/* Reakční doba – v3 (tvary) */
:root{
  --bg: #0b1220;
  --card: rgba(255,255,255,.06);
  --card2: rgba(255,255,255,.09);
  --text: #e5e7eb;
  --muted: rgba(229,231,235,.75);
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius: 18px;
  --safe-top: env(safe-area-inset-top);
  --safe-right: env(safe-area-inset-right);
  --safe-bottom: env(safe-area-inset-bottom);
  --safe-left: env(safe-area-inset-left);
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  background: radial-gradient(1200px 800px at 50% 0%, rgba(96,165,250,.18), transparent 60%),
              radial-gradient(900px 600px at 90% 30%, rgba(34,197,94,.10), transparent 60%),
              radial-gradient(900px 600px at 10% 40%, rgba(244,63,94,.10), transparent 60%),
              var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

button, input{ font: inherit; }
.app{
  height: 100%;
  display: grid;
  place-items: center;
  padding: calc(16px + var(--safe-top)) calc(16px + var(--safe-right)) calc(16px + var(--safe-bottom)) calc(16px + var(--safe-left));
  user-select: none;
}

.screen{ display: none; width: min(820px, 100%); position: relative; }
.screen.active{ display: block; }

.card{
  background: var(--card);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

h1{ margin: 0 0 8px; font-size: 34px; letter-spacing: .2px; }
h2{ margin: 0 0 8px; font-size: 26px; }
p{ margin: 0 0 16px; line-height: 1.4; }
.muted{ color: var(--muted); }
code{ background: rgba(255,255,255,.08); padding: 2px 6px; border-radius: 10px; }

.grid4{ display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.grid2{ display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.stack{ display: grid; gap: 10px; margin: 14px 0 18px; }

.big{
  width: 100%;
  border: 1px solid rgba(255,255,255,.14);
  background: var(--card2);
  color: var(--text);
  padding: 14px 16px;
  border-radius: 16px;
  cursor: pointer;
  font-size: 18px;
  font-weight: 650;
  box-shadow: 0 8px 18px rgba(0,0,0,.25);
}
.big:active{ transform: translateY(1px); }
.big.primary{ border-color: rgba(96,165,250,.45); background: rgba(96,165,250,.20); }
.big[disabled]{ opacity: .45; cursor: not-allowed; }

.ghost{
  border: 1px solid rgba(255,255,255,.14);
  background: transparent;
  color: var(--text);
  padding: 10px 14px;
  border-radius: 14px;
  cursor: pointer;
}
.ghost:active{ transform: translateY(1px); }

.row{ display: flex; gap: 12px; align-items: center; }
.row.space{ justify-content: flex-end; }

.radio{
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 12px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 14px;
}
.radio input{ margin-top: 4px; transform: scale(1.1); }

/* Fullscreen button in menus */
.fs-btn{
  position: absolute;
  top: calc(10px + var(--safe-top));
  right: calc(10px + var(--safe-right));
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.08);
  color: var(--text);
  cursor: pointer;
  box-shadow: 0 10px 22px rgba(0,0,0,.25);
}
.fs-btn:active{ transform: translateY(1px); }

/* Game */
.game{
  --winnerTint: rgba(0,0,0,0);
  position: relative;
  width: min(980px, 100%);
  height: min(720px, 86vh);
  border-radius: 26px;
  background: rgba(0,0,0,.15);
  border: 1px solid rgba(255,255,255,.10);
  box-shadow: var(--shadow);
  overflow: hidden;
  touch-action: manipulation;
}

.game.winner-tint{
  background:
    radial-gradient(900px 600px at 50% 40%, rgba(255,255,255,.05), transparent 60%),
    linear-gradient(0deg, var(--winnerTint), var(--winnerTint)),
    rgba(0,0,0,.15);
}

.corner{
  position: absolute;
  width: 24%;
  height: 24%;
  border: none;
  cursor: pointer;
  display: grid;
  align-content: start;
  gap: 4px;
  padding: 10px;
  color: #0b1220;
  font-weight: 900;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}
.corner:active{ filter: brightness(.95); transform: scale(.996); }
.corner.hidden{ display: none; }

.corner-name{
  font-size: 12px;
  opacity: .92;
  text-transform: uppercase;
  letter-spacing: .9px;
}
.corner-metric{
  font-size: 26px;
  line-height: 1;
  text-shadow: 0 2px 0 rgba(255,255,255,.25);
}

.c-blue{ background: #60a5fa; top: 0; left: 0; border-bottom-right-radius: 26px; }
.c-green{ background: #22c55e; top: 0; right: 0; border-bottom-left-radius: 26px; text-align: right; }
.c-red{ background: #f43f5e; bottom: 0; left: 0; border-top-right-radius: 26px; }
.c-yellow{ background: #f59e0b; bottom: 0; right: 0; border-top-left-radius: 26px; text-align: right; }

.center{
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 2;
  pointer-events: none;
}

.frame{
  width: min(520px, 78vw);
  height: min(420px, 44vh);
  border-radius: 20px;
  border: 3px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.04);
  display: grid;
  place-items: center;
  box-shadow: 0 12px 26px rgba(0,0,0,.24);
  transition: border-color .15s ease, background .15s ease;
}
.frame.target{
  border-color: rgba(34,197,94,.95);
  background: rgba(34,197,94,.06);
}

.shape{
  width: min(200px, 38vw);
  height: min(200px, 38vw);
  filter: drop-shadow(0 10px 16px rgba(0,0,0,.35));
}
.shape.hidden{ display: none; }

.start{
  pointer-events: auto;
  position: absolute;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.10);
  color: var(--text);
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 18px;
  font-weight: 900;
  cursor: pointer;
  box-shadow: 0 10px 22px rgba(0,0,0,.25);
}
.start:active{ transform: translateX(-50%) translateY(1px); }

.countdown{
  position: absolute;
  bottom: 84px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 56px;
  font-weight: 1000;
  letter-spacing: 1px;
  opacity: .96;
  pointer-events: none;
}
.countdown.hidden{ display: none; }

.results{
  pointer-events: auto;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
  width: min(760px, calc(100% - 32px));
  background: rgba(17,24,39,.95);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 20px;
  padding: 14px;
  box-shadow: 0 18px 46px rgba(0,0,0,.55);
  z-index: 10;
}
.results.hidden{ display: none; }

.results-top{
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 4px 10px;
  align-items: center;
  margin-bottom: 10px;
}
.results-title{ font-size: 20px; font-weight: 1000; }
.results-sub{ color: var(--muted); font-size: 13px; }

.pill-btn{
  grid-row: 1 / span 2;
  justify-self: end;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 999px;
  padding: 7px 10px;
  font-size: 13px;
  color: var(--text);
  cursor: pointer;
}
.pill-btn:active{ transform: translateY(1px); }

.results-list{
  display: grid;
  gap: 8px;
  margin: 8px 0 12px;
}
.result-row{
  display: grid;
  grid-template-columns: 34px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
}
.badge{
  width: 34px; height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-weight: 1000;
  color: #0b1220;
}
.small{ font-size: 13px; color: var(--muted); }
.points{ font-weight: 1000; }

@media (max-width: 520px){
  .game{ height: 92vh; }
  .corner{ width: 26%; height: 26%; }
  .corner-metric{ font-size: 24px; }
  .frame{ height: min(380px, 44vh); }
}

/* Press feedback for players' corners */
.corner.pressed{
  filter: brightness(1.12) saturate(1.05);
}