/* GARGANTUA — instrument HUD over void. See DESIGN.md for the token contract. */

:root {
  --void: #030405;
  --ink: #d6dae0;
  --ink-dim: #9a948b;
  --accent: #f2a45c;
  --accent-hot: #ffd9a0;
  --hairline: rgba(242, 164, 92, 0.16);
  --hairline-strong: rgba(242, 164, 92, 0.34);
  --danger: #ff6a5e;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--void);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

#view {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: grab;
}
#view:active { cursor: grabbing; }

/* ---------- shared atoms ---------- */

.label {
  font-family: var(--sans);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.value { font-family: var(--mono); color: var(--ink); }

.btn {
  appearance: none;
  background: transparent;
  border: 1px solid var(--hairline);
  color: var(--ink-dim);
  font-family: var(--sans);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 7px 12px;
  cursor: pointer;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}
.btn:hover { color: var(--accent-hot); border-color: var(--hairline-strong); background: rgba(242, 164, 92, 0.06); }
.btn.on { color: var(--accent); border-color: var(--hairline-strong); }
.btn:focus-visible, input:focus-visible { outline: 1px solid var(--accent); outline-offset: 2px; }

/* corner ticks: 6px L-brackets marking an interactive region */
.ticked { position: relative; }
.ticked::before, .ticked::after {
  content: "";
  position: absolute;
  width: 6px; height: 6px;
  border: 0 solid var(--hairline-strong);
  pointer-events: none;
}
.ticked::before { top: -1px; left: -1px; border-top-width: 1px; border-left-width: 1px; }
.ticked::after { bottom: -1px; right: -1px; border-bottom-width: 1px; border-right-width: 1px; }

/* ---------- boot overlay ---------- */

.boot {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--void);
  transition: opacity 700ms var(--ease), visibility 700ms;
}
.boot.gone { opacity: 0; visibility: hidden; }
.boot-inner { text-align: center; }
.boot-mark {
  font-family: var(--sans);
  font-size: clamp(26px, 4.5vw, 44px);
  font-weight: 200;
  letter-spacing: 0.42em;
  margin-right: -0.42em; /* optically recenter tracked caps */
  color: var(--ink);
}
.boot-sub {
  margin-top: 10px;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.3em;
  margin-right: -0.3em;
  color: var(--ink-dim);
  text-transform: uppercase;
}
.boot-bar {
  width: min(320px, 60vw);
  height: 1px;
  margin: 30px auto 12px;
  background: rgba(242, 164, 92, 0.12);
}
.boot-bar-fill {
  width: 100%;
  height: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 300ms var(--ease);
}
.boot-status {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
  min-height: 14px;
}

/* ---------- fatal card ---------- */

.fatal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(3, 4, 5, 0.94);
  padding: 24px;
}
.fatal[hidden] { display: none; }
.fatal-card {
  max-width: 460px;
  border: 1px solid var(--hairline);
  padding: 28px 30px;
  background: rgba(5, 6, 8, 0.8);
}
.fatal-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--danger);
  margin-bottom: 14px;
}
.fatal-msg { font-family: var(--mono); font-size: 12px; line-height: 1.6; color: var(--ink); }
.fatal-hint { font-size: 11px; line-height: 1.6; color: var(--ink-dim); margin-top: 10px; }
.fatal .btn { margin-top: 20px; }

/* ---------- HUD frame ---------- */

.hud { position: fixed; inset: 0; z-index: 20; pointer-events: none; }
.hud[hidden] { display: none; }
.hud > * { pointer-events: none; }
.hud button, .hud input, .hud select, .hud .panel, .hud .drawer-toggle { pointer-events: auto; }

.hud-corner { position: absolute; display: flex; flex-direction: column; gap: 4px; }

/* top-left: wordmark */
.hud-tl { top: max(18px, env(safe-area-inset-top)); left: 22px; }
.mark {
  font-size: 17px;
  font-weight: 200;
  letter-spacing: 0.42em;
  color: var(--ink);
  user-select: none;
}
.mark-sub {
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.26em;
  color: var(--ink-dim);
  text-transform: uppercase;
}

/* top-right: telemetry */
.hud-tr { top: max(18px, env(safe-area-inset-top)); right: 22px; text-align: right; }
.tele { display: grid; grid-template-columns: auto auto; gap: 3px 10px; justify-content: end; }
.tele .label { align-self: baseline; padding-top: 1px; }
.tele .value { font-size: 11px; text-align: right; min-width: 74px; }
.tele .value b { color: var(--accent-hot); font-weight: 500; }

/* top-center: debug chip */
.debug-chip {
  position: absolute;
  top: max(18px, env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--void);
  background: var(--accent);
  padding: 4px 10px;
  display: none;
}
.debug-chip.on { display: block; }

/* bottom-center: key hints + toast */
.hud-bc {
  position: absolute;
  bottom: max(14px, env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  white-space: nowrap;
}
.hints { font-size: 9px; letter-spacing: 0.1em; color: var(--ink-dim); }
.hints .k {
  font-family: var(--mono);
  color: var(--ink);
  border: 1px solid var(--hairline);
  padding: 1px 4px;
  margin: 0 2px;
  font-size: 9px;
}
.toast {
  position: absolute;
  bottom: 34px;
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--accent-hot);
  background: rgba(5, 6, 8, 0.85);
  border: 1px solid var(--hairline);
  padding: 7px 14px;
  opacity: 0;
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
  white-space: nowrap;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* bottom-right: presets + quality + toggles */
.hud-br {
  bottom: max(16px, env(safe-area-inset-bottom));
  right: 22px;
  align-items: flex-end;
}
.btn-row { display: flex; gap: 6px; justify-content: flex-end; flex-wrap: wrap; }
.btn-row + .btn-row { margin-top: 2px; }

/* bottom-left: parameter drawer */
.hud-bl { bottom: max(16px, env(safe-area-inset-bottom)); left: 22px; }
.drawer-toggle { min-width: 174px; text-align: left; }
.drawer-toggle .value { float: right; color: var(--accent); font-size: 10px; }

.panel {
  width: 306px;
  max-height: min(60vh, 560px);
  margin-bottom: 8px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: rgba(5, 6, 8, 0.74);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--hairline);
  padding: 4px 16px 14px;
  scrollbar-width: thin;
  scrollbar-color: rgba(242, 164, 92, 0.3) transparent;
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}
.panel.closed { opacity: 0; transform: translateY(8px); pointer-events: none !important; }

.pgroup { margin-top: 14px; }
.pgroup-title {
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--accent);
  text-transform: uppercase;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 5px;
  margin-bottom: 9px;
  display: flex;
  justify-content: space-between;
}
.pgroup-title .count { color: var(--ink-dim); font-family: var(--mono); letter-spacing: 0; }

.prow { display: grid; grid-template-columns: 1fr 62px; gap: 2px 8px; align-items: center; margin-bottom: 8px; }
.prow .label { font-size: 8.5px; cursor: default; }
.prow .value { font-size: 10px; text-align: right; color: var(--accent-hot); }
.prow input[type="range"] {
  grid-column: 1 / -1;
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 14px;
  background: transparent;
  cursor: ew-resize;
}
.prow input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: linear-gradient(to right, var(--accent) var(--fill, 50%), rgba(242, 164, 92, 0.15) var(--fill, 50%));
}
.prow input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 9px; height: 9px;
  margin-top: -3.5px;
  background: var(--void);
  border: 1px solid var(--accent);
}
.prow input[type="range"]::-moz-range-track {
  height: 2px;
  background: rgba(242, 164, 92, 0.15);
}
.prow input[type="range"]::-moz-range-progress { height: 2px; background: var(--accent); }
.prow input[type="range"]::-moz-range-thumb {
  width: 7px; height: 7px;
  border-radius: 0;
  background: var(--void);
  border: 1px solid var(--accent);
}

/* ---------- responsive ---------- */

@media (max-width: 760px) {
  .hud-tl { left: 14px; }
  .hud-tr { right: 14px; }
  .mark { font-size: 13px; }
  .tele .value { min-width: 60px; font-size: 10px; }
  .tele .row-xtra { display: none; }
  .hints { display: none; }
  .hud-br { right: 14px; bottom: calc(max(14px, env(safe-area-inset-bottom)) + 46px); }
  .hud-bl { left: 14px; right: 14px; }
  .panel { width: 100%; max-height: 44vh; }
  .drawer-toggle { min-width: 150px; }
}

@media (prefers-reduced-motion: reduce) {
  .boot, .toast, .panel, .btn { transition: none; }
}