:root {
  --paper: #e4dfd2;
  --paper-2: #efe9db;
  --ink: #1c1714;
  --ink-soft: #4a433c;
  --rule: #8f8678;
  --rule-soft: color-mix(in srgb, var(--rule) 45%, transparent);
  --press: #c4452b;
  --press-ink: #fff6ee;
  --sheet: #f6f1e6;
  --ticket: #ebe4d4;
  --shadow: 0 18px 50px rgba(28, 23, 20, 0.12);
  --font-ui: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-display: "Bricolage Grotesque", "Noto Sans SC", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --radius: 2px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

html[data-theme="dark"] {
  --paper: #12161a;
  --paper-2: #181e24;
  --ink: #efe8db;
  --ink-soft: #c4b9a8;
  --rule: #5b6670;
  --sheet: #1c2328;
  --ticket: #171d22;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --press: #e05a3c;
  --press-ink: #1a0d0a;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-ui);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 12% -10%, color-mix(in srgb, var(--press) 14%, transparent), transparent 50%),
    linear-gradient(180deg, var(--paper-2), var(--paper));
  letter-spacing: 0.01em;
  line-height: 1.5;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 8;
  opacity: 0.18;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}

html[data-theme="dark"] .grain {
  mix-blend-mode: overlay;
  opacity: 0.22;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -40px;
  background: var(--ink);
  color: var(--sheet);
  padding: 8px 12px;
  z-index: 20;
}

.skip-link:focus {
  top: 12px;
}

.masthead,
.bench,
.colophon {
  width: min(1180px, calc(100% - 32px));
  margin-inline: auto;
}

.masthead {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 14px 0 12px;
  border-bottom: 1px solid var(--rule-soft);
}

.eyebrow {
  margin: 0 0 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

h1 {
  margin: 0;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
}

.title-primary {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: clamp(20px, 2.2vw, 26px);
  letter-spacing: 0.06em;
  line-height: 1.15;
}

.title-secondary {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(14px, 1.6vw, 18px);
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--press);
}

html[lang="en"] .title-primary {
  font-family: var(--font-display);
  letter-spacing: -0.04em;
}

html[lang="en"] .title-secondary {
  font-family: var(--font-ui);
  letter-spacing: 0.1em;
  font-size: 12px;
  font-weight: 500;
}

.lede {
  margin: 4px 0 0;
  max-width: 56ch;
  color: var(--ink-soft);
  font-size: 12px;
}

.mast-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  flex-shrink: 0;
}

.seg {
  display: inline-flex;
  border: 1px solid var(--rule);
  background: color-mix(in srgb, var(--ticket) 80%, transparent);
}

.seg-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  font: 500 12px/1 var(--font-ui);
  padding: 5px 9px;
  min-height: 30px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.seg-btn + .seg-btn,
.seg-btn + label.seg-btn {
  border-left: 1px solid var(--rule-soft);
}

.seg-btn[aria-pressed="true"],
.stock-seg .seg-btn:has(input:checked) {
  background: var(--ink);
  color: var(--sheet);
}

.stock-seg .seg-btn input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.stock-seg {
  width: 100%;
}

.stock-seg .seg-btn {
  flex: 1;
  position: relative;
}

.bench {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 20px;
  padding: 16px 0 32px;
}

.proof {
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: sticky;
  top: 12px;
}

.sheet {
  position: relative;
  background: var(--sheet);
  box-shadow: var(--shadow);
  padding: 14px 12px 10px;
}

.sheet[data-bg="transparent"] {
  background-color: #d7d0c2;
  background-image:
    linear-gradient(45deg, #cfc6b5 25%, transparent 25%),
    linear-gradient(-45deg, #cfc6b5 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #cfc6b5 75%),
    linear-gradient(-45deg, transparent 75%, #cfc6b5 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
}

html[data-theme="dark"] .sheet[data-bg="transparent"] {
  background-color: #24303a;
  background-image:
    linear-gradient(45deg, #1b242c 25%, transparent 25%),
    linear-gradient(-45deg, #1b242c 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #1b242c 75%),
    linear-gradient(-45deg, transparent 75%, #1b242c 75%);
}

.crop {
  position: absolute;
  width: 18px;
  height: 18px;
  border: 0 solid var(--ink);
}

.crop.tl { top: 8px; left: 8px; border-top-width: 1px; border-left-width: 1px; }
.crop.tr { top: 8px; right: 8px; border-top-width: 1px; border-right-width: 1px; }
.crop.bl { bottom: 8px; left: 8px; border-bottom-width: 1px; border-left-width: 1px; }
.crop.br { bottom: 8px; right: 8px; border-bottom-width: 1px; border-right-width: 1px; }

.reg-mark {
  position: absolute;
  top: 10px;
  left: 50%;
  width: 14px;
  height: 14px;
  translate: -50% 0;
  background:
    linear-gradient(var(--press), var(--press)) center/14px 1px no-repeat,
    linear-gradient(var(--press), var(--press)) center/1px 14px no-repeat;
  border: 1px solid var(--press);
  border-radius: 50%;
}

.stage {
  display: grid;
  place-items: center;
}

#venn {
  width: min(100%, 640px);
  height: auto;
  display: block;
}

.export-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-press {
  appearance: none;
  border: 0;
  background: var(--press);
  color: var(--press-ink);
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.04em;
  font-size: 14px;
  padding: 10px 16px;
  min-height: 40px;
  cursor: pointer;
  box-shadow: 4px 4px 0 var(--ink);
  transition: translate 160ms var(--ease), box-shadow 160ms var(--ease);
}

.btn-press:hover {
  translate: 1px 1px;
  box-shadow: 3px 3px 0 var(--ink);
}

.btn-press:active {
  translate: 4px 4px;
  box-shadow: 0 0 0 var(--ink);
}

.btn-press:focus-visible,
.seg-btn:focus-visible,
.preset-btn:focus-visible,
.repo-link:focus-visible,
input:focus-visible {
  outline: 2px solid var(--press);
  outline-offset: 2px;
}

.hint,
.colophon {
  font-size: 12px;
  color: var(--ink-soft);
}

.hint {
  margin: 0;
}

.ticket {
  background: var(--ticket);
  border: 1px solid var(--rule);
  padding: 0 12px 10px;
  align-self: start;
}

fieldset {
  border: 0;
  border-top: 1px solid var(--rule-soft);
  margin: 0;
  padding: 8px 0 4px;
}

legend {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  padding: 0 8px 0 0;
  color: var(--ink-soft);
}

.venn-fields {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-areas:
    ". top ."
    "ab center ac"
    "left bc right";
  gap: 6px;
  margin-bottom: 8px;
}

.area-top { grid-area: top; }
.area-ab { grid-area: ab; }
.area-center { grid-area: center; }
.area-ac { grid-area: ac; }
.area-left { grid-area: left; }
.area-bc { grid-area: bc; }
.area-right { grid-area: right; }

.field {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.field span,
.check span {
  font-size: 10px;
  color: var(--ink-soft);
}

.field input[type="text"],
.field textarea,
.hex {
  width: 100%;
  border: 1px solid var(--rule);
  background: var(--sheet);
  color: var(--ink);
  font: 500 13px/1.3 var(--font-ui);
  padding: 5px 8px;
  min-height: 32px;
  border-radius: var(--radius);
}

.field textarea {
  resize: none;
  overflow: hidden;
  field-sizing: content;
}

.hex {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--press);
  height: 28px;
}

input[type="color"] {
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--rule);
  background: var(--sheet);
  cursor: pointer;
}

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

.row {
  display: flex;
  gap: 12px;
  align-items: end;
}

.grow {
  flex: 1;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 28px;
  margin: 2px 0;
  cursor: pointer;
}

.check input {
  width: 16px;
  height: 16px;
  accent-color: var(--press);
}

.presets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 8px;
}

.preset-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  text-align: left;
  border: 1px solid var(--rule);
  background: var(--sheet);
  color: var(--ink);
  padding: 6px 8px;
  min-height: 34px;
  cursor: pointer;
  font: 500 12px/1.2 var(--font-ui);
}

.preset-btn.is-active {
  border-color: var(--ink);
  box-shadow: inset 3px 0 0 var(--press);
}

.preset-dots {
  display: flex;
  gap: 4px;
}

.preset-dots i {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  display: block;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.18);
}

.ink-grid {
  display: grid;
  gap: 6px;
}

.colophon {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 20px;
  padding: 16px 0 40px;
  border-top: 1px solid var(--rule-soft);
}

.colophon p {
  margin: 0;
}

.repo-link {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--press);
}

.repo-link:hover {
  color: var(--press);
}

@media (max-width: 900px) {
  .masthead,
  .bench {
    display: flex;
    flex-direction: column;
  }

  .mast-actions {
    justify-content: flex-start;
  }

  .ticket {
    width: 100%;
  }

  .proof {
    position: static;
  }

  .export-row {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 560px) {
  .sheet {
    padding: 12px 8px 8px;
  }

  .venn-fields {
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "top top"
      "left right"
      "ab ac"
      "bc center";
  }

  .row {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn-press {
    transition: none;
  }
}