/* One synthwave look, explicit colours (no light/dark switch: the page is a night sky). */
:root {
  --bg: #0b0221;
  --bg2: #150536;
  --panel: #1a0840;
  --edge: #3b1670;
  --ink: #f4e9ff;
  --muted: #a38cc8;
  --magenta: #ff2bd6;
  --cyan: #22e6ff;
  --sun: #ffb238;
  --green: #39ff9f;
  --warn: #ff5c7a;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: radial-gradient(120% 80% at 50% 0%, #2a0a52 0%, var(--bg) 60%) fixed, var(--bg);
  color: var(--ink);
  font: 14px/1.45 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  overflow-x: hidden;
}
button, select, textarea, input { font: inherit; color: inherit; }
h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: 0.02em; }
h1 { font-size: 18px; color: var(--magenta); text-shadow: 0 0 10px rgba(255, 43, 214, 0.6); }
h2 { font-size: 12px; text-transform: uppercase; color: var(--cyan); margin: 12px 0 6px; }
h3 { font-size: 13px; text-transform: uppercase; color: var(--cyan); margin-bottom: 8px; }
small { color: var(--muted); font-weight: 400; text-transform: none; letter-spacing: 0; }
.sub { margin: 2px 0 0; color: var(--muted); font-size: 12px; }

.top {
  display: flex; flex-wrap: wrap; gap: 10px 20px; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--edge); background: rgba(11, 2, 33, 0.7);
}
.topctl { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

.seg { display: inline-flex; border: 1px solid var(--edge); border-radius: 6px; overflow: hidden; }
.seg button { background: transparent; border: 0; padding: 6px 10px; cursor: pointer; color: var(--muted); }
.seg button.on { background: var(--magenta); color: #1a0030; }
.seg.small button { padding: 3px 9px; }
.sound, .walk button, #star, .pad {
  background: var(--panel); border: 1px solid var(--cyan); color: var(--cyan); border-radius: 6px;
  padding: 6px 12px; cursor: pointer;
}
.sound.on { background: var(--cyan); color: #04121a; }
button:focus-visible, select:focus-visible, textarea:focus-visible, input:focus-visible { outline: 2px solid var(--sun); outline-offset: 2px; }

.layout {
  display: grid; gap: 14px; padding: 14px 16px 24px;
  grid-template-columns: minmax(270px, 320px) minmax(0, 1fr);
  grid-template-areas: "rail stage" "out out";
  max-width: 1500px; margin: 0 auto;
}
.rail { grid-area: rail; min-width: 0; }
.stage { grid-area: stage; min-width: 0; }
.out {
  grid-area: out; min-width: 0; display: grid; gap: 14px;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr) minmax(0, 1.3fr) minmax(0, 0.9fr);
}
.out > div, .rail > section, .written:not(:empty) {
  background: rgba(26, 8, 64, 0.72); border: 1px solid var(--edge); border-radius: 8px; padding: 10px 12px;
}
.rail > section + section, .rail .written { margin-top: 10px; }
.rail .blocks { padding-top: 2px; }

.chips { display: flex; flex-wrap: wrap; gap: 5px; }
.chip {
  border: 1px solid var(--edge); background: var(--bg2); color: var(--ink); border-radius: 999px;
  padding: 3px 9px; font-size: 12px; cursor: pointer; line-height: 1.4;
}
.chip:hover { border-color: var(--cyan); }
.chip.on { background: var(--cyan); color: #04121a; border-color: var(--cyan); box-shadow: 0 0 10px rgba(34, 230, 255, 0.55); }
.chip.src.on { background: var(--magenta); border-color: var(--magenta); color: #1a0030; box-shadow: 0 0 10px rgba(255, 43, 214, 0.55); }
.chip.dim { opacity: 0.45; }
.chip .tag { font-size: 10px; opacity: 0.75; margin-left: 4px; }

.verdict { font-size: 13px; }
.verdict.bad { border-color: var(--warn); color: var(--warn); }
.verdict.good b { color: var(--green); }
.walk { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.walk button.on { background: var(--magenta); border-color: var(--magenta); color: #1a0030; }
.count { margin: 0; width: 100%; color: var(--muted); font-size: 12px; }
.count b { color: var(--sun); font-size: 15px; }
.needs { font-size: 12px; }
.needs dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 3px 10px; }
.needs dt { color: var(--muted); }
.needs dd { margin: 0; }
.needs .warn { color: var(--warn); }
.needs .ok { color: var(--green); }
.written { font-size: 12px; color: var(--muted); margin: 10px 0 0; }
.written a { color: var(--cyan); }

#scene {
  display: block; width: 100%; height: auto; aspect-ratio: 320 / 200;
  image-rendering: pixelated; image-rendering: crisp-edges;
  border: 1px solid var(--edge); border-radius: 8px; background: #0b0221; touch-action: none; cursor: grab;
}
.controls {
  display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; margin-top: 10px;
  background: rgba(26, 8, 64, 0.72); border: 1px solid var(--edge); border-radius: 8px; padding: 10px 12px; font-size: 12px;
}
.controls label, .ctlgroup { display: inline-flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.controls input[type=range] { width: 110px; accent-color: var(--magenta); }
.lbl { color: var(--ink); }
.hint { color: var(--muted); font-size: 11px; }
.pad { padding: 3px 9px; font-size: 12px; }
.pad.panic { border-color: var(--warn); color: var(--warn); }
.pad.panic.on { background: var(--warn); color: #20000a; }
.note { color: var(--muted); font-size: 12px; margin: 6px 2px 0; }

.lanehead { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.legend { font-size: 11px; color: var(--muted); }
.legend i { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin: 0 4px 0 8px; vertical-align: -1px; }
.legend i.raw, .bar i.raw { background: var(--sun); }
.legend i.played { background: var(--cyan); }
.lane { display: block; width: 100%; height: 64px; margin-bottom: 6px; border-radius: 4px; background: #10032a; }
.mrow { display: grid; grid-template-columns: 9.5em minmax(0, 1fr) 4.2em; gap: 8px; align-items: center; font-size: 12px; margin: 5px 0; }
.bar { position: relative; height: 10px; background: #10032a; border: 1px solid var(--edge); border-radius: 3px; overflow: hidden; }
.bar i { position: absolute; left: 0; top: 0; bottom: 0; width: 0; background: var(--cyan); transition: width 0.25s; }
.bar b { position: absolute; top: -2px; bottom: -2px; width: 2px; background: var(--magenta); left: 0; }
.mv { text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }
.mverdict { margin: 6px 0 0; font-size: 12px; }
.mverdict .stuck { color: var(--sun); }
.mverdict .free { color: var(--green); }
.chk { display: flex; gap: 6px; align-items: center; font-size: 12px; margin-top: 8px; }

.msgs { list-style: none; margin: 0 0 10px; padding: 0; font-size: 12px; min-height: 7.5em; }
.msgs li { padding: 2px 0; border-bottom: 1px dashed rgba(59, 22, 112, 0.7); overflow-wrap: anywhere; }
.msgs li:first-child { color: var(--cyan); }
.lands label { display: flex; flex-direction: column; gap: 2px; font-size: 11px; color: var(--muted); margin-bottom: 6px; }
.lands select { width: 100%; background: var(--bg2); border: 1px solid var(--edge); border-radius: 4px; padding: 3px; color: var(--ink); font-size: 12px; }
.lands ul { margin: 6px 0 0; padding-left: 16px; font-size: 12px; }
.lands li { overflow-wrap: anywhere; }

.shortlist textarea {
  width: 100%; margin-top: 8px; background: var(--bg2); border: 1px solid var(--edge); border-radius: 4px; padding: 6px; resize: vertical; font-size: 12px;
}
#star.on { background: var(--sun); border-color: var(--sun); color: #201000; }
#starred { list-style: none; padding: 0; margin: 8px 0 0; font-size: 12px; }
#starred li { display: flex; gap: 6px; align-items: flex-start; padding: 4px 0; border-top: 1px dashed var(--edge); }
#starred button { background: none; border: 0; color: var(--cyan); cursor: pointer; text-align: left; padding: 0; flex: 1; overflow-wrap: anywhere; }
#starred .x { flex: 0 0 auto; color: var(--muted); }
#starred em { display: block; color: var(--muted); font-style: normal; }

@media (max-width: 1100px) {
  .out { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}
@media (max-width: 760px) {
  .layout { grid-template-columns: minmax(0, 1fr); grid-template-areas: "stage" "rail" "out"; padding: 10px 16px 20px; }
  .out { grid-template-columns: minmax(0, 1fr); }
  .controls input[type=range] { width: 96px; }
  .mrow { grid-template-columns: 8em minmax(0, 1fr) 3.6em; }
}

.back { display: inline-block; font-size: 13px; margin-bottom: 4px; color: inherit; opacity: 0.8; }

/* "What can Echo Garden do" panel above the sim */
.about { margin: 0 24px 4px; padding: 10px 14px; background: var(--panel); border: 1px solid var(--edge); border-radius: 8px; }
.about summary { cursor: pointer; color: var(--magenta); font-weight: 700; }
.about p { margin: 8px 0; max-width: 70ch; }
.about-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 4px 18px; }
.about h3 { margin: 10px 0 4px; }
.about ul { margin: 0; padding-left: 18px; color: var(--ink); }
.about li { margin: 2px 0; }
.tries { display: flex; flex-wrap: wrap; gap: 6px; }
.tries button { background: var(--bg2); border: 1px solid var(--edge); border-radius: 6px; padding: 6px 10px; cursor: pointer; text-align: left; }
.tries button:hover, .tries button:focus-visible { border-color: var(--cyan); outline: none; }
@media (max-width: 720px) { .about { margin: 0 16px 4px; } }