:root {
  --bg: #0e100d;
  --panel: #161914;
  --panel2: #1e221b;
  --line: #2a3027;
  --text: #d6e6d3;
  --dim: #7f8f7c;
  --green: #7dffa8;
  --amber: #ffb347;
  --red: #ff6b6b;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --retro: "Share Tech Mono", ui-monospace, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  min-height: 100vh;
  background: radial-gradient(1200px 600px at 30% -10%, #1a2218, transparent), var(--bg);
  color: var(--text);
  font: 13px/1.4 var(--mono);
}
button, input, select { font: inherit; color: inherit; }
code { font-family: var(--mono); color: var(--green); font-size: 12px; }

/* ---------- top bar ---------- */
.bar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; flex-wrap: wrap; gap: 10px 22px;
  padding: 10px 18px;
  background: rgba(16, 19, 15, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.logo {
  font-family: var(--retro); font-size: 20px; letter-spacing: 0.14em;
  color: var(--green); text-shadow: 0 0 10px rgba(125, 255, 168, 0.5);
}
.logo span { color: var(--amber); text-shadow: 0 0 10px rgba(255, 179, 71, 0.5); }
.transport, .actions { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 14px; }
.actions { margin-left: auto; }

.btn {
  background: var(--panel2); border: 1px solid var(--line); border-radius: 6px;
  padding: 6px 12px; cursor: pointer; transition: border-color .15s, background .15s;
}
.btn:hover { border-color: #43513f; background: #252b22; }
.btn.play { width: 46px; height: 34px; padding: 0; font-size: 15px; color: var(--green); }
.btn.play.on { background: #1d3a26; border-color: var(--green); box-shadow: 0 0 14px rgba(125, 255, 168, 0.35); }
.field { display: flex; align-items: center; gap: 6px; font-family: var(--retro); color: var(--dim); letter-spacing: 0.08em; }
.field small { font-size: 11px; }
.field input[type=number] {
  width: 62px; background: #0b0d0a; border: 1px solid var(--line); border-radius: 5px;
  padding: 5px 6px; color: var(--green);
}
.pos { font-family: var(--retro); font-size: 16px; color: var(--green); min-width: 150px; white-space: nowrap; }
select { background: #0b0d0a; border: 1px solid var(--line); border-radius: 5px; padding: 5px 6px; }
input[type=range] { accent-color: var(--green); width: 90px; }

/* ---------- layout ---------- */
main {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(380px, 1fr);
  gap: 18px; padding: 18px; align-items: start;
}
.stage { position: sticky; top: 72px; display: flex; flex-direction: column; gap: 12px; }
@media (max-width: 1000px) {
  main { grid-template-columns: minmax(0, 1fr); padding: 12px 16px; }
  .stage { position: static; }
}

/* ---------- arrangement ---------- */
.arrange {
  grid-column: 1 / -1;
  padding: 10px 12px 12px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
}
.arr-head { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 14px; margin-bottom: 8px; }
.arr-title { font-family: var(--retro); letter-spacing: 0.18em; color: var(--green); }
.seg { display: flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.seg button {
  padding: 5px 11px; border: none; background: var(--panel2); cursor: pointer;
  font-family: var(--retro); font-size: 12px; letter-spacing: 0.1em; color: var(--dim);
}
.seg button.on { background: var(--green); color: #04110a; }
.btn.small { padding: 4px 9px; font-size: 11px; color: var(--dim); }
.arr-hint { margin-left: auto; font-size: 11px; color: var(--dim); }
.arr-body { display: grid; grid-template-columns: 168px minmax(0, 1fr); }
.arr-labels { display: flex; flex-direction: column; }
.arr-spacer { height: 20px; }
.arr-label { --c: var(--green); height: 30px; display: flex; align-items: center; gap: 6px; padding-right: 8px; }
.arr-label .dot { flex: none; width: 9px; height: 9px; border-radius: 50%; background: var(--c); box-shadow: 0 0 6px var(--c); }
.arr-label .nm {
  flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  font-family: var(--retro); font-size: 14px; color: var(--c); cursor: pointer;
}
.arr-label.sel .nm { text-decoration: underline; text-underline-offset: 3px; }
.arr-label.silent { opacity: 0.45; }
.arr-label .tog { width: 22px; height: 20px; font-size: 10px; }
.arr-scroll { overflow-x: auto; overflow-y: hidden; }
.arr-inner { position: relative; min-width: 100%; }
#ruler { display: block; width: 100%; height: 20px; cursor: pointer; }
.arr-row { display: block; width: 100%; height: 30px; cursor: pointer; touch-action: none; }
.arr-playhead {
  position: absolute; top: 0; bottom: 0; width: 2px; margin-left: -1px; pointer-events: none;
  background: #e8fff0; box-shadow: 0 0 8px var(--green);
}
.arrange.pattern-mode .arr-scroll { opacity: 0.4; }
.arrange.pattern-mode .arr-playhead { display: none; }
@media (max-width: 700px) {
  .arr-body { grid-template-columns: 110px minmax(0, 1fr); }
  .arr-hint { margin-left: 0; }
}

/* ---------- CRT monitor ---------- */
.monitor {
  background: linear-gradient(#272b25, #191c17);
  border-radius: 22px;
  padding: 16px 16px 6px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.06), inset 0 0 0 1px #0a0b09;
}
.screen {
  position: relative; aspect-ratio: 16 / 10;
  border-radius: 28px / 24px; overflow: hidden; background: #040806;
  box-shadow: 0 0 0 5px #10120f, 0 0 0 6px #2d322b;
}
.screen canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; cursor: crosshair; }
.screen-fx {
  position: absolute; inset: 0; pointer-events: none;
  background:
    repeating-linear-gradient(to bottom, rgba(0, 0, 0, 0.2) 0 1px, transparent 1px 3px),
    radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 0, 0.6) 100%);
}
.hud {
  position: absolute; pointer-events: none;
  font-family: var(--retro); font-size: 12px; letter-spacing: 0.08em;
  color: rgba(125, 255, 168, 0.75); text-shadow: 0 0 6px rgba(125, 255, 168, 0.45);
}
.hud-tl { top: 12px; left: 50%; transform: translateX(-50%); white-space: nowrap; }
.hud-br { bottom: 30px; right: 20px; }
.view-toggle { position: absolute; top: 10px; right: 16px; display: flex; gap: 4px; }
.view-toggle button {
  background: rgba(8, 18, 12, 0.75); border: 1px solid rgba(125, 255, 168, 0.25);
  color: rgba(125, 255, 168, 0.65); font-family: var(--retro); font-size: 11px; letter-spacing: 0.1em;
  padding: 3px 9px; border-radius: 4px; cursor: pointer;
}
.view-toggle button.on { color: #04110a; background: var(--green); border-color: var(--green); }
.monitor-label {
  text-align: center; font-family: var(--retro); font-size: 11px; letter-spacing: 0.28em;
  color: #8a9386; padding: 9px 0 3px;
}

/* ---------- formula plate ---------- */
.plate-wrap { filter: drop-shadow(0 6px 14px rgba(0, 0, 0, 0.55)); }
.plate {
  min-height: 76px; padding: 14px 26px;
  display: flex; align-items: center; justify-content: center;
  color: #2a1803;
  background:
    radial-gradient(rgba(120, 60, 0, 0.16) 1px, transparent 1.6px) 0 0 / 7px 7px,
    linear-gradient(#fcc65e, #f0a238);
  clip-path: polygon(0 10%, 3% 0, 28% 5%, 61% 0, 97% 4%, 100% 14%, 99% 52%, 100% 88%, 96% 100%, 57% 95%, 22% 100%, 2% 96%, 0 62%);
}
.tex { font-size: 25px; max-width: 100%; overflow-x: auto; overflow-y: hidden; white-space: nowrap; padding: 4px 0; }
.tex.err { font-family: var(--mono); font-size: 14px; color: #7a1800; white-space: normal; }
.tex.off { font-family: var(--retro); font-size: 16px; letter-spacing: 0.1em; color: #5a3608; }
.subtitle {
  min-height: 38px; padding: 8px 14px;
  background: #0b110d; border: 1px solid #1d2a20; border-radius: 4px;
  text-align: center; font-family: var(--retro); font-size: 15px; color: var(--green);
  text-shadow: 0 0 6px rgba(125, 255, 168, 0.35);
}
.outscope {
  display: flex; align-items: center; gap: 10px;
  background: #090d0a; border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px;
}
.outscope span { font-family: var(--retro); font-size: 11px; letter-spacing: 0.15em; color: var(--dim); }
.outscope canvas { flex: 1; min-width: 0; height: 54px; display: block; }

.explain { padding: 2px 4px; color: #6f7c6c; font-size: 12px; line-height: 1.55; }
.explain p { margin: 0 0 6px; }
.explain b { color: #8d9a89; font-weight: 600; }
.explain .chain { font-family: var(--retro); font-size: 13px; letter-spacing: 0.03em; color: #8d9a89; }
.explain .live { font-family: var(--mono); font-size: 11.5px; color: #7d8a79; white-space: pre-wrap; }

/* ---------- track rack ---------- */
.rack { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
#tracks { display: flex; flex-direction: column; gap: 12px; }
.track {
  --c: var(--green);
  display: flex; flex-direction: column; gap: 7px;
  padding: 10px 12px;
  background: var(--panel); border: 1px solid var(--line); border-left: 4px solid var(--c); border-radius: 10px;
  transition: box-shadow .15s, border-color .15s, opacity .15s;
}
.track.sel {
  border-color: color-mix(in srgb, var(--c) 55%, var(--line));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--c) 35%, transparent), 0 0 28px -10px var(--c);
}
.track.silent { opacity: 0.5; }
.track-head { display: flex; align-items: center; gap: 8px; }
.swatch {
  flex: none; width: 15px; height: 15px; padding: 0; border: none; border-radius: 50%;
  background: var(--c); box-shadow: 0 0 8px var(--c); cursor: pointer;
}
.name {
  flex: 1; min-width: 0; padding: 2px 0;
  background: transparent; border: none; border-bottom: 1px dashed transparent;
  font-family: var(--retro); font-size: 15px; letter-spacing: 0.06em; color: var(--c);
}
.name:focus { outline: none; border-bottom-color: var(--line); }
.head-btns { display: flex; gap: 4px; }
.tog, .icon {
  width: 26px; height: 24px; padding: 0;
  background: var(--panel2); border: 1px solid var(--line); border-radius: 5px;
  font-size: 11px; color: var(--dim); cursor: pointer;
}
.tog:hover, .icon:hover { border-color: #43513f; color: var(--text); }
.tog.mute.on { background: #5a2626; border-color: #8a3a3a; color: #ffd4d4; }
.tog.solo.on { background: #5a4a1d; border-color: #9a7b2a; color: #fff1b5; }

.frow { display: grid; grid-template-columns: 52px minmax(0, 1fr); align-items: center; gap: 4px 6px; }
.frow label {
  text-align: right; white-space: nowrap; cursor: pointer;
  font-family: "Times New Roman", Georgia, serif; font-size: 15px; color: var(--dim);
}
.frow.active label { color: var(--c); }
.formula {
  width: 100%; padding: 6px 8px;
  background: #0a0d09; border: 1px solid #252b23; border-radius: 6px;
  color: #d9ffe4; font-family: var(--mono); font-size: 13px;
}
.formula::placeholder { color: #4b5848; }
.formula:focus { outline: none; border-color: var(--c); }
.frow.active .formula { border-color: color-mix(in srgb, var(--c) 50%, #252b23); }
.formula.bad { border-color: var(--red) !important; color: #ffc9c9; }
.ferr { grid-column: 2; font-size: 11px; color: var(--red); }
.ferr:empty { display: none; }

.params { display: flex; flex-wrap: wrap; gap: 6px 12px; font-size: 11px; color: var(--dim); }
.params label { display: flex; align-items: center; gap: 5px; }
.params select { padding: 2px 4px; font-size: 11px; }
.params input[type=range] { width: 54px; accent-color: var(--c); }
.note {
  padding: 6px 0 0; background: transparent; border: none; border-top: 1px dashed var(--line);
  font-family: var(--retro); font-size: 13px; color: var(--green);
}
.note::placeholder { color: #4b5848; }
.note:focus { outline: none; }
.mini { width: 100%; height: 44px; display: block; border-radius: 6px; background: #090d0a; cursor: pointer; }
.add { align-self: flex-start; color: var(--green); }

/* ---------- help + toast ---------- */
dialog {
  width: min(760px, calc(100vw - 32px)); max-height: calc(100vh - 48px);
  padding: 20px 24px; background: #12150f; color: var(--text);
  border: 1px solid var(--line); border-radius: 12px;
}
dialog::backdrop { background: rgba(0, 0, 0, 0.6); }
dialog h2 { font-family: var(--retro); letter-spacing: 0.12em; color: var(--green); font-weight: normal; margin: 6px 0 10px; }
dialog p { color: #b8c7b5; }
dialog .close { position: sticky; top: 0; float: right; }
dialog table { border-collapse: collapse; width: 100%; }
dialog td { padding: 4px 10px 4px 0; vertical-align: top; border-bottom: 1px solid #1e231c; }
dialog td:first-child { white-space: nowrap; color: var(--amber); font-family: var(--mono); }
.vars td:first-child { font-family: "Times New Roman", Georgia, serif; font-size: 16px; }
.hint { color: var(--dim) !important; font-size: 12px; }

#toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px);
  padding: 8px 16px; border-radius: 8px;
  background: #1d3a26; border: 1px solid var(--green); color: var(--green);
  font-family: var(--retro); letter-spacing: 0.06em;
  opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s;
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }