:root{color-scheme:dark;--bg:#141615;--fg:#ecece6;--muted:#94988f;--line:#ffffff13;--gold:#d9bb82;--panel:#1a1d1a;--serif:"Songti SC","Noto Serif CJK SC","STSong","SimSun",serif;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{min-width:320px;background:var(--bg)}body{margin:0;color:var(--fg);background:radial-gradient(ellipse at 50% 34%,#282c241c,transparent 58%),var(--bg);font-size:16px;-webkit-font-smoothing:antialiased}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:disabled{cursor:default}button:focus-visible,a:focus-visible{outline:2px solid var(--gold);outline-offset:6px}button, a{touch-action:manipulation}button svg{width:21px;height:21px;flex-shrink:0}button{border:0}a{color:inherit;text-decoration:none}.app-shell{width:min(1280px,100%);min-height:100svh;margin:auto;padding:0 56px;display:flex;flex-direction:column}.header{height:98px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:inline-flex;align-items:center;gap:12px;font-size:21px;letter-spacing:.14em}.brand-symbol{border:1px solid var(--gold);color:var(--gold);width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-size:17px;letter-spacing:0}.brand-en{font-size:12px;letter-spacing:.2em;color:var(--muted);margin-left:14px}.icon-button{width:44px;height:44px;border:1px solid var(--line);border-radius:50%;background:transparent;color:var(--muted);display:grid;place-items:center;transition:color .2s,border-color .2s}.icon-button:hover{color:var(--gold);border-color:#d9bb8250}.sound-on{display:none}.sound-enabled .sound-on{display:block}.sound-enabled .sound-off{display:none}main{flex:1;display:flex;flex-direction:column;justify-content:center}.simulator{position:relative;text-align:center;padding-top:38px}.eyebrow{color:var(--gold);font-size:12px;letter-spacing:.28em;margin:0 0 14px;opacity:.8}h1{font-family:var(--serif);font-size:clamp(26px,3vw,36px);font-weight:400;letter-spacing:.14em;margin:0;line-height:1.6}h1 span{letter-spacing:0}.stage-wrap{height:330px;width:min(800px,100%);margin:0 auto;position:relative}.stage{width:100%;height:100%;position:relative;cursor:pointer;touch-action:pan-y}.stage canvas{width:100%;height:100%;display:block}.side-label{position:absolute;top:54%;z-index:1;pointer-events:none;font-size:13px;color:var(--muted);display:flex;align-items:center;gap:14px;letter-spacing:.14em}.side-left{left:38px}.side-right{right:38px}.side-label i{font-size:12px;font-style:normal;color:#666d62;letter-spacing:.03em}.side-left:after,.side-right:before{content:"";width:38px;height:1px;background:linear-gradient(90deg,#ffffff24,transparent)}.side-right:before{transform:rotate(180deg)}.loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:12px;font-size:14px;color:var(--muted)}.loading span{width:18px;height:18px;border:1px solid #d9bb8240;border-top-color:var(--gold);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.fallback{position:absolute;inset:30% 12%;font-size:15px;line-height:1.8;color:var(--muted)}.charge-hint{position:absolute;bottom:20px;left:0;right:0;color:var(--gold);font-size:13px;letter-spacing:.12em;opacity:0;transition:opacity .2s}.charging .charge-hint{opacity:1}.result-area{min-height:69px;display:flex;flex-direction:column;align-items:center;gap:8px;margin-top:-3px}.result-label{font-family:var(--serif);font-size:22px;letter-spacing:.15em;color:#c7c9be;transition:color .3s}.result-label.decided{color:var(--gold);font-size:28px;line-height:1}.result-subtitle{font-size:12px;color:var(--muted);letter-spacing:.12em}.controls{margin-top:12px}.flip-button{position:relative;isolation:isolate;min-width:256px;height:57px;display:inline-flex;align-items:center;justify-content:center;gap:14px;color:#29291e;background:#dfc58f;border:1px solid #f4dda5;border-radius:8px;box-shadow:0 5px 24px #0002,inset 0 1px #fff4;overflow:hidden;font-size:16px;transition:background .18s,box-shadow .18s,transform .18s;user-select:none;touch-action:none}.flip-button:hover:not(:disabled){background:#ead39f;box-shadow:0 6px 32px #d9bb821a;transform:translateY(-1px)}.flip-button:active:not(:disabled){transform:translateY(1px)}.flip-button:disabled{color:#b7b8a8;background:#33392f;border-color:#48503f;box-shadow:none}.flip-button>*:not(.charge-fill){position:relative;z-index:2}.button-arrow{font-size:22px;margin-left:12px;opacity:.7}.charge-fill{position:absolute;inset:0;background:#fff6;transform:scaleX(var(--charge,0));transform-origin:left;z-index:1}.control-hint{font-size:12px;color:var(--muted);letter-spacing:.04em;margin:14px 0 0;line-height:1.8}kbd{font-family:inherit;font-size:12px;border:1px solid #ffffff1a;border-radius:3px;padding:1px 5px;margin:0 2px;color:#adb1a3}.session{width:min(672px,100%);margin:36px auto 34px;padding-top:20px;border-top:1px solid var(--line)}.session-heading{display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:13px}.reset-button{background:none;color:var(--muted);font-size:12px;display:inline-flex;align-items:center;gap:6px;padding:6px 0 6px 12px}.reset-button svg{width:14px;height:14px}.reset-button:hover:not(:disabled){color:var(--fg)}.reset-button:disabled{opacity:.35}.session-body{display:flex;align-items:center;gap:30px;padding-top:20px;min-height:67px}.stats{display:flex;align-items:center;gap:28px;flex-shrink:0}.stats>div{display:flex;align-items:baseline;gap:8px}.stats strong{font-size:26px;font-weight:400;font-variant-numeric:tabular-nums;letter-spacing:-.03em}.stats span{font-size:12px;color:var(--muted)}.heads-stat strong{color:var(--gold)}.history-container{flex:1;min-width:0;border-left:1px solid var(--line);padding-left:26px}.history-container p{font-size:12px;color:#7e8577;letter-spacing:.06em;margin:0}.history{list-style:none;padding:0;margin:0;display:flex;align-items:center;justify-content:flex-end;gap:7px;min-height:30px}.history:empty{display:none}.history li{width:27px;height:27px;display:grid;place-items:center;border:1px solid #717b604d;border-radius:50%;color:#a8b09e;font-family:var(--serif);font-size:12px;flex-shrink:0;animation:appear .35s ease-out}.history li.heads{border-color:#d9bb8250;color:var(--gold);background:#d9bb8208}.history li:first-child{box-shadow:0 0 0 3px #ffffff06}.history-container p[hidden]{display:none}footer{padding:23px 0 26px;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:#777e70;font-size:12px;letter-spacing:.06em}@keyframes appear{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
@media(min-height:930px){.simulator{padding-top:55px}.stage-wrap{height:390px}.session{margin-top:44px;margin-bottom:42px}}
@media(max-width:800px){.app-shell{padding:0 30px}.brand-en{display:none}.header{height:80px}.stage-wrap{height:320px}.side-left{left:0}.side-right{right:0}.side-label{gap:8px;font-size:12px}.side-left:after,.side-right:before{width:20px}.session-body{gap:20px}.stats{gap:19px}.history-container{padding-left:18px}.history{gap:5px}.history li{width:24px;height:24px}.history li:nth-child(n+9){display:none}}
@media(max-width:520px){.app-shell{padding:0 23px}.header{height:74px}.brand{font-size:19px}.simulator{padding-top:30px}.eyebrow{font-size:12px;margin-bottom:12px}h1{font-size:25px;letter-spacing:.09em}.stage-wrap{height:290px;width:calc(100% + 24px);margin-left:-12px}.side-label{top:71%;font-size:12px;gap:7px}.side-label i{display:none}.side-left{left:13px}.side-right{right:13px}.side-left:after,.side-right:before{width:15px}.result-area{margin-top:0;min-height:66px}.controls{margin-top:14px}.flip-button{width:244px;height:56px}.keyboard-hint{display:none}.session{margin-top:30px;margin-bottom:28px;padding-top:17px}.session-body{flex-wrap:wrap;gap:20px;padding-top:18px}.stats{width:100%;justify-content:space-between;gap:18px}.stats>div{gap:9px}.stats strong{font-size:25px}.history-container{border:0;padding:0;width:100%;flex-basis:100%;min-height:27px;display:flex;align-items:center;justify-content:center}.history{justify-content:center;gap:8px}.history li{width:25px;height:25px}.history li:nth-child(n+9){display:grid}.history-container p{font-size:12px}footer{padding:20px 0;font-size:12px;letter-spacing:.02em}.control-hint{font-size:12px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}