:root {
  --bg: #14160f;
  --bg-2: #1b1e16;
  --ink: #ece7d4;
  --muted: #9a957f;
  --line: #35382c;
  --moss: #b7d36a;
  --moss-dim: #6d8440;
  --lantern: #e0a45a;
  --danger: #d37a5a;
  --block: #8ea15a;
  --block-edge: #c6d98a;
  --empty: #22251c;
  --seal: #b94235;
  --font: "IBM Plex Sans", "Helvetica Neue", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --display: "Syne", "IBM Plex Sans", sans-serif;
}

* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(20,22,15,0.92), rgba(20,22,15,0.97)),
    repeating-linear-gradient(0deg, transparent 0 31px, var(--line) 31px 32px),
    repeating-linear-gradient(90deg, transparent 0 31px, var(--line) 31px 32px),
    var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
}

a { color: var(--moss); }
a:hover { color: var(--block-edge); }
.skip {
  position: absolute;
  left: -999px;
  top: 0;
}
.skip:focus {
  left: 12px;
  top: 12px;
  background: var(--bg-2);
  padding: 8px 12px;
  z-index: 20;
}

.wrap {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0 14px;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  text-decoration: none;
  color: var(--ink);
}
.brand-logo {
  display: block;
  width: min(200px, 56vw);
  height: auto;
}
.brand .tagline {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.3;
  margin-left: 42px;
}
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-size: 14px;
}
.nav a {
  color: var(--muted);
  text-decoration: none;
}
.nav a[aria-current="page"],
.nav a:hover {
  color: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 32px;
  padding: 48px 0 28px;
}
.kicker {
  color: var(--lantern);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
h1, h2, h3 { font-family: var(--display); font-weight: 700; letter-spacing: -0.04em; }
h1 { font-size: clamp(32px, 5vw, 48px); line-height: 1.05; margin: 8px 0 14px; }
.hero h1 { font-size: clamp(36px, 6vw, 64px); line-height: 0.95; }
.panel h1 {
  font-size: 28px;
  line-height: 1.08;
  overflow-wrap: anywhere;
  max-width: 100%;
}
h2 { font-size: 28px; margin: 0 0 10px; }
h3 { font-size: 18px; margin: 0 0 8px; }
.lede { color: var(--muted); max-width: 46ch; }
.prose-page { max-width: 62ch; padding-top: 36px; }

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  padding-bottom: 48px;
}
.tool-card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  padding: 18px;
  text-decoration: none;
  color: inherit;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.tool-card:hover { border-color: var(--moss-dim); }
.tool-card small { color: var(--muted); font-family: var(--mono); font-size: 12px; }
.tool-card p { margin: 10px 0 0; color: var(--muted); }

.layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  padding: 28px 0 56px;
}
.layout > * { min-width: 0; }
.panel {
  background: var(--bg-2);
  border: 1px solid var(--line);
  padding: 16px;
  position: sticky;
  top: 12px;
  align-self: start;
}
label,
.label-like { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 6px; }
textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 8px 10px;
  font-family: var(--mono);
  font-size: 12px;
  resize: vertical;
}
input, select, button, textarea {
  font: inherit;
  color: var(--ink);
}
input[type="number"],
input[type="text"],
select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 8px 10px;
}
input:focus, select:focus, button:focus-visible {
  outline: 2px solid var(--moss);
  outline-offset: 2px;
}
.row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.toggle {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}
.toggle button,
.btn {
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 8px 10px;
  cursor: pointer;
}
.toggle button[aria-pressed="true"],
.btn.primary {
  background: var(--moss);
  color: #16180f;
  border-color: var(--moss);
}
.btn { margin-top: 12px; }
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.stat {
  border: 1px solid var(--line);
  background: var(--bg-2);
  padding: 12px;
}
.stat b {
  display: block;
  font-family: var(--mono);
  font-weight: 600;
  font-size: clamp(15px, 4vw, 21px);
  overflow-wrap: break-word;
  text-wrap: balance;
}
.stat span { color: var(--muted); font-size: 12px; }
.stage {
  border: 1px solid var(--line);
  background: #10120c;
  overflow: auto;
  padding: 12px;
  touch-action: manipulation;
}
canvas {
  image-rendering: pixelated;
  display: block;
  margin: 0 auto;
  max-width: 100%;
}
.rows {
  margin-top: 16px;
  font-family: var(--mono);
  font-size: 13px;
  overflow: auto;
}
.rows table { width: 100%; border-collapse: collapse; }
.rows th, .rows td {
  text-align: left;
  padding: 6px 8px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.note, .faq, .prose {
  color: var(--muted);
  padding-bottom: 48px;
}
.faq details {
  border-top: 1px solid var(--line);
  padding: 12px 0;
}
.faq summary { cursor: pointer; color: var(--ink); }
.alert {
  border: 1px solid var(--danger);
  color: #f0c2b0;
  padding: 10px 12px;
  margin: 8px 0;
  display: none;
}
.alert.show { display: block; }
.copy-ok { color: var(--moss); font-size: 13px; min-height: 1.2em; }
.site-footer {
  border-top: 1px solid var(--line);
  padding: 20px 0 32px;
  color: var(--muted);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.build-bar {
  position: sticky;
  bottom: 0;
  z-index: 5;
  margin-top: 12px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  padding: 12px;
}
.build-bar strong {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 18px;
  display: block;
}
.build-bar p { margin: 6px 0 10px; color: var(--muted); }
.build-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.rows caption {
  text-align: left;
  color: var(--muted);
  font-family: var(--font);
  padding-bottom: 8px;
}
.rows tr { cursor: pointer; }
.rows tr:focus-visible { outline: 2px solid var(--moss); outline-offset: -2px; }
.rows tr.current td { background: #2a3320; }
.rows tr.done td { color: var(--muted); text-decoration: line-through; }
input:disabled { opacity: 0.45; cursor: not-allowed; }

@media (max-width: 860px) {
  .hero, .layout, .tool-grid { grid-template-columns: 1fr; }
  .layout > .preview { order: 1; }
  .layout > .panel { order: 2; }
  .stats { grid-template-columns: 1fr 1fr; }
  .panel { position: static; }
  .site-header { flex-direction: column; align-items: flex-start; }
  canvas { height: auto; }
  .build-bar {
    position: sticky;
    bottom: 0;
    box-shadow: 0 -12px 32px rgba(0, 0, 0, 0.45);
  }
}