/* ============ AI GYM · 体感俄罗斯方块 ============ */
:root{
  --bg:#04070f;
  --accent:#00ffd1;
  --accent2:#2ee6a8;
  --amber:#ffd54a;
  --panel:rgba(6,14,26,.72);
  --line:rgba(0,255,209,.32);
  --text:#d7fff4;
  --dim:#8fb2b8;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Roboto Mono",monospace;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%;overscroll-behavior:none}
body{
  background:var(--bg);color:var(--text);font-family:var(--mono);
  display:flex;flex-direction:column;overflow:hidden;user-select:none;-webkit-user-select:none;
  padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

/* ---- 摄像头底层 ---- */
#cam{position:fixed;inset:0;width:100%;height:100%;z-index:0;background:#04070f}
#video{position:fixed;width:1px;height:1px;opacity:0;pointer-events:none}

/* ---- 顶部 HUD ---- */
#hud{
  position:relative;z-index:2;display:flex;gap:8px;align-items:stretch;
  padding:8px 10px 6px;
}
#hud .stat{
  flex:1;background:var(--panel);border:1px solid var(--line);border-radius:8px;
  padding:5px 8px 6px;text-align:center;min-width:0;
}
#hud label{display:block;font-size:9px;letter-spacing:2px;color:var(--dim)}
#hud b{display:block;font-size:clamp(15px,4.2vw,22px);font-weight:700;color:#fff;
  text-shadow:0 0 8px rgba(0,255,209,.45);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#hud .next{flex:0 0 auto;display:flex;flex-direction:column;align-items:center;justify-content:center}
#next{width:34px;height:34px;image-rendering:pixelated}

/* ---- 健身面板 ---- */
#fitPanel{
  position:absolute;top:64px;left:10px;z-index:3;
  background:var(--panel);border:1px solid var(--line);border-radius:8px;
  padding:6px 10px;font-size:11px;line-height:1.7;min-width:132px;
}
#fitPanel .row{display:flex;justify-content:space-between;gap:10px;color:var(--dim)}
#fitPanel .row.big{color:var(--text);font-size:12px;font-weight:700}
#fitPanel b{color:var(--amber)}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#556;margin-right:4px;vertical-align:1px}
.dot.on{background:#2ee6a8;box-shadow:0 0 8px #2ee6a8}
.dot.off{background:#e05555}

/* ---- 顶部按钮 ---- */
#topBtns{position:absolute;top:64px;right:10px;z-index:3;display:flex;gap:6px}
#topBtns button{
  width:36px;height:36px;border-radius:8px;border:1px solid var(--line);
  background:var(--panel);color:var(--text);font-size:15px;
}

/* ---- 游戏区 ---- */
#stage{position:relative;z-index:2;flex:1;min-height:0;display:flex;align-items:center;justify-content:center;gap:8px}
#boardWrap{height:100%;max-height:min(72vh,148vw);display:flex}
#board{
  height:100%;aspect-ratio:1/2;
  background:rgba(4,10,22,.62);
  border:1px solid var(--line);border-radius:8px;
  box-shadow:0 0 22px rgba(0,255,209,.16),inset 0 0 34px rgba(0,0,0,.55);
}
.sideArrows{
  writing-mode:vertical-rl;text-orientation:upright;
  color:var(--amber);opacity:.5;font-size:13px;line-height:1.15;letter-spacing:2px;
  text-shadow:0 0 8px rgba(255,213,74,.8);white-space:pre;user-select:none;
  align-self:stretch;display:flex;align-items:center;max-height:min(72vh,148vw);
}

/* ---- 底部动作条 ---- */
#actionBar{
  position:relative;z-index:2;display:flex;gap:6px;justify-content:center;
  padding:8px 10px 10px;
}
.chip{
  flex:1;max-width:96px;background:var(--panel);border:1px solid rgba(143,178,184,.25);
  border-radius:8px;padding:6px 2px 7px;text-align:center;transition:all .12s;
}
.chip i{display:block;font-style:normal;font-size:17px;line-height:1.1;color:var(--dim)}
.chip span{font-size:10px;color:var(--dim);letter-spacing:1px}
.chip.on{border-color:var(--accent);box-shadow:0 0 12px rgba(0,255,209,.35)}
.chip.on i,.chip.on span{color:var(--accent)}
.chip.fire{background:rgba(0,255,209,.28);border-color:var(--accent);transform:scale(1.07)}
.chip.drop.fire{background:rgba(255,213,74,.30);border-color:var(--amber)}
.chip.drop.fire i,.chip.drop.fire span{color:var(--amber)}

/* ---- 覆盖层 ---- */
#overlay{
  position:fixed;inset:0;z-index:10;display:flex;align-items:center;justify-content:center;
  background:rgba(3,6,14,.82);backdrop-filter:blur(3px);
  padding:env(safe-area-inset-top) 16px env(safe-area-inset-bottom);
}
#overlay.hidden{display:none}
.screen{width:min(420px,94vw);text-align:center;animation:fadein .25s}
.screen.hidden{display:none}
@keyframes fadein{from{opacity:0;transform:translateY(8px)}to{opacity:1}}

h1{font-size:30px;letter-spacing:6px;color:#fff;text-shadow:0 0 18px rgba(0,255,209,.8)}
h1 span{display:block;font-size:15px;letter-spacing:10px;color:var(--accent);margin-top:6px;text-indent:10px}
h2{font-size:22px;letter-spacing:4px;color:#fff}
.sub{margin:12px 0 4px;font-size:12px;line-height:1.8;color:var(--dim)}
.foot{margin-top:14px;font-size:10px;color:#5c7a80;line-height:1.7}

.guide{list-style:none;text-align:left;margin:18px auto;max-width:330px}
.guide li{
  display:flex;align-items:center;gap:10px;padding:9px 12px;margin-bottom:8px;
  background:var(--panel);border:1px solid rgba(0,255,209,.18);border-radius:8px;
}
.guide i{
  font-style:normal;width:36px;height:36px;flex:0 0 36px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;font-size:19px;
  background:rgba(0,255,209,.12);color:var(--accent);
  box-shadow:inset 0 0 10px rgba(0,255,209,.15);
}
.guide b{font-size:13px;color:#fff;display:block}
.guide span{font-size:11px;color:var(--dim);display:block;margin-top:2px}

.btn{
  display:block;width:100%;margin-top:12px;padding:13px;border-radius:10px;
  border:1px solid var(--line);background:var(--panel);color:var(--text);
  font-family:var(--mono);font-size:15px;letter-spacing:2px;cursor:pointer;
}
.btn.primary{
  background:linear-gradient(135deg,rgba(0,255,209,.25),rgba(46,230,168,.12));
  border-color:var(--accent);color:#fff;font-weight:700;
  box-shadow:0 0 18px rgba(0,255,209,.25);
}
.btn.ghost{border-color:rgba(143,178,184,.25);color:var(--dim)}
.btn:active{transform:scale(.97)}

/* 加载 */
.bar{height:8px;border-radius:4px;background:rgba(143,178,184,.15);overflow:hidden;margin:16px auto 0;max-width:300px}
#loadBar{height:100%;width:0%;background:linear-gradient(90deg,var(--accent2),var(--accent));transition:width .3s}

/* 倒计时 */
#scrCount{background:transparent}
#scrCount.trans{background:rgba(3,6,14,.35)}
#countNum{
  font-size:110px;font-weight:800;color:#fff;line-height:1.1;
  text-shadow:0 0 40px rgba(0,255,209,.9);animation:pop .9s infinite;
}
#scrCount .hint{font-size:14px;color:var(--amber);text-shadow:0 0 10px rgba(0,0,0,.8)}
@keyframes pop{0%{transform:scale(1)}50%{transform:scale(1.12)}100%{transform:scale(1)}}

/* 结束 */
.finalScore{font-size:44px;font-weight:800;color:var(--amber);margin:10px 0;text-shadow:0 0 22px rgba(255,213,74,.5)}
table.stats{width:100%;border-collapse:collapse;margin:6px 0 8px}
table.stats td{padding:7px 4px;font-size:13px;border-bottom:1px dashed rgba(143,178,184,.2)}
table.stats td:first-child{color:var(--dim);text-align:left}
table.stats td:last-child{color:#fff;text-align:right;font-weight:700}