:root {
  --paper: #f3f0e8;
  --card: #fbfaf6;
  --ink: #141414;
  --mute: #6f6a5f;
  --line: #ddd7ca;
  --line2: #e9e4d8;
  --accent: #ff5a1f;
  --accent-ink: #fff;
  --field: #fff;
  --shadow: 0 1px 0 rgba(20,20,20,.04), 0 12px 32px -12px rgba(40,30,10,.18);
  --sans: "Instrument Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #121211;
    --card: #1a1917;
    --ink: #ece8de;
    --mute: #8e897d;
    --line: #2f2d29;
    --line2: #252320;
    --field: #141413;
    --shadow: 0 1px 0 rgba(0,0,0,.3), 0 16px 40px -16px rgba(0,0,0,.6);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #121211;
  --card: #1a1917;
  --ink: #ece8de;
  --mute: #8e897d;
  --line: #2f2d29;
  --line2: #252320;
  --field: #141413;
  --shadow: 0 1px 0 rgba(0,0,0,.3), 0 16px 40px -16px rgba(0,0,0,.6);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 15px/1.45 var(--sans);
  min-height: 100vh;
}
button, input, select, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }

/* header */
.bar { max-width: 1240px; margin: 0 auto; padding: 22px 24px 6px; display: flex; align-items: center; justify-content: space-between; }
.theme { width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 50%; background: var(--card); cursor: pointer; display: grid; place-items: center; padding: 0; transition: border-color .15s; }
.theme:hover { border-color: var(--ink); }
.theme svg { width: 17px; height: 17px; fill: none; stroke: var(--ink); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.theme .sun { display: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .theme .sun { display: block; } :root:not([data-theme="light"]) .theme .moon { display: none; } }
:root[data-theme="dark"] .theme .sun { display: block; }
:root[data-theme="dark"] .theme .moon { display: none; }
.mark { display: inline-flex; align-items: center; gap: 10px; font: 500 15px var(--mono); color: var(--ink); text-decoration: none; letter-spacing: -.01em; }
.mark .dim { color: var(--mute); }
.mark-sq { width: 14px; height: 14px; background: var(--ink); box-shadow: inset 0 0 0 3px var(--ink), inset 0 0 0 5px var(--paper); position: relative; }
.mark-sq::after { content: ""; position: absolute; right: -6px; bottom: -6px; width: 5px; height: 5px; background: var(--accent); }

/* layout */
.layout {
  max-width: 1240px; margin: 0 auto; padding: 18px 24px 64px;
  display: grid; gap: 20px;
  grid-template-columns: minmax(0, 1fr) minmax(0, 440px);
  grid-template-areas: "content preview" "style preview";
  align-items: start;
}
.content { grid-area: content; }
.style { grid-area: style; }
.preview { grid-area: preview; position: sticky; top: 20px; }

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  box-shadow: var(--shadow);
}

/* type tabs */
.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.tabs button {
  border: 1px solid var(--line); background: transparent; border-radius: 999px;
  padding: 7px 14px; cursor: pointer; font-weight: 500; font-size: 14px;
  transition: background .15s, border-color .15s, color .15s;
}
.tabs button:hover { border-color: var(--mute); }
.tabs button.on { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* fields */
fieldset { border: 0; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px 14px; }
.full { grid-column: 1 / -1; }
.f { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.f > span, h3, .rng > span {
  font: 500 11px var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--mute);
}
.f small, h3 small { text-transform: none; letter-spacing: 0; opacity: .7; }
input:not([type]), input[type=email], input[type=tel], input[type=date], select, textarea {
  width: 100%; background: var(--field); border: 1px solid var(--line); border-radius: 9px;
  padding: 9px 11px; outline: none; transition: border-color .15s, box-shadow .15s;
}
textarea { resize: vertical; font-family: var(--mono); font-size: 14px; }
input:focus, select:focus, textarea:focus { border-color: var(--ink); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
.hint { font: normal 12px var(--mono); color: var(--mute); min-height: 1em; }
.hint.bad { color: #d23b16; }
.hint.ok { color: #2f8a4c; }

.chk { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-size: 14px; user-select: none; }
.chk input { accent-color: var(--accent); width: 16px; height: 16px; margin: 0; }

.payload {
  margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--line);
  display: flex; gap: 12px; align-items: baseline; min-width: 0;
}
.payload span { font: 500 11px var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--mute); flex: none; }
.payload code { font: 12px/1.5 var(--mono); color: var(--mute); white-space: pre-wrap; word-break: break-all; max-height: 7.5em; overflow: auto; }

/* segmented */
.seg { display: inline-flex; background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 3px; gap: 2px; }
.seg.full { display: flex; }
.seg button { flex: 1; border: 0; background: transparent; padding: 6px 14px; border-radius: 7px; cursor: pointer; font-weight: 500; white-space: nowrap; }
.seg button small { font: 11px var(--mono); color: var(--mute); margin-left: 3px; }
.seg button.on { background: var(--card); box-shadow: 0 1px 2px rgba(0,0,0,.12), 0 0 0 1px var(--line); }

/* preview */
.sheet {
  position: relative;
  background-color: var(--card);
  background-image:
    linear-gradient(var(--line2) 1px, transparent 1px),
    linear-gradient(90deg, var(--line2) 1px, transparent 1px);
  background-size: 20px 20px;
  background-position: -1px -1px;
  border: 1px solid var(--line); border-radius: 14px;
  padding: 44px 44px 36px 36px;
  box-shadow: var(--shadow);
}
.stage { aspect-ratio: 1; position: relative; }
.stage svg { display: block; width: 100%; height: 100%; filter: drop-shadow(0 10px 18px rgba(0,0,0,.12)); }
.stage.transp {
  background: repeating-conic-gradient(var(--line) 0 25%, transparent 0 50%) 0 0 / 14px 14px;
}
.dim-x, .dim-y { position: absolute; font: 11px var(--mono); color: var(--mute); display: flex; align-items: center; justify-content: center; }
.dim-x { left: 36px; right: 44px; top: 16px; height: 14px; border-left: 1px solid var(--mute); border-right: 1px solid var(--mute); }
.dim-x::before { content: ""; position: absolute; left: 0; right: 0; top: 50%; border-top: 1px solid var(--mute); opacity: .6; }
.dim-x span, .dim-y span { background: var(--card); padding: 0 8px; position: relative; white-space: nowrap; }
.dim-y { top: 44px; bottom: 36px; right: 14px; width: 14px; border-top: 1px solid var(--mute); border-bottom: 1px solid var(--mute); }
.dim-y::before { content: ""; position: absolute; top: 0; bottom: 0; left: 50%; border-left: 1px solid var(--mute); opacity: .6; }
.dim-y span { transform: rotate(90deg); }

.meta { display: flex; flex-wrap: wrap; gap: 6px 16px; margin: 14px 4px 0; font: 12px var(--mono); color: var(--mute); }
.meta b { color: var(--ink); font-weight: 500; }
.err, .warn { margin-top: 12px; padding: 10px 12px; border-radius: 9px; font-size: 13.5px; }
.err { background: color-mix(in srgb, #e5391a 12%, var(--card)); color: #c7300f; border: 1px solid color-mix(in srgb, #e5391a 35%, transparent); }
.warn { background: color-mix(in srgb, #e8a512 14%, var(--card)); border: 1px solid color-mix(in srgb, #e8a512 40%, transparent); }

.export { display: grid; grid-template-columns: repeat(4, 1fr) auto; gap: 8px; margin-top: 16px; }
.btn {
  border: 1px solid var(--line); background: var(--card); border-radius: 10px;
  padding: 11px 10px; font-weight: 600; cursor: pointer; letter-spacing: .01em;
  transition: transform .08s, border-color .15s, background .15s;
}
.btn:hover { border-color: var(--ink); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.05); }
.btn.kicad { font-family: var(--mono); font-size: 13px; font-weight: 500; }
.btn.ghost { background: transparent; }
.btn.done { border-color: #2f8a4c; color: #2f8a4c; }
.btn:disabled { opacity: .4; pointer-events: none; }

/* style panel */
.group + .group { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line2); }
.group.two { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
h3 { margin: 0 0 10px; }
.picks { display: grid; grid-template-columns: repeat(auto-fill, minmax(64px, 1fr)); gap: 8px; }
.picks.sm { grid-template-columns: repeat(auto-fill, minmax(42px, 1fr)); gap: 6px; }
.picks button {
  aspect-ratio: 1; border: 1px solid var(--line); background: var(--field); border-radius: 10px;
  cursor: pointer; padding: 12px; display: grid; place-items: center; color: var(--ink);
  transition: border-color .15s, box-shadow .15s;
}
.picks.sm button { padding: 8px; }
.picks button:hover { border-color: var(--mute); }
.picks button.on { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent); }
.picks svg { width: 100%; height: 100%; display: block; }

.colors { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.sw {
  display: grid; grid-template-columns: 34px 1fr; grid-template-rows: auto auto; column-gap: 10px;
  align-items: center; border: 1px solid var(--line); border-radius: 10px; padding: 8px; background: var(--field); cursor: pointer;
}
.sw input { grid-row: 1 / 3; width: 34px; height: 34px; border: 0; padding: 0; background: none; cursor: pointer; border-radius: 7px; }
.sw input::-webkit-color-swatch-wrapper { padding: 0; }
.sw input::-webkit-color-swatch { border: 1px solid var(--line); border-radius: 7px; }
.sw input::-moz-color-swatch { border: 1px solid var(--line); border-radius: 7px; }
.sw span { font-size: 13px; font-weight: 500; }
.sw code { font: 11px var(--mono); color: var(--mute); text-transform: uppercase; }
.sw.off { opacity: .45; }
.row { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 12px; }
.presets { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.presets button {
  width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--line); cursor: pointer; padding: 0;
  transition: transform .12s;
}
.presets button:hover { transform: scale(1.12); }

.rng { display: grid; grid-template-columns: 96px 1fr 116px; align-items: center; gap: 12px; padding: 4px 0; }
.rng > .num { text-transform: none; letter-spacing: 0; }
.num { display: flex; align-items: center; border: 1px solid var(--line); border-radius: 8px; background: var(--field); padding-right: 9px; transition: border-color .15s; }
.num:focus-within { border-color: var(--ink); }
.num input { width: 100%; min-width: 0; border: 0; background: none; outline: none; padding: 6px 4px 6px 9px; font: 13px var(--mono); text-align: right; -moz-appearance: textfield; }
.num input::-webkit-inner-spin-button, .num input::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
.num i { font: normal 11px var(--mono); color: var(--mute); }
input[type=range] { width: 100%; accent-color: var(--accent); }

/* responsive */
@media (max-width: 920px) {
  .layout { grid-template-columns: minmax(0, 1fr); grid-template-areas: "content" "preview" "style"; }
  .preview { position: static; max-width: 480px; width: 100%; justify-self: center; }
}
@media (max-width: 560px) {
  .bar { padding: 16px 16px 4px; }
  .layout { padding: 12px 16px 48px; gap: 16px; }
  .panel { padding: 16px; }
  fieldset { grid-template-columns: 1fr; }
  .tabs button { padding: 6px 11px; font-size: 13px; }
  .sheet { padding: 36px 34px 28px 22px; }
  .dim-x { left: 22px; right: 34px; top: 11px; }
  .dim-y { top: 36px; bottom: 28px; right: 10px; }
  .export { grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 6px; }
  .btn { padding: 10px 4px; font-size: 13.5px; }
  .group.two { grid-template-columns: 1fr; }
  .colors { grid-template-columns: 1fr; }
  .rng { grid-template-columns: 76px 1fr 100px; gap: 10px; }
}