:root{--ink:#243c36;--muted:#637971;--green:#176b5b;--pale:#eaf3ed;--line:#dce5de;--paper:#fff;--bg:#f5f6f1;--red:#a34238;--amber:#865c20;--radius:18px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}button,input,select,textarea{font:inherit}button,a,input,select,textarea{touch-action:manipulation}button{min-height:44px;border:1px solid transparent;border-radius:10px;background:var(--green);color:white;padding:10px 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0}.history-row{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:17px 0;border-bottom:1px solid var(--line)}.history-row:last-child{border-bottom:0}.history-row p{font-size:13px;color:var(--muted);margin:3px 0 0}.result-score{font-size:44px;color:var(--green);line-height:1.4}.result-line{padding:16px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:15px}.result-line p{font-size:14px;margin:0}.result-summary{background:var(--pale);padding:25px;border-radius:15px;margin-bottom:24px}.source-list{font-size:14px;line-height:2}.source-list a{overflow-wrap:anywhere}.invite-url{font-size:14px;overflow-wrap:anywhere;background:var(--pale);padding:16px;border-radius:10px;margin:15px 0}.inline-form{display:flex;gap:12px}.inline-form input{flex:1}.issue-box{border-top:1px solid var(--line);padding:18px 0;font-size:14px}.issue-box p{white-space:pre-line}.loading{padding:90px 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@media(min-width:1000px){.auth-copy{padding-bottom:50px}}@media(max-width:1000px){.top{gap:14px}.top nav a{padding:10px 12px}.brand small{display:none}.auth-layout{padding:25px 0;gap:40px}.type-grid{grid-template-columns:repeat(2,1fr)}.hero{grid-template-columns:1fr 210px;padding:30px}.hero h1{font-size:32px}.two-cols{grid-template-columns:1fr 1fr}.quiz-layout{grid-template-columns:minmax(0,1fr) 210px}.quiz-aside{padding:18px}.metrics{gap:12px}.metric{padding:17px}}
@media(max-width:700px){body{font-size:15px}.top{height:72px;padding:0 18px}.brand{font-size:20px}.brandmark{width:36px;height:36px;font-size:21px}.top nav{position:fixed;bottom:0;left:0;right:0;background:white;border-top:1px solid var(--line);z-index:20;justify-content:space-around;padding:7px 6px calc(7px + env(safe-area-inset-bottom));gap:0}.top nav a{font-size:12px;padding:10px 13px}#account{gap:4px;font-size:12px}#account button{padding:7px 9px;font-size:12px}main{padding:26px 18px 44px;min-height:calc(100vh - 160px)}footer{padding:20px 18px 95px;display:block;font-size:11px}footer span{display:block}.hero{display:block;padding:25px;border-radius:18px}.hero h1{font-size:30px;letter-spacing:0}.hero p{font-size:14px}.hero-art{display:none}.hero .actions button{padding:10px 15px;font-size:14px}.metrics{grid-template-columns:repeat(2,1fr);gap:12px;margin:18px 0 28px}.metric{padding:15px 18px}.metric strong{font-size:26px}.metric span{font-size:12px}.type-grid{gap:12px}.type-card{padding:18px;gap:8px}.type-card h3{font-size:16px}.type-card .type-icon{width:34px;height:34px;font-size:16px}.type-card button{font-size:13px;padding:8px 10px}.two-cols{grid-template-columns:1fr;gap:18px;margin-top:22px}.card.pad{padding:22px}.section-heading{align-items:start}.section-heading h2{font-size:21px}.section-heading a{font-size:13px}.unit-row{grid-template-columns:95px 1fr 50px;gap:9px}.page-head{margin-bottom:22px}.page-head h1{font-size:27px}.filter-grid{grid-template-columns:repeat(2,1fr);gap:14px}.quiz-layout{display:flex;flex-direction:column;gap:20px}.quiz-main{width:100%;padding:22px 18px}.quiz-aside{width:100%;position:static;padding:20px}.quiz-stem{font-size:18px;line-height:1.8}.quiz-top{margin-bottom:15px;align-items:start}.quiz-top .actions{gap:3px}.quiz-top button{padding:5px 8px;font-size:12px}.option{min-height:62px;padding:13px 12px;font-size:15px;gap:10px}.quiz-bottom{align-items:start}.feedback{padding:18px}.material{padding:16px;font-size:15px}.answer-grid{grid-template-columns:repeat(8,1fr)}.answer-grid button{min-height:44px}.auth-layout{display:flex;flex-direction:column;gap:20px;padding:10px 0}.auth-copy{width:100%}.auth-copy h1{font-size:32px}.auth-copy p{font-size:14px;margin-bottom:0}.auth-card{width:100%;padding:25px}.history-row{gap:12px}.history-row button{padding:8px 12px;font-size:13px}#toast{bottom:85px}.inline-form{flex-wrap:wrap}.inline-form button{width:100%}.bank-stats .badge{font-size:11px}.subquestion textarea{min-height:160px}.result-line{align-items:start}.result-line button{padding:8px 10px;font-size:12px;white-space:nowrap}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.mt{margin-top:24px}progress{width:100%;height:8px;border:0;appearance:none;border-radius:99px;overflow:hidden}progress::-webkit-progress-bar{background:#e9ede7}progress::-webkit-progress-value{background:var(--green)}progress::-moz-progress-bar{background:var(--green)}

.answer-grid button{min-height:44px}#account button{min-width:44px;min-height:44px}

#conflict{max-height:90vh;overflow-y:auto}#conflict textarea{min-height:110px;font-size:14px}#conflict .field{margin-top:14px}[hidden]{display:none!important}

#account span{max-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}#account button{flex-shrink:0}@media(max-width:400px){.top{gap:8px;padding:0 12px}.brand{font-size:18px;gap:8px}.brandmark{width:32px;height:32px}#account span{max-width:45px}#account{gap:2px}#account button{padding:6px;min-width:44px}}