/* ============================================================
   小游戏 · 共享外壳样式（2048 / 贪吃蛇 / 扫雷 统一视觉）
   ============================================================ */
:root{
  --bg:#05060f;
  --ink:#eef2ff;
  --muted:#9aa4c7;
  --cyan:#6fe6ff;
  --violet:#b78cff;
  --pink:#ff8fd8;
  --line:rgba(255,255,255,.12);
  --glass:rgba(255,255,255,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overscroll-behavior:none}
body{
  background:radial-gradient(1200px 820px at 50% -12%,#111a33 0%,#05060f 62%) fixed,#05060f;
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei",-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
  user-select:none;-webkit-user-select:none;
  display:flex;flex-direction:column;min-height:100%;
}
a{color:inherit;text-decoration:none}

/* 顶栏 */
.topbar{position:relative;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 18px}
.back{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--muted);
  padding:8px 16px;border-radius:999px;border:1px solid rgba(255,255,255,.2);
  background:linear-gradient(180deg,rgba(255,255,255,.11),rgba(255,255,255,.04));
  backdrop-filter:blur(20px) saturate(170%);-webkit-backdrop-filter:blur(20px) saturate(170%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4);transition:.25s}
.back:hover{color:var(--ink);border-color:rgba(255,255,255,.42)}
.tleft{display:flex;align-items:center;gap:10px;min-width:0;max-width:42vw}
.roomtag{font-size:12.5px;color:var(--muted);letter-spacing:.03em;white-space:nowrap;
  font-variant-numeric:tabular-nums;overflow:hidden;text-overflow:ellipsis}
.roomtag .rc{color:var(--ink);font-weight:700}
.title{position:absolute;left:50%;transform:translateX(-50%);
  font-size:15px;font-weight:800;letter-spacing:0;opacity:.9;
  max-width:44vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topspacer{width:82px}

/* 主体 */
.wrap{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;
  padding:6px 16px 30px}

/* 状态栏 */
.hud{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.stat{display:flex;flex-direction:column;align-items:center;gap:3px;min-width:92px;
  padding:10px 16px;border-radius:14px;background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.stat .k{font-size:11px;color:var(--muted);letter-spacing:.14em}
.stat .v{font-size:20px;font-weight:800;font-variant-numeric:tabular-nums}

/* 面板 / 按钮 / 提示 */
.panel{padding:14px;border-radius:22px;
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 24px 60px -28px #000}
.row{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.btn{border:1px solid rgba(255,255,255,.2);cursor:pointer;font:inherit;font-size:14px;font-weight:700;color:var(--ink);
  padding:11px 22px;border-radius:999px;
  background:linear-gradient(180deg,rgba(255,255,255,.11),rgba(255,255,255,.04));
  backdrop-filter:blur(20px) saturate(170%);-webkit-backdrop-filter:blur(20px) saturate(170%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4);
  transition:border-color .2s,background .2s,transform .15s}
.btn:hover{border-color:rgba(255,255,255,.42);background:rgba(255,255,255,.14)}
.btn:active{transform:scale(.97)}
.btn.primary{background:linear-gradient(180deg,rgba(255,255,255,.19),rgba(255,255,255,.07));border-color:rgba(255,255,255,.32)}
.btn.on{border-color:rgba(111,230,255,.6);background:rgba(111,230,255,.14)}
.hint{color:var(--muted);font-size:12.5px;text-align:center;line-height:1.75;max-width:540px}

/* toast：灰底白字 */
.toast{position:fixed;left:50%;bottom:36px;transform:translateX(-50%);z-index:99;pointer-events:none;
  padding:12px 22px;border-radius:999px;font-size:14px;font-weight:700;color:#fff;
  background:rgba(74,78,94,.94);border:1px solid rgba(255,255,255,.16);
  backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:0 14px 40px -12px rgba(0,0,0,.7);opacity:0;transition:.3s}

/* ============================================================
   2048
   ============================================================ */
.g2048{display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(4,1fr);
  gap:11px;width:min(84vw,400px);aspect-ratio:1/1;
  background:rgba(0,0,0,.28);padding:11px;border-radius:18px;border:1px solid var(--line);
  touch-action:none}
.g2048 .cell{display:grid;place-items:center;border-radius:12px;
  background:rgba(255,255,255,.045);
  font-weight:800;font-size:clamp(17px,5.4vw,32px);font-variant-numeric:tabular-nums;
  transition:background .12s ease,color .12s ease,transform .08s ease}
.g2048 .cell.pop{transform:scale(1.06)}

/* ============================================================
   贪吃蛇
   ============================================================ */
#snakeCv{display:block;width:min(84vw,400px);height:min(84vw,400px);border-radius:16px;
  background:rgba(0,0,0,.28);border:1px solid var(--line);touch-action:none}
.dpad{display:grid;grid-template-columns:repeat(3,64px);grid-template-rows:repeat(2,64px);gap:10px;justify-content:center}
.dpad button{border:1px solid rgba(255,255,255,.2);color:var(--ink);border-radius:16px;
  font-size:20px;cursor:pointer;
  background:linear-gradient(180deg,rgba(255,255,255,.11),rgba(255,255,255,.04));
  backdrop-filter:blur(20px) saturate(170%);-webkit-backdrop-filter:blur(20px) saturate(170%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4);
  transition:border-color .15s,background .15s}
.dpad button:hover{border-color:rgba(255,255,255,.42);background:rgba(255,255,255,.14)}
.dpad .sp{visibility:hidden}
@media (hover:hover) and (pointer:fine){.dpad{display:none}}   /* 桌面用键盘，不显示方向键 */

/* ============================================================
   扫雷
   ============================================================ */
.ms-grid{display:grid;gap:6px;justify-content:center}
.ms-cell{width:var(--cs,34px);height:var(--cs,34px);border-radius:8px;cursor:pointer;
  display:grid;place-items:center;font-weight:800;font-size:calc(var(--cs,34px) * .46);
  background:linear-gradient(180deg,rgba(255,255,255,.12),rgba(255,255,255,.05));
  border:1px solid var(--line);color:var(--ink);font-variant-numeric:tabular-nums;
  transition:background .12s,transform .06s}
.ms-cell:hover{background:rgba(255,255,255,.16)}
.ms-cell:active{transform:scale(.95)}
.ms-cell.open{background:rgba(0,0,0,.3);cursor:default;border-color:rgba(255,255,255,.06)}
.ms-cell.open:hover{background:rgba(0,0,0,.3)}
.ms-panel{max-width:min(96vw,980px);overflow:auto}
.ms-cell.flag{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ff8fd8' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 22V3'/%3E%3Cpath d='M6 4h12l-2.5 4.5L18 13H6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:center;background-size:60%;
  background-color:rgba(255,143,216,.12)}
.ms-cell.mine{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ff8fd8' stroke-width='2.2' stroke-linecap='round'%3E%3Ccircle cx='12' cy='12' r='5.5'/%3E%3Cpath d='M12 2v3M12 19v3M2 12h3M19 12h3M5.6 5.6l2.1 2.1M16.3 16.3l2.1 2.1M18.4 5.6l-2.1 2.1M7.7 16.3l-2.1 2.1'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:center;background-size:64%;
  background-color:rgba(255,143,216,.20)}
.ms-cell.boom{background-color:rgba(255,90,90,.5)}
.ms-cell.n1{color:#6fe6ff}.ms-cell.n2{color:#7df0b0}.ms-cell.n3{color:#ffd479}
.ms-cell.n4{color:#b78cff}.ms-cell.n5{color:#ff9d6b}.ms-cell.n6{color:#6bffd6}
.ms-cell.n7{color:#e6e6ff}.ms-cell.n8{color:#9aa4c7}

/* ============================================================
   国际象棋
   ============================================================ */
.cboard{--bw:min(92vw,460px);width:var(--bw);height:var(--bw);
  display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);
  border-radius:14px;overflow:hidden;border:1px solid var(--line);touch-action:none}
.csq{position:relative;display:grid;place-items:center;cursor:pointer;-webkit-tap-highlight-color:transparent}
.csq.l{background:#a9b3c9}
.csq.d{background:#4a5266}
.csq .pc{position:relative;z-index:2;line-height:1;font-size:calc(var(--bw)/8 * .84);pointer-events:none}
.csq .pc.w{color:#fff;text-shadow:0 0 2px #111,0 1px 2px rgba(0,0,0,.65),0 -1px 2px rgba(0,0,0,.4),1px 0 2px rgba(0,0,0,.4),-1px 0 2px rgba(0,0,0,.4)}
.csq .pc.b{color:#1b1e28;text-shadow:0 0 2px rgba(255,255,255,.55),0 1px 2px rgba(255,255,255,.3),0 -1px 2px rgba(255,255,255,.3),1px 0 2px rgba(255,255,255,.3),-1px 0 2px rgba(255,255,255,.3)}
.csq.sel::after{content:"";position:absolute;inset:0;background:rgba(111,230,255,.4);z-index:1}
.csq.last::after{content:"";position:absolute;inset:0;background:rgba(255,214,120,.3);z-index:1}
.csq.chk::after{content:"";position:absolute;inset:0;z-index:1;
  background:radial-gradient(circle,rgba(255,72,72,.9),rgba(255,72,72,0) 72%)}
.csq.mv::before{content:"";position:absolute;width:30%;height:30%;border-radius:50%;
  background:rgba(16,26,40,.45);z-index:3;pointer-events:none}
.csq.cap::before{content:"";position:absolute;inset:7%;border-radius:50%;
  border:3px solid rgba(255,143,216,.85);z-index:3;pointer-events:none}
.rin{width:106px;text-align:center;font:inherit;font-size:15px;font-weight:700;letter-spacing:.2em;
  color:var(--ink);text-transform:uppercase;
  background:linear-gradient(180deg,rgba(255,255,255,.11),rgba(255,255,255,.04));
  border:1px solid rgba(255,255,255,.2);border-radius:999px;padding:11px 12px;outline:none}
.rin:focus{border-color:rgba(111,230,255,.6)}
.rin::placeholder{color:var(--muted);letter-spacing:.04em;font-weight:400;font-size:12.5px}
.stat.wide{min-width:160px;max-width:62vw}
.stat.wide .v{font-size:13.5px;font-weight:600;line-height:1.45}
.promo{position:fixed;inset:0;z-index:120;display:grid;place-items:center;
  background:rgba(5,6,15,.62);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}
.promo.hidden{display:none}
.promo-box{padding:18px 20px;border-radius:20px;text-align:center;
  background:linear-gradient(180deg,rgba(255,255,255,.12),rgba(255,255,255,.05));
  border:1px solid rgba(255,255,255,.22);backdrop-filter:blur(16px)}
.promo-title{font-size:13px;color:var(--muted);margin-bottom:12px}
.promo-row{display:flex;gap:10px}
.promo-row button{width:54px;height:54px;font-size:34px;line-height:1;cursor:pointer;color:#fff;
  border-radius:14px;border:1px solid rgba(255,255,255,.2);
  background:linear-gradient(180deg,rgba(255,255,255,.11),rgba(255,255,255,.04));transition:.15s}
.promo-row button:hover{background:rgba(255,255,255,.16);border-color:rgba(111,230,255,.5)}

/* 模式选择屏 */
#gameScreen{display:flex;flex-direction:column;align-items:center;gap:18px;width:100%}
.pick{display:flex;flex-direction:column;align-items:center;gap:22px;padding:14px 0}
.pick-title{font-size:14px;font-weight:700;letter-spacing:.16em;color:var(--muted)}
.pick-row{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}
.pick-btn{width:min(78vw,224px);padding:26px 18px;border-radius:22px;cursor:pointer;font:inherit;color:var(--ink);
  display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center;
  background:linear-gradient(180deg,rgba(255,255,255,.11),rgba(255,255,255,.04));
  border:1px solid rgba(255,255,255,.2);
  backdrop-filter:blur(20px) saturate(170%);-webkit-backdrop-filter:blur(20px) saturate(170%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4);
  transition:transform .25s,border-color .25s,background .25s}
.pick-btn:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.44);background:rgba(255,255,255,.13)}
.pick-btn:active{transform:translateY(-1px) scale(.99)}
.pick-btn .pi{display:grid;place-items:center;color:#fff}
.pick-btn .pt{font-size:17px;font-weight:800}
.pick-btn .pd{font-size:12.5px;color:var(--muted);line-height:1.55}
.modebar{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap}
.modelabel{font-size:13.5px;font-weight:700;color:var(--muted);letter-spacing:.08em}
/* 联机准备屏 */
.pick-inner{display:flex;flex-direction:column;align-items:center;gap:16px;width:100%}
.roomcode{font-size:clamp(34px,11vw,48px);font-weight:800;letter-spacing:.3em;padding-left:.3em;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(100deg,var(--cyan),var(--violet));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.pick-sub{font-size:12.5px;color:var(--muted);text-align:center;line-height:1.6;max-width:320px}
.rin-big{width:162px;font-size:22px;letter-spacing:.3em;padding:14px 10px;text-align:center}
.rin-big::placeholder{letter-spacing:.06em;font-size:13px}

@media (max-width:640px){
  .stat{min-width:76px;padding:8px 12px}
  .stat .v{font-size:17px}
  .hint{font-size:12px}
  /* 手机分辨率：扫雷只保留初级，隐藏中级/高级 */
  [data-level="mid"],[data-level="hard"]{display:none}
  /* 窄屏：标题缩小，房间号只留号码本身，避免相互挤压 */
  .title{font-size:13px;max-width:38vw}
  .roomtag .rl{display:none}
}