/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --o:       #f97316;   /* orange  */
  --o-light: #fff7ed;
  --o-glow:  rgba(249,115,22,0.22);
  --x:       #6366f1;   /* indigo  */
  --x-light: #eef2ff;
  --x-glow:  rgba(99,102,241,0.22);
  --draw:    #94a3b8;
  --bg:      #f8fafc;
  --white:   #ffffff;
  --text:    #1e293b;
  --muted:   #94a3b8;
  --border:  #e2e8f0;
  --radius:  18px;
  --ease:    cubic-bezier(.34,1.56,.64,1);   /* springy */
  --ease2:   cubic-bezier(.4,0,.2,1);
}

/* ── Body ─────────────────────────────────────────────── */
body {
  min-height: 100svh;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
  padding: 1.5rem 1rem;
  position: relative;
  overflow: hidden;
}

/* Decorative background shapes */
.bg-shape {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}
.s1 {
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(249,115,22,0.12), transparent 70%);
  top: -120px; right: -80px;
  animation: shapeDrift 14s ease-in-out infinite alternate;
}
.s2 {
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(99,102,241,0.1), transparent 70%);
  bottom: -100px; left: -80px;
  animation: shapeDrift 18s ease-in-out infinite alternate-reverse;
}
@keyframes shapeDrift {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(30px,20px) scale(1.08); }
}

/* ── App wrapper ──────────────────────────────────────── */
.app {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  animation: appIn .5s var(--ease2) both;
}
@keyframes appIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Header ───────────────────────────────────────────── */
.app-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.app-title {
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text);
}
.app-title span {
  color: var(--o);
}

/* Turn pill */
.turn-bar { display: flex; }
.turn-pill {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: 100px;
  padding: 0.3rem 0.85rem 0.3rem 0.5rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  transition: border-color .25s, box-shadow .25s;
}
.turn-sym {
  width: 26px; height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 800;
  color: white;
  background: var(--o);
  transition: background .25s var(--ease2), transform .3s var(--ease);
}
.turn-pill.x-turn { border-color: var(--x); box-shadow: 0 2px 10px var(--x-glow); }
.turn-pill.x-turn .turn-sym { background: var(--x); transform: rotateY(180deg); }
.turn-pill.o-turn { border-color: var(--o); box-shadow: 0 2px 10px var(--o-glow); }

/* ── Scoreboard ───────────────────────────────────────── */
.scoreboard {
  width: 100%;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
}
.score-cell {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.85rem 0.5rem;
  gap: 0.15rem;
  position: relative;
}
.score-cell + .score-cell::before {
  content: '';
  position: absolute;
  left: 0; top: 20%; bottom: 20%;
  width: 1px;
  background: var(--border);
}
.score-sym {
  font-size: 0.9rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}
.score-sym.o { color: var(--o); }
.score-sym.x { color: var(--x); }
.score-sym.draw { color: var(--draw); font-size: 1.1rem; }
.score-num {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text);
  line-height: 1;
  transition: transform .25s var(--ease);
}
.score-num.bump { animation: scoreBump .4s var(--ease); }
@keyframes scoreBump {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.4); }
  100% { transform: scale(1); }
}
.score-label {
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
}

/* ── Board wrapper ────────────────────────────────────── */
.board-wrap {
  position: relative;
  width: 100%;
}

/* ── Grid ─────────────────────────────────────────────── */
.game {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: 100%;
}

/* ── Cells ────────────────────────────────────────────── */
.box {
  aspect-ratio: 1;
  border-radius: 16px;
  border: 2px solid var(--border);
  background: var(--white);
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: 900;
  color: var(--text);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: border-color .18s, box-shadow .18s, background .18s, transform .18s;
  position: relative;
  overflow: hidden;
}

/* Hover only on empty cells */
.box:not([disabled]):hover {
  border-color: var(--o);
  box-shadow: 0 4px 18px var(--o-glow);
  transform: translateY(-2px);
}

/* Placed animations */
.box.placed-O {
  color: var(--o);
  border-color: rgba(249,115,22,0.3);
  background: var(--o-light);
  animation: pop .35s var(--ease);
}
.box.placed-X {
  color: var(--x);
  border-color: rgba(99,102,241,0.3);
  background: var(--x-light);
  animation: pop .35s var(--ease);
}
@keyframes pop {
  0%   { transform: scale(0.5); opacity: 0.4; }
  60%  { transform: scale(1.12); }
  100% { transform: scale(1); opacity: 1; }
}

/* Hover preview of symbol */
.box:not([disabled]):not(.placed-O):not(.placed-X)::after {
  content: attr(data-preview);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: 900;
  opacity: 0;
  transition: opacity .18s;
  color: var(--o);
}
.box:not([disabled]):not(.placed-O):not(.placed-X):hover::after {
  opacity: 0.18;
}

/* Win highlight */
.box.win-cell {
  animation: winPulse .5s var(--ease) forwards;
  z-index: 1;
}
.box.win-cell.placed-O {
  background: var(--o);
  color: white;
  border-color: var(--o);
  box-shadow: 0 0 0 4px var(--o-glow), 0 8px 24px var(--o-glow);
}
.box.win-cell.placed-X {
  background: var(--x);
  color: white;
  border-color: var(--x);
  box-shadow: 0 0 0 4px var(--x-glow), 0 8px 24px var(--x-glow);
}
@keyframes winPulse {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.1); }
  100% { transform: scale(1.05); }
}

/* ── Result overlay ───────────────────────────────────── */
.msg-container {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(248,250,252,0.85);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-radius: var(--radius);
  z-index: 10;
  animation: overlayIn .35s var(--ease2);
}
@keyframes overlayIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.hide { display: none !important; }

.result-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem 2.5rem;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.12);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  animation: cardPop .4s var(--ease);
}
@keyframes cardPop {
  from { transform: scale(0.85); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}
.result-emoji {
  font-size: 3rem;
  line-height: 1;
  animation: emojiSpin .6s var(--ease);
}
@keyframes emojiSpin {
  from { transform: rotate(-20deg) scale(0.5); opacity: 0; }
  to   { transform: rotate(0deg) scale(1); opacity: 1; }
}
#msg {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

/* ── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: none;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform .18s var(--ease), box-shadow .18s;
  outline: none;
  font-family: inherit;
}
.btn:active { transform: scale(0.96); }

.btn-primary {
  background: linear-gradient(135deg, var(--o), #fb923c);
  color: white;
  padding: 0.75rem 2rem;
  box-shadow: 0 4px 14px var(--o-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 22px var(--o-glow); }

.btn-ghost {
  background: var(--white);
  color: var(--muted);
  border: 1.5px solid var(--border);
  padding: 0.6rem 1.25rem;
  font-size: 0.82rem;
}
.btn-ghost:hover { color: var(--text); border-color: var(--text); }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 420px) {
  .app-title { font-size: 1.35rem; }
  .result-card { padding: 1.5rem; }
}