:root {
  color-scheme: light dark;
  --bg: #16181d;
  --panel: #22252c;
  --border: #333842;
  --text: #e6e8ec;
  --muted: #9aa2b1;
  --accent: #4c8dff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 system-ui, -apple-system, Segoe UI, sans-serif;
}

header {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.75rem 1rem;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

h1 {
  font-size: 1rem;
  margin: 0;
  font-weight: 600;
}

button,
select {
  font: inherit;
  padding: 0.4rem 0.9rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #2c313a;
  color: var(--text);
  cursor: pointer;
}

button:disabled {
  opacity: 0.45;
  cursor: default;
}

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

#status {
  color: var(--muted);
  margin-left: auto;
}

main {
  display: grid;
  gap: 1rem;
  padding: 1rem;
}

.sender main {
  grid-template-columns: 1fr 22rem;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
}

.panel h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0 0.5rem;
}

.panel b {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.viewer {
  font-size: 0.8rem;
  color: var(--muted);
  padding: 0.25rem 0;
  border-top: 1px solid var(--border);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--text);
}

#preview {
  display: block;
  max-width: 100%;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #000;
}

/* Viewer: Canvas füllt den Rest des Fensters. */
.viewer-page main {
  padding: 0;
  height: calc(100vh - 3.25rem);
}

#stage {
  position: relative;
  width: 100%;
  height: 100%;
  background: #000;
  overflow: hidden;
}

#stage canvas {
  display: block;
  width: 100%;
  height: 100%;
}

#overlay {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  background: rgba(20, 22, 27, 0.85);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  font-size: 0.8rem;
  pointer-events: none;
  backdrop-filter: blur(6px);
}