/* ==========================================================================
   Sandpainter — dark atelier
   ========================================================================== */
:root {
  --ink: #0e0d0b;
  --ink-2: #131210;
  --plate: #171614;
  --plate-2: #1d1b18;
  --line: #2a2825;
  --line-2: #3a3731;
  --text: #ece5d8;
  --muted: #8f877a;
  --faint: #5b554c;
  --amber: #f5a524;
  --amber-2: #ffc45c;
  --ember: #ff6a1a;
  --danger: #ff5c4d;
  --frame: #0a0908;
  --radius: 10px;
  --font-display: 'Fraunces', 'Iowan Old Style', Georgia, serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'Cascadia Mono', Menlo, monospace;
  --shadow: 0 30px 80px -30px rgba(0, 0, 0, .9), 0 0 0 1px rgba(245, 165, 36, .08);
  --topbar: 60px;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --ink: #f1ebdf;
    --ink-2: #ebe4d6;
    --plate: #e6dece;
    --plate-2: #ddd4c2;
    --line: #d2c8b4;
    --line-2: #bfb39c;
    --text: #2a2622;
    --muted: #6f675c;
    --faint: #a49a8a;
    --amber: #c9780a;
    --amber-2: #e8951f;
    --shadow: 0 30px 60px -30px rgba(60, 40, 10, .45), 0 0 0 1px rgba(201, 120, 10, .12);
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --ink: #f1ebdf; --ink-2: #ebe4d6; --plate: #e6dece; --plate-2: #ddd4c2; --line: #d2c8b4; --line-2: #bfb39c;
  --text: #2a2622; --muted: #6f675c; --faint: #a49a8a; --amber: #c9780a; --amber-2: #e8951f;
  --shadow: 0 30px 60px -30px rgba(60, 40, 10, .45), 0 0 0 1px rgba(201, 120, 10, .12);
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 70% -10%, rgba(245, 165, 36, .07), transparent 60%),
    radial-gradient(800px 500px at -10% 110%, rgba(255, 106, 26, .05), transparent 60%),
    var(--ink);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* grain */
.grain {
  position: fixed; inset: -50%; z-index: 40; pointer-events: none;
  opacity: .06; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 240px 240px;
}

/* --------------------------------------------------------------------------
   top bar
   -------------------------------------------------------------------------- */
.topbar {
  height: var(--topbar);
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 20px;
  padding: 0 22px 0 24px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(to bottom, rgba(255,255,255,.015), transparent);
}
.brand { display: flex; align-items: baseline; gap: 14px; min-width: 0; }
.wordmark {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 26px;
  letter-spacing: -.01em;
  line-height: 1;
  font-variation-settings: 'opsz' 144;
}
.wordmark em { font-style: italic; color: var(--amber); font-weight: 300; }
.tagline { margin: 0; color: var(--muted); font-size: 11.5px; letter-spacing: .04em; text-transform: lowercase; }
.stats { color: var(--muted); font-size: 11.5px; letter-spacing: .04em; font-variant-numeric: tabular-nums; display: flex; gap: 8px; }
.stats .dot { color: var(--faint); }
.iconbtn {
  width: 30px; height: 30px; border-radius: 50%;
  border: 1px solid var(--line-2); background: transparent; color: var(--muted);
  font: 500 13px var(--font-mono); cursor: pointer;
  transition: color .15s, border-color .15s, transform .15s;
}
.iconbtn:hover { color: var(--amber); border-color: var(--amber); transform: translateY(-1px); }

/* --------------------------------------------------------------------------
   stage
   -------------------------------------------------------------------------- */
.stage {
  height: calc(100% - var(--topbar));
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr) 256px;
  gap: 22px;
  padding: 18px 22px 20px;
}

.tray, .rail {
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--line-2) transparent;
  padding-right: 4px;
}

/* tray */
.group { margin-bottom: 18px; animation: rise .6s cubic-bezier(.2,.7,.2,1) both; animation-delay: calc(var(--i, 0) * 70ms + 80ms); }
.group h2, .ctl h2 {
  margin: 0 0 8px;
  font: 500 10.5px var(--font-mono);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex; align-items: center; gap: 8px;
}
.group h2::after, .ctl h2::after { content: ''; flex: 1; height: 1px; background: var(--line); }
.ctl h2 kbd { order: 3; }

.swatches { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.swatch {
  display: grid; grid-template-columns: 12px 1fr auto; align-items: center; gap: 8px;
  padding: 7px 8px 7px 9px;
  background: var(--plate);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font: 500 12px var(--font-mono);
  text-align: left;
  cursor: pointer;
  transition: transform .15s, border-color .15s, background .15s, box-shadow .15s;
}
.swatch .chip {
  width: 12px; height: 12px; border-radius: 50%;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.12), 0 0 0 1px rgba(0,0,0,.4);
}
.swatch .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.swatch kbd, .ctl kbd, .help kbd {
  font: 400 9.5px var(--font-mono);
  color: var(--faint);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 4px;
  line-height: 1.2;
}
.swatch:hover { transform: translateY(-1px); border-color: var(--line-2); background: var(--plate-2); }
.swatch[aria-pressed="true"] {
  border-color: var(--amber);
  box-shadow: 0 0 0 1px var(--amber), 0 0 18px -6px var(--amber);
  background: var(--plate-2);
}
.swatch[aria-pressed="true"] .name { color: var(--amber-2); }
.swatch[aria-pressed="true"] kbd { color: var(--amber); border-color: var(--amber); }

/* plate */
.plate-wrap {
  --spigots-h: 56px; --status-h: 24px; --wrap-gap: 10px;
  display: grid;
  grid-template-rows: var(--spigots-h) minmax(0, 1fr) var(--status-h);
  gap: var(--wrap-gap);
  min-height: 0;
  min-width: 0;
  justify-items: center;
  container-type: size;
}
/* Width comes from whichever runs out first, the column's width or its height, so the grains stay square. */
.plate {
  position: relative;
  aspect-ratio: 4 / 3;
  width: min(100cqw, (100cqh - var(--spigots-h) - var(--status-h) - 2 * var(--wrap-gap)) * 4 / 3);
  max-width: 100%;
  background: var(--frame);
  border-radius: 6px;
  box-shadow: var(--shadow), inset 0 0 0 1px rgba(245,165,36,.10);
  overflow: hidden;
  cursor: none;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}
.plate::after {
  content: ''; position: absolute; inset: 0; pointer-events: none; border-radius: inherit;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.04), inset 0 -40px 60px -50px rgba(0,0,0,.8);
}
#world, #cursor {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
}
#world { image-rendering: pixelated; }
#cursor { pointer-events: none; }

.spigot-bar {
  position: relative;
  width: var(--plate-w, 100%);
  max-width: 100%;
  height: var(--spigots-h);
}
.spigot {
  position: absolute; left: var(--x); top: 0; transform: translateX(-50%);
  display: grid; grid-template-rows: auto auto; gap: 4px; justify-items: center;
  padding: 5px 8px 4px;
  background: var(--plate);
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
  animation: riseX .5s cubic-bezier(.2,.7,.2,1) both;
  animation-delay: calc(var(--i, 0) * 60ms + 200ms);
  transition: opacity .2s;
}
.spigot-head { display: flex; align-items: center; gap: 6px; }
.spigot .chip { width: 10px; height: 10px; border-radius: 50%; box-shadow: 0 0 0 1px rgba(0,0,0,.5); transition: opacity .2s; }
.spigot.off .chip { opacity: .3; }
.spigot select {
  appearance: none; -webkit-appearance: none;
  background: transparent; border: 0; color: var(--text);
  font: 500 12px var(--font-mono); letter-spacing: .02em;
  padding: 2px 16px 2px 4px; border-radius: 4px; cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 8px) 55%, calc(100% - 4px) 55%;
  background-size: 4px 4px; background-repeat: no-repeat;
}
.spigot select:hover { background-color: var(--plate-2); }
.spigot select:focus-visible { outline: 1px solid var(--amber); outline-offset: 2px; border-radius: 3px; }
/* The open list is drawn by the OS (white on Windows) unless the options carry their own colours. */
.spigot select option { background: var(--plate); color: var(--text); }
.rate { display: flex; gap: 3px; align-items: flex-end; height: 22px; }
.rate .off {
  align-self: center; margin-right: 3px;
  height: 16px; padding: 0 6px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line-2); background: transparent; color: var(--muted);
  font: 600 9px/14px var(--font-mono); letter-spacing: .1em; text-transform: uppercase;
  transition: background .18s, color .18s, border-color .18s;
}
.rate .off:hover { border-color: var(--amber); color: var(--text); }
.spigot.off .rate .off { background: var(--amber); border-color: var(--amber); color: var(--ink); }
/* Tall transparent hit area; the visible bar is drawn at its foot. */
.rate .bar {
  position: relative; width: 9px; height: 22px;
  border: 0; padding: 0; background: transparent; cursor: pointer;
}
.rate .bar::before {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0;
  height: calc(3px + var(--n) * 3.6px); border-radius: 1.5px;
  background: var(--line-2);
  transition: background .18s, transform .18s; transform-origin: bottom;
}
.rate .bar:hover::before { transform: scaleY(1.12); background: var(--muted); }
.rate .bar.on::before { background: var(--amber); box-shadow: 0 0 6px -1px var(--amber); }
.rate button:focus-visible { outline: 1px solid var(--amber); outline-offset: 2px; }

.status {
  margin: 0; height: 24px; width: var(--plate-w, 100%); max-width: 100%;
  display: flex; align-items: center; gap: 12px;
  color: var(--muted); font-size: 11.5px; letter-spacing: .02em;
  white-space: nowrap; overflow: hidden;
}
.status b { color: var(--amber-2); font-weight: 600; text-transform: uppercase; letter-spacing: .12em; font-size: 10.5px; }
.status span { overflow: hidden; text-overflow: ellipsis; }
.status em { font-style: normal; color: var(--faint); margin-left: auto; }

/* toast */
.toast {
  position: absolute; left: 50%; bottom: 14px; transform: translate(-50%, 8px);
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px 8px 14px;
  background: color-mix(in srgb, var(--ink-2) 92%, transparent);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  color: var(--text);
  font-size: 12px;
  opacity: 0; transition: opacity .2s, transform .2s;
  backdrop-filter: blur(6px);
  cursor: default;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* paused: the picture dims and a badge says how to resume */
.plate.is-paused #world { filter: saturate(.45) brightness(.7); }
#world { transition: filter .2s; }
.paused-badge {
  position: absolute; top: 14px; left: 50%; transform: translateX(-50%);
  padding: 7px 14px; border-radius: 999px; cursor: pointer;
  background: color-mix(in srgb, var(--ink-2) 90%, transparent);
  border: 1px solid var(--amber); color: var(--amber-2);
  font: 600 12px var(--font-mono); letter-spacing: .12em; text-transform: uppercase;
  box-shadow: 0 6px 24px -8px rgba(0, 0, 0, .8);
}
.paused-badge:hover { background: var(--amber); color: var(--ink); }
.paused-badge[hidden] { display: none; }
.toast button {
  border: 1px solid var(--line-2); background: transparent; color: var(--amber-2);
  font: 500 11px var(--font-mono); padding: 4px 10px; border-radius: 999px; cursor: pointer;
}
.toast button:hover { border-color: var(--amber); }

/* --------------------------------------------------------------------------
   rail
   -------------------------------------------------------------------------- */
.ctl { margin-bottom: 18px; animation: rise .6s cubic-bezier(.2,.7,.2,1) both; }
.ctl:nth-child(1) { animation-delay: 120ms; } .ctl:nth-child(2) { animation-delay: 180ms; }
.ctl:nth-child(3) { animation-delay: 240ms; } .ctl:nth-child(4) { animation-delay: 300ms; }
.ctl:nth-child(5) { animation-delay: 360ms; } .ctl:nth-child(6) { animation-delay: 420ms; }
.ctl:nth-child(7) { animation-delay: 480ms; }

.seg { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--plate); }
.seg button {
  flex: 1; min-width: 0; padding: 7px 0; border: 0; background: transparent; color: var(--muted);
  font: 500 12px var(--font-mono); cursor: pointer; border-right: 1px solid var(--line);
  transition: color .15s, background .15s;
}
.seg button:last-child { border-right: 0; }
.seg button:hover { color: var(--text); background: var(--plate-2); }
.seg button[aria-pressed="true"] { color: var(--ink); background: var(--amber); font-weight: 600; }

.row { display: flex; gap: 6px; }
.btn {
  flex: 1; padding: 8px 10px;
  background: var(--plate); border: 1px solid var(--line); border-radius: 8px;
  color: var(--text); font: 500 12px var(--font-mono); cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  transition: border-color .15s, background .15s, transform .15s, color .15s;
}
.btn:hover:not(:disabled) { border-color: var(--line-2); background: var(--plate-2); transform: translateY(-1px); }
.btn:disabled { opacity: .4; cursor: default; }
.btn.wide { width: 100%; }
.btn.mini { flex: 0 0 auto; padding: 4px 9px; font-size: 11px; }
.btn.danger:hover:not(:disabled) { border-color: var(--danger); color: var(--danger); }
.btn.armed { border-color: var(--danger); color: var(--danger); background: rgba(255, 92, 77, .08); }
.btn .glyph { font-size: 10px; color: var(--amber); }
.btn[data-paused="true"] { border-color: var(--amber); animation: pulse 1.6s ease-in-out infinite; }

.wind { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; margin-top: 8px; color: var(--muted); }
.wind.active { color: var(--text); }
.wind output { min-width: 44px; text-align: right; font-variant-numeric: tabular-nums; color: var(--amber-2); }
.wind:not(.active) output { color: var(--faint); }
input[type="range"] {
  appearance: none; -webkit-appearance: none; width: 100%; height: 18px; background: transparent; margin: 0; cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track { height: 2px; background: linear-gradient(to right, var(--line-2), var(--faint) 50%, var(--line-2)); border-radius: 1px; }
input[type="range"]::-moz-range-track { height: 2px; background: var(--line-2); }
input[type="range"]::-webkit-slider-thumb {
  appearance: none; -webkit-appearance: none; width: 12px; height: 12px; border-radius: 50%; margin-top: -5px;
  background: var(--amber); border: 2px solid var(--ink); box-shadow: 0 0 0 1px var(--amber);
}
input[type="range"]::-moz-range-thumb { width: 10px; height: 10px; border-radius: 50%; background: var(--amber); border: 2px solid var(--ink); }
input[type="range"]:focus-visible { outline: 1px solid var(--amber); outline-offset: 4px; border-radius: 4px; }

.slot { display: grid; grid-template-columns: 1fr auto auto auto; align-items: center; gap: 6px; padding: 5px 0; border-bottom: 1px dashed var(--line); }
.slot:last-child { border-bottom: 0; }
.slot-name { font-weight: 500; }
.slot-time { color: var(--faint); font-size: 11px; margin-right: 4px; }

/* --------------------------------------------------------------------------
   help dialog
   -------------------------------------------------------------------------- */
.help {
  background: var(--plate); color: var(--text);
  border: 1px solid var(--line-2); border-radius: 14px;
  padding: 26px 28px; width: min(92vw, 460px);
  box-shadow: var(--shadow);
}
.help::backdrop { background: rgba(6, 5, 4, .7); backdrop-filter: blur(4px); }
.help h2 { margin: 0 0 8px; font: italic 300 30px var(--font-display); color: var(--amber); letter-spacing: -.01em; }
.help p { margin: 0 0 14px; color: var(--muted); font-size: 12.5px; }
.help table { border-collapse: collapse; width: 100%; margin-bottom: 14px; }
.help td { padding: 5px 0; border-bottom: 1px dashed var(--line); font-size: 12px; }
.help td:first-child { width: 96px; white-space: nowrap; }
.help .fine { font-size: 11.5px; color: var(--faint); }
.help a { color: var(--amber-2); text-underline-offset: 3px; }
.shot { width: min(92vw, 720px); }
.shot img { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; image-rendering: pixelated; border-radius: 6px; background: var(--frame); box-shadow: 0 0 0 1px rgba(245,165,36,.15); margin-bottom: 12px; }
.shot .row .btn { text-decoration: none; }

/* --------------------------------------------------------------------------
   motion
   -------------------------------------------------------------------------- */
@keyframes rise { from { opacity: .5; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes riseX { from { opacity: .5; transform: translate(-50%, 8px); } to { opacity: 1; transform: translate(-50%, 0); } }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(245,165,36,0); } 50% { box-shadow: 0 0 0 4px rgba(245,165,36,.18); } }

:focus-visible { outline: 1px solid var(--amber); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  .group, .ctl, .spigot { animation: none; }
  .btn[data-paused="true"] { animation: none; }
  * { transition-duration: .01ms !important; }
}

/* --------------------------------------------------------------------------
   narrow screens
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  body { overflow: auto; }
  .stage {
    height: auto;
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
    padding: 12px 16px 24px;
  }
  .plate-wrap { order: 1; grid-template-rows: var(--spigots-h) auto var(--status-h); container-type: normal; }
  .plate { height: auto; width: 100%; cursor: default; }
  .tray { order: 2; overflow: visible; padding-right: 0; }
  .group { margin-bottom: 12px; }
  .swatches { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .rail { order: 3; overflow: visible; padding-right: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
  .ctl:nth-child(6) { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .topbar { padding: 0 16px; gap: 12px; }
  .tagline { display: none; }
  .wordmark { font-size: 22px; }
  .rail { grid-template-columns: 1fr; }
  /* Four even columns: absolutely placed chips overlap at this width. */
  .spigot-bar { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 4px; }
  .spigot { position: static; transform: none; animation: none; min-width: 0; padding: 4px 3px 3px; }
  .spigot-head { max-width: 100%; }
  .spigot .chip { display: none; }
  .spigot select { min-width: 0; max-width: 100%; font-size: 11px; padding-right: 13px; }
  .rate { gap: 2px; }
  .rate .off { padding: 0 4px; margin-right: 1px; font-size: 8px; letter-spacing: .04em; }
  .rate .bar { width: 6px; }
}