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

:root {
  --bg: #0d0d14;
  --surface: #16161f;
  --surface-2: #1e1e2a;
  --border: rgba(255,255,255,0.07);
  --border-hover: rgba(255,255,255,0.15);
  --o-color: #fb923c;
  --o-bg: rgba(251,146,60,0.12);
  --o-border: rgba(251,146,60,0.3);
  --x-color: #a78bfa;
  --x-bg: rgba(167,139,250,0.12);
  --x-border: rgba(167,139,250,0.3);
  --text: #f1f0f7;
  --muted: rgba(241,240,247,0.4);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bg-shapes {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.15;
}
.shape-1 {
  width: 450px; height: 450px;
  background: var(--o-color);
  top: -120px; left: -120px;
}
.shape-2 {
  width: 400px; height: 400px;
  background: var(--x-color);
  bottom: -100px; right: -100px;
}

/* Winner/Draw overlay — uses your exact .msg-container and .hide */
.msg-container {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(13, 13, 20, 0.82);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  animation: fadeIn 0.25s ease;
}

.msg-container.hide {
  display: none;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

#message {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.02em;
  animation: popIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes popIn {
  from { transform: scale(0.6); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

#new-game {
  background: var(--x-color);
  color: #fff;
  border: none;
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  font-weight: 500;
  padding: 0.75rem 2.2rem;
  border-radius: 999px;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
  letter-spacing: 0.03em;
}
#new-game:hover  { opacity: 0.85; }
#new-game:active { transform: scale(0.96); }

main {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  padding: 2rem 1rem;
}

.header { text-align: center; }

h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.2rem, 7vw, 3.2rem);
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--text);
}
h1 span { color: var(--x-color); }

.subtitle {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: 0.3rem;
}

.board-wrapper {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1.25rem;
}

.game {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.box {
  width: clamp(90px, 19vmin, 115px);
  height: clamp(90px, 19vmin, 115px);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.2rem, 7vmin, 3rem);
  font-weight: 800;
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.1s;
}

.box:hover:not(:disabled) {
  background: rgba(255,255,255,0.05);
  border-color: var(--border-hover);
}
.box:active:not(:disabled) { transform: scale(0.93); }
.box:disabled { cursor: default; }

.box.zero {
  color: var(--o-color);
  background: var(--o-bg);
  border-color: var(--o-border);
  animation: stampIn 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-shadow: 0 0 20px rgba(251,146,60,0.5);
}

.box.cross {
  color: var(--x-color);
  background: var(--x-bg);
  border-color: var(--x-border);
  animation: stampIn 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-shadow: 0 0 20px rgba(167,139,250,0.5);
}

@keyframes stampIn {
  from { transform: scale(0.5) rotate(-8deg); opacity: 0; }
  to   { transform: scale(1)   rotate(0deg);  opacity: 1; }
}

#resetBtn {
  background: transparent;
  border: 1px solid var(--border-hover);
  color: var(--muted);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  padding: 0.55rem 1.6rem;
  border-radius: 999px;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
#resetBtn:hover {
  color: var(--text);
  border-color: rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.05);
}