@import url("https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Share+Tech+Mono&display=swap");

:root {
  --bg-deep: #0a0e1a;
  --bg-card: #111827;
  --bg-cell: #1a2234;
  --bg-cell-hover: #22304a;
  --accent-x: #00e5ff;
  --accent-o: #ff6b6b;
  --accent-glow-x: rgba(0, 229, 255, 0.35);
  --accent-glow-o: rgba(255, 107, 107, 0.35);
  --text-primary: #e2e8f0;
  --text-muted: #64748b;
  --border: #2a3550;
  --winner-bg: rgba(0, 229, 255, 0.08);
  --radius: 12px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: "Share Tech Mono", monospace;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  background-image:
    radial-gradient(
      ellipse at 20% 50%,
      rgba(0, 229, 255, 0.06) 0%,
      transparent 60%
    ),
    radial-gradient(
      ellipse at 80% 20%,
      rgba(255, 107, 107, 0.05) 0%,
      transparent 50%
    );
}

/* ── Title ── */
h1 {
  font-family: "Orbitron", sans-serif;
  font-weight: 900;
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  letter-spacing: 6px;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--accent-x), var(--accent-o));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 28px;
}

/* ── Setup Card (row-size input) ── */
.setup-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 36px;
  text-align: center;
  max-width: 340px;
  width: 100%;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.setup-card label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.row-input-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 20px;
}

.row-btn {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-cell);
  color: var(--text-primary);
  font-size: 1.3rem;
  font-family: "Orbitron", sans-serif;
  cursor: pointer;
  transition:
    background 0.2s,
    border-color 0.2s,
    box-shadow 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.row-btn:hover,
.row-btn:focus-visible {
  background: var(--bg-cell-hover);
  border-color: var(--accent-x);
  box-shadow: 0 0 10px var(--accent-glow-x);
  outline: none;
}

#rowCount {
  font-family: "Orbitron", sans-serif;
  font-weight: 700;
  font-size: 1.6rem;
  color: var(--accent-x);
  min-width: 28px;
  text-align: center;
}

.btn-start {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-x), #0099b3);
  color: #0a0e1a;
  font-family: "Orbitron", sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    filter 0.2s,
    transform 0.1s;
}
.btn-start:hover {
  filter: brightness(1.15);
}
.btn-start:active {
  transform: scale(0.97);
}
.btn-start:focus-visible {
  outline: 2px solid var(--accent-x);
  outline-offset: 3px;
}

/* ── Game Wrapper (hidden until started) ── */
.game-wrapper {
  display: none;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 520px;
}

/* ── Scoreboard ── */
.scoreboard {
  display: flex;
  gap: 16px;
  margin-bottom: 18px;
  width: 100%;
}
.score-card {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 10px;
  text-align: center;
  transition:
    border-color 0.3s,
    box-shadow 0.3s;
}
.score-card.active-x {
  border-color: var(--accent-x);
  box-shadow: 0 0 12px var(--accent-glow-x);
}
.score-card.active-o {
  border-color: var(--accent-o);
  box-shadow: 0 0 12px var(--accent-glow-o);
}

.score-card .player-label {
  font-family: "Orbitron", sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 2px;
}
.score-card.x-card .player-label {
  color: var(--accent-x);
}
.score-card.o-card .player-label {
  color: var(--accent-o);
}

.score-card .score-value {
  font-family: "Orbitron", sans-serif;
  font-weight: 900;
  font-size: 2rem;
  margin-top: 4px;
}

/* ── Turn Indicator ── */
.turn-indicator {
  font-size: 0.78rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 14px;
  min-height: 18px;
}
.turn-indicator span {
  font-weight: 700;
}
.turn-indicator .turn-x {
  color: var(--accent-x);
}
.turn-indicator .turn-o {
  color: var(--accent-o);
}

/* ── Board ── */
.board {
  display: grid;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.cell {
  aspect-ratio: 1;
  background: var(--bg-cell);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition:
    background 0.2s,
    border-color 0.2s,
    box-shadow 0.2s,
    transform 0.1s;
  outline: none;
  position: relative;
  overflow: hidden;
}
.cell:hover,
.cell:focus-visible {
  background: var(--bg-cell-hover);
  border-color: var(--border);
  box-shadow: inset 0 0 14px rgba(255, 255, 255, 0.04);
}
.cell:focus-visible {
  border-color: #fff;
  box-shadow:
    0 0 0 2px rgba(255, 255, 255, 0.6),
    inset 0 0 14px rgba(255, 255, 255, 0.04);
}
.cell:active {
  transform: scale(0.94);
}

.cell .value {
  font-family: "Orbitron", sans-serif;
  font-weight: 900;
  font-size: clamp(1.2rem, 5vw, 2.2rem);
  transition:
    color 0.2s,
    text-shadow 0.3s;
}

.cell.cell--X .value {
  color: var(--accent-x);
  text-shadow: 0 0 12px var(--accent-glow-x);
}
.cell.cell--O .value {
  color: var(--accent-o);
  text-shadow: 0 0 12px var(--accent-glow-o);
}

/* winning cell pulse */
.cell.winner {
  animation: winPulse 0.6s ease forwards;
}
@keyframes winPulse {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.08);
  }
  100% {
    transform: scale(1);
  }
}

/* ── Bottom Buttons ── */
.btn-row {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  width: 100%;
}
.btn-row button {
  flex: 1;
  padding: 11px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: "Orbitron", sans-serif;
  font-size: 0.72rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    background 0.2s,
    border-color 0.2s,
    box-shadow 0.2s;
}
.btn-row button:hover,
.btn-row button:focus-visible {
  background: var(--bg-cell-hover);
  border-color: var(--accent-x);
  box-shadow: 0 0 10px var(--accent-glow-x);
  outline: none;
}

/* ── Message overlay (win / draw) ── */
.msg-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 14, 26, 0.82);
  backdrop-filter: blur(4px);
  z-index: 100;
  align-items: center;
  justify-content: center;
}
.msg-overlay.show {
  display: flex;
}
.msg-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 40px 48px;
  text-align: center;
  box-shadow: 0 8px 48px rgba(0, 0, 0, 0.5);
  animation: popIn 0.25s cubic-bezier(0.17, 0.67, 0.29, 1.27);
}
@keyframes popIn {
  from {
    transform: scale(0.82);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}
.msg-box h2 {
  font-family: "Orbitron", sans-serif;
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: 2px;
  margin-bottom: 8px;
}
.msg-box h2.win-x {
  color: var(--accent-x);
  text-shadow: 0 0 18px var(--accent-glow-x);
}
.msg-box h2.win-o {
  color: var(--accent-o);
  text-shadow: 0 0 18px var(--accent-glow-o);
}
.msg-box h2.draw {
  color: var(--text-muted);
}

.msg-box p {
  color: var(--text-muted);
  font-size: 0.82rem;
  letter-spacing: 1px;
  margin-bottom: 22px;
}

.msg-box button {
  padding: 10px 32px;
  border: none;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-x), #0099b3);
  color: #0a0e1a;
  font-family: "Orbitron", sans-serif;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  cursor: pointer;
  transition: filter 0.2s;
}
.msg-box button:hover {
  filter: brightness(1.15);
}
.msg-box button:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

/* ── Keyboard hint ── */
.kb-hint {
  margin-top: 20px;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-align: center;
}
.kb-hint kbd {
  display: inline-block;
  background: var(--bg-cell);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 7px;
  font-family: "Share Tech Mono", monospace;
  font-size: 0.68rem;
  color: var(--text-primary);
  margin: 0 2px;
}