@font-face { font-family: "Lexend"; src: url("fonts/lexend-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Lexend"; src: url("fonts/lexend-latin-600-normal.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Caveat"; src: url("fonts/caveat-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-display: swap; unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Caveat"; src: url("fonts/caveat-latin-ext-400-normal.woff2") format("woff2"); font-weight: 400; font-display: swap; unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }

:root {
  --paper: #efe9dd;
  --plate: #fbf8f1;
  --ink: #161312;
  --muted: #5b554f;
  --forest: #2f4b3c;
  --gold: #eec355;
  --rust: #bd5a2a;
  --line: #d8ccb7;
  --gutter: 16px;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; overflow: hidden; }
body {
  background: var(--paper);
  color: var(--ink);
  font: 400 15px/1.45 "Lexend", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
#scene { position: fixed; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; }

/* Masthead */
.masthead {
  position: fixed; top: var(--gutter); left: var(--gutter);
  display: flex; gap: 14px; align-items: center;
  max-width: min(520px, calc(100% - 2 * var(--gutter)));
  pointer-events: none;
}
.mark { width: 64px; height: auto; opacity: .9; flex: none; }
.masthead h1 { margin: 0; font: 400 40px/1 "Caveat", cursive; letter-spacing: .5px; }
.masthead .sub { margin: 4px 0 0; color: var(--muted); font-size: 13.5px; max-width: 40ch; }

/* Field note: build step caption */
.note {
  position: fixed; top: calc(var(--gutter) + 6px); right: var(--gutter);
  width: min(340px, calc(100% - 2 * var(--gutter)));
  background: var(--plate);
  border: 1px solid var(--line);
  border-left: 4px solid var(--gold);
  border-radius: 4px 12px 12px 4px;
  padding: 12px 16px 14px;
  box-shadow: 0 10px 30px -18px rgba(22, 19, 18, .45);
}
.note-count { margin: 0; font-size: 12.5px; color: var(--muted); }
.note-title { margin: 2px 0 4px; font: 400 30px/1.05 "Caveat", cursive; color: var(--forest); }
.note-text { margin: 0; font-size: 14px; }

/* Control dock */
.dock {
  position: fixed; left: 50%; bottom: calc(var(--gutter) + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  display: flex; align-items: flex-end; gap: 22px;
  background: var(--plate);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px 18px 14px;
  box-shadow: 0 14px 40px -24px rgba(22, 19, 18, .55);
  max-width: calc(100% - 2 * var(--gutter));
}
.group { display: flex; flex-direction: column; gap: 6px; }
.group-label { font-size: 12.5px; color: var(--muted); }

button { font: inherit; color: inherit; cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .45; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }

.seg { display: inline-flex; border: 1px solid var(--ink); border-radius: 999px; padding: 3px; gap: 2px; }
.seg button {
  border: 0; background: transparent; border-radius: 999px;
  padding: 6px 16px; font-weight: 600; font-size: 14px;
}
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--plate); }

.btn {
  border: 1px solid var(--ink); background: transparent; border-radius: 999px;
  padding: 7px 16px; font-weight: 600; font-size: 14px; white-space: nowrap;
  min-width: 128px;
}
.btn[aria-pressed="true"] { background: var(--gold); border-color: var(--gold); }
.btn-primary { background: var(--forest); border-color: var(--forest); color: var(--plate); }
.btn-primary[aria-pressed="true"] { background: var(--rust); border-color: var(--rust); color: var(--plate); }

.group-layers { width: 300px; }
input[type="range"] { width: 100%; margin: 4px 0 0; accent-color: var(--forest); }
.stops { display: flex; justify-content: space-between; margin-top: -2px; }
.stops button {
  border: 0; background: none; padding: 2px 0; font-size: 12px; color: var(--muted);
  flex: 1; text-align: center;
}
.stops button:first-child { text-align: left; }
.stops button:last-child { text-align: right; }
.stops button.on { color: var(--ink); font-weight: 600; }

.legend {
  position: fixed; right: var(--gutter); bottom: calc(var(--gutter) + 112px);
  margin: 0; font-size: 12.5px; color: var(--muted);
  display: flex; gap: 8px; align-items: center; max-width: 260px;
}
.swatch { width: 18px; height: 12px; flex: none; border: 1.5px solid var(--rust); background: rgba(189, 90, 42, .35); border-radius: 2px; }

.loading {
  position: fixed; inset: 0; display: grid; place-content: center; justify-items: center; gap: 10px;
  background: var(--paper); transition: opacity .5s ease;
}
.loading img { width: 120px; height: auto; }
.loading p { margin: 0; font: 400 28px/1 "Caveat", cursive; }
.loading.done { opacity: 0; pointer-events: none; }

@media (max-width: 860px) {
  .masthead h1 { font-size: 32px; }
  .masthead .sub { font-size: 12.5px; }
  .mark { width: 48px; }
  .dock {
    left: var(--gutter); right: var(--gutter); transform: none; max-width: none;
    display: grid; grid-template-columns: auto 1fr; gap: 10px 16px; padding: 10px 14px 12px;
  }
  .group-layers { width: auto; grid-column: 1 / -1; order: 3; }
  .group-play { grid-column: 1 / -1; order: 4; }
  .group-play .btn { width: 100%; }
  .btn { min-width: 0; }
  .legend { left: var(--gutter); right: auto; bottom: auto; top: 96px; max-width: 220px; }
  .note { top: auto; bottom: 236px; right: var(--gutter); left: var(--gutter); width: auto; }
}

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