:root {
  --bg: #FFFFFF;
  --ink: #1A1A1A;
  --ink-2: #555555;
  --ink-3: #888888;
  --line: #D5D5D5;
  --line-soft: #E9E9E9;
  --field: #F6F6F6;
  --accent: #1A4FD6;
  --accent-ink: #FFFFFF;
  --ok: #1B7A3D;
  --bad: #B3261E;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17181A; --ink: #E8E8E8; --ink-2: #AFAFAF; --ink-3: #7E7E7E;
    --line: #3A3C40; --line-soft: #2A2C30; --field: #202225;
    --accent: #5C86FF; --accent-ink: #10131A; --ok: #64C083; --bad: #FF7B6E;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
}

main { max-width: 920px; margin: 0 auto; padding: 24px 20px 36px; }

h1 { font-size: 20px; font-weight: 700; margin: 0 0 22px; }

.cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 28px;
  align-items: start;
}
@media (max-width: 720px) {
  .cols { grid-template-columns: minmax(0, 1fr); gap: 22px; }
}

.block { margin-bottom: 18px; }
.block:last-child { margin-bottom: 0; }

#token {
  display: block;
  font-family: var(--mono);
  font-size: clamp(22px, 4.2vw, 31px);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-align: center;
  border: 2px dashed var(--line);
  background: var(--field);
  padding: 14px 8px;
  word-break: break-all;
}

.status { margin: 10px 0 0; color: var(--ink-2); font-size: 15px; }
.status b { font-weight: 700; }
.status b.on { color: var(--ok); }
.status b.off { color: var(--bad); }
.status .dim { color: var(--ink-3); }

.btnrow { display: flex; gap: 10px; flex-wrap: wrap; }
.btnrow button { flex: 1 1 auto; }

button {
  font-family: inherit;
  font-size: 16px;
  font-weight: 600;
  padding: 13px 16px;
  border: 2px solid var(--line);
  background: var(--field);
  color: var(--ink);
  cursor: pointer;
}
button:hover:enabled { border-color: var(--accent); }
button[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
}
button:disabled { opacity: 0.4; cursor: default; }
button.small { font-size: 14px; font-weight: 500; padding: 8px 13px; flex: 0 0 auto; }

.preview {
  position: relative;
  background: #000;
  border: 2px solid var(--line);
  aspect-ratio: 4 / 3;
}
.preview canvas { display: block; width: 100%; height: 100%; }

.transport {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  padding: 8px 10px;
  border: 2px solid var(--line);
  background: var(--field);
}
.transport input[type="range"] { flex: 1 1 auto; min-width: 0; accent-color: var(--accent); }
.transport .time {
  font-family: var(--mono);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--ink-2);
  flex: none;
}
button.icon {
  flex: none;
  width: 38px; height: 38px;
  padding: 0;
  display: grid;
  place-items: center;
  border-width: 2px;
}
button.icon svg { width: 18px; height: 18px; display: block; }
button.icon svg path { fill: currentColor; }

.qrow { display: flex; gap: 10px; align-items: stretch; margin-top: 12px; }
.qrow .presets { display: flex; gap: 10px; flex: 1 1 auto; }
.qrow .presets button { flex: 1; padding: 13px 4px; }
.gear { flex: none; width: 50px; display: grid; place-items: center; padding: 0; }
.gear svg { width: 21px; height: 21px; display: block; }
.gear svg path { fill: currentColor; }

.advanced {
  margin-top: 10px;
  padding: 12px 14px;
  border: 2px solid var(--line);
  background: var(--field);
}
.advanced input[type="range"] { width: 100%; accent-color: var(--accent); }
.advanced .readout {
  margin: 6px 0 0;
  text-align: center;
  font-family: var(--mono);
  font-size: 15px;
  color: var(--ink-2);
}

.applyrow { display: flex; align-items: center; gap: 12px; margin-top: 10px; }

.warn { margin-top: 10px; color: var(--bad); font-size: 15px; }
.warn a { color: inherit; }

[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }