(--space-4);
  padding: var(--space-4);
}

.demo-pane {
  min-height: 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.pane-title {
  font-size: 0.95rem;
  font-weight: 600;
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.pane-title span {
  font-weight: 400;
  color: var(--ink-muted);
  font-size: 0.85rem;
}

.pane-frame {
  position: relative;
  min-height: 0;
  overflow: hidden;
  border-radius: var(--radius);
}

.pane-frame iframe {
  border: 0;
  display: block;
  background: var(--surface);
}

/* Lehrerpult: echte Breite, scrollt im eigenen Rahmen. */
.frame-teacher {
  flex: 1;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.frame-teacher iframe {
  width: 100%;
  height: 100%;
}

/* Leinwand und Smartphone: in Originalgroesse gerendert und skaliert (client/demo/main.ts). */
.frame-screen,
.frame-phone {
  background: var(--bezel);
  box-shadow: var(--shadow-md);
}

.frame-screen {
  aspect-ratio: 16 / 9;
  width: 100%;
  flex: none;
  border: 6px solid var(--bezel);
}

.frame-phone {
  flex: 1 1 auto;
  aspect-ratio: 390 / 844;
  align-self: center;
  max-width: 100%;
  border-radius: 34px;
  border: 10px solid var(--bezel);
}

.frame-screen iframe,
.frame-phone iframe {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
}

.demo-info {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-4);
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-4);
}

.demo-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  width: 150px;
}

.demo-qr img {
  width: 150px;
  height: 150px;
}

.demo-qr figcaption {
  font-size: 0.8rem;
  color: var(--ink-soft);
  text-align: center;
  line-height: 1.35;
}

.demo-hints h3 {
  font-size: 0.95rem;
  margin-bottom: var(--space-2);
}

.demo-hints ol {
  padding-left: 1.2em;
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.45;
}

.demo-tabs {
  display: none;
}

.demo-message {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: var(--space-4);
  background: var(--paper);
  z-index: 10;
}

.demo-message[hidden] {
  display: none;
}

/* Schmal (Tablet/Handy): eine Ansicht zur Zeit, per Reiter umschaltbar. */
@media (max-width: 1099px) {
  .demo-bar {
    flex-wrap: wrap;
    padding: 10px var(--space-4);
  }

  .demo-tabs {
    order: 3;
    width: 100%;
    display: flex;
    gap: var(--space-1);
    background: var(--surface-2);
    border-radius: var(--radius-pill);
    padding: 4px;
  }

  .demo-tabs button {
    flex: 1;
    font: inherit;
    font-size: 0.9rem;
    border: 0;
    border-radius: var(--radius-pill);
    padding: 8px 10px;
    background: transparent;
    color: var(--ink-soft);
    cursor: pointer;
  }

  .demo-tabs button[aria-selected="true"] {
    background: var(--surface);
    color: var(--ink);
    box-shadow: var(--shadow-sm);
    font-weight: 600;
  }

  .demo-grid {
    grid-template-columns: minmax(0, 1fr);
    padding: var(--space-3);
  }

  .demo-pane {
    display: none;
  }

  .demo-grid[data-active="screen"] .pane-screen,
  .demo-grid[data-active="teacher"] .pane-teacher,
  .demo-grid[data-active="phone"] .pane-phone {
    display: flex;
  }

  .pane-screen {
    overflow-y: auto;
  }

  .demo-info {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
  }

  .demo-status {
    display: none;
  }
}