:root{--ink:#142329;--muted:#6d7c80;--line:#dce5e4;--paper:#f7f9f8;--card:#fff;--teal:#087f80;--teal-dark:#066365;--teal-pale:#e5f3f1;--orange:#d97732;--orange-pale:#fff0e5;--red:#b64a45;--shadow:0 20px 50px rgba(20,35,41,.08)}
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@media (max-width:900px){.home-layout{grid-template-columns:1fr;gap:40px;padding-top:58px}.home-intro h1{font-size:54px}.hint{display:block;margin:12px 0 0}.exam-main{display:block;padding-top:22px}.answer-card{position:fixed;z-index:20;top:0;right:0;bottom:0;width:min(350px,90vw);border-radius:0;transform:translateX(105%);transition:transform .2s;overflow:auto;padding-top:30px}.sheet-open .answer-card{transform:translateX(0)}.sheet-toggle{display:flex;position:fixed;z-index:12;right:18px;bottom:18px;border:0;border-radius:20px;background:var(--ink);color:#fff;padding:10px 15px;gap:8px;box-shadow:0 10px 25px rgba(20,35,41,.2);font-size:12px}.close-sheet{display:block;border:0;background:transparent;color:var(--muted);font-size:25px}.question-card{min-height:0}.exam-meta{margin-right:12px}.exam-label{display:none}.timer{font-size:15px}.result-heading{align-items:flex-start;gap:20px;flex-direction:column}.score-layout{grid-template-columns:1fr}.score-hero{min-height:210px}.review-heading{align-items:flex-start;gap:14px;flex-direction:column}}
@media (max-width:560px){.topbar,.exam-topbar{height:62px;padding:0 16px}.mode-tag{display:none}.brand{font-size:13px}.exam-actions{gap:8px}.button-submit{padding:9px 12px;font-size:12px}.question-toolbar{align-items:flex-start}.question-number{font-size:15px}.question-card{padding:22px 18px}.question-stem{font-size:21px}.option-row{grid-template-columns:19px 25px 1fr;padding:12px 10px}.option-copy{font-size:14px}.question-nav{position:sticky;bottom:0;background:var(--paper);padding:13px 0 4px}.question-nav .button{padding:10px 11px;font-size:12px}.result-main{padding-top:30px}.result-heading h1{font-size:38px}.result-stats{padding:10px}.result-stats div{padding:14px 10px}.score-hero strong{font-size:54px}.review-item{padding:18px 15px}.review-option{padding:8px 9px;font-size:13px}.answer-line{gap:5px}.answer-line strong{margin-right:4px}.modal-card{padding:28px 20px}}
.home-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px}.guide-shell{min-height:100vh}.guide-topbar{position:sticky;top:0;z-index:10;justify-content:space-between;background:#fff}.guide-top-actions{display:flex;align-items:center;gap:16px}.guide-progress{font:500 11px 'DM Mono',monospace;color:var(--muted)}.guide-main{max-width:1400px;margin:0 auto;display:grid;grid-template-columns:272px minmax(0,1fr);gap:38px;padding:34px clamp(16px,4vw,54px) 70px;align-items:start}.guide-nav{position:sticky;top:98px;max-height:calc(100vh - 130px);overflow:auto;background:#fff;border:1px solid var(--line);border-radius:10px;padding:20px;box-shadow:0 9px 28px rgba(20,35,41,.045)}.guide-nav-heading h2{font-size:19px;margin:4px 0 2px}.guide-nav-heading span{font-size:11px;color:var(--muted)}.guide-toc{position:relative;display:grid;gap:2px;margin-top:16px}.guide-search{width:100%;margin-top:14px;padding:9px 11px;border:1px solid var(--line);border-radius:7px;font:inherit;font-size:13px;background:var(--paper);color:var(--ink)}.guide-search:focus{outline:none;border-color:var(--teal);background:#fff}.guide-search-info{margin:8px 0 0;font-size:11px;color:var(--muted)}.guide-toc-link.hit{background:#fff6e8;color:var(--ink)}.guide-toc-link.dim{opacity:.38}.guide-toc-link.hit .guide-toc-count{color:var(--orange)}::highlight(guide-search){background:#ffe9a8}.guide-toc-link{display:flex;justify-content:space-between;align-items:baseline;gap:8px;padding:7px 9px;border-radius:6px;color:var(--muted);text-decoration:none;font-size:12.5px;line-height:1.45}.guide-toc-link:hover{background:var(--paper);color:var(--ink)}.guide-toc-link.active{background:var(--teal-pale);color:var(--teal);font-weight:700}.guide-toc-count{flex:0 0 auto;font:500 10px 'DM Mono',monospace;opacity:.75}.guide-body{min-width:0;max-width:860px}.guide-hero{margin-bottom:26px}.guide-hero h1{font-size:clamp(34px,4.4vw,50px);letter-spacing:-.05em;margin:10px 0 12px}.guide-subtitle{margin:0;max-width:620px;color:var(--muted);font-size:15px}.guide-intro{background:#fff;border:1px solid var(--line);border-radius:10px;padding:clamp(20px,3vw,30px);margin-bottom:26px}.auth-main{min-height:calc(100vh - 74px);display:grid;place-items:center;padding:30px 20px}.auth-card{width:min(420px,100%);background:#fff;border:1px solid var(--line);border-radius:12px;padding:36px;box-shadow:var(--shadow)}.auth-card h1{font-size:32px;letter-spacing:-.04em;margin:8px 0 10px}.auth-copy{color:var(--muted);font-size:13px;margin:0 0 22px}.field{display:grid;gap:6px;margin:0 0 14px}.field span{font-size:12px;color:var(--muted)}.field input{border:1px solid var(--line);border-radius:7px;padding:11px 12px;font:inherit;font-size:14px;background:var(--paper);color:var(--ink)}.field input:focus{outline:none;border-color:var(--teal);background:#fff}.auth-error{color:var(--red);font-size:12.5px;margin:0 0 12px}.home-topbar-right{display:flex;align-items:center;gap:14px}.logout-link{background:none;border:0;padding:0;cursor:pointer;color:var(--teal);font-size:12px;text-decoration:none}.profile-top{display:flex;align-items:center;gap:14px}.profile-user{font-weight:700;font-size:14px}.profile-main{max-width:1050px;margin:0 auto;padding:46px clamp(20px,5vw,55px) 80px}.profile-heading{display:flex;justify-content:space-between;align-items:end;margin-bottom:26px}.profile-heading-actions{display:flex;gap:10px;align-items:center}.profile-heading h1{font-size:40px;letter-spacing:-.05em;margin:8px 0}.profile-sub{color:var(--muted);font-size:13px;margin:0}.profile-stats{background:#fff;border:1px solid var(--line);border-radius:10px;margin-bottom:26px}.attempt-list{display:grid;gap:12px}.attempt-card{display:flex;justify-content:space-between;align-items:center;gap:16px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:20px 22px;flex-wrap:wrap}.attempt-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.attempt-time{color:var(--muted);font-size:12px}.attempt-numbers{display:flex;align-items:baseline;gap:14px;margin-top:8px;flex-wrap:wrap}.attempt-score{font:500 30px "DM Mono",monospace;color:var(--ink)}.attempt-score small{font-size:12px;color:var(--muted)}.attempt-meta{color:var(--muted);font-size:12px}.attempt-actions{display:flex;gap:10px;flex-wrap:wrap}.badge{display:inline-block;padding:4px 9px;border-radius:4px;font:500 11px "DM Mono",monospace}.badge.ongoing{color:var(--orange);background:var(--orange-pale)}.badge.submitted{color:#2c7f5d;background:#e9f6ef}.badge.expired{color:var(--muted);background:var(--paper)}.result-actions{display:flex;gap:10px;align-items:center}.guide-figure{margin:20px 0 24px;overflow-x:auto}.guide-figure img{display:block;width:100%;height:auto;background:#fff;border:1px solid var(--line);border-radius:10px}.guide-chapter{background:#fff;border:1px solid var(--line);border-radius:10px;padding:clamp(22px,3.2vw,38px);margin-bottom:22px;scroll-margin-top:96px}.guide-chapter-title{font-size:clamp(22px,2.6vw,29px);letter-spacing:-.03em;margin:0 0 18px;padding-bottom:14px;border-bottom:1px solid var(--line)}.guide-content{font-size:16px;line-height:1.78}.guide-content p{margin:0 0 14px}.guide-content h3{font-size:17px;color:var(--teal-dark);margin:26px 0 10px}.guide-content ul,.guide-content ol{margin:0 0 16px;padding-left:22px}.guide-content li{margin:0 0 7px}.guide-content li>ul,.guide-content li>ol{margin:7px 0 0}.guide-content strong{font-weight:700}.guide-content code{font-family:'DM Mono',Consolas,monospace;font-size:.92em;background:var(--paper);border:1px solid var(--line);border-radius:4px;padding:1px 5px;overflow-wrap:anywhere}.guide-content .table-scroll{margin:8px 0 20px;overflow-x:auto}.guide-content table{width:100%;border-collapse:collapse;font-size:14px}.guide-content th,.guide-content td{border:1px solid var(--line);padding:9px 11px;text-align:left;vertical-align:top}.guide-content th{background:var(--paper);font-weight:700;white-space:nowrap}.guide-content hr{border:0;border-top:1px solid var(--line);margin:26px 0}.guide-content blockquote{margin:0 0 16px;padding:12px 16px;background:var(--teal-pale);border-left:3px solid var(--teal);color:var(--teal-dark);font-size:14.5px}.guide-modules{margin-top:22px;padding-top:16px;border-top:1px dashed var(--line)}.guide-modules-label{margin:0 0 10px;font:500 11px 'DM Mono',monospace;color:var(--muted);letter-spacing:.04em}.guide-module-list{display:flex;flex-wrap:wrap;gap:7px}.guide-module{display:inline-flex;align-items:center;gap:7px;background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:5px 12px;font-size:12px;color:var(--ink)}.guide-module b{font:500 11px 'DM Mono',monospace;color:var(--teal)}.to-top{position:fixed;right:20px;bottom:20px;z-index:12;width:40px;height:40px;border:0;border-radius:50%;background:var(--ink);color:#fff;font-size:17px;opacity:0;pointer-events:none;transition:opacity .2s;box-shadow:0 10px 25px rgba(20,35,41,.2)}.to-top.visible{opacity:1;pointer-events:auto}
@media (max-width:900px){.guide-main{display:block;padding-top:22px}.guide-nav{position:static;max-height:none;margin-bottom:22px}.guide-toc{max-height:270px;overflow:auto}.guide-body{max-width:none}.guide-chapter{scroll-margin-top:78px}}@media (max-width:560px){.guide-topbar{height:auto;padding:10px 16px;gap:10px}.guide-progress{display:none}.guide-nav{padding:16px}.guide-chapter{padding:20px 16px}.guide-figure img{min-width:760px}.guide-content{font-size:15px}.guide-content table{font-size:13px}}