:root{color-scheme:dark;--bg:#111713;--panel:#1b231e;--line:#333e35;--muted:#a5b0a7;--ink:#f2f5ee;--accent:#c2f568;--radius:20px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 'Noto Sans TC',sans-serif}button,input,select,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--accent);outline-offset:4px}button{border:0}h1,h2,h3,p{margin:0}h1{font-size:32px;letter-spacing:-1px}h2{font-size:21px}h3{font-size:17px}.muted,small{color:var(--muted)}small{font-size:14px}.eyebrow{font-size:13px;letter-spacing:2px;color:var(--accent);font-weight:700}.brand{font-size:21px;font-weight:800;display:flex;align-items:center;gap:10px}.mark{background:var(--accent);color:#111713;padding:0 10px;border-radius:8px;font-weight:900;font-style:italic;font-size:26px}.shell{display:grid;grid-template-columns:240px 1fr;min-height:100vh}.sidebar{border-right:1px solid var(--line);padding:32px 24px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:40px}.sidebar nav{display:grid;gap:10px}.navlink{padding:13px 16px;border-radius:12px;color:var(--muted);display:flex;gap:12px}.navlink.active{color:var(--accent);background:#293626}.sidefoot{margin-top:auto}.main{max-width:1180px;width:100%;margin:auto;padding:30px 44px 100px;align-self:start}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px;font-size:14px}.badge{font-size:12px;border:1px solid #566941;color:var(--accent);border-radius:6px;padding:3px 8px;letter-spacing:1px}.heading{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:26px}.heading p{margin-top:6px;color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;padding:13px 20px;min-height:48px;font-weight:700;background:var(--accent);color:#17200f}.btn.secondary{background:#29322b;color:var(--ink);border:1px solid var(--line)}.btn.ghost{background:transparent;color:var(--muted)}.row{display:flex;gap:16px;align-items:center}.between{justify-content:space-between}.grid{display:grid;gap:20px}.stats{grid-template-columns:repeat(3,1fr);margin-bottom:28px}.card{border:1px solid var(--line);background:var(--panel);padding:24px;border-radius:var(--radius)}.stat strong{font-size:34px;display:block;line-height:1.5}.stat span{font-size:14px;color:var(--muted)}.stat.accent{background:var(--accent);color:#18210f;border-color:var(--accent)}.stat.accent span{color:#42552b}.two{grid-template-columns:1.6fr 1fr}.section-title{display:flex;justify-content:space-between;align-items:center;margin:8px 0 18px}.section-title a{font-size:14px;color:var(--accent)}.student{display:flex;align-items:center;gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}.student:last-child{border-bottom:0}.student .info{flex:1}.student:hover h3{color:var(--accent)}.avatar{height:52px;width:52px;display:grid;place-items:center;border-radius:17px;font-size:22px;background:#344b31;color:#cef2ba;flex-shrink:0}.purple{background:#44394e;color:#d3bee7}.orange{background:#503f2b;color:#efc69a}.time{font-size:15px;min-width:48px}.arrow{color:var(--muted);font-size:24px}.notice{border-left:3px solid #e9b773;background:#342b20;padding:16px 20px;border-radius:0 12px 12px 0;color:#f1cf9c;margin-bottom:22px}.notice p{font-size:14px;margin-top:5px}.progress{height:6px;background:#344039;border-radius:8px;margin:14px 0 6px;overflow:hidden}.progress i{display:block;background:var(--accent);height:100%}.stack{display:grid;gap:16px}.profile{display:flex;align-items:center;gap:20px;margin-bottom:22px}.profile .avatar{height:74px;width:74px;font-size:32px}.metrics{display:flex;gap:30px;flex-wrap:wrap}.metrics strong{font-size:24px}.metrics small{display:block}.muscles{grid-template-columns:repeat(3,1fr)}.muscle{border:1px solid var(--line);border-radius:16px;padding:22px;background:#202b22;text-align:left;color:var(--ink);display:block}.muscle b{font-size:26px;color:var(--accent);display:block;margin-bottom:12px}.muscle:hover{border-color:var(--accent)}.label{display:block;margin:18px 0 8px;font-size:14px;color:#c9d0c8}input,select,textarea{width:100%;background:#111914;color:var(--ink);border:1px solid #475348;border-radius:12px;padding:14px;min-height:50px}textarea{resize:vertical;min-height:90px}.search{margin-bottom:20px}.tabs{display:flex;gap:8px;margin-bottom:22px}.tab{border:1px solid var(--line);color:var(--muted);background:transparent;border-radius:10px;padding:10px 16px;min-height:44px}.tab.active{background:var(--accent);color:#17200f}.body-layout{display:grid;grid-template-columns:1fr 1fr;gap:24px}.body-diagram{height:390px;width:100%}.body-diagram [data-muscle]{fill:#344737;stroke:#a5d168;stroke-width:1.2;cursor:pointer}.body-diagram [data-muscle]:hover,.body-diagram [data-muscle]:focus{fill:var(--accent);outline:none}.exercise{display:block;margin-bottom:14px}.exercise h3{margin-bottom:8px}.exercise .number{font-size:26px;font-weight:700}.green-text{color:var(--accent)}.formgrid{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.preview{margin:24px 0;background:#283723;padding:18px;border-radius:12px}.actions{display:flex;gap:12px;margin-top:24px}.actions>*{flex:1}.back{display:inline-flex;align-items:center;min-height:44px;color:var(--muted);margin-bottom:16px}.history{display:grid;grid-template-columns:100px 1fr auto;padding:18px 0;border-bottom:1px solid var(--line);gap:12px}.empty{padding:32px 16px;text-align:center;color:var(--muted)}.login{min-height:100vh;display:grid;grid-template-columns:1.1fr 1fr}.login-art{padding:60px;background:#c2f568;color:#17200f;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden}.login-art h1{font-size:clamp(48px,5vw,80px);line-height:1.2;letter-spacing:-3px}.login-art .big{font-size:170px;line-height:1;font-weight:800;opacity:.16;letter-spacing:-15px}.login-form{display:grid;place-items:center;padding:32px}.login-form form{width:100%;max-width:390px}.login-form h1{margin-top:35px}.login-form .btn{width:100%;margin-top:20px}.demo-accounts{border-top:1px solid var(--line);margin-top:24px;padding-top:20px}.demo-accounts button{border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:8px;padding:10px;margin:8px 6px 0 0}.bottomnav{display:none}#toast{position:fixed;bottom:95px;left:50%;transform:translateX(-50%);background:var(--accent);color:#17200f;padding:12px 22px;border-radius:12px;z-index:20;display:none;max-width:90%;box-shadow:0 8px 40px #0008}dialog{background:var(--panel);color:var(--ink);border:1px solid var(--line);border-radius:20px;padding:28px;width:min(90%,480px)}dialog::backdrop{background:#000b}.error{color:#ffb5a1;font-size:14px;margin-top:12px}.mobile-brand{display:none}@media(max-width:1000px){.shell{grid-template-columns:190px 1fr}.sidebar{padding:25px 16px}.main{padding:24px}.two{grid-template-columns:1fr}.login-art{padding:36px}.login-art .big{font-size:110px}}@media(max-width:650px){.shell{display:block}.sidebar{display:none}.main{padding:20px 18px 110px}.topbar{margin-bottom:24px}.mobile-brand{display:flex}.topbar>.muted{display:none}h1{font-size:27px}.heading{align-items:flex-start}.heading .btn{padding:12px;font-size:14px}.stats{gap:9px;margin-bottom:22px}.stat.card{padding:14px}.stat strong{font-size:29px}.stat span{font-size:12px}.card{padding:20px}.two{gap:22px}.bottomnav{display:flex;position:fixed;bottom:0;left:0;right:0;background:#172019f5;border-top:1px solid var(--line);justify-content:space-around;padding:10px 8px max(10px,env(safe-area-inset-bottom));z-index:10}.bottomnav a{display:grid;text-align:center;color:var(--muted);font-size:12px;gap:2px;min-width:66px;padding:5px}.bottomnav a.active{color:var(--accent)}.bottomnav b{font-size:21px}.muscles{gap:10px}.muscle{padding:16px}.muscle b{font-size:23px;margin-bottom:8px}.muscle small{font-size:12px}.body-layout{grid-template-columns:1fr}.body-diagram{height:320px}.body-layout .muscles{grid-template-columns:repeat(3,1fr)}.metrics{gap:24px}.login{display:block}.login-art{display:none}.login-form{min-height:100vh;padding:26px}.formgrid{gap:0 12px}.history{grid-template-columns:75px 1fr auto;font-size:14px}.profile{gap:14px}.profile .avatar{height:62px;width:62px}.row{gap:12px}}