@font-face {
  font-family: "Zecer UI";
  src: url("/ui-font.ttf") format("truetype");
  font-weight: 600;
  font-display: swap;
}

:root {
  --paper: #f4f1ea;
  --paper-2: #ebe6db;
  --card: #fbfaf6;
  --ink: #1b1a17;
  --ink-2: #57534b;
  --ink-3: #8a857a;
  --rule: #d9d3c5;
  --accent: #d7261e;
  --accent-ink: #ffffff;
  --stage: #2b2a27;
  --stage-grid: rgba(255, 255, 255, 0.04);
  --warn-bg: #fff3d6;
  --warn-ink: #7a5300;
  --info-bg: #e7eefb;
  --info-ink: #24497f;
  --err-bg: #fde4e2;
  --err-ink: #8c1a14;
  --focus: #2f6fe4;
  --radius: 10px;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #171614;
    --paper-2: #201e1b;
    --card: #1f1d1a;
    --ink: #eeeae1;
    --ink-2: #b9b3a6;
    --ink-3: #8a857a;
    --rule: #34312c;
    --stage: #0f0e0d;
    --stage-grid: rgba(255, 255, 255, 0.035);
    --warn-bg: #3a2e12;
    --warn-ink: #f2cd78;
    --info-bg: #1b2a42;
    --info-ink: #a9c6f4;
    --err-bg: #3d1714;
    --err-ink: #f4aaa4;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 15px/1.45 var(--sans);
  -webkit-font-smoothing: antialiased;
}

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px clamp(16px, 4vw, 40px);
  border-bottom: 1px solid var(--rule);
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--paper);
  font: 600 22px/1 "Zecer UI", var(--sans);
  box-shadow: inset 0 -4px 0 var(--accent);
}
.brand h1 { margin: 0; font: 600 24px/1 "Zecer UI", var(--sans); letter-spacing: 0.02em; }
.brand p { margin: 3px 0 0; color: var(--ink-2); font-size: 13px; }
.version { font: 12px var(--mono); color: var(--ink-3); }

main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px clamp(16px, 4vw, 40px) 56px;
  display: grid;
  gap: 24px;
}

/* Stage ------------------------------------------------------------------ */

.stage {
  background: var(--stage);
  background-image:
    linear-gradient(var(--stage-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--stage-grid) 1px, transparent 1px);
  background-size: 24px 24px;
  border-radius: 14px;
  padding: clamp(16px, 3vw, 32px);
  color: #e9e5dc;
}

.stage-frame {
  position: relative;
  overflow-x: auto;
  padding-bottom: 4px;
}
#preview {
  display: block;
  width: 100%;
  min-width: 720px;
  aspect-ratio: 510 / 20;
  filter: drop-shadow(0 6px 14px rgba(0, 0, 0, 0.45));
  transition: opacity 0.15s;
}
#preview:not([src]) { visibility: hidden; }
.stage.busy #preview { opacity: 0.55; }
.stage.failed #preview { opacity: 0.3; filter: grayscale(1); }
.stage-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #a39e93;
  font-size: 14px;
}
.stage-empty[hidden] { display: none; }

.stage-bar {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
}

.facts { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0; font: 12px var(--mono); }
.facts div { display: flex; gap: 6px; }
.facts dt { color: #8f8a80; }
.facts dd { margin: 0; color: #f4f1ea; }

.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }

.btn {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: transparent;
  color: inherit;
  border-radius: 999px;
  padding: 7px 14px;
  font: 500 13px var(--sans);
  cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: rgba(255, 255, 255, 0.5); }
.btn:disabled { opacity: 0.4; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover:not(:disabled) { filter: brightness(1.08); border-color: var(--accent); }
.btn.ghost { border-color: transparent; color: #c8c3b8; }
.btn:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

.switch { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: #c8c3b8; cursor: pointer; margin-right: 6px; }
.switch input { accent-color: var(--accent); }

.error {
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--err-bg);
  color: var(--err-ink);
  font-size: 14px;
}
.error code { font: 600 12px var(--mono); }

/* Form ------------------------------------------------------------------- */

form { display: grid; gap: 18px; }

fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
legend { padding: 0; }

.layout-row {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 14px 24px;
}
.layout-row > legend {
  float: left;
  width: 100%;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.segmented {
  display: inline-flex;
  flex-wrap: wrap;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 3px;
  gap: 3px;
}
.segmented label { position: relative; cursor: pointer; }
.segmented input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.segmented span {
  display: block;
  padding: 7px 14px;
  border-radius: 7px;
  font-weight: 600;
  font-size: 14px;
  color: var(--ink-2);
  transition: background 0.12s, color 0.12s;
}
.segmented small { display: block; font-weight: 400; font-size: 11px; color: var(--ink-3); }
.segmented input:checked + span { background: var(--card); color: var(--ink); box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12), inset 0 -2px 0 var(--accent); }
.segmented input:focus-visible + span { outline: 2px solid var(--focus); }
.segmented.small span { padding: 5px 10px; font-size: 13px; }

.wings { display: flex; flex-wrap: wrap; gap: 12px; font-size: 13px; color: var(--ink-2); }
.wings label { display: inline-flex; align-items: center; gap: 6px; }
.wings input {
  width: 84px;
  padding: 7px 9px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--card);
  color: var(--ink);
  font: 13px var(--mono);
}

.fields {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
@media (max-width: 900px) { .fields { grid-template-columns: 1fr; } }

.field {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 14px 16px 16px;
  display: grid;
  gap: 12px;
}
.field legend {
  float: left;
  width: 100%;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-2);
}
.field-no {
  font: 600 12px var(--mono);
  color: var(--accent);
}
.field .text {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--rule);
  border-radius: 9px;
  background: var(--paper);
  color: var(--ink);
  font: 600 20px/1.2 "Zecer UI", var(--sans);
}
.field.invalid .text { border-color: var(--accent); }
.field-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.field select {
  padding: 6px 8px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  font: 13px var(--sans);
}
.toggles { display: inline-flex; gap: 4px; }
.toggle { position: relative; cursor: pointer; }
.toggle input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.toggle span {
  display: grid;
  place-items: center;
  width: 32px;
  height: 30px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  font: 15px Georgia, serif;
  color: var(--ink-2);
}
.toggle input:checked + span { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.toggle input:disabled + span { opacity: 0.35; cursor: not-allowed; }
.toggle input:focus-visible + span { outline: 2px solid var(--focus); }

/* Report ----------------------------------------------------------------- */

.report h2 {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.report h2:not(:first-child) { margin-top: 20px; }

.warnings { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.warnings li { padding: 8px 12px; border-radius: 8px; font-size: 14px; }
.warnings li.ok { color: var(--ink-3); padding-left: 0; }
.warnings li.warn { background: var(--warn-bg); color: var(--warn-ink); }
.warnings li.info { background: var(--info-bg); color: var(--info-ink); }
.warnings code { font: 600 12px var(--mono); margin-right: 6px; }

.table-wrap { overflow-x: auto; border: 1px solid var(--rule); border-radius: 12px; background: var(--card); }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 9px 12px; text-align: left; white-space: nowrap; border-bottom: 1px solid var(--rule); }
th { font-weight: 600; color: var(--ink-3); font-size: 12px; }
tbody tr:last-child td { border-bottom: 0; }
td.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
td .muted { color: var(--ink-3); }
.tag { display: inline-block; padding: 1px 7px; border-radius: 999px; background: var(--paper-2); font: 600 11px var(--mono); }
.tag.p { background: var(--accent); color: var(--accent-ink); }

@media (max-width: 600px) {
  .version { display: none; }
  .segmented span { padding: 6px 10px; }
}