:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1b1d21;
  --muted: #61656e;
  --line: #dcdfe4;
  --accent: #d93036;
  --accent-text: #ffffff;
  --field: #ffffff;
  --ok: #1a7f37;
  --warn: #9a6700;
  --error: #c62828;
  --info: #2457c5;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111214;
    --card: #1b1d21;
    --text: #e9eaed;
    --muted: #9ea3ad;
    --line: #2e3138;
    --accent: #e5484d;
    --field: #24272c;
    --ok: #3fb950;
    --warn: #d29922;
    --error: #f26b6b;
    --info: #6ea8fe;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 "Segoe UI Variable", "Segoe UI", system-ui, sans-serif;
  padding-bottom: 80px;
}

h1 { font-size: 20px; margin: 0; }
h2 { font-size: 16px; margin: 20px 0 8px; }
.card > h2:first-child, .section-head h2 { margin-top: 0; }
.muted { color: var(--muted); }
.warn { color: var(--warn); }

button, .button, select, input[type="number"] {
  font: inherit;
  color: var(--text);
  background: var(--field);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 12px;
}

button, .button { cursor: pointer; }
button:hover:not(:disabled), .button:hover { border-color: var(--muted); }
button:disabled { opacity: 0.5; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
button.link { background: none; border: none; padding: 0; color: var(--info); text-decoration: underline; }
a { color: var(--info); }

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px max(16px, calc((100% - 1000px) / 2));
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.sub { margin: 2px 0 0; color: var(--muted); font-size: 13px; }
.top-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.profile-pick { display: flex; gap: 8px; align-items: center; color: var(--muted); }

main { max-width: 1000px; margin: 20px auto; padding: 0 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.welcome ol { padding-left: 20px; }
.welcome li { margin: 6px 0; }

.banner {
  margin-bottom: 16px;
  padding: 10px 14px;
  border-radius: var(--radius);
  border: 1px solid currentColor;
  background: var(--card);
}
.banner.ok { color: var(--ok); }
.banner.warn { color: var(--warn); }
.banner.error { color: var(--error); }
.banner.info { color: var(--info); }

.tabs { display: flex; gap: 4px; margin-bottom: 12px; overflow-x: auto; }
.tabs button { border: none; background: none; border-radius: 8px; white-space: nowrap; color: var(--muted); }
.tabs button[aria-selected="true"] { background: var(--card); color: var(--text); font-weight: 600; box-shadow: 0 0 0 1px var(--line); }

.section-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.preset { display: flex; gap: 8px; flex-wrap: wrap; }

.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.grid.side { margin-bottom: 8px; }
.field { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.field select { width: 100%; color: var(--text); }

.dpi-rows { display: flex; flex-direction: column; gap: 12px; }
.dpi-row { display: grid; grid-template-columns: 120px 1fr 110px; gap: 16px; align-items: center; }
.dpi-row.off input[type="range"], .dpi-row.off input[type="number"] { opacity: 0.4; }
.dpi-row input[type="range"] { width: 100%; accent-color: var(--accent); }
.switch { display: flex; gap: 8px; align-items: center; cursor: pointer; }
.switch input { accent-color: var(--accent); width: 18px; height: 18px; }

.color-row { display: flex; flex-direction: column; gap: 16px; }
.picker { display: flex; flex-direction: column; gap: 14px; width: 100%; max-width: 400px; }
.picker-top { display: flex; gap: 14px; }
.spectrum {
  position: relative; flex: 1; aspect-ratio: 1; border-radius: 6px; cursor: crosshair; touch-action: none;
  background: linear-gradient(to right, #f00, #ff0 16.66%, #0f0 33.33%, #0ff 50%, #00f 66.66%, #f0f 83.33%, #f00);
}
.spectrum-white { position: absolute; inset: 0; border-radius: inherit; background: linear-gradient(to bottom, transparent, #fff); }
.spectrum::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background: #000; opacity: var(--dim, 0); pointer-events: none; }
.spectrum:focus-visible { outline: 2px solid var(--info); outline-offset: 2px; }
.marker {
  position: absolute; z-index: 1; width: 16px; height: 16px; margin: -8px 0 0 -8px; border-radius: 50%;
  border: 2px solid #fff; box-shadow: 0 0 0 1px #000; pointer-events: none;
}
.preview { width: 56px; border-radius: 6px; border: 1px solid var(--line); }
.brightness { -webkit-appearance: none; appearance: none; height: 12px; border-radius: 6px; margin: 0; }
.brightness::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%; background: #fff; border: 2px solid var(--muted); cursor: pointer; }
.brightness::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: #fff; border: 2px solid var(--muted); cursor: pointer; }
.picker-fields { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 8px; }
.picker-fields label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.picker-fields input { width: 100%; min-width: 0; font: inherit; color: var(--text); background: var(--field); border: 1px solid var(--line); border-radius: 8px; padding: 7px 10px; }
.swatches { display: flex; gap: 8px; flex-wrap: wrap; }
.swatch { width: 36px; height: 36px; padding: 0; border-radius: 50%; border: 2px solid var(--line); }

.segmented { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.segmented button { border: none; border-radius: 0; border-right: 1px solid var(--line); }
.segmented button:last-child { border-right: none; }
.segmented button[aria-checked="true"] { background: var(--accent); color: var(--accent-text); font-weight: 600; }

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

.savebar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px max(16px, calc((100% - 1000px) / 2));
  background: var(--card);
  border-top: 1px solid var(--line);
}

.help { max-width: 1000px; margin: 20px auto; padding: 0 16px; }
.help details { border-top: 1px solid var(--line); padding: 10px 0; }
.help details:first-of-type { border-top: none; }
.help summary { cursor: pointer; font-weight: 600; }
.help ol, .help p { margin: 8px 0 0; }
.welcome .banner { margin-bottom: 12px; }

.footnote { text-align: center; color: var(--muted); font-size: 12px; }

@media (max-width: 700px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dpi-row { grid-template-columns: 1fr 100px; }
  .dpi-row input[type="range"] { grid-column: 1 / -1; grid-row: 2; }
}