:root{--carbon:#5ff5c7;--carbon-blue:#54c8ff;--carbon-danger:#ff647c}
html,body{height:100%;overflow:hidden}.carbon-page{background:#06110f;color:#edf8f2}.carbon-page:before{content:"";position:fixed;inset:0;pointer-events:none;background:radial-gradient(circle at 50% 40%,rgba(95,245,199,.08),transparent 34%),linear-gradient(rgba(205,255,229,.022) 1px,transparent 1px),linear-gradient(90deg,rgba(205,255,229,.022) 1px,transparent 1px);background-size:auto,36px 36px,36px 36px}.carbon-shell{height:100vh;width:min(1540px,calc(100% - 38px));margin:auto;position:relative}.carbon-topbar{height:70px;display:flex;align-items:center;gap:24px;border-bottom:1px solid var(--line)}.carbon-topbar .brand{min-width:245px}.carbon-live{margin-left:auto;display:flex;align-items:center;gap:9px;color:var(--muted);font-size:12px}.carbon-live i{width:8px;height:8px;border-radius:50%;background:var(--carbon);box-shadow:0 0 15px var(--carbon);animation:livePulse 1.6s ease-in-out infinite}@keyframes livePulse{50%{opacity:.35;transform:scale(.72)}}
.carbon-main{height:calc(100vh - 70px);padding:14px 0 18px;display:grid;grid-template-rows:auto minmax(0,1fr);gap:13px}.carbon-intro{display:flex;align-items:end;justify-content:space-between;gap:28px}.carbon-intro h1{display:inline-block;font-size:clamp(29px,3vw,43px);line-height:1;margin:7px 14px 0 0;letter-spacing:-.04em}.carbon-intro p{display:inline;color:var(--muted);font-size:14px}.carbon-stats{display:grid;grid-template-columns:repeat(3,112px);border:1px solid var(--line);background:rgba(8,24,20,.72)}.carbon-stats div{padding:9px 13px;border-left:1px solid var(--line)}.carbon-stats div:first-child{border:0}.carbon-stats span{display:block;color:var(--muted);font-size:10px;letter-spacing:.12em}.carbon-stats strong{display:block;font:800 21px/1.25 ui-monospace;color:var(--carbon);margin-top:3px}
.carbon-console{min-height:0;display:grid;grid-template-columns:235px minmax(480px,1fr) 235px;border:1px solid var(--line);background:rgba(7,20,17,.78);box-shadow:0 28px 85px rgba(0,0,0,.36)}.carbon-panel{padding:23px;background:linear-gradient(180deg,rgba(13,31,26,.94),rgba(8,22,18,.86))}.carbon-brief{border-right:1px solid var(--line)}.carbon-vitals{border-left:1px solid var(--line)}.carbon-panel h2{font-size:29px;line-height:1.08;margin:12px 0 24px}.control-list{display:grid;gap:17px}.control-list div{border-left:2px solid rgba(95,245,199,.33);padding-left:12px}.control-list kbd{color:var(--carbon);background:rgba(95,245,199,.08);white-space:nowrap}.control-list p{font-size:12px;color:var(--muted);line-height:1.5;margin:7px 0 0}.pulse-meter,.carbon-bar{margin-top:28px}.pulse-meter>div,.carbon-bar>div{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-bottom:8px}.pulse-meter b{color:var(--carbon)}.pulse-meter>i,.carbon-bar>i{display:block;height:6px;background:#182b25;overflow:hidden}.pulse-meter em,.carbon-bar em{display:block;height:100%;width:100%;background:linear-gradient(90deg,#24a98a,var(--carbon));box-shadow:0 0 14px rgba(95,245,199,.42);transition:width .12s linear}
.carbon-arena{position:relative;min-width:0;min-height:0;overflow:hidden;outline:none;touch-action:none;cursor:crosshair;background:radial-gradient(circle at 50% 50%,rgba(20,72,60,.26),transparent 42%),#040d0c}.carbon-arena:focus-visible{box-shadow:inset 0 0 0 2px var(--carbon)}#carbonCanvas{display:block;width:100%;height:100%}.arena-corner{position:absolute;z-index:2;color:rgba(195,255,231,.32);font:700 9px ui-monospace;letter-spacing:.13em;pointer-events:none}.top-left{top:12px;left:14px}.bottom-right{right:14px;bottom:11px}.game-layer{position:absolute;z-index:6;inset:0;display:none;place-items:center;padding:20px;background:rgba(3,14,12,.78);backdrop-filter:blur(10px)}.game-layer.open{display:grid}.layer-card{text-align:center;width:min(510px,100%);padding:30px 34px;border:1px solid rgba(95,245,199,.28);background:radial-gradient(circle at 50% 0,rgba(95,245,199,.14),transparent 48%),rgba(7,23,19,.94);box-shadow:0 25px 80px rgba(0,0,0,.52)}.core-badge{width:76px;height:76px;margin:0 auto 17px;border-radius:50%;display:grid;place-items:center;position:relative;background:radial-gradient(circle at 35% 28%,#a4ffea,var(--carbon) 38%,#159276 72%);box-shadow:0 0 34px rgba(95,245,199,.38);color:#063b31;font:900 14px ui-monospace}.core-badge i{position:absolute;inset:-11px;border:1px solid rgba(95,245,199,.28);border-radius:50%;border-right-color:var(--lime);animation:badgeSpin 4s linear infinite}@keyframes badgeSpin{to{transform:rotate(360deg)}}.layer-card h2{font-size:31px;margin:9px 0}.layer-card p{color:#afc6bd;font-size:14px;max-width:410px;margin:0 auto 19px}.carbon-primary{border:0;background:var(--carbon);color:#06352d;padding:12px 22px;font-weight:900;cursor:pointer;box-shadow:0 8px 25px rgba(95,245,199,.18);transition:transform .2s,box-shadow .2s}.carbon-primary:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(95,245,199,.3)}.count-flash{position:absolute;z-index:7;inset:0;display:grid;place-items:center;pointer-events:none;font:900 clamp(72px,13vw,150px)/1 ui-monospace;color:var(--carbon);text-shadow:0 0 50px rgba(95,245,199,.42);opacity:0}.count-flash.show{animation:countPop .72s ease}@keyframes countPop{0%{opacity:0;transform:scale(.7)}25%{opacity:1}100%{opacity:0;transform:scale(1.18)}}.hit-flash{position:absolute;inset:0;pointer-events:none;box-shadow:inset 0 0 0 0 rgba(255,100,124,0)}.hit-flash.show{animation:damage .35s ease}@keyframes damage{50%{box-shadow:inset 0 0 70px rgba(255,100,124,.42)}}
.health-readout{padding:21px 0 9px}.health-ring{--health:100;width:142px;height:142px;margin:auto;border-radius:50%;display:grid;place-content:center;text-align:center;background:radial-gradient(circle,#0b1d19 57%,transparent 59%),conic-gradient(var(--carbon) calc(var(--health)*1%),#1a2e28 0);box-shadow:0 0 28px rgba(95,245,199,.09)}.health-ring strong{font:800 38px/1 ui-monospace}.health-ring span{color:var(--muted);font-size:10px;margin-top:6px}.carbon-bar b{color:var(--carbon)}.carbon-bar em{width:5%;background:linear-gradient(90deg,var(--carbon),#ffc857,var(--carbon-danger))}.mission-feed{margin-top:26px;padding:13px 0;border-block:1px solid var(--line);min-height:73px}.mission-feed p{font-size:12px;color:#bed1c9;margin:0;line-height:1.5}.mission-feed i{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--carbon);box-shadow:0 0 8px var(--carbon);margin-right:8px}.best-score{display:flex;justify-content:space-between;align-items:baseline;margin-top:20px}.best-score span{color:var(--muted);font-size:11px}.best-score strong{font:800 18px ui-monospace;color:var(--lime)}
.result-layer{position:fixed;z-index:20;inset:0;display:none;place-items:center;padding:20px;background:rgba(2,10,8,.82);backdrop-filter:blur(15px)}.result-layer.open{display:grid}.result-card{position:relative;width:min(560px,100%);text-align:center;padding:35px;border:1px solid rgba(95,245,199,.34);background:radial-gradient(circle at 50% 0,rgba(95,245,199,.13),transparent 46%),#091a16;box-shadow:0 30px 100px rgba(0,0,0,.58)}.result-close{position:absolute;right:13px;top:8px;border:0;background:none;color:var(--muted);font-size:29px;cursor:pointer}.result-grade{font:900 76px/1 ui-monospace;color:var(--carbon);margin:15px 0 8px;text-shadow:0 0 34px rgba(95,245,199,.3)}.result-card h2{font-size:28px;margin:0}.result-card>p{color:var(--muted);font-size:14px}.result-data{display:grid;grid-template-columns:repeat(3,1fr);margin:22px 0;border-block:1px solid var(--line)}.result-data div{padding:15px 8px;border-left:1px solid var(--line)}.result-data div:first-child{border:0}.result-data span{display:block;color:var(--muted);font-size:10px}.result-data strong{font:800 21px ui-monospace}.result-actions{display:flex;align-items:center;justify-content:center;gap:18px}.result-actions a{color:var(--muted);font-size:13px;text-decoration:none}.result-actions a:hover{color:#fff}
@media(max-width:1080px){.carbon-console{grid-template-columns:190px minmax(450px,1fr) 190px}.carbon-panel{padding:17px}.carbon-panel h2{font-size:24px}.control-list p{font-size:11px}.health-ring{width:118px;height:118px}.carbon-topbar .brand{min-width:215px}.main-nav a{padding-inline:8px;font-size:12px}}
@media(max-width:780px){html,body{overflow:auto}.carbon-shell{width:100%;height:auto;min-height:100vh}.carbon-topbar{height:auto;min-height:64px;padding:9px 12px;flex-wrap:wrap}.carbon-topbar .brand{min-width:0}.carbon-topbar .brand small,.carbon-live{display:none}.carbon-topbar .main-nav{order:3;width:100%;overflow:auto}.carbon-topbar .main-nav a{white-space:nowrap}.carbon-main{height:auto;padding:12px}.carbon-intro{display:block}.carbon-intro p{display:block;margin:5px 0 10px}.carbon-stats{grid-template-columns:repeat(3,1fr)}.carbon-console{display:flex;flex-direction:column}.carbon-brief{order:2;border:0;border-top:1px solid var(--line)}.carbon-vitals{order:3;border:0;border-top:1px solid var(--line)}.carbon-arena{order:1;height:min(72vh,650px);min-height:470px}.carbon-brief h2{display:none}.control-list{grid-template-columns:repeat(3,1fr)}.pulse-meter{margin-top:18px}.carbon-vitals{display:grid;grid-template-columns:150px 1fr;gap:0 18px}.health-readout{grid-row:1/4}.carbon-vitals>.eyebrow{grid-column:1/-1}.carbon-bar,.mission-feed,.best-score{margin-top:14px}.health-ring{width:122px;height:122px}.result-card{padding:30px 18px}}
@media(max-width:520px){html,body{overflow:hidden}.carbon-shell{height:100vh;min-height:0}.carbon-topbar{height:112px;min-height:112px}.carbon-main{height:calc(100vh - 112px);min-height:0;grid-template-rows:auto minmax(0,1fr);padding:9px 12px 12px;gap:9px}.carbon-intro h1{font-size:30px}.carbon-intro p{font-size:12px;margin:2px 0 7px}.carbon-stats div{padding:6px 8px}.carbon-stats strong{font-size:18px}.carbon-console{display:block;position:relative;height:100%;min-height:0}.carbon-arena{height:100%;min-height:0}.carbon-brief{display:none}.carbon-vitals{position:absolute;z-index:5;right:9px;top:9px;width:82px;display:block;padding:0;border:0;background:transparent;pointer-events:none}.carbon-vitals>.eyebrow,.carbon-vitals .carbon-bar,.carbon-vitals .mission-feed,.carbon-vitals .best-score{display:none}.health-readout{padding:0}.health-ring{width:74px;height:74px;background:radial-gradient(circle,rgba(7,25,21,.94) 57%,transparent 59%),conic-gradient(var(--carbon) calc(var(--health)*1%),rgba(26,46,40,.75) 0);box-shadow:0 0 18px rgba(95,245,199,.13)}.health-ring strong{font-size:23px}.health-ring span{font-size:8px;margin-top:3px}.result-data strong{font-size:17px}.layer-card{padding:23px 16px}.layer-card h2{font-size:24px}.layer-card p{font-size:13px}.core-badge{width:64px;height:64px}.arena-corner{display:none}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* Horizontal full-viewport controls */
.carbon-controls{margin-left:auto;display:flex;align-items:center;gap:8px}.carbon-controls .carbon-live{margin-left:0;margin-right:5px}.control-btn{height:34px;display:inline-flex;align-items:center;justify-content:center;padding:0 12px;border:1px solid rgba(95,245,199,.3);background:rgba(95,245,199,.06);color:#dffdf4;text-decoration:none;font:700 12px/1 ui-monospace;cursor:pointer;transition:.2s}.control-btn:hover{border-color:var(--carbon);background:rgba(95,245,199,.13)}.control-btn:disabled{opacity:.35;cursor:not-allowed}.exit-btn{border-color:rgba(255,100,124,.28);color:#ffc5ce}.exit-btn:hover{border-color:var(--carbon-danger);background:rgba(255,100,124,.1)}.pause-card{max-width:430px}.pause-actions{display:flex;align-items:center;justify-content:center;gap:18px}.pause-actions a{color:#ffc5ce;font-size:13px;text-decoration:none}.pause-actions a:hover{color:#fff}

@media(max-width:780px){html,body{overflow:hidden}.carbon-shell{width:100%;height:100vh;min-height:0;padding:0 9px}.carbon-topbar{height:58px;min-height:58px;padding:0;gap:8px;flex-wrap:nowrap}.carbon-topbar .brand{min-width:0;flex:1}.carbon-topbar .brand small,.carbon-controls .carbon-live,.carbon-topbar .main-nav{display:none}.carbon-controls{margin-left:0}.control-btn{height:32px;padding-inline:9px;font-size:11px}.carbon-main{height:calc(100vh - 58px);min-height:0;padding:8px 0 9px;gap:7px;grid-template-rows:auto minmax(0,1fr)}.carbon-intro{display:flex;align-items:end;gap:8px}.carbon-intro>div:first-child{flex:1;min-width:0}.carbon-intro h1{font-size:25px;margin:4px 0 0}.carbon-intro p{display:none}.carbon-stats{grid-template-columns:repeat(3,minmax(58px,1fr));width:230px}.carbon-stats div{padding:5px 7px}.carbon-stats strong{font-size:17px}.carbon-console{height:100%;min-height:0;display:grid;grid-template-columns:minmax(0,1fr) 128px}.carbon-brief{display:none}.carbon-arena{height:100%;min-height:0;order:initial}.carbon-vitals{display:block;position:static;width:auto;order:initial;border-left:1px solid var(--line);border-top:0;padding:12px;background:linear-gradient(180deg,rgba(13,31,26,.94),rgba(8,22,18,.86))}.carbon-vitals>.eyebrow{font-size:9px}.health-readout{padding:12px 0 3px}.health-ring{width:88px;height:88px}.health-ring strong{font-size:26px}.carbon-bar,.mission-feed,.best-score{margin-top:12px}.mission-feed{display:none}.layer-card{width:min(430px,calc(100% - 16px));padding:20px 17px}.layer-card h2{font-size:22px}.layer-card p{font-size:12px}.core-badge{width:58px;height:58px;margin-bottom:12px}.result-card{padding:26px 16px}}
@media(max-width:520px){.carbon-topbar .brand b{font-size:14px}.carbon-topbar .brand-mark{width:34px;height:34px}.exit-btn{font-size:0}.exit-btn:after{content:"退出";font-size:11px}.carbon-intro .eyebrow{font-size:9px}.carbon-stats{width:188px}.carbon-console{grid-template-columns:minmax(0,1fr) 92px}.carbon-vitals{right:auto;top:auto;width:auto;padding:7px;pointer-events:auto}.carbon-vitals>.eyebrow,.carbon-vitals .carbon-bar,.carbon-vitals .best-score{display:none}.health-readout{padding:4px 0}.health-ring{width:70px;height:70px}.health-ring strong{font-size:21px}.health-ring span{font-size:8px}.layer-card h2{font-size:19px}.layer-card p{font-size:11px}.game-layer{padding:7px}.arena-corner{display:none}.result-data strong{font-size:17px}}

.difficulty-select{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:0 auto 18px}.difficulty-select button{padding:10px 8px;border:1px solid rgba(95,245,199,.22);border-radius:11px;background:rgba(95,245,199,.045);color:#dff8ef;cursor:pointer;transition:.2s}.difficulty-select button:hover{transform:translateY(-2px);border-color:rgba(95,245,199,.7)}.difficulty-select button.active{border-color:var(--carbon);background:linear-gradient(180deg,rgba(95,245,199,.2),rgba(95,245,199,.08));box-shadow:inset 0 0 0 1px rgba(95,245,199,.12),0 8px 24px rgba(0,0,0,.2)}.difficulty-select b,.difficulty-select span{display:block}.difficulty-select b{font-size:14px}.difficulty-select span{font:700 9px/1.3 ui-monospace;color:#91b8aa;margin-top:4px}.difficulty-select button.active span{color:var(--carbon)}