:root {
  --ink: #e8e2d4;
  --muted: #8b8476;
  --dim: #5c564c;
  --line: rgba(232, 226, 212, 0.12);
  --panel: rgba(6, 6, 8, 0.58);
  --hot: #ffb37a;
  --cold: #8fd4ff;
  --danger: #ff5a3c;
  --font: "Segoe UI", "Helvetica Neue", ui-sans-serif, system-ui, sans-serif;
  --mono: "Cascadia Mono", "SF Mono", "Consolas", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
  color: var(--ink);
  font-family: var(--font);
  user-select: none;
}

#viewport {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  background: #000;
}

.hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 5;
}

.panel {
  pointer-events: auto;
  position: absolute;
  top: 18px;
  left: 18px;
  width: min(332px, calc(100vw - 28px));
  max-height: calc(100vh - 36px);
  overflow: auto;
  padding: 16px 16px 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  backdrop-filter: blur(14px) saturate(1.1);
  -webkit-backdrop-filter: blur(14px) saturate(1.1);
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.45);
}

.hud-hidden .panel,
.screenshot .panel,
.screenshot .toast,
.screenshot .help,
.screenshot .boot { display: none !important; }

.brand-kicker {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--hot);
}

.brand-title {
  font-size: 28px;
  font-weight: 650;
  letter-spacing: 0.16em;
  line-height: 1.05;
  margin-top: 4px;
}

.brand-sub {
  margin-top: 4px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 12px;
  margin: 14px 0 12px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metric { display: flex; flex-direction: column; gap: 1px; }
.metric .k {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--dim);
}
.metric .v {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink);
}

.view-row, .toggles, .debug-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0;
}

.chip, .dbg {
  pointer-events: auto;
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink);
  font: 11px/1 var(--font);
  letter-spacing: 0.04em;
  padding: 6px 8px;
  cursor: pointer;
}

.chip.on, .dbg.on {
  background: rgba(255, 179, 122, 0.16);
  border-color: rgba(255, 179, 122, 0.55);
  color: var(--hot);
}

.chip:hover, .dbg:hover { border-color: rgba(232, 226, 212, 0.35); }

.dbg {
  width: 28px;
  padding: 6px 0;
  text-align: center;
  font-family: var(--mono);
}

.group-title {
  margin: 10px 0 4px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.slider-row {
  display: grid;
  grid-template-columns: 1fr 92px 58px;
  gap: 8px;
  align-items: center;
  margin: 4px 0;
  font-size: 11px;
  color: var(--ink);
}

.slider-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.slider-val {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  text-align: right;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 18px;
  background: transparent;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: rgba(232, 226, 212, 0.22);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px;
  height: 10px;
  margin-top: -4px;
  background: var(--ink);
  border-radius: 0;
}

input[type="range"]::-moz-range-track {
  height: 2px;
  background: rgba(232, 226, 212, 0.22);
}

input[type="range"]::-moz-range-thumb {
  width: 10px;
  height: 10px;
  border: 0;
  background: var(--ink);
  border-radius: 0;
}

.hint {
  margin-top: 8px;
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--dim);
}

.toast {
  position: absolute;
  top: 22px;
  right: 22px;
  pointer-events: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink);
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.45);
}

.help {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.42);
  pointer-events: auto;
}

.help[hidden], .lost[hidden] { display: none !important; }

.help-card, .lost-card {
  width: min(520px, calc(100vw - 32px));
  padding: 22px 24px;
  border: 1px solid var(--line);
  background: rgba(8, 8, 10, 0.88);
}

.help-title {
  font-family: var(--mono);
  letter-spacing: 0.2em;
  margin-bottom: 12px;
  color: var(--hot);
}

.help-card ul { list-style: none; }
.help-card li {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 10px;
  padding: 5px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

kbd {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--cold);
}

.help-note {
  margin-top: 12px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.prompt-dialog {
  width: min(760px, calc(100vw - 28px));
  max-height: min(82dvh, 720px);
  padding: 0;
  border: 1px solid var(--line);
  background: rgba(8, 8, 10, 0.96);
  color: var(--ink);
  box-shadow: 0 24px 90px rgba(0, 0, 0, 0.78);
  user-select: text;
}

.prompt-dialog::backdrop {
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(8px);
}

.prompt-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}

.prompt-head span { font: 10px var(--mono); letter-spacing: 0.2em; color: var(--hot); }
.prompt-head h2 { margin-top: 5px; font: 600 17px var(--mono); letter-spacing: 0.08em; }
.prompt-head button { border: 0; background: none; color: var(--ink); font-size: 22px; cursor: pointer; }
.prompt-dialog pre { max-height: 58dvh; overflow: auto; padding: 20px; white-space: pre-wrap; font: 13px/1.8 var(--font); }
.prompt-foot { padding: 12px 20px; border-top: 1px solid var(--line); font: 10px var(--mono); letter-spacing: 0.1em; color: var(--muted); }

.lost {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.55);
  pointer-events: auto;
}

.lost-card { color: var(--danger); text-align: center; }
.lost-card p { margin-top: 8px; color: var(--muted); }

.boot {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: #000;
  pointer-events: none;
  transition: opacity 0.6s ease;
}

.boot.out { opacity: 0; }

.boot-kicker {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--hot);
  text-align: center;
}

.boot-title {
  margin: 10px 0 18px;
  text-align: center;
  letter-spacing: 0.28em;
  font-size: 34px;
}

.boot-bar {
  width: 180px;
  height: 1px;
  margin: 0 auto;
  background: rgba(232, 226, 212, 0.12);
  overflow: hidden;
}

.boot-bar span {
  display: block;
  width: 40%;
  height: 100%;
  background: var(--hot);
  animation: sweep 1.2s ease-in-out infinite;
}

@keyframes sweep {
  0% { transform: translateX(-120%); }
  100% { transform: translateX(340%); }
}

@media (max-width: 720px) {
  .panel {
    top: auto;
    bottom: 0;
    left: 0;
    width: 100%;
    max-height: 42vh;
    border-left: 0;
    border-right: 0;
    border-bottom: 0;
  }
  .brand-title { font-size: 22px; }
  .slider-row { grid-template-columns: 1fr 80px 52px; }
  .toast { top: 12px; right: 12px; left: 12px; }
  .prompt-dialog { width: calc(100vw - 12px); max-height: calc(100dvh - 12px); }
  .prompt-dialog pre { max-height: 68dvh; padding: 15px; font-size: 12px; }
}

@media (pointer: coarse) {
  .chip, .dbg { padding: 8px 10px; }
  input[type="range"] { height: 24px; }
}