/* Colours, font and shapes come from client/theme.ts (custom properties). */
:root {
  font-family: var(--font, system-ui, sans-serif);
  color: var(--text, #2b2a28);
  background: var(--sky-bottom, #efe3c8);
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  min-height: 100svh;
  background: linear-gradient(var(--sky-top), var(--sky-bottom));
}
.fx {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
}
main {
  max-width: 720px;
  padding: 72px 24px 36px;
  margin: auto;
  text-align: center;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 700;
  font-size: 11px;
  color: var(--ground);
  margin: 0 0 14px;
}
h1 {
  font-size: clamp(32px, 6vw, 48px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 14px;
}
.intro {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
  margin: 0 auto 28px;
  max-width: 410px;
}
.game {
  max-width: 344px;
  margin: auto;
  padding: 18px;
  background: var(--surface);
  border: max(1px, var(--outline)) solid var(--ink);
  border-radius: calc(var(--radius) * 2.4);
  box-shadow:
    0 0 var(--glow) var(--ground),
    0 24px 60px #0002;
}
.players {
  display: flex;
  gap: 12px;
}
.player {
  flex: 1;
  min-width: 0;
  border: 2px solid transparent;
  border-radius: calc(var(--radius) * 1.2);
  padding: 8px;
  background: color-mix(in srgb, var(--muted) 10%, var(--surface));
  display: grid;
  grid-template-columns: 28px 1fr;
  text-align: left;
  align-items: center;
  transition: border-color 0.2s;
}
.player[data-active='true'] {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 16%, var(--surface));
}
.player strong {
  grid-row: span 2;
  font-size: 29px;
}
.player span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 600;
  font-size: 13px;
}
.player small {
  font-size: 10px;
  color: var(--muted);
  margin-top: 2px;
}
.status {
  font-size: 16px;
  font-weight: 700;
  min-height: 24px;
  margin: 24px 0 18px;
}
.status[data-state='win'] {
  color: var(--accent);
  text-shadow: 0 0 var(--glow) var(--accent);
}
.status[data-state='loss'] {
  color: var(--danger);
}
.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 9px;
}
.board button {
  aspect-ratio: 1;
  border: max(1px, var(--outline)) solid var(--ink);
  border-radius: calc(var(--radius) * 1.4);
  background: color-mix(in srgb, var(--ground) 14%, var(--surface));
  color: var(--text);
  font: 700 clamp(48px, 14vw, 70px) / 1 var(--font);
  cursor: pointer;
  touch-action: manipulation;
  transition:
    background 0.12s,
    transform 0.12s;
}
.board button:enabled:hover {
  background: color-mix(in srgb, var(--accent) 22%, var(--surface));
  transform: translateY(-2px);
}
.board button:focus-visible,
.back:focus-visible {
  outline: 3px solid var(--text);
  outline-offset: 3px;
}
.board button:disabled {
  cursor: default;
  opacity: 1;
}
.board button[data-mark='0']:disabled {
  background: color-mix(in srgb, var(--muted) 8%, var(--surface));
}
.board button.placed {
  animation: pop 0.28s cubic-bezier(0.3, 1.6, 0.6, 1);
}
.board button[data-win='true'] {
  background: color-mix(in srgb, var(--accent) 45%, var(--surface));
  animation: glow 1s ease-in-out infinite alternate;
}
@keyframes pop {
  from {
    transform: scale(0.6);
  }
}
@keyframes glow {
  to {
    box-shadow: 0 0 calc(var(--glow) + 16px) var(--accent);
  }
}
[data-mark='1'],
.board button[data-mark='1'] {
  color: var(--player-1);
}
[data-mark='2'],
.board button[data-mark='2'] {
  color: var(--player-2);
}
.hint {
  font-size: 11px;
  color: var(--muted);
  margin: 19px 0 0;
}
.rules {
  color: var(--muted);
  max-width: 390px;
  font-size: 12px;
  line-height: 1.7;
  margin: 24px auto 0;
}
.back {
  font: 700 14px var(--font);
  background: var(--ground);
  color: #fff;
  border: var(--outline) solid var(--ink);
  border-radius: calc(var(--radius) * 1.2);
  padding: 13px 24px;
  margin-top: 20px;
  min-height: 44px;
  cursor: pointer;
}
.back[hidden] {
  display: none;
}
@media (max-width: 480px) {
  main {
    padding: 70px 18px 26px;
  }
  .intro {
    margin-bottom: 20px;
  }
  .game {
    padding: 16px;
  }
  .status {
    margin: 18px 0 15px;
  }
  .board {
    gap: 8px;
  }
  .rules {
    margin-top: 20px;
  }
}
@media (max-height: 700px) and (min-width: 600px) {
  main {
    padding-top: 24px;
  }
  .intro {
    margin-bottom: 16px;
  }
  .game {
    max-width: 330px;
    padding: 16px;
  }
  .board button {
    font-size: 52px;
  }
  .status {
    margin: 12px 0;
  }
  .rules {
    margin-top: 12px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .board button.placed,
  .board button[data-win='true'] {
    animation: none;
  }
}