:root {
  --panel: rgba(28, 31, 36, 0.92);
  --border: #3a4048;
  --text: #e6e6e0;
  --muted: #9aa0a8;
  --amber: #f0a830;
  --green: #6fcf62;
  --red: #e04848;
  --cyan: #4fc3f7;
  --sat: env(safe-area-inset-top, 0px);
  --sab: env(safe-area-inset-bottom, 0px);
  --sal: env(safe-area-inset-left, 0px);
  --sar: env(safe-area-inset-right, 0px);
  --font: "DIN Condensed", "Roboto Condensed", "Arial Narrow", "Helvetica Neue", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #0b0f18;
  color: var(--text);
  font-family: var(--font);
  overscroll-behavior: none;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
}

#app { position: fixed; inset: 0; overflow: hidden; }

#game {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
  touch-action: none;
}

.hidden { display: none !important; }

/* ------------------------------------------------------------------ HUD */
#hud { position: absolute; inset: 0; pointer-events: none; }

.hud-left {
  position: absolute;
  top: calc(var(--sat) + 8px);
  left: calc(var(--sal) + 8px);
  display: flex; flex-direction: column; gap: 6px; align-items: flex-start;
}
.btn-row { display: flex; gap: 6px; }
.icon-btn {
  pointer-events: auto;
  width: 40px; height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  display: grid; place-items: center;
  padding: 0;
  touch-action: manipulation;
}
.icon-btn svg { width: 22px; height: 22px; fill: currentColor; }
.icon-btn:active { background: #2a2f37; }
#btn-mute .snd-off { display: none; }
#btn-mute.muted .snd-on { display: none; }
#btn-mute.muted .snd-off { display: block; }

.stat {
  background: rgba(28, 31, 36, 0.72);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 8px 2px;
  font-size: 18px; line-height: 1.1;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}
.stat .lbl { color: var(--muted); font-size: 12px; text-transform: uppercase; margin-right: 6px; letter-spacing: 0.08em; }

.knife-ind {
  display: flex; align-items: center; gap: 6px;
  background: rgba(28, 31, 36, 0.6);
  border: 1px dashed #4a505a;
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em;
  color: #5c636d;
  transition: all .2s;
}
.knife-ind svg { width: 30px; height: 12px; opacity: .3; filter: grayscale(1); }
.knife-ind.on {
  color: #1c1f24; background: var(--amber); border: 1px solid #ffd27a;
  box-shadow: 0 0 14px rgba(240, 168, 48, .6);
}
.knife-ind.on svg { opacity: 1; filter: none; }

.hud-center {
  position: absolute;
  top: calc(var(--sat) + 4px);
  left: 50%; transform: translateX(-50%);
  text-align: center;
}
#hud-timer {
  font-size: 46px; font-weight: 700; line-height: 1;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 2px 0 #000, 0 0 12px rgba(0, 0, 0, .8);
  letter-spacing: 0.02em;
}
#hud-timer.urgent { color: var(--red); animation: pulse 1s infinite; }
@keyframes pulse {
  0% { transform: scale(1.25); }
  30% { transform: scale(1); }
  100% { transform: scale(1); }
}
#hud-level {
  font-size: 14px; color: var(--amber);
  text-transform: uppercase; letter-spacing: 0.14em;
  text-shadow: 0 1px 0 #000;
}

.hud-right {
  position: absolute;
  top: calc(var(--sat) + 8px);
  right: calc(var(--sar) + 8px);
}
#minimap {
  display: block;
  background: rgba(11, 15, 24, 0.55);
  border: 1px solid rgba(58, 64, 72, 0.9);
  border-radius: 4px;
  opacity: 0.88;
}

#toasts {
  position: absolute; left: 0; right: 0;
  top: calc(var(--sat) + min(132px, 22vh));
  display: flex; flex-direction: column; align-items: center; gap: 6px;
}
.toast {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 4px solid var(--amber);
  padding: 7px 14px 5px;
  border-radius: 6px;
  font-size: 19px; letter-spacing: 0.04em;
  animation: toast 1.9s ease forwards;
  box-shadow: 0 4px 14px rgba(0, 0, 0, .5);
}
.toast.good { border-left-color: var(--green); }
.toast.bad { border-left-color: var(--red); }
@keyframes toast {
  0% { opacity: 0; transform: translateY(-10px) scale(.9); }
  10% { opacity: 1; transform: none; }
  80% { opacity: 1; }
  100% { opacity: 0; transform: translateY(-6px); }
}

#banner {
  position: absolute; left: 0; right: 0; top: 19%;
  text-align: center;
  text-shadow: 0 3px 0 #000, 0 0 24px rgba(0, 0, 0, .9);
}
#banner .big { font-size: 64px; font-weight: 700; letter-spacing: 0.04em; line-height: 1; }
#banner .small { font-size: 22px; color: var(--text); margin-top: 6px; letter-spacing: 0.06em; }
#banner.go .big { color: var(--green); animation: go .6s ease-out forwards; }
#banner.win .big { color: var(--green); }
@keyframes go { 0% { transform: scale(1.6); opacity: 0; } 25% { transform: scale(1); opacity: 1; } 100% { opacity: 0; transform: scale(1.05); } }
#banner.pop .big { animation: pop .35s ease-out; }
@keyframes pop { 0% { transform: scale(.6); opacity: 0; } 100% { transform: none; opacity: 1; } }

/* -------------------------------------------------------------- screens */
.screen {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  padding: calc(var(--sat) + 16px) calc(var(--sar) + 16px) calc(var(--sab) + 16px) calc(var(--sal) + 16px);
  background: radial-gradient(ellipse at center, rgba(11, 15, 24, 0.35) 0%, rgba(11, 15, 24, 0.82) 75%);
  animation: fadein .25s ease;
  touch-action: manipulation;
}
@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }

.panel {
  width: min(360px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px 20px 18px;
  text-align: center;
  box-shadow: 0 10px 40px rgba(0, 0, 0, .6);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}
.panel h2 { margin: 0 0 14px; font-size: 40px; letter-spacing: 0.04em; line-height: 1; }
.panel h2.good { color: var(--green); }
.panel h2.bad { color: var(--red); font-size: 52px; }

.title {
  margin: 0 0 10px;
  font-size: clamp(36px, 13vw, 56px); line-height: 0.95; letter-spacing: 0.02em;
  color: var(--text);
  text-transform: uppercase;
  text-shadow: 0 3px 0 #000;
}
.title span { color: var(--amber); }
.lead { font-size: 19px; line-height: 1.3; margin: 0 0 14px; color: var(--text); }
.legend { list-style: none; padding: 0; margin: 0 0 12px; text-align: left; font-size: 15px; color: #c8ccd2; line-height: 1.25; }
.legend li { display: flex; gap: 10px; align-items: center; margin-bottom: 7px; }
.dot { flex: none; width: 22px; height: 22px; border-radius: 50%; display: inline-block; }
.dot.yellow { background: rgba(240, 190, 70, .18); border: 2px solid rgba(245, 200, 80, .8); }
.dot.red { border: 2px dashed var(--red); background: rgba(224, 72, 72, .1); }
.dot.knife { background: radial-gradient(circle, #fff6d8 0, #f0a830 45%, rgba(240,168,48,0) 72%); }
.controls { font-size: 14px; color: var(--muted); margin: 0 0 14px; line-height: 1.3; }
.record { margin: 12px 0 0; color: var(--muted); font-size: 17px; letter-spacing: 0.04em; }
.record b { color: var(--amber); font-variant-numeric: tabular-nums; }

.btn {
  pointer-events: auto;
  display: block; width: 100%;
  margin-top: 10px;
  padding: 14px 10px 11px;
  font: 700 24px/1 var(--font);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text);
  background: #2a2f37;
  border: 1px solid var(--border);
  border-radius: 8px;
  touch-action: manipulation;
  cursor: pointer;
}
.btn.primary { background: var(--amber); color: #1c1f24; border-color: #ffd27a; }
.btn:active { transform: translateY(1px); filter: brightness(.92); }

.rows { margin: 0 0 8px; font-size: 20px; }
.rows > div { display: flex; justify-content: space-between; padding: 6px 2px; border-bottom: 1px solid #2c3138; }
.rows span { color: var(--muted); }
.rows b { font-variant-numeric: tabular-nums; }
.hint { color: var(--muted); font-size: 15px; margin: 10px 0 4px; }
.newbest { color: var(--amber); font-size: 22px; margin: 10px 0 0; letter-spacing: 0.06em; animation: pulse 1.2s infinite; }

#fps {
  position: absolute; bottom: calc(var(--sab) + 4px); left: 4px;
  font: 11px monospace; color: #8f8; background: rgba(0,0,0,.5); padding: 2px 4px;
  pointer-events: none;
}

@media (max-height: 640px) {
  .title { font-size: 44px; }
  .lead { font-size: 16px; }
  .legend { font-size: 13px; }
  .btn { padding: 11px 10px 9px; font-size: 21px; }
}

/* start level picker */
.level-pick { display: flex; align-items: center; justify-content: center; gap: 8px; margin: 0 0 14px; }
.level-pick label { font-size: 15px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; margin-right: 4px; }
.level-pick .step {
  width: 44px; height: 44px; border-radius: 8px; font-size: 24px; line-height: 1; font-weight: 700;
  border: 1px solid var(--border); background: rgba(255, 255, 255, 0.04); color: var(--text);
  touch-action: manipulation; cursor: pointer;
}
.level-pick .step:active { background: rgba(240, 168, 48, 0.25); }
.level-pick input {
  width: 72px; height: 44px; border-radius: 8px; text-align: center;
  font: 700 22px var(--font); /* >= 16px so iOS does not zoom on focus */
  color: var(--amber); background: rgba(0, 0, 0, 0.35); border: 1px solid var(--border);
  -webkit-user-select: text; user-select: text; touch-action: manipulation;
  -moz-appearance: textfield; appearance: textfield;
}
.level-pick input::-webkit-outer-spin-button,
.level-pick input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.level-pick input:focus { outline: 2px solid var(--amber); outline-offset: 1px; }