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

body.game-body {
  font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 12% 4%, #fff3c4 0%, transparent 42%),
    radial-gradient(circle at 90% 92%, #ffe0c2 0%, transparent 42%),
    #fffdf5;
  color: #3d3300;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: #b8860b; text-decoration: none; }

/* ---------- 顶部 ---------- */
.game-head {
  background: linear-gradient(135deg, #f7d046, #e6b422 55%, #cf9a0a);
  color: #3a2a00;
  padding: 16px 0;
  box-shadow: 0 4px 18px rgba(200, 160, 20, .25);
}

.game-head .inner {
  max-width: 100%;
  margin: 0 auto;
  padding: 0 18px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.game-head h1 { font-size: 1.3rem; margin: 0; letter-spacing: 2px; }

.game-head .back {
  position: absolute;
  left: 12px;
  color: #4a3a00;
  font-size: .88rem;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.4);
}
.game-head .back:hover { background: rgba(255,255,255,.7); }

.head-spacer { display: none; }

/* ---------- 大厅 ---------- */
.hall-wrap {
  max-width: 100%;
  min-height: calc(100vh - 64px);
  margin: 0 auto;
  padding: 24px clamp(16px, 3vw, 48px) 48px;
}

.user-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: #fff;
  border: 1px solid #f0e6c8;
  border-radius: 14px;
  padding: 14px 18px;
  box-shadow: 0 6px 20px rgba(200, 170, 60, .08);
  flex-wrap: wrap;
}

.user-bar .who { font-size: .92rem; }
.user-bar .who strong { color: #b8860b; }
.user-bar .actions { display: flex; gap: 8px; }

.btn {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid #f0e6c8;
  background: #fff;
  color: #3d3300;
  font-size: .88rem;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover { border-color: #e6b422; color: #b8860b; }

.btn-gold {
  background: linear-gradient(135deg, #f7d046, #d9a50a);
  border: none;
  color: #3a2a00;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(200, 160, 20, .3);
}

.btn-gold:hover { color: #2a1e00; }

.game-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(14px, 2vw, 28px);
  margin-top: 20px;
  align-items: start;
}

@media (max-width: 800px) {
  .game-grid {
    grid-template-columns: 1fr;
  }
}

.game-card {
  background: #fff;
  border: 1px solid #f0e6c8;
  border-radius: 18px;
  padding: 28px 24px;
  text-align: center;
  box-shadow: 0 8px 24px rgba(200, 170, 60, .09);
  transition: transform .2s, box-shadow .2s, border-color .2s;
  display: flex;
  flex-direction: column;
}

.game-card:hover { transform: translateY(-5px); box-shadow: 0 16px 34px rgba(200, 150, 20, .18); border-color: #f0d066; }

.game-card .emoji { font-size: 2.8rem; }
.game-card h2 { font-size: 1.2rem; margin: 12px 0 6px; }
.game-card p { color: #9a8b5a; font-size: .88rem; margin: 0 0 18px; flex: 1; }

.score-panel {
  margin-top: 26px;
  background: #fff;
  border: 1px solid #f0e6c8;
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 6px 20px rgba(200, 170, 60, .08);
}

.score-panel h2 { font-size: 1rem; margin: 0 0 12px; }

.score-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.score-table th, .score-table td { text-align: left; padding: 9px 8px; border-bottom: 1px solid #f7efdc; }
.score-table th { color: #9a8b5a; font-weight: 600; font-size: .8rem; }
.score-table td strong { color: #d64541; }
.muted { color: #9a8b5a; font-size: .88rem; }

/* ---------- 登录 / 注册 ---------- */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-box {
  background: #fff;
  border-radius: 20px;
  padding: 36px 30px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 24px 60px rgba(140, 110, 0, .22);
  text-align: center;
}

.auth-box .logo { font-size: 2.4rem; }
.auth-box h1 { font-size: 1.2rem; margin: 10px 0 20px; }
.auth-box input {
  width: 100%;
  padding: 11px 14px;
  margin-bottom: 12px;
  border: 1px solid #f0e6c8;
  border-radius: 10px;
  font-size: .92rem;
  outline: none;
}
.auth-box input:focus { border-color: #e6b422; }
.auth-box .btn-gold { width: 100%; padding: 11px; }
.auth-box .error { color: #dc2626; font-size: .85rem; margin-bottom: 10px; }
.auth-box .switch { margin-top: 16px; font-size: .85rem; color: #9a8b5a; }

/* ---------- 游戏页 ---------- */
.play-wrap { max-width: 900px; margin: 0 auto; padding: 22px 18px 60px; }

.play-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.play-head h1 { font-size: 1.25rem; margin: 0; }
.play-head .score { font-size: .95rem; background: #fff; border: 1px solid #f0e6c8; border-radius: 999px; padding: 7px 16px; }
.play-head .score strong { color: #d64541; font-size: 1.1rem; }

.play-actions { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }

.tip { color: #9a8b5a; font-size: .85rem; margin-top: 12px; }

/* ---------- 2048 ---------- */
.board-2048 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  background: #f3e6c8;
  border-radius: 16px;
  padding: 12px;
  width: min(92vw, 62vh, 620px);
  margin: 0 auto;
}

.tile {
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(1rem, 3.2vw, 1.9rem);
  font-weight: 800;
  background: #fffdf5;
  color: #3d3300;
  transition: background .12s, color .12s;
}

.tile[data-v="2"] { background: #fff3c4; }
.tile[data-v="4"] { background: #ffe08a; }
.tile[data-v="8"] { background: #f7d046; }
.tile[data-v="16"] { background: #e6b422; }
.tile[data-v="32"] { background: #d9a50a; color: #fff; }
.tile[data-v="64"] { background: #c99a0e; color: #fff; }
.tile[data-v="128"] { background: #b8860b; color: #fff; font-size: 1.2rem; }
.tile[data-v="256"] { background: #a67c00; color: #fff; font-size: 1.2rem; }
.tile[data-v="512"] { background: #8a6d00; color: #fff; font-size: 1.1rem; }
.tile[data-v="1024"] { background: #6e5600; color: #fff; font-size: .95rem; }
.tile[data-v="2048"] { background: #4a3a00; color: #fff; font-size: .9rem; }
.tile.big { font-size: 1rem; }

/* ---------- Canvas 游戏 ---------- */
.canvas-wrap { text-align: center; }
canvas.game-canvas {
  background: #fff;
  border: 2px solid #f0e6c8;
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(200, 170, 60, .12);
  max-width: 100%;
  touch-action: none;
}