.game-root[data-game="four-in-a-row"] { min-height: 34rem; }

.fir-num {
  display: inline-block;
  min-width: 3ch;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.fir-new {
  min-width: 8.6rem;
  white-space: nowrap;
}

.fir-stage {
  width: min(100%, 32rem);
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  user-select: none;
}

.fir-status {
  min-height: 4.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.12rem;
  text-align: center;
}

.fir-line,
.fir-note {
  margin: 0;
  line-height: 1.35;
  min-height: 1.35em;
}

.fir-line { color: #f4f0e8; }

.fir-note {
  color: #d5ddd6;
  font-size: 0.95rem;
}

.fir-note.is-good { color: #e0b948; }

.fir-legend {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  min-height: 2.75rem;
}

.fir-who {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 2.75rem;
  margin: 0;
  padding: 0 0.4rem;
  border-radius: 10px;
  color: #d5ddd6;
  font-size: 0.95rem;
  box-shadow: inset 0 0 0 1px transparent;
}

.fir-who.is-turn {
  color: #f4f0e8;
  box-shadow: inset 0 0 0 1px rgba(224, 185, 72, 0.75);
}

.fir-avatar {
  width: 1.65rem;
  height: 1.65rem;
}

.fir-key {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50%;
  flex: 0 0 auto;
  box-shadow: inset 0 -2px 2px rgba(60, 30, 10, 0.28);
}

.fir-key.is-you,
.fir-disc.is-you::before {
  background: radial-gradient(circle at 35% 30%, #fff6d4 0%, #f0d078 32%, #e0b948 62%, #b8923a 100%);
}

.fir-key.is-him,
.fir-disc.is-him::before {
  background: radial-gradient(circle at 35% 30%, #f6d2cc 0%, #d15a52 34%, #8f2f2c 68%, #641f1c 100%);
}

.fir-board {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.35rem;
  padding: 0.65rem;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent 42%),
    #14241e;
  box-shadow:
    inset 0 0 0 1px rgba(232, 217, 168, 0.38),
    inset 0 12px 24px rgba(0, 0, 0, 0.25);
  overflow: hidden;
}

.fir-board.is-live {
  box-shadow:
    inset 0 0 0 1px rgba(224, 185, 72, 0.75),
    inset 0 12px 24px rgba(0, 0, 0, 0.25);
}

.fir-col {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  display: grid;
  grid-template-rows: repeat(6, minmax(0, 1fr));
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: inherit;
  min-width: 0;
  cursor: default;
  touch-action: manipulation;
}

.fir-col:focus-visible {
  outline: 3px solid #e0b948;
  outline-offset: -3px;
}

.fir-col.is-open { cursor: pointer; }

.fir-col.is-open:hover,
.fir-col.is-open:focus-visible {
  background: rgba(255, 255, 255, 0.04);
}

.fir-slot {
  position: relative;
  aspect-ratio: 1;
  min-width: 0;
  min-height: 0;
}

.fir-slot::before {
  content: "";
  display: block;
  width: 84%;
  height: 84%;
  margin: 8%;
  border-radius: 50%;
  background: #0c1612;
  box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.55);
}

.fir-slot.is-preview::after {
  content: "";
  position: absolute;
  inset: 9%;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(255, 246, 212, 0.9), rgba(224, 185, 72, 0.45) 70%);
  pointer-events: none;
}

.fir-disc {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  z-index: 1;
  pointer-events: none;
}

.fir-disc::before {
  content: "";
  position: absolute;
  inset: 9%;
  border-radius: 50%;
  box-shadow: inset 0 -3px 4px rgba(60, 30, 10, 0.28);
}

.fir-disc.is-falling {
  z-index: 2;
  animation: fir-drop var(--drop-ms, 280ms) cubic-bezier(0.42, 0, 0.9, 0.55) both;
}

.fir-disc.is-last::before {
  box-shadow:
    inset 0 0 0 2px rgba(255, 253, 247, 0.72),
    inset 0 -3px 4px rgba(60, 30, 10, 0.28);
}

.fir-disc.is-win::before {
  box-shadow:
    0 0 0 2px #fff6df,
    inset 0 -3px 4px rgba(60, 30, 10, 0.28);
}

@keyframes fir-drop {
  from { transform: translateY(var(--from)); }
  to { transform: translateY(var(--to)); }
}

@media (prefers-reduced-motion: reduce) {
  .fir-disc.is-falling { animation: none; }
}

@media (max-width: 640px) {
  .fir-board,
  .fir-col { gap: 0.18rem; }
  .fir-board { padding: 0.35rem; }
}

@media (min-width: 720px) {
  .game-root[data-game="four-in-a-row"] { min-height: 44rem; }
}