:root {
  --bg: #0e1122;
  --card: #1b2142;
  --card-2: #232a52;
  --border: rgba(255, 255, 255, 0.08);
  --text: #eef1ff;
  --muted: #8b93c4;
  --c1: #ff6b6b;
  --c2: #feca57;
  --c3: #48dbfb;
  --accent: #7c5cff;
  --accent-2: #00d2ff;
  --danger: #ff4757;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  background:
    radial-gradient(1200px 600px at 50% -10%, #2a2f63 0%, transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  -webkit-tap-highlight-color: transparent;
}

.app {
  max-width: 520px;
  margin: 0 auto;
  padding: 14px 14px calc(24px + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 14px;
  user-select: none;
}

/* ---------- Barra superiore ---------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

h1 {
  margin: 0;
  font-size: 1.3rem;
  letter-spacing: 0.3px;
}

/* ---------- Coppie di dadi: 3 righe x 2 coppie ---------- */

.pairs {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pair-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 8px;
}

.pair-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: var(--card-2);
  border-radius: 12px;
  padding: 8px 4px;
  position: relative;
}

.op {
  color: var(--muted);
  font-size: clamp(0.85rem, 3.5vw, 1.1rem);
  font-weight: 700;
}

.die {
  width: 26%;
  aspect-ratio: 1;
  background: #fff;
  border-radius: 14%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  padding: 2%;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.35), inset 0 -3px 0 rgba(0, 0, 0, 0.15);
}

.die.idle {
  place-items: center;
  color: #b9b9c9;
  font-size: clamp(0.9rem, 4vw, 1.2rem);
  font-weight: 800;
}

/* i pallini: neri, grandi, come nei dadi veri */
.pip {
  width: 72%;
  height: 72%;
  border-radius: 50%;
  background: #0c0e1d;
  align-self: center;
  justify-self: center;
}

.p1 { grid-area: 1 / 1; }
.p2 { grid-area: 1 / 2; }
.p3 { grid-area: 1 / 3; }
.p4 { grid-area: 2 / 1; }
.p5 { grid-area: 2 / 2; }
.p6 { grid-area: 2 / 3; }
.p7 { grid-area: 3 / 1; }
.p8 { grid-area: 3 / 2; }
.p9 { grid-area: 3 / 3; }

.die.pop {
  animation: pop 0.25s ease-out;
}

@keyframes pop {
  from { transform: scale(1.18); }
  to { transform: scale(1); }
}

.sum-chip {
  width: 22%;
  aspect-ratio: 1;
  min-width: 30px;
  max-width: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: clamp(0.95rem, 4vw, 1.15rem);
  font-weight: 800;
  border: 2px solid var(--muted);
  background: rgba(255, 255, 255, 0.04);
  transition: opacity 0.2s, transform 0.2s;
}

.pair-0 .sum-chip { color: var(--c1); border-color: var(--c1); }
.pair-1 .sum-chip { color: var(--c2); border-color: var(--c2); }
.pair-2 .sum-chip { color: var(--c3); border-color: var(--c3); }

/* coppia FALLITO: la sua somma è il numero selezionato */
.sum-chip.fallito {
  background: rgba(255, 71, 87, 0.95);
  border-color: #fff;
  color: #fff;
  animation: pulse 1.2s ease-in-out infinite;
}

.fallito-badge {
  position: absolute;
  top: -7px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--danger);
  color: #fff;
  font-size: 0.55rem;
  font-weight: 900;
  letter-spacing: 0.5px;
  padding: 2px 6px;
  border-radius: 6px;
  pointer-events: none;
  animation: badgeIn 0.2s both;
}

@keyframes badgeIn {
  from { transform: translateX(-50%) scale(0.6); opacity: 0; }
  to { transform: translateX(-50%) scale(1); opacity: 1; }
}

.sum-chip.used {
  opacity: 0.25;
  transform: scale(0.9);
  text-decoration: line-through;
}

.sum-chip.empty {
  opacity: 0.3;
}

/* ---------- Pulsante di lancio ---------- */

.roll-btn {
  height: 62px;
  border: none;
  border-radius: 18px;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 20px rgba(124, 92, 255, 0.35);
  cursor: pointer;
  transition: transform 0.1s, opacity 0.2s;
  touch-action: manipulation;
}

.roll-btn:active {
  transform: scale(0.97);
}

.roll-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

/* ---------- Tabellone dei numeri ---------- */

.board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.board.locked .tile {
  pointer-events: none;
  opacity: 0.45;
}

.tile {
  aspect-ratio: 1;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--card-2);
  color: var(--text);
  font-size: clamp(1.3rem, 6vw, 1.7rem);
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.1s, background 0.2s, opacity 0.2s, box-shadow 0.2s;
  touch-action: manipulation;
  position: relative;
}

.tile:active {
  transform: scale(0.94);
}

/* numero selezionato dall'utente (trappola per i tiri delle coppie) */
.tile.selected {
  border-color: var(--accent-2);
  background: rgba(0, 210, 255, 0.12);
  box-shadow: 0 0 0 2px rgba(0, 210, 255, 0.55);
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 0 2px rgba(255, 71, 87, 0.35), 0 0 18px rgba(255, 71, 87, 0.25);
  }
  50% {
    box-shadow: 0 0 0 2px rgba(255, 71, 87, 0.6), 0 0 30px rgba(255, 71, 87, 0.45);
  }
}

/* ---------- Accessibilità ---------- */

@media (prefers-reduced-motion: reduce) {
  .die.pop,
  .sum-chip.fallito,
  .fallito-badge {
    animation: none;
  }
}