:root {
  --bg: #ebebe8;        /* app / panel surface */
  --paper: #fafaf8;     /* cards */
  --paper-2: #f1f1ee;
  --ink: #16160f;       /* near-black text */
  --muted: #8b8b84;     /* gray */
  --line: #d3d3cc;      /* hairlines */
  --line-2: #c2c2ba;
  --accent: #ff5a1f;    /* orange */
  --accent-ink: #ffffff;
  --font: "Futura", "Futura PT", "Avenir Next", "Century Gothic", -apple-system,
          BlinkMacSystemFont, "Segoe UI", sans-serif;
  --r: 3px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0;
  overflow: hidden;
}

#app {
  display: grid;
  grid-template-columns: 1fr 348px;
  height: 100vh;
}

/* ---------- stage / canvas ---------- */
#stage {
  position: relative;
  overflow: hidden;
  background: var(--paper);
  border-right: 1px solid var(--line);
}
#canvas { display: block; width: 100%; height: 100%; }

/* technical corner brackets */
.corner {
  position: absolute;
  width: 22px; height: 22px;
  pointer-events: none;
  z-index: 3;
  --c: var(--ink);
}
.corner.tl { top: 18px; left: 18px; border-top: 1.5px solid var(--c); border-left: 1.5px solid var(--c); }
.corner.tr { top: 18px; right: 18px; border-top: 1.5px solid var(--c); border-right: 1.5px solid var(--c); }
.corner.bl { bottom: 18px; left: 18px; border-bottom: 1.5px solid var(--c); border-left: 1.5px solid var(--c); }
.corner.br { bottom: 18px; right: 18px; border-bottom: 1.5px solid var(--c); border-right: 1.5px solid var(--c); }
#stage.dark .corner { --c: #f3f3ee; }

#overlay {
  position: absolute;
  top: 30px;
  left: 36px;
  z-index: 3;
  pointer-events: none;
  user-select: none;
}
#title {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 0.4px;
  color: var(--ink);
}
#subtitle {
  font-size: 11px;
  text-transform: lowercase;
  letter-spacing: 0.4px;
  color: var(--muted);
  margin-top: 4px;
}
#stage.dark #title { color: #f3f3ee; }

#readout {
  position: absolute;
  bottom: 30px;
  left: 36px;
  z-index: 3;
  font-size: 10.5px;
  text-transform: lowercase;
  letter-spacing: 0.2px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  pointer-events: none;
}
#readout b { color: var(--ink); font-weight: 600; }
#stage.dark #readout { color: #b9b9b1; }
#stage.dark #readout b { color: #f3f3ee; }

/* ---------- panel ---------- */
#panel {
  background: var(--bg);
  overflow-y: auto;
  padding: 22px 20px 30px;
}
#panel::-webkit-scrollbar { width: 9px; }
#panel::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 8px; }

.panel-head .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.4px;
}
.panel-head .brand .dot {
  width: 12px; height: 12px;
  background: var(--accent);
  border-radius: 2px;
  display: inline-block;
}
.panel-head p {
  margin: 5px 0 0;
  font-size: 10.5px;
  text-transform: lowercase;
  letter-spacing: 0.2px;
  color: var(--muted);
}

.group {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.group h2 {
  font-size: 10.5px;
  text-transform: lowercase;
  letter-spacing: 0.4px;
  color: var(--muted);
  margin: 0 0 12px;
  font-weight: 600;
}
.group-head { display: flex; align-items: center; justify-content: space-between; }
.group-head h2 { margin-bottom: 0; }
.hint {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.55;
  margin: 10px 0 12px;
  text-transform: lowercase;
}

/* stage cards */
.stage-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 13px;
  margin-bottom: 10px;
}
.stage-card .stage-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.stage-card .stage-title > span:first-child {
  font-size: 11px;
  font-weight: 600;
  text-transform: lowercase;
  letter-spacing: 0.2px;
}
.stage-card .badge {
  font-size: 9px;
  text-transform: lowercase;
  letter-spacing: 0.2px;
  color: var(--muted);
  border: 1px solid var(--line-2);
  border-radius: 2px;
  padding: 2px 7px;
}

/* fields / sliders */
.field { margin-bottom: 12px; }
.field-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 7px;
}
.field-name {
  font-size: 10px;
  text-transform: lowercase;
  letter-spacing: 0.2px;
  color: var(--muted);
}

/* typable value */
.num {
  width: 58px;
  text-align: right;
  background: transparent;
  border: none;
  border-bottom: 1px solid transparent;
  border-radius: 0;
  color: var(--ink);
  font-family: var(--font);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  padding: 1px 2px;
  transition: border-color .12s;
}
.num:hover { border-bottom-color: var(--line-2); }
.num:focus { outline: none; border-bottom-color: var(--accent); }
.num::-webkit-outer-spin-button,
.num::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.num[type="number"] { -moz-appearance: textfield; appearance: textfield; }

/* the field-level fields (opacity / speed) still use a plain label > span */
.field > span {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  text-transform: lowercase;
  letter-spacing: 0.2px;
  color: var(--muted);
  margin-bottom: 7px;
}
.field em { color: var(--ink); font-style: normal; font-variant-numeric: tabular-nums; }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  background: var(--line-2);
  cursor: pointer;
  border-radius: 2px;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  background: var(--ink);
  border-radius: 50%;
  border: 2px solid var(--paper);
  box-shadow: 0 0 0 1px var(--line-2);
}
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px;
  background: var(--ink);
  border-radius: 50%;
  border: 2px solid var(--paper);
}

/* control rows */
.ctl {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  position: relative;
}
.ctl-label {
  font-size: 10px;
  text-transform: lowercase;
  letter-spacing: 0.2px;
  color: var(--muted);
}

/* segmented toggle (light / dark) */
.seg {
  display: inline-flex;
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  overflow: hidden;
}
.seg button {
  background: var(--paper);
  border: none;
  color: var(--muted);
  font-family: var(--font);
  font-size: 10px;
  text-transform: lowercase;
  letter-spacing: 0.2px;
  padding: 6px 12px;
  cursor: pointer;
}
.seg button + button { border-left: 1px solid var(--line-2); }
.seg button.active { background: var(--accent); color: var(--accent-ink); }

/* toggle switch */
.switch {
  width: 40px; height: 22px;
  border-radius: 20px;
  background: var(--line-2);
  border: none;
  position: relative;
  cursor: pointer;
  padding: 0;
  transition: background .16s;
}
.switch .knob {
  position: absolute;
  top: 3px; left: 3px;
  width: 16px; height: 16px;
  background: #fff;
  border-radius: 50%;
  transition: transform .16s;
  box-shadow: 0 1px 2px rgba(0,0,0,.25);
}
.switch.on { background: var(--accent); }
.switch.on .knob { transform: translateX(18px); }

/* color swatch + wheel */
.swatch {
  width: 30px; height: 22px;
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  cursor: pointer;
  padding: 0;
}
.swatch-ctl { flex-wrap: wrap; }
.wheel-pop {
  width: 100%;
  margin-top: 10px;
  padding: 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r);
}
.wheel-pop[hidden] { display: none; }
.wheel-wrap {
  position: relative;
  width: 150px; height: 150px;
  margin: 0 auto 12px;
  touch-action: none;
}
.wheel-disc { width: 150px; height: 150px; border-radius: 50%; display: block; }
.wheel-marker {
  position: absolute;
  width: 14px; height: 14px;
  border: 2px solid #fff;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 0 1px rgba(0,0,0,.5);
  pointer-events: none;
}
.wheel-light { margin-bottom: 10px; }
.wheel-hex input {
  width: 100%;
  background: var(--paper-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  padding: 6px 8px;
  font-family: var(--font);
  font-size: 12px;
  letter-spacing: 0.2px;
  color: var(--ink);
  text-align: center;
  text-transform: lowercase;
}

/* buttons */
.btn, .mini {
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  padding: 9px 10px;
  font-family: var(--font);
  font-size: 10.5px;
  text-transform: lowercase;
  letter-spacing: 0.2px;
  cursor: pointer;
  transition: border-color .14s, background .14s, color .14s, transform .05s;
}
.btn:hover, .mini:hover { border-color: var(--accent); color: var(--accent); }
.btn:active, .mini:active { transform: translateY(1px); }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}
.btn.primary:hover { filter: brightness(1.06); color: var(--accent-ink); }
.btn:disabled { opacity: 0.4; cursor: default; }
.btn:disabled:hover { border-color: var(--line-2); color: var(--ink); }
.mini {
  width: 26px; height: 26px;
  padding: 0;
  font-size: 16px;
  line-height: 1;
}
.action-row {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}
.btn.big {
  flex: 1;
  padding: 16px 12px;
  font-size: 13px;
  letter-spacing: 0.5px;
  border-radius: var(--r);
}

.row-buttons { display: flex; gap: 8px; }
.row-buttons.wide { margin-top: 8px; }
.row-buttons.wide .btn { flex: 1; }

.presets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 10px;
}
.presets .btn { text-align: center; }

.panel-foot {
  margin-top: 24px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}
.panel-foot p {
  font-size: 10px;
  text-transform: lowercase;
  letter-spacing: 0.2px;
  color: var(--muted);
  margin: 3px 0;
  line-height: 1.6;
}
.panel-foot strong { color: var(--ink); }

@media (max-width: 860px) {
  #app { grid-template-columns: 1fr; grid-template-rows: 1fr auto; }
  #stage { border-right: none; border-bottom: 1px solid var(--line); }
  #panel { max-height: 46vh; }
}