/* ── ORBITAL · interface ──────────────────────────────────────────────── */

:root {
  --bg: #05070f;
  --ink: #e9f6ff;
  --muted: #8ca4c4;
  --faint: #5d7391;
  --mint: #66f5d6;
  --cyan: #74e9ff;
  --violet: #b78bff;
  --gold: #ffd166;
  --amber: #ffb454;
  --pink: #ff7ad9;
  --red: #ff6f86;
  --stroke: rgba(122, 198, 255, 0.14);
  --stroke-strong: rgba(122, 214, 255, 0.28);
  --panel: rgba(9, 16, 30, 0.82);
  --panel-solid: #0a1222;
  --radius: 18px;
  --topbar-h: 78px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --ease: cubic-bezier(0.22, 0.68, 0.28, 1);
  --font: "Segoe UI Variable Display", "Segoe UI", Inter, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "SFMono-Regular", ui-monospace, "Cascadia Mono", Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  -webkit-tap-highlight-color: transparent;
}

body {
  user-select: none;
  overscroll-behavior: none;
}

[hidden] { display: none !important; }

.backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(1100px 780px at 76% 16%, rgba(92, 60, 190, 0.24), transparent 62%),
    radial-gradient(880px 700px at 18% 82%, rgba(20, 122, 150, 0.16), transparent 64%),
    radial-gradient(700px 520px at 60% 100%, rgba(150, 60, 120, 0.10), transparent 65%),
    linear-gradient(160deg, #060a14 0%, #04060c 60%, #070b14 100%);
}
.backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.55;
  background-image:
    radial-gradient(1px 1px at 12% 22%, rgba(160, 220, 255, 0.55), transparent 100%),
    radial-gradient(1px 1px at 78% 14%, rgba(190, 170, 255, 0.5), transparent 100%),
    radial-gradient(1.5px 1.5px at 34% 74%, rgba(120, 240, 255, 0.35), transparent 100%),
    radial-gradient(1px 1px at 88% 68%, rgba(255, 210, 160, 0.4), transparent 100%),
    radial-gradient(1px 1px at 54% 44%, rgba(160, 220, 255, 0.35), transparent 100%),
    radial-gradient(1.2px 1.2px at 22% 52%, rgba(190, 170, 255, 0.3), transparent 100%),
    radial-gradient(1px 1px at 66% 86%, rgba(160, 220, 255, 0.3), transparent 100%);
}

canvas#maze {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  display: block;
  touch-action: none;
}

/* ── top bar ─────────────────────────────────────────────────────────── */

#topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: calc(var(--topbar-h) + var(--safe-top));
  padding: var(--safe-top) 22px 0;
  padding-left: calc(22px + env(safe-area-inset-left, 0px));
  padding-right: calc(22px + env(safe-area-inset-right, 0px));
  display: flex;
  align-items: center;
  gap: 22px;
  z-index: 30;
  background: linear-gradient(180deg, rgba(4, 8, 16, 0.85), rgba(4, 8, 16, 0));
  pointer-events: none;
}
#topbar > * { pointer-events: auto; }

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--mint);
  font-size: 20px;
  background: radial-gradient(circle at 40% 35%, rgba(102, 245, 214, 0.22), rgba(102, 245, 214, 0.04) 70%);
  border: 1px solid rgba(102, 245, 214, 0.28);
  box-shadow: 0 0 26px rgba(102, 245, 214, 0.15), inset 0 0 18px rgba(102, 245, 214, 0.08);
}
.brand-copy h1 {
  margin: 0;
  font-size: 17px;
  font-weight: 650;
  letter-spacing: 0.34em;
  line-height: 1.1;
}
.brand-copy p {
  margin: 3px 0 0;
  font-size: 9px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--faint);
}

.mode-tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: rgba(10, 18, 34, 0.62);
  border: 1px solid var(--stroke);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.mode-tabs button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 9px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}
.mode-tabs button:hover { color: var(--ink); }
.mode-tabs button.active {
  color: #041015;
  background: linear-gradient(135deg, var(--mint), #57c8ff);
  box-shadow: 0 4px 18px rgba(86, 240, 220, 0.25);
}

.top-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  appearance: none;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: rgba(10, 18, 34, 0.6);
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  display: grid;
  place-items: center;
  cursor: pointer;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: color 0.2s, border-color 0.2s, background 0.2s, transform 0.15s;
}
.icon-btn:hover {
  color: var(--ink);
  border-color: var(--stroke-strong);
  background: rgba(16, 28, 50, 0.8);
}
.icon-btn:active { transform: scale(0.94); }
.icon-btn.on { color: var(--mint); border-color: rgba(102, 245, 214, 0.4); }

/* ── side panel ──────────────────────────────────────────────────────── */

.panel {
  position: fixed;
  z-index: 25;
  left: 20px;
  top: calc(var(--topbar-h) + var(--safe-top) + 6px);
  bottom: 20px;
  width: 372px;
  padding: 20px 20px 18px;
  overflow-y: auto;
  overscroll-behavior: contain;
  border-radius: 24px;
  border: 1px solid var(--stroke);
  background: linear-gradient(180deg, rgba(12, 21, 38, 0.9), rgba(6, 11, 22, 0.93));
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(22px) saturate(120%);
  -webkit-backdrop-filter: blur(22px) saturate(120%);
  scrollbar-width: thin;
  scrollbar-color: rgba(110, 180, 230, 0.25) transparent;
  transition: transform 0.35s var(--ease), opacity 0.25s;
}
.panel::-webkit-scrollbar { width: 8px; }
.panel::-webkit-scrollbar-thumb {
  background: rgba(110, 180, 230, 0.22);
  border-radius: 4px;
}
.panel::-webkit-scrollbar-track { background: transparent; }

.sheet-grip { display: none; }

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}
.panel-head h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 650;
  letter-spacing: -0.01em;
}
.panel-head p {
  margin: 5px 0 0;
  color: var(--faint);
  font-size: 11.5px;
  line-height: 1.45;
}
.panel-head .icon-btn { flex: none; margin-top: 2px; }

.field { margin-bottom: 16px; }
.field.inline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.label-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}
label {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
output {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mint);
  letter-spacing: 0.02em;
}
.tiny {
  font-size: 10.5px;
  color: var(--faint);
  letter-spacing: 0.04em;
}
.hint {
  margin: 7px 0 0;
  font-size: 10.5px;
  line-height: 1.5;
  color: var(--faint);
}

.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

/* algorithm picker */
.algo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}
.algo-btn {
  appearance: none;
  border: 1px solid var(--stroke);
  background: rgba(12, 22, 40, 0.55);
  color: var(--muted);
  font: inherit;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 10px 4px;
  border-radius: 11px;
  cursor: pointer;
  text-align: center;
  transition: all 0.18s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.algo-btn:hover { color: var(--ink); border-color: var(--stroke-strong); }
.algo-btn.active {
  color: #051318;
  background: linear-gradient(135deg, var(--mint), #6fb6ff);
  border-color: transparent;
  box-shadow: 0 4px 18px rgba(80, 230, 220, 0.2);
}
.algo-blurb {
  margin: 8px 0 0;
  font-size: 10.5px;
  color: var(--faint);
  line-height: 1.45;
  min-height: 15px;
}

/* range inputs */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 22px;
  margin: 0;
  background: transparent;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(102, 245, 214, 0.55), rgba(116, 233, 255, 0.18));
}
input[type="range"]::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(102, 245, 214, 0.55), rgba(116, 233, 255, 0.18));
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  margin-top: -6px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 32%, #ffffff, var(--mint) 55%, #2fb7a5);
  border: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5), 0 0 0 4px rgba(102, 245, 214, 0.08);
  transition: box-shadow 0.2s;
}
input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--mint);
  border: 0;
}

/* text input / select */
input[type="text"], select {
  width: 100%;
  appearance: none;
  border: 1px solid var(--stroke);
  background: rgba(8, 15, 28, 0.8);
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  padding: 10px 12px;
  border-radius: 11px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
input[type="text"]:focus, select:focus {
  border-color: rgba(102, 245, 214, 0.5);
  box-shadow: 0 0 0 3px rgba(102, 245, 214, 0.08);
}
select option { background: var(--panel-solid); color: var(--ink); }
.seed-row { display: flex; gap: 8px; }
.seed-row input { font-family: var(--mono); letter-spacing: 0.06em; }

/* buttons */
.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 12px;
  font: inherit;
  font-size: 12.5px;
  font-weight: 650;
  letter-spacing: 0.02em;
  padding: 11px 16px;
  cursor: pointer;
  color: var(--ink);
  background: rgba(20, 34, 58, 0.8);
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(0.99); }
.btn.primary {
  background: linear-gradient(135deg, var(--mint) 0%, #66c6ff 52%, #8d9dff 100%);
  color: #041217;
  box-shadow: 0 10px 30px rgba(86, 230, 220, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}
.btn.primary:hover { box-shadow: 0 14px 38px rgba(86, 230, 220, 0.28); }
.btn.ghost {
  background: rgba(14, 26, 46, 0.65);
  border-color: var(--stroke);
  color: var(--muted);
}
.btn.ghost:hover { color: var(--ink); border-color: var(--stroke-strong); }
.btn.mini { padding: 8px 12px; font-size: 11px; border-radius: 10px; }
.btn.wide { width: 100%; padding: 14px 18px; font-size: 13.5px; border-radius: 14px; }
.start-btn { margin-top: 4px; }
.start-top { flex: none; margin-top: 2px; padding: 9px 16px; }

/* checkboxes */
.check {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
}
.check input {
  appearance: none;
  width: 16px;
  height: 16px;
  margin: 0;
  border-radius: 5px;
  border: 1px solid rgba(140, 180, 220, 0.35);
  background: rgba(8, 16, 30, 0.8);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: all 0.15s;
}
.check input::after {
  content: "";
  width: 8px;
  height: 5px;
  border-left: 2px solid #041217;
  border-bottom: 2px solid #041217;
  transform: rotate(-45deg) scale(0);
  transition: transform 0.15s;
  margin-top: -2px;
}
.check input:checked {
  background: linear-gradient(135deg, var(--mint), #6fb6ff);
  border-color: transparent;
}
.check input:checked::after { transform: rotate(-45deg) scale(1); }

/* segmented control */
.seg {
  display: flex;
  gap: 3px;
  padding: 3px;
  border-radius: 12px;
  background: rgba(6, 12, 24, 0.7);
  border: 1px solid var(--stroke);
}
.seg button {
  flex: 1;
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 11px;
  font-weight: 600;
  padding: 8px 4px;
  border-radius: 9px;
  cursor: pointer;
  transition: all 0.16s;
  white-space: nowrap;
}
.seg button:hover { color: var(--ink); }
.seg button.active {
  color: #051318;
  background: linear-gradient(135deg, rgba(102, 245, 214, 0.95), rgba(102, 182, 255, 0.95));
  box-shadow: 0 2px 12px rgba(102, 245, 214, 0.18);
}

.zoom-custom { margin-top: 10px; }
.zoom-seg button { font-size: 10.5px; }

.stats {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: rgba(6, 12, 24, 0.5);
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--faint);
  line-height: 1.65;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px 10px;
}
.stats b { color: var(--muted); font-weight: 500; }
.stats span { color: var(--mint); }

.build-hud {
  position: fixed;
  right: 26px;
  bottom: 22px;
  z-index: 10;
  text-align: right;
  pointer-events: none;
  transition: opacity 0.3s;
}
.build-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--faint);
}
.build-meta #buildAlgo { color: var(--muted); }
.dot-sep { opacity: 0.5; margin: 0 5px; }
.build-hint {
  margin-top: 5px;
  font-size: 10px;
  color: rgba(93, 115, 145, 0.75);
  letter-spacing: 0.02em;
}

/* ── difficulty / play panel ─────────────────────────────────────────── */

.difficulty-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
}
.diff-card {
  appearance: none;
  text-align: left;
  border: 1px solid var(--stroke);
  background: rgba(10, 19, 35, 0.6);
  border-radius: 13px;
  padding: 11px 12px;
  color: var(--ink);
  font: inherit;
  cursor: pointer;
  transition: all 0.18s;
  position: relative;
  overflow: hidden;
}
.diff-card:hover { border-color: var(--stroke-strong); background: rgba(14, 26, 46, 0.75); }
.diff-card .diff-name {
  font-size: 13px;
  font-weight: 650;
  display: flex;
  align-items: center;
  gap: 6px;
}
.diff-card .diff-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--diff-accent, var(--mint));
  box-shadow: 0 0 8px var(--diff-accent, var(--mint));
}
.diff-card .diff-blurb {
  display: block;
  font-size: 9.5px;
  color: var(--faint);
  margin-top: 4px;
  line-height: 1.35;
  letter-spacing: 0.01em;
}
.diff-card .diff-meta {
  display: block;
  font-family: var(--mono);
  font-size: 9px;
  color: rgba(140, 164, 196, 0.7);
  margin-top: 6px;
}
.diff-card.active {
  border-color: rgba(102, 245, 214, 0.5);
  background: linear-gradient(155deg, rgba(102, 245, 214, 0.14), rgba(12, 24, 42, 0.8));
  box-shadow: inset 0 0 24px rgba(102, 245, 214, 0.06);
}
.diff-card.custom { grid-column: span 2; }

.objective-field .hint { min-height: 15px; }

.toggle-row { display: flex; flex-wrap: wrap; gap: 10px 14px; }

/* tilt preview */
.tilt-tools {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 11px;
  padding: 10px;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: rgba(6, 12, 24, 0.45);
}
.tilt-pad {
  flex: none;
  width: 66px;
  height: 66px;
  border-radius: 50%;
  position: relative;
  border: 1px solid rgba(120, 200, 255, 0.18);
  background: radial-gradient(circle at 50% 50%, rgba(20, 40, 70, 0.9), rgba(4, 9, 18, 0.9));
  overflow: hidden;
}
.tilt-pad::before, .tilt-pad::after {
  content: "";
  position: absolute;
  background: rgba(120, 200, 255, 0.12);
}
.tilt-pad::before { left: 50%; top: 8%; bottom: 8%; width: 1px; }
.tilt-pad::after { top: 50%; left: 8%; right: 8%; height: 1px; }
.tilt-dot {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 12px;
  height: 12px;
  margin: -6px 0 0 -6px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 32%, #fff, var(--mint) 55%, #1c8f80);
  box-shadow: 0 0 12px rgba(102, 245, 214, 0.55);
  transition: transform 0.1s linear;
}
.tilt-actions { display: flex; flex-direction: column; gap: 7px; align-items: flex-start; }

/* details */
.details {
  margin: 4px 0 16px;
  border: 1px solid var(--stroke);
  border-radius: 13px;
  background: rgba(6, 12, 24, 0.4);
  overflow: hidden;
}
.details summary {
  padding: 12px 14px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.details summary::-webkit-details-marker { display: none; }
.details summary::after {
  content: "+";
  font-size: 15px;
  color: var(--faint);
}
.details[open] summary::after { content: "–"; }
.custom-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 14px;
  padding: 4px 14px 16px;
}
.custom-grid .field { margin: 0; }
.custom-grid .span2 { grid-column: span 2; }

.best-times {
  margin-top: 14px;
  font-size: 10.5px;
  color: var(--faint);
  line-height: 1.7;
  font-family: var(--mono);
  letter-spacing: 0.02em;
}
.best-times b { color: var(--mint); font-weight: 500; }

/* ── in-game HUD ─────────────────────────────────────────────────────── */

.game-hud {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
}
.game-hud > * { pointer-events: none; }
.game-hud button, .game-hud .hud-chip, .game-hud .minimap-wrap { pointer-events: auto; }

.hud-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: calc(14px + var(--safe-top)) 18px 0;
  padding-left: calc(18px + env(safe-area-inset-left, 0px));
  padding-right: calc(18px + env(safe-area-inset-right, 0px));
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}
.hud-chip {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 38px;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: rgba(8, 15, 28, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}
.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--pink);
  box-shadow: 0 0 10px var(--pink);
  animation: pulse 1.8s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.75); }
}

.timer {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  padding: 7px 22px 8px;
  border-radius: 16px;
  border: 1px solid var(--stroke);
  background: rgba(8, 15, 28, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: border-color 0.3s, color 0.3s;
}
.timer span {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.05;
  color: var(--ink);
}
.timer small {
  font-size: 7.5px;
  letter-spacing: 0.34em;
  color: var(--faint);
}
.timer.warn { border-color: rgba(255, 196, 107, 0.45); }
.timer.warn span { color: var(--gold); }
.timer.danger { border-color: rgba(255, 111, 134, 0.6); animation: danger 0.9s infinite; }
.timer.danger span { color: var(--red); }
@keyframes danger {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 111, 134, 0.0); }
  50% { box-shadow: 0 0 30px rgba(255, 111, 134, 0.35); }
}
.timer.zen span { font-size: 18px; }

.hud-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}
.score {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--gold);
  min-width: 62px;
  text-align: right;
  text-shadow: 0 0 18px rgba(255, 209, 102, 0.35);
  line-height: 1.05;
}
.score::before {
  content: "SCORE";
  display: block;
  font-family: var(--font);
  font-size: 6.5px;
  letter-spacing: 0.26em;
  color: var(--faint);
  margin-bottom: 2px;
}
.hud-right .icon-btn {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  color: var(--ink);
  background: rgba(8, 15, 28, 0.72);
}

.hud-bottom {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0 18px calc(18px + var(--safe-bottom));
  padding-left: calc(18px + env(safe-area-inset-left, 0px));
  padding-right: calc(18px + env(safe-area-inset-right, 0px));
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
}
.control-hint {
  max-width: 360px;
  padding: 8px 13px;
  border-radius: 999px;
  border: 1px solid rgba(122, 198, 255, 0.1);
  background: rgba(4, 9, 18, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-size: 10.5px;
  line-height: 1.5;
  color: var(--faint);
  letter-spacing: 0.02em;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.8);
}
.minimap-wrap {
  width: 136px;
  height: 136px;
  border-radius: 50%;
  flex: none;
  position: relative;
  filter: drop-shadow(0 10px 24px rgba(0, 0, 0, 0.5));
}
#minimap { width: 100%; height: 100%; display: block; }

.countdown {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: radial-gradient(circle, rgba(4, 8, 16, 0.35), rgba(4, 8, 16, 0.7));
  animation: fadeIn 0.2s;
}
.countdown span {
  font-size: clamp(90px, 22vw, 220px);
  font-weight: 200;
  letter-spacing: 0.04em;
  color: var(--mint);
  text-shadow: 0 0 60px rgba(102, 245, 214, 0.4);
  animation: countPop 0.5s var(--ease);
}
@keyframes countPop {
  from { transform: scale(0.7); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.toast {
  position: absolute;
  left: 50%;
  bottom: 150px;
  transform: translate(-50%, 12px);
  max-width: min(82vw, 420px);
  padding: 11px 18px;
  border-radius: 999px;
  border: 1px solid var(--stroke-strong);
  background: rgba(8, 15, 28, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  font-size: 12px;
  font-weight: 500;
  text-align: center;
  color: var(--ink);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ── modals ──────────────────────────────────────────────────────────── */

.modal-root {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgba(2, 5, 10, 0.62);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: fadeIn 0.2s;
}
.modal {
  width: min(440px, 100%);
  border-radius: 24px;
  border: 1px solid var(--stroke-strong);
  background: linear-gradient(180deg, rgba(14, 24, 43, 0.97), rgba(7, 12, 24, 0.98));
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  padding: 26px;
  animation: modalIn 0.32s var(--ease);
  max-height: 90vh;
  overflow-y: auto;
}
@keyframes modalIn {
  from { transform: translateY(18px) scale(0.97); opacity: 0; }
  to { transform: none; opacity: 1; }
}
.modal .eyebrow {
  font-size: 9.5px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--mint);
  margin: 0 0 8px;
}
.modal h2 {
  margin: 0 0 8px;
  font-size: 26px;
  font-weight: 650;
  letter-spacing: -0.02em;
}
.modal p {
  margin: 0 0 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}
.modal .result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 18px 0 20px;
}
.result-cell {
  padding: 12px 14px;
  border-radius: 13px;
  border: 1px solid var(--stroke);
  background: rgba(6, 12, 24, 0.6);
}
.result-cell small {
  display: block;
  font-size: 8.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 4px;
}
.result-cell b {
  font-family: var(--mono);
  font-size: 19px;
  font-weight: 600;
  color: var(--ink);
}
.result-cell b.gold { color: var(--gold); }
.result-cell b.mint { color: var(--mint); }
.modal-actions { display: flex; gap: 9px; flex-wrap: wrap; }
.modal-actions .btn { flex: 1; min-width: 120px; }
.modal .key-list {
  display: grid;
  gap: 10px;
  margin: 16px 0 20px;
}
.key-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.45;
}
.key-row b {
  flex: none;
  width: 92px;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mint);
  font-weight: 600;
}
.modal .fine {
  font-size: 10.5px;
  color: var(--faint);
  line-height: 1.6;
  margin-top: 14px;
}

.noscript {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--ink);
  background: var(--bg);
  z-index: 100;
}

/* ── responsive ──────────────────────────────────────────────────────── */

.only-mobile { display: none !important; }

@media (max-width: 980px) {
  :root { --topbar-h: 64px; }

  .only-mobile { display: grid !important; }
  .brand-mark { width: 34px; height: 34px; font-size: 17px; border-radius: 10px; }
  .brand-copy h1 { font-size: 14px; letter-spacing: 0.28em; }
  .brand-copy p { display: none; }
  .mode-tabs button { padding: 8px 14px; font-size: 11.5px; }
  #topbar { gap: 10px; padding: var(--safe-top) 12px 0; }
  .top-actions { gap: 6px; }
  .icon-btn { width: 36px; height: 36px; }

  .panel {
    left: 8px;
    right: 8px;
    bottom: calc(8px + var(--safe-bottom));
    top: auto;
    width: auto;
    max-height: 71vh;
    padding: 14px 16px 18px;
    border-radius: 22px;
    transform: translateY(calc(100% + 20px));
    opacity: 0;
    pointer-events: none;
  }
  .panel.open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }
  .panel:not(.open) .sheet-grip { opacity: 0.4; }
  .sheet-grip {
    display: flex;
    justify-content: center;
    padding: 2px 0 10px;
    margin-top: -4px;
  }
  .sheet-grip span {
    width: 42px;
    height: 4px;
    border-radius: 2px;
    background: rgba(140, 190, 230, 0.28);
  }
  .build-hud { right: 12px; bottom: calc(12px + var(--safe-bottom)); font-size: 9.5px; }
  .build-hint { display: none; }
  .panel-head { margin-bottom: 14px; }
  .panel-head h2 { font-size: 18px; }

  .hud-top { padding: calc(10px + var(--safe-top)) 12px 0; gap: 8px; }
  .hud-chip { font-size: 10.5px; padding: 8px 12px; gap: 7px; min-height: 34px; }
  .timer { padding: 5px 16px 6px; border-radius: 13px; }
  .timer span { font-size: 20px; }
  .score { font-size: 12px; min-width: 44px; }
  .hud-right { gap: 6px; }
  .hud-right .icon-btn { width: 36px; height: 36px; border-radius: 12px; }
  .hud-bottom { padding: 0 12px calc(12px + var(--safe-bottom)); }
  .minimap-wrap { width: 106px; height: 106px; }
  .control-hint { font-size: 9.5px; max-width: 180px; }
  .toast { bottom: 128px; font-size: 11px; }
}

@media (max-width: 560px) {
  #topbar { gap: 7px; padding: var(--safe-top) 10px 0; padding-left: calc(10px + env(safe-area-inset-left, 0px)); padding-right: calc(10px + env(safe-area-inset-right, 0px)); }
  .brand-copy { display: none; }
  .brand { gap: 0; }
  .brand-mark { width: 34px; height: 34px; }
  .mode-tabs { padding: 3px; }
  .mode-tabs button { padding: 7px 12px; font-size: 11px; }
  .top-actions { gap: 4px; }
  .icon-btn { width: 33px; height: 33px; border-radius: 10px; font-size: 13px; }
  .panel {
    background: linear-gradient(180deg, rgba(12, 21, 38, 0.98), rgba(6, 11, 22, 0.99));
  }
  .build-meta { font-size: 9px; letter-spacing: 0; }
  .difficulty-grid { grid-template-columns: 1fr 1fr; }
  .diff-card { padding: 9px 10px; }
  .diff-card .diff-name { font-size: 12px; }
  .diff-card.custom { grid-column: span 2; }
  .algo-grid { grid-template-columns: repeat(3, 1fr); }
  .algo-btn { font-size: 10px; padding: 9px 2px; }
  .seg button { font-size: 10px; padding: 7px 2px; }
  .hud-chip #objectiveText { max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .timer { position: static; transform: none; }
  .hud-top { align-items: flex-start; }
  .hud-right { margin-left: 0; }
  .hud-top { justify-content: flex-start; }
  .timer { margin-left: auto; }
}

@media (max-width: 380px) {
  .difficulty-grid { grid-template-columns: 1fr; }
  .diff-card.custom { grid-column: span 1; }
  .build-meta { font-size: 8.5px; }
  .build-hud { right: 10px; }
}

@media (max-height: 620px) and (orientation: landscape) {
  .panel { max-height: 88vh; }
  .hud-top { padding-top: calc(6px + var(--safe-top)); }
  .timer span { font-size: 17px; }
  .minimap-wrap { width: 88px; height: 88px; }
  .hud-bottom { padding-bottom: calc(8px + var(--safe-bottom)); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
  }
}

body.playing #topbar,
body.playing .panel,
body.playing .build-hud {
  display: none !important;
}
body.playing { cursor: crosshair; }
@media (pointer: coarse) {
  body.playing { cursor: auto; }
}