@charset "UTF-8";
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var(--line);border-radius:11px;padding:15px;display:flex;gap:13px;align-items:center;text-align:left;background:#fff;width:100%;transition:background .15s,border-color .15s;opacity:1!important}.answer:not(:disabled):hover{border-color:#9fb194;background:#fafcf7}.answer.selected{border-color:#577b45;background:#f1f6e9;box-shadow:0 0 0 1px #577b45}.answer.correct{border-color:#6a9d74;background:#edf6ed}.answer.wrong{border-color:#d19586;background:var(--red-soft)}.letter{display:grid;place-items:center;width:29px;height:29px;background:#f4f6f0;border:1px solid #e1e7da;border-radius:8px;font-size:12px;flex-shrink:0;font-weight:600}.correct .letter{background:#4e7f54;color:#fff;border-color:#4e7f54}.wrong .letter{background:#b36550;color:#fff;border-color:#b36550}.answer-text{flex:1;font-size:14px;line-height:1.65}.answer-text .en{font-family:Arial,sans-serif}.answer-text .ko{margin-top:3px;color:#637466;font-size:13px}.answer-text 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p{font-weight:550;font-size:14px}.sources{display:flex;flex-direction:column;gap:7px;margin-top:15px}.source-link{font-size:12px;display:flex;gap:7px;align-items:baseline;flex-wrap:wrap}.source-link a{color:#496e47}.source-link .external{color:var(--muted);font-size:10px}.source-link svg{width:13px;height:13px}.notes{margin-top:20px}.notes summary{cursor:pointer;font-size:12px;color:var(--muted)}.notes textarea{width:100%;min-height:80px;margin-top:9px;padding:12px;border:1px solid var(--line);border-radius:9px;resize:vertical;background:#fcfdf9;font-size:13px;color:var(--ink)}.flash-prompt{min-height:180px;display:flex;flex-direction:column;justify-content:center}.flash-rule{margin-top:20px;font-size:12px;color:var(--muted)}.flash-answer{margin-top:22px;padding:20px;border:1px solid #dbe7cf;border-radius:12px;background:#f3f8ef}.flash-answer .lang-block p{font-size:16px;font-weight:550}.ratings{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;margin-top:22px}.rating{border:1px solid var(--line);background:#fff;border-radius:10px;padding:11px 5px;font-size:13px;font-weight:600}.rating:hover{border-color:#849977;background:#f3f7ee}.rating small{display:block;font-weight:400;color:var(--muted);font-size:10px;margin-top:2px}.rating.again{border-color:#e1c1b7;color:var(--red)}.rating.easy{background:var(--soft);border-color:#bdd0ad;color:var(--green)}.library-filters{display:flex;gap:10px;margin-bottom:20px}.library-filters .search{flex:1;min-width:100px}.library-filters select{max-width:180px;background:white;border:1px solid var(--line);border-radius:9px;padding:8px}.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}.chip{border:1px solid var(--line);border-radius:20px;padding:6px 13px;font-size:12px;background:#fff}.chip.active{border-color:#9db286;background:#eaf1e0;color:#3c6435}.question-list{display:flex;flex-direction:column;gap:10px}.list-item{padding:18px 20px;background:#fff;border:1px solid var(--line);border-radius:13px;display:flex;align-items:center;gap:16px}.list-item .item-body{min-width:0;flex:1}.list-item .item-body>button{padding:0;text-align:left;display:block;width:100%}.list-item .item-body p{font-size:14px;font-weight:550;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:6px 0}.list-item small{font-size:11px;color:var(--muted)}.list-index{font-size:12px;color:#819174;font-family:Arial,sans-serif}.list-item:hover{border-color:#bfceb3}.empty{padding:60px 20px;text-align:center;background:#fff;border:1px dashed #d3dfc8;border-radius:16px}.empty svg{width:36px;height:36px;color:#9aaa82;margin-bottom:13px}.empty p{color:var(--muted);margin:10px 0 20px;font-size:14px}.list-footer{text-align:center;margin-top:18px;font-size:12px;color:var(--muted)}.summary-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:40px;text-align:center}.summary-seal{width:60px;height:60px;border-radius:50%;margin:0 auto 20px;background:var(--soft);display:grid;place-items:center;color:#668b54}.summary-seal svg{width:30px;height:30px}.score{font-family:Georgia,serif;font-size:65px;letter-spacing:-3px;margin:12px 0 5px;line-height:1.2}.summary-actions{display:flex;gap:10px;justify-content:center;margin-top:25px;flex-wrap:wrap}.summary-detail{max-width:500px;margin:20px auto 0;font-size:13px;color:var(--muted);line-height:1.9}.notice{background:#fff9ec;border:1px solid #e9debd;border-radius:13px;padding:19px 22px;font-size:13px;line-height:1.85}.notice strong{display:block;margin-bottom:5px}.source-panels{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:20px}.source-panels p{font-size:13px;margin-top:10px;color:var(--muted)}.source-panels .btn{margin-top:18px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;margin-top:17px;font-size:13px}th,td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line)}th{font-weight:600;color:var(--muted);font-size:11px}td:last-child,th:last-child{text-align:right}.settings-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.storage-warning{margin-bottom:15px;background:var(--red-soft);color:#9a4537;border:1px solid #e5b7ad;border-radius:10px;padding:12px;font-size:12px}.app-footer{display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--line);padding-top:17px;margin-top:30px;font-size:10px;color:#8e9b87}.link-button{text-decoration:underline;text-underline-offset:3px;padding:0;font-size:inherit;color:var(--green)}.file-input{display:none}#toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,15px);background:#183c30;color:#fff;padding:12px 20px;border-radius:10px;box-shadow:0 5px 30px #142d2b26;z-index:100;opacity:0;pointer-events:none;transition:.2s;max-width:90vw;font-size:13px}#toast.show{opacity:1;transform:translate(-50%,0)}.hidden{display:none!important}.view-intro{margin-bottom:25px}.study-screen{max-width:970px;margin:0 auto}.subtle-line{font-size:11px;color:#8b9987;margin-top:13px}.note-save{font-size:10px;color:var(--muted);margin-top:6px}.origin-detail{font-size:11px;color:var(--muted);margin-top:14px}.mobile-brand{display:none}.progress-domains{margin-top:20px}.progress-domains .domain-row{padding:12px 0;border-bottom:1px solid var(--line)}.date-text{font-size:12px;color:var(--muted)}
@media(min-width:1450px){.content{padding-top:44px}.hero{padding:38px}.hero h1{font-size:38px}}
@media(max-width:1100px){.layout{grid-template-columns:190px minmax(0,1fr)}.sidebar{padding:28px 14px}.topbar{padding:0 26px}.content{padding:28px 26px}.study-grid{grid-template-columns:1fr 1fr}.hero h1{font-size:29px}.hero-visual{width:130px;height:145px}.orbit{width:130px;height:130px}.local-tag{display:none}.stat{padding:15px}.stats{gap:10px}}
@media(max-width:800px){.layout{display:block}.sidebar{position:static;height:auto;padding:13px 20px;display:block}.brand{margin:0}.brand img{width:32px;height:32px}.brand strong{font-size:16px}.brand small{font-size:8px}.nav-label,.sidebar-bottom{display:none}.nav{flex-direction:row;margin-top:14px;gap:4px;overflow-x:auto}.nav button{white-space:nowrap;padding:9px 11px;font-size:12px;flex:1;justify-content:center;gap:6px}.nav button svg{width:15px}.nav-count{display:none}.topbar{height:60px;padding:0 22px}.content{padding:26px 22px}.hero{padding:26px}.stats{grid-template-columns:repeat(4,1fr)}.stat{padding:14px 12px}.stat-top svg{display:none}.stat-number{font-size:25px}.stat-caption{font-size:9px}.question-card{padding:25px}.bilingual{gap:18px}.bilingual>.lang-block+.lang-block{padding-left:18px}.study-grid{grid-template-columns:1.1fr 1fr}.source-panels{grid-template-columns:1fr}.keyboard-hint{display:none}.app-footer{flex-direction:column;gap:3px}}
@media(max-width:570px){.sidebar{padding:12px 14px}.nav{gap:3px;margin-top:12px}.nav button{padding:9px 6px;font-size:11px;gap:4px}.nav button svg{width:14px}.topbar{padding:0 17px;height:57px}.breadcrumb{font-size:11px}.language button{padding:5px 7px;font-size:11px}.content{padding:23px 16px 35px}h1{font-size:27px}.hero{padding:24px 22px;grid-template-columns:1fr}.hero h1{font-size:28px}.hero-visual{display:none}.hero .lead{font-size:13px}.stats{grid-template-columns:repeat(2,1fr);gap:10px;margin:15px 0 22px}.stat{padding:15px 17px}.stat-top svg{display:block}.stat-caption{font-size:10px}.study-grid{grid-template-columns:1fr;gap:15px}.panel{padding:20px}.section-head{margin-top:20px}.section-head p{font-size:10px}.page-title{align-items:flex-start;flex-direction:column;gap:12px}.page-title .btn{align-self:flex-start}.study-header{gap:8px;align-items:flex-start}.study-header .title strong{font-size:13px}.study-header .title small{font-size:10px}.question-card{padding:21px 18px;border-radius:14px}.question-meta{margin-bottom:18px;align-items:flex-start}.meta-tags{gap:5px}.tag{font-size:10px;padding:3px 6px}.qid{font-size:9px;white-space:nowrap;padding-top:4px}.bilingual{grid-template-columns:1fr;gap:17px}.bilingual>.lang-block+.lang-block{border-left:0;border-top:1px solid var(--line);padding:16px 0 0}.question-stem{font-size:16px}.question-stem.en{font-size:17px}.answers{gap:9px;margin-top:22px}.answer{padding:12px 10px;gap:10px}.letter{width:25px;height:27px}.answer-text{font-size:13px}.answer-text .ko{font-size:12px}.answer-result{font-size:10px}.question-actions{justify-content:flex-end}.question-actions .btn{width:100%}.ratings{gap:6px}.rating{font-size:12px;padding:10px 2px}.rating small{font-size:9px}.library-filters{flex-wrap:wrap}.library-filters .search{flex-basis:100%}.library-filters select{max-width:none;flex:1;width:40%}.list-item{padding:15px 13px;gap:10px}.list-item .item-body p{font-size:13px}.list-index{display:none}.list-item .icon-btn{width:33px;height:33px}.summary-card{padding:30px 20px}.score{font-size:55px}.resume{padding:13px;gap:10px}.resume p{font-size:12px}.resume .btn{white-space:nowrap}.flash-prompt{min-height:100px}.source-panels{gap:13px}.stat-top{font-size:11px}.notice{padding:17px;font-size:12px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{.sidebar,.topbar,.question-actions,.ratings,.app-footer{display:none}.layout{display:block}.content{padding:0}.question-card{border:0}body{background:#fff}}

/* Source-linked study audit and mobile reference library. */
.reference-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:20px}
.reference-card{border:1px solid var(--line);border-radius:12px;padding:18px;min-width:0;overflow-wrap:anywhere}
.reference-card p{margin-top:10px}.reference-card small{color:var(--muted)}
.reference-card .start-controls{flex-wrap:wrap;margin-top:12px}
.checkpoint-list{margin-top:15px}.checkpoint-list summary{cursor:pointer;color:var(--green);font-weight:650}
.checkpoint{display:flex;align-items:center;gap:12px;justify-content:space-between;border-top:1px solid var(--line);padding:12px 0}
.checkpoint strong{font-size:13px}.checkpoint small{display:block;color:var(--muted)}.checkpoint .btn{flex-shrink:0}
.pitfall-box{border-left:3px solid #c7ab70;background:var(--yellow);padding:15px;margin:16px 0;border-radius:8px}
.pitfall-box h3{font-size:14px;margin-bottom:8px}.study-steps{padding-left:22px}.study-steps li{margin:12px 0}
.coverage-domain>p{margin:12px 0}.coverage-domain .section-head{flex-wrap:wrap}
@media(max-width:700px){.reference-grid{grid-template-columns:minmax(0,1fr)}.checkpoint{align-items:flex-start}.checkpoint strong{overflow-wrap:anywhere}.coverage-topic>div{min-width:0}}