/* ============================================================
   时间悖论 · 失控实验室  —  style
   ============================================================ */
:root{
  --cyan:#54e9ff;
  --cyan-dim:rgba(84,233,255,.32);
  --mag:#ff58ad;
  --mag-dim:rgba(255,88,173,.3);
  --green:#5cf2b4;
  --amber:#ffc857;
  --red:#ff4d5e;
  --bg:#04060c;
  --panel:rgba(8,13,23,.86);
  --line:rgba(84,233,255,.16);
  --txt:#d3e8f8;
  --dim:#6c8aa8;
  --mono:ui-monospace,"SFMono-Regular","Cascadia Mono",Consolas,"Liberation Mono",monospace;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--txt);
  font-family:var(--sans);
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
  letter-spacing:.02em;
}

/* ---------- background ---------- */
.bg-base{position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(900px 520px at 50% 8%, rgba(38,120,190,.13), transparent 68%),
    radial-gradient(700px 500px at 12% 96%, rgba(150,40,140,.09), transparent 70%),
    radial-gradient(620px 460px at 92% 82%, rgba(30,170,160,.07), transparent 72%),
    linear-gradient(180deg,#04060c,#03050a 60%,#050810);
}
.bg-grid{position:fixed;inset:-10%;z-index:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(84,233,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(84,233,255,.055) 1px, transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(circle at 50% 45%, #000 0%, transparent 72%);
  mask-image:radial-gradient(circle at 50% 45%, #000 0%, transparent 72%);
  animation:gridDrift 26s linear infinite;
}
@keyframes gridDrift{from{background-position:0 0,0 0}to{background-position:56px 56px,56px 56px}}
.bg-scan{position:fixed;inset:0;z-index:1;pointer-events:none;
  background:repeating-linear-gradient(0deg, rgba(0,0,0,.22) 0 1px, transparent 1px 3px);
  opacity:.5;mix-blend-mode:multiply}
.bg-scan::after{content:"";position:absolute;left:0;right:0;height:180px;
  background:linear-gradient(180deg,transparent,rgba(84,233,255,.045),transparent);
  animation:sweep 9s linear infinite}
@keyframes sweep{0%{top:-200px}100%{top:110%}}

/* ---------- frame ---------- */
#app{position:relative;z-index:2;width:100%;display:flex;justify-content:center;padding:18px}
.frame{
  position:relative;width:min(788px,96vw);min-width:0;
  background:linear-gradient(180deg, rgba(11,18,31,.985), rgba(5,9,16,.995));
  border:1px solid rgba(84,233,255,.14);
  box-shadow:
    0 0 0 1px rgba(0,0,0,.6),
    0 30px 90px -20px rgba(0,0,0,.9),
    0 0 70px -30px rgba(84,233,255,.35),
    inset 0 1px 0 rgba(255,255,255,.04);
  padding:14px 14px 10px;
  clip-path:polygon(18px 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%,0 18px);
}
.corner{position:absolute;width:14px;height:14px;pointer-events:none;opacity:.75}
.corner.tl{top:0;left:0;border-top:1px solid var(--cyan);border-left:1px solid var(--cyan)}
.corner.tr{top:0;right:0;border-top:1px solid var(--cyan);border-right:1px solid var(--cyan)}
.corner.bl{bottom:0;left:0;border-bottom:1px solid var(--cyan);border-left:1px solid var(--cyan)}
.corner.br{bottom:0;right:0;border-bottom:1px solid var(--cyan);border-right:1px solid var(--cyan)}

/* ---------- hud ---------- */
.hud{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1.5fr) auto;gap:14px;
  align-items:center;padding:2px 4px 12px;border-bottom:1px solid rgba(84,233,255,.1);margin-bottom:10px}
.hud-cell{min-width:0}
.brand-cell{display:flex;align-items:center;gap:11px}
.lvl-tag{font-family:var(--mono);font-size:26px;font-weight:600;color:var(--cyan);
  line-height:1;text-shadow:0 0 18px rgba(84,233,255,.55);letter-spacing:-.02em}
.lvl-tag i{font-style:normal;font-size:11px;color:var(--dim);letter-spacing:0;margin-left:1px}
.lvl-name{font-size:14px;font-weight:600;letter-spacing:.14em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lvl-sub{font-family:var(--mono);font-size:9px;color:var(--dim);letter-spacing:.12em;margin-top:3px}
.mid-cell{display:flex;flex-direction:column;gap:6px}
.cycle-row,.tick-row{display:flex;align-items:center;gap:8px}
.hud-label{font-family:var(--mono);font-size:9px;color:var(--dim);letter-spacing:.16em;flex:0 0 auto}
.pips{display:flex;gap:5px}
.pip{width:16px;height:5px;border-radius:1px;background:rgba(110,150,185,.18);
  border:1px solid rgba(110,150,185,.22);transition:all .3s}
.pip.used{background:rgba(255,88,173,.75);border-color:var(--mag);box-shadow:0 0 8px rgba(255,88,173,.55)}
.pip.now{background:rgba(84,233,255,.85);border-color:var(--cyan);box-shadow:0 0 10px rgba(84,233,255,.7);
  animation:pipPulse 1.4s ease-in-out infinite}
@keyframes pipPulse{0%,100%{opacity:1}50%{opacity:.45}}
.swap-count{display:none;font-family:var(--mono);font-size:9px;color:var(--cyan);letter-spacing:.06em;
  border:1px solid rgba(84,233,255,.32);padding:0 4px;line-height:13px;border-radius:2px;background:rgba(84,233,255,.08)}
.swap-count.spent{color:#5a7288;border-color:rgba(120,150,180,.2);background:transparent}
.echo-count{font-family:var(--mono);font-size:9px;color:rgba(255,88,173,.75);letter-spacing:.08em;
  margin-left:2px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.tickbar{display:flex;gap:2px;flex:1;min-width:0}
.seg{height:9px;flex:1;background:rgba(84,233,255,.13);border-top:1px solid rgba(84,233,255,.22);
  transition:background .12s, box-shadow .12s;border-radius:1px}
.seg.spent{background:rgba(84,233,255,.62);box-shadow:0 0 7px rgba(84,233,255,.5)}
.seg.warn{background:rgba(255,200,87,.35);border-top-color:rgba(255,200,87,.5)}
.seg.warn.spent{background:rgba(255,200,87,.85);box-shadow:0 0 8px rgba(255,200,87,.6)}
.tick-num{font-family:var(--mono);font-size:10px;color:var(--dim);flex:0 0 auto;min-width:44px;text-align:right}
.ctrl-cell{display:flex;align-items:center;gap:7px}
.btn-stack{display:flex;gap:5px}

/* ---------- buttons ---------- */
.btn{
  font-family:var(--sans);font-size:11px;letter-spacing:.1em;color:var(--txt);
  background:rgba(84,233,255,.06);border:1px solid rgba(84,233,255,.28);
  padding:7px 11px;cursor:pointer;position:relative;
  clip-path:polygon(6px 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%,0 6px);
  transition:background .18s,border-color .18s,color .18s,transform .1s;
  white-space:nowrap;display:inline-flex;align-items:center;gap:7px;
}
.btn:hover{background:rgba(84,233,255,.15);border-color:rgba(84,233,255,.6);color:#fff}
.btn:active{transform:translateY(1px)}
.btn.primary{background:rgba(84,233,255,.14);border-color:rgba(84,233,255,.5);
  box-shadow:0 0 22px -8px rgba(84,233,255,.7), inset 0 0 18px -10px rgba(84,233,255,.9)}
.btn.icon{padding:7px 9px;font-size:12px;min-width:30px;justify-content:center}
.btn kbd{font-family:var(--mono);font-size:9px;opacity:.55;border:1px solid rgba(255,255,255,.18);
  padding:0 3px;border-radius:2px;line-height:13px}
.btn[disabled]{opacity:.32;pointer-events:none}
.btn.muted{color:var(--dim)}

/* ---------- stage ---------- */
.stage{position:relative;width:100%;background:#05080f;
  border:1px solid rgba(84,233,255,.1);overflow:hidden;
  box-shadow:inset 0 0 60px rgba(0,0,0,.9)}
canvas{display:block;width:100%;height:auto;image-rendering:auto}
.stage-vig{position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 100% at 50% 45%, transparent 45%, rgba(0,0,0,.55) 100%);
  mix-blend-mode:multiply}
.stage-scan{position:absolute;inset:0;pointer-events:none;opacity:.35;
  background:repeating-linear-gradient(0deg, rgba(0,0,0,.25) 0 1px, transparent 1px 3px)}
.stage-glitch{position:absolute;inset:0;pointer-events:none;opacity:0;
  background:linear-gradient(90deg, rgba(255,0,90,.35), transparent 30%, transparent 70%, rgba(0,220,255,.35));
  mix-blend-mode:screen;transition:opacity .12s}
.stage-glitch.on{opacity:.85;animation:glitchShift .18s steps(2) infinite}
@keyframes glitchShift{0%{transform:translateX(-6px)}50%{transform:translateX(5px)}100%{transform:translateX(-2px)}}

/* ---------- overlay ---------- */
.overlay{position:absolute;inset:0;display:none;align-items:flex-start;justify-content:center;
  background:rgba(3,6,12,.82);z-index:5;overflow-y:auto;padding:14px;
  -webkit-overflow-scrolling:touch}
.overlay.show{display:flex}
.card{
  width:min(560px,88%);padding:26px 28px 22px;position:relative;
  background:linear-gradient(180deg, rgba(12,21,36,.97), rgba(7,11,20,.98));
  border:1px solid rgba(84,233,255,.26);
  box-shadow:0 0 60px -14px rgba(84,233,255,.4), inset 0 1px 0 rgba(255,255,255,.06);
  clip-path:polygon(14px 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%,0 14px);
  animation:cardIn .3s cubic-bezier(.2,.9,.2,1);
  margin:auto;flex:0 0 auto;
}
@keyframes cardIn{from{transform:translateY(12px) scale(.975)}to{transform:none}}
.card-kicker{font-family:var(--mono);font-size:9px;letter-spacing:.32em;color:var(--cyan);opacity:.8}
.card h2{margin:9px 0 2px;font-size:26px;letter-spacing:.12em;font-weight:600;
  text-shadow:0 0 30px rgba(84,233,255,.35)}
.card h2 em{font-style:normal;color:var(--mag);text-shadow:0 0 26px rgba(255,88,173,.5)}
.card .sub{font-family:var(--mono);font-size:10px;color:var(--dim);letter-spacing:.18em;margin-bottom:14px}
.card p{margin:0 0 10px;font-size:13px;line-height:1.85;color:#a8c2d8}
.card p.hi{color:var(--cyan);font-size:12.5px}
.card .rule{height:1px;background:linear-gradient(90deg,var(--cyan-dim),transparent);margin:16px 0}
.card-actions{display:flex;gap:10px;align-items:center;margin-top:16px;flex-wrap:wrap}
.card-actions .hintk{margin-left:auto;font-family:var(--mono);font-size:9px;color:var(--dim);letter-spacing:.1em}
.lvlgrid{display:grid;grid-template-columns:repeat(8,1fr);gap:6px;margin-top:6px}
.lvlgrid button{font-family:var(--mono);font-size:10px;padding:7px 0;background:rgba(84,233,255,.05);
  border:1px solid rgba(84,233,255,.16);color:var(--dim);cursor:pointer;transition:.15s}
.lvlgrid button:hover{color:#fff;border-color:var(--cyan);background:rgba(84,233,255,.14)}
.lvlgrid button.done{color:var(--green);border-color:rgba(92,242,180,.4)}
.lvlgrid button.avail{color:var(--cyan);border-color:rgba(84,233,255,.55);background:rgba(84,233,255,.12)}
.lvlgrid button.cur{color:var(--bg);background:var(--cyan);border-color:var(--cyan);font-weight:700}
.stat-row{display:flex;gap:22px;margin:14px 0 2px;font-family:var(--mono)}
.stat-row div{display:flex;flex-direction:column;gap:3px}
.stat-row span{font-size:8px;letter-spacing:.2em;color:var(--dim)}
.stat-row b{font-size:19px;font-weight:500;color:var(--cyan)}

/* ---------- toast ---------- */
.toast{position:absolute;left:50%;bottom:16px;transform:translate(-50%,8px);z-index:6;
  padding:6px 14px;font-size:11px;letter-spacing:.12em;color:#ffd9ea;
  background:rgba(60,10,30,.85);border:1px solid rgba(255,88,173,.45);
  clip-path:polygon(5px 0,100% 0,100% calc(100% - 5px),calc(100% - 5px) 100%,0 100%,0 5px);
  opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;white-space:nowrap}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- footer ---------- */
.foot{display:flex;align-items:center;gap:14px;padding:10px 4px 2px;
  border-top:1px solid rgba(84,233,255,.08);margin-top:10px;min-height:34px}
.keys{display:flex;gap:14px;flex-wrap:wrap;font-size:10px;color:var(--dim);flex:0 0 auto}
.keys span{display:inline-flex;align-items:center;gap:4px}
kbd{font-family:var(--mono);font-size:9px;color:#a9c6dd;background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.1);border-bottom-color:rgba(255,255,255,.18);
  border-radius:2px;padding:1px 4px;line-height:13px}
.tip{font-size:11px;color:#7e9cb6;margin-left:auto;text-align:right;line-height:1.5;
  transition:opacity .3s;max-width:52%}

/* ---------- touch ---------- */
.touchpad{display:none;margin:6px auto 2px;gap:8px;
  grid-template-columns:repeat(3,60px);
  grid-template-areas:". u ." "l s r" ". d ." "e e e";
  justify-content:center;user-select:none;-webkit-user-select:none;touch-action:none}
.touchpad button{
  height:54px;font-size:17px;color:var(--cyan);line-height:1;
  background:rgba(10,20,34,.9);border:1px solid rgba(84,233,255,.28);
  border-radius:10px;touch-action:none;transition:background .1s,transform .06s;
  font-family:var(--sans)}
.touchpad button:active{background:rgba(84,233,255,.26);transform:scale(.96)}
.touchpad .sw{color:var(--mag);border-color:rgba(255,88,173,.4);font-size:19px}
.touchpad .endbtn{
  height:44px;font-size:12px;letter-spacing:.14em;color:#ffd9ea;
  border-color:rgba(255,88,173,.42);background:rgba(255,88,173,.10)}
.touchpad .endbtn:active{background:rgba(255,88,173,.24)}

body.touch{overflow-y:auto;align-items:center;touch-action:manipulation;-webkit-touch-callout:none}
@media (max-height:720px){body.touch{align-items:flex-start}}
body.touch .overlay{position:fixed;inset:0;z-index:40;padding:16px;align-items:flex-start}
body.touch #app{padding:8px 8px calc(12px + env(safe-area-inset-bottom)) 8px}
body.touch .touchpad{display:grid}
body.touch .keys{display:none}
body.touch .foot{justify-content:center;padding-bottom:2px}
body.touch .tip{margin:0;text-align:center;max-width:100%;font-size:11.5px}

@media (max-width:520px){
  .card{padding:20px 18px 16px;width:min(560px,100%)}
  .card h2{font-size:19px;letter-spacing:.06em}
  .card .sub{font-size:9px;letter-spacing:.12em;margin-bottom:10px}
  .card p{font-size:12.5px;line-height:1.75;margin-bottom:8px}
  .card-kicker{font-size:8px;letter-spacing:.24em}
  .lvlgrid{gap:4px}
  .lvlgrid button{padding:6px 0;font-size:9px}
  .card-actions{margin-top:12px;gap:8px}
  .card-actions .hintk{display:none}
  .stat-row b{font-size:17px}
}

@media (max-width:720px){
  #app{padding:8px}
  .frame{padding:10px 10px 6px;width:100%}
  .hud{grid-template-columns:minmax(0,1fr) auto;gap:8px}
  .ctrl-cell{gap:4px}
  .ctrl-cell .btn.primary{padding:6px 8px;font-size:10px;letter-spacing:.04em}
  .ctrl-cell .btn.primary kbd{display:none}
  .btn.icon{padding:6px 6px;min-width:26px}
  .lvl-name{font-size:11px;letter-spacing:.08em}
  .mid-cell{grid-column:1/-1;grid-row:2}
  .brand-cell{grid-column:1;grid-row:1}
  .ctrl-cell{grid-column:2;grid-row:1}
  .lvl-tag{font-size:20px}
  .lvl-name{font-size:12px}
  .foot{flex-direction:column;align-items:flex-start;gap:6px}
  .tip{margin-left:0;text-align:left;max-width:100%}
  .card{padding:20px}
  .card h2{font-size:21px}
}