:root{--bg:#0f1a24;--panel:#1a2a3a;--text:#f0f6fc;--muted:#9bb0c4;--warn:#fbbf24;--good:#6ee7b7;--bad:#fca5a5;--touch:64px}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
body{min-height:100dvh;font-family:"PingFang TC","Noto Sans TC",system-ui,sans-serif;background:radial-gradient(ellipse at 70% 0%,#3b2a1a,transparent 50%),radial-gradient(ellipse at 20% 100%,#1e3a5f,transparent 45%),var(--bg);color:var(--text);padding:max(.5rem,env(safe-area-inset-top)) .7rem max(.5rem,env(safe-area-inset-bottom));user-select:none}
button{font:inherit;border:none;cursor:pointer;color:inherit}
button:active{transform:scale(.98)}
.app{max-width:560px;margin:0 auto;min-height:calc(100dvh - 1rem);display:flex;flex-direction:column}
.screen{display:flex;flex-direction:column;gap:.55rem;flex:1;min-height:0}
.hidden{display:none!important}
h1{text-align:center;font-size:clamp(1rem,3.5vw,1.3rem);color:#fcd34d;font-weight:900}
.gentle{text-align:center;color:var(--muted);font-weight:600}
.panel{background:var(--panel);border-radius:16px;padding:.9rem;border:1px solid rgba(251,191,36,.25)}
.label{color:var(--warn);font-weight:800;margin:.35rem 0}
.chips{display:flex;flex-wrap:wrap;gap:.4rem}
.chip,.chips button{min-height:var(--touch);padding:.45rem .75rem;border-radius:14px;background:rgba(0,0,0,.28);border:2px solid rgba(155,176,196,.25);font-weight:800}
.chip.active,.chips button.active{border-color:var(--warn);background:rgba(251,191,36,.18);color:var(--warn)}
.cur{font-weight:800;margin:.4rem 0}.cur span{color:var(--warn)}
.btn-go{width:100%;min-height:68px;margin-top:.6rem;border-radius:16px;font-weight:900;font-size:1.15rem;background:linear-gradient(180deg,#fcd34d,#f59e0b);color:#451a03}
.btn{min-height:52px;border-radius:14px;font-weight:800;padding:0 .8rem;background:rgba(255,255,255,.1);flex:1}
.btn.ghost{background:rgba(0,0,0,.22)}
.bar{flex-shrink:0;display:flex;flex-wrap:wrap;gap:.5rem;justify-content:space-between;font-weight:800;background:var(--panel);padding:.55rem .7rem;border-radius:14px}
.bar b{color:var(--warn)}
.qcard{background:var(--panel);border-radius:18px;padding:1rem;border:1px solid rgba(251,191,36,.2);min-height:0;flex:1;overflow:auto}
.qphoto{display:block;width:min(52vw,200px);height:min(52vw,200px);object-fit:cover;object-position:center 28%;border-radius:18px;margin:0 auto .75rem;border:3px solid rgba(251,191,36,.55);box-shadow:0 8px 20px rgba(0,0,0,.35);filter:contrast(1.1) saturate(1.12) brightness(1.03);background:#1e293b}
.qphoto.hidden{display:none!important}
.qtext{font-size:clamp(1.25rem,5vw,1.55rem);font-weight:900;line-height:1.45;margin-bottom:1rem;text-align:center;color:#fef3c7}
.answers{display:flex;flex-direction:column;gap:.55rem}
.ans{min-height:64px;border-radius:16px;padding:.7rem 1rem;font-weight:800;font-size:1.1rem;text-align:left;background:rgba(0,0,0,.28);border:3px solid rgba(255,255,255,.12)}
.ans.correct{border-color:var(--good);background:rgba(110,231,183,.18);color:var(--good)}
.ans.wrong{border-color:var(--bad);background:rgba(252,165,165,.15);color:var(--bad)}
.ans:disabled{opacity:1}
.feedback{text-align:center;margin-top:.8rem;font-weight:800;min-height:1.4em;color:var(--muted)}
.feedback.ok{color:var(--good)}.feedback.no{color:var(--bad)}
.row{display:flex;gap:.4rem;flex-shrink:0}
.overlay{position:fixed;inset:0;background:rgba(5,12,20,.75);display:flex;align-items:center;justify-content:center;padding:1rem;z-index:20}
.card{background:var(--panel);border-radius:18px;padding:1rem;width:min(420px,100%);border:1px solid rgba(251,191,36,.3)}
.card h2{text-align:center;color:var(--warn);margin-bottom:.5rem}
#lb-table table{width:100%;border-collapse:collapse;font-size:.9rem}
#lb-table th,#lb-table td{padding:.4rem;border-bottom:1px solid rgba(255,255,255,.08);font-weight:700}
#lb-table tr.me td{color:var(--warn)}