:root {
  color-scheme: dark;
  --ink: #0c0c0e;
  --surface: #141418;
  --line: #2a2a31;
  --text: #ecebe7;
  --muted: #8b8b93;
  --signal: #ff4436;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
}

body {
  background: var(--ink);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
  min-height: 100vh;
  display: grid;
  place-items: start center;
  padding: clamp(1.5rem, 5vw, 4rem) 1.25rem;
}

.app {
  width: min(56rem, 100%);
  display: grid;
  gap: 1.75rem;
}

.masthead {
  display: grid;
  gap: 0.35rem;
}

.wordmark {
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  font-weight: 600;
  letter-spacing: -0.03em;
}

.wordmark::after {
  content: "";
  display: inline-block;
  width: 0.42rem;
  height: 0.42rem;
  margin-left: 0.4rem;
  border-radius: 50%;
  background: var(--signal);
  vertical-align: 0.35em;
}

.tagline {
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 34rem;
}

.stage {
  position: relative;
  height: min(58vh, 28rem);
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  overflow: hidden;
}

.stage[data-empty] {
  border-style: dashed;
  background: repeating-linear-gradient(
    135deg,
    transparent 0 14px,
    rgba(255, 255, 255, 0.018) 14px 28px
  );
}

.stage__video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

.stage[data-empty] .stage__video {
  display: none;
}

.stage__hint {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 0 2rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.stage:not([data-empty]) .stage__hint {
  display: none;
}

.console {
  display: grid;
  gap: 1.1rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  padding: 1.1rem 1.25rem 1.25rem;
}

.readout {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  font-family: var(--mono);
}

.readout__time {
  font-size: 1.9rem;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.readout__size {
  color: var(--muted);
  font-size: 0.8rem;
}

.beacon {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--line);
  align-self: center;
}

.beacon[data-live] {
  background: var(--signal);
  animation: pulse 1.6s ease-in-out infinite;
}

.beacon[data-held] {
  background: #d9a441;
}

@keyframes pulse {
  50% { opacity: 0.25; }
}

@media (prefers-reduced-motion: reduce) {
  .beacon[data-live] { animation: none; }
}

.settings {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  padding-block: 0.9rem;
  border-block: 1px solid var(--line);
  font-size: 0.85rem;
}

.toggle,
.picker {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--muted);
  cursor: pointer;
}

.toggle input {
  accent-color: var(--signal);
  width: 1rem;
  height: 1rem;
  cursor: pointer;
}

.picker select {
  font: inherit;
  font-family: var(--mono);
  color: var(--text);
  background: var(--ink);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 0.3rem 0.5rem;
  cursor: pointer;
}

.settings:has(:disabled) {
  opacity: 0.5;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.button {
  font: inherit;
  font-size: 0.9rem;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 0.55rem 1.1rem;
  cursor: pointer;
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s;
}

.button:hover {
  border-color: #494954;
  background: rgba(255, 255, 255, 0.03);
}

.button:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.button--record {
  border-color: var(--signal);
  color: var(--signal);
}

.button--record:hover {
  background: rgba(255, 68, 54, 0.1);
  border-color: var(--signal);
}

.button--save {
  border-color: var(--text);
}

.button[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
}

.notice {
  color: var(--signal);
  font-size: 0.85rem;
  font-family: var(--mono);
}