/* 550v 贪吃蛇 —— 页面特有样式（单元样式仍来自 web-style 的 tokens.css / components.css） */

.sn-wrap{
  max-width: 1080px;
  margin: 0 auto;
  padding: clamp(14px, 2.4vw, 32px);
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.4vw, 18px);
  min-height: 100vh;
  box-sizing: border-box;
}

/* 头部：标题 + 右侧控制 */
.sn-wrap > header{
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.sn-title .title{ font-size: clamp(18px, 1.9vw, 24px); font-weight: 600; letter-spacing: .01em; }
.sn-title .title b{ font-weight: 600; color: var(--lime); }
.sn-title .sub{ margin-top: 4px; font-size: 13px; color: var(--dim2); }

.hdr-right{ display: flex; align-items: center; gap: 10px; }

.sn-speed{ display: flex; gap: 2px; border: 1px solid var(--rule); border-radius: 999px; padding: 2px; }
.sn-speed button{
  appearance: none; border: 0; background: transparent; color: var(--dim2);
  font: 500 12px/1 var(--mono); padding: 6px 10px; border-radius: 999px; cursor: pointer;
}
.sn-speed button.on{ background: var(--rule2); color: var(--text); }

/* 舞台 */
.sn-stage{
  position: relative;
  padding: 0;
  overflow: hidden;
  aspect-ratio: 3 / 2;
  max-height: calc(100vh - 230px);
  margin: 0 auto;
  width: 100%;
  background: var(--card2);
  border-radius: 14px;
}
.sn-stage canvas{ display: block; width: 100%; height: 100%; }

.sn-badge{
  position: absolute; top: 10px; left: 12px;
  font: 500 11px/1.4 var(--mono); color: var(--dim2);
  background: color-mix(in srgb, var(--card) 70%, transparent);
  border: 1px solid var(--rule); border-radius: 999px;
  padding: 5px 10px; pointer-events: none;
  backdrop-filter: blur(4px);
}
.sn-badge b{ color: var(--text); }

.sn-flash{
  position: absolute; inset: 0; pointer-events: none;
  background: var(--fire); opacity: 0;
  transition: opacity .18s ease-out;
}
.sn-flash.show{ opacity: .16; transition: none; }

/* HUD */
.sn-hud{
  display: flex; align-items: center; gap: clamp(14px, 2.4vw, 34px);
  flex-wrap: wrap;
  padding: 2px 4px;
}
.sn-hud .kv{ display: flex; flex-direction: column; gap: 3px; }
.sn-hud .kv span{ font-size: 11px; color: var(--dim2); letter-spacing: .02em; }
.sn-hud .kv b{ font: 600 20px/1 var(--mono); color: var(--text); font-variant-numeric: tabular-nums; }
.sn-hud .kv b.hot{ color: var(--lime); }

.sn-pause{
  margin-left: auto;
  appearance: none; cursor: pointer;
  background: transparent; color: var(--dim);
  border: 1px solid var(--rule); border-radius: 999px;
  font: 500 12px/1 var(--mono); padding: 8px 14px;
}
.sn-pause:hover{ color: var(--text); border-color: var(--dim2); }

.sn-foot{
  margin-top: auto;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 11px; color: var(--dim2);
  border-top: 1px solid var(--rule2); padding-top: 10px;
}
.sn-foot a{ color: var(--dim); text-decoration: none; border-bottom: 1px solid var(--rule); }
.sn-foot a:hover{ color: var(--text); }

@media (max-width: 640px){
  .sn-stage{ aspect-ratio: 1 / 1; max-height: none; }
  .sn-hud{ gap: 18px; }
  .sn-hud .kv b{ font-size: 17px; }
  .sn-pause{ margin-left: 0; }
}

/* 主题按钮（抄自 550v-portal/portal.css，同一套单元） */
.theme{flex:none;width:32px;height:32px;border-radius:999px;cursor:pointer;
  border:1px solid var(--rule);background:var(--card);color:var(--dim);
  font:14px/1 var(--mono);display:inline-flex;align-items:center;justify-content:center;
  transition:color .12s,border-color .12s,background .12s}
.theme:hover{color:var(--text);border-color:var(--dim2)}
.theme:focus-visible{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(87,169,230,.18)}
:root[data-theme="light"] .theme{box-shadow:inset 0 1px 0 rgba(255,255,255,1),0 1px 2px rgba(28,36,49,.08)}
@media (max-width:679px){ .hdr-right{gap:8px} .theme{width:30px;height:30px} }

/* canvas 不可用时的兜底提示（main.js 里插进来） */
.sn-fail{
  margin: 0 auto; padding: 14px 18px;
  border: 1px solid var(--rule); border-radius: 10px;
  background: var(--card); color: var(--dim);
  font: 13px/1.6 var(--mono);
}

/* 浅色主题：卡片与页面底色很接近，加一层内描边把棋盘与背景分开 */
:root[data-theme="light"] .sn-stage{box-shadow:inset 0 0 0 1px var(--rule)}