body{font-weight:400}button,input,select,textarea{font-family:var(--font-ui);font-variant-numeric:tabular-nums}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.3;letter-spacing:-.01em}#root h1{font-size:22px;line-height:1.3;letter-spacing:-.01em}#root h2,#root h3{font-size:16px}button,label,summary,th,.small-link,.ps-file-actions a{font-weight:500}input,textarea,select,p{font-weight:400}b,strong{font-weight:600}[hidden]{display:none!important}#root :focus-visible{outline:2px solid var(--primary);outline-offset:2px}#root button,#root input:not([type=checkbox]):not([type=radio]),#root textarea,#root select,#root .ps-file-actions a{border-radius:6px}#root button,#root .ps-file-actions a{min-height:32px;padding:4px 12px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font-size:13px;line-height:1.5}#root button:hover:not(:disabled),#root .ps-file-actions a:hover{background:var(--hover)}#root button:disabled{opacity:.5;cursor:default}#root :is(.primary-btn,.primary-inline,.ql-primary,.ps-primary,.ea-primary){background:var(--primary);border-color:var(--primary);color:var(--surface)}#root :is(.primary-btn,.primary-inline,.ql-primary,.ps-primary,.ea-primary):hover:not(:disabled){background:var(--primary-2)}#root :is(.text-btn,.back-btn,.small-link){background:transparent;border-color:transparent}#root :is(.danger,.ps-delete,.vocab-library-delete){color:var(--bad);background:transparent;border-color:transparent;width:auto}#root :is(.danger,.ps-delete) svg{display:none}#root :is(.student-shell,.student-login,.student-session-bar) button,#root .student-shell .ps-file-actions a{min-height:40px}#root input:not([type=checkbox]):not([type=radio]),#root select{min-height:32px;padding:4px 12px;border:1px solid var(--line);color:var(--ink);background-color:var(--surface)}#root textarea{padding:8px 12px;border:1px solid var(--line)}#root input[type=checkbox],#root input[type=radio]{accent-color:var(--accent);width:16px;height:16px;flex-shrink:0}#root select.ui-select{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='currentColor' stroke-width='1.5'%3E%3Cpath d='m4 6 4 4 4-4'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 8px center;padding-right:32px}#root input.ui-file{max-width:100%;min-width:0;font-size:13px;padding:4px}.ui-file::file-selector-button{border:0;border-right:1px solid var(--line);background:var(--bg-warm);color:var(--ink);font:inherit;font-weight:500;padding:4px 12px;margin-right:8px;cursor:pointer}.ui-disclosure>summary{display:list-item;cursor:pointer;list-style:none}.ui-disclosure>summary::-webkit-details-marker{display:none}.ui-disclosure>summary:after{content:"";display:inline-block;float:right;width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg);margin:4px}.ui-disclosure[open]>summary:after{transform:rotate(225deg)}.brand-logo{display:block;width:auto;height:40px;object-fit:contain}.info-tip{position:relative;display:inline-flex;margin-left:8px;vertical-align:middle;font-size:14px;font-weight:400}#root .info-tip .info-trigger{border:0;background:transparent;padding:4px;color:var(--ink-3);font-size:16px;line-height:1;min-width:24px;min-height:24px}.info-content{position:fixed;z-index:1100;width:min(280px,calc(100vw - 32px));padding:12px;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--ink-2);font-size:13px;font-weight:400;line-height:1.5;text-align:left;letter-spacing:normal}.info-content ol{margin:0;padding-left:16px}#root .admin-shell{grid-template-columns:200px minmax(0,1fr)}#root .admin-sidebar{background:var(--bg-warm);padding:24px 12px;gap:4px}#root .admin-sidebar .brand{padding:0 12px;margin-bottom:24px}#root .admin-sidebar button{border:0;border-left:2px solid transparent;border-radius:0;background:transparent;text-align:left;justify-content:flex-start}#root .admin-sidebar button.active{border-left-color:var(--accent);font-weight:600;color:var(--ink)}#root .admin-main{padding:32px;font-size:14px}#root .admin-head{margin-bottom:24px}#root .stats strong{font-size:24px}#root .admin-jump-tabs,#root .tab-row,#root .vocab-mode-tabs{gap:0;border-bottom:1px solid var(--line);padding:0}#root .admin-jump-tabs button,#root .tab-row button,#root .vocab-mode-tabs button{background:transparent;border:0;border-bottom:2px solid transparent;border-radius:0}#root .admin-jump-tabs [aria-selected=true],#root .tab-row button.active,#root .vocab-mode-tabs button.active{color:var(--ink);border-bottom-color:var(--accent);font-weight:600}#root .admin-main table{width:100%;border-collapse:collapse;font-size:13px}#root .admin-main th,#root .admin-main td{height:40px;padding:0 12px;text-align:left;border:0;border-bottom:1px solid var(--line-2);vertical-align:middle}#root .admin-main th{color:var(--ink-2);background:var(--bg-warm);font-size:12px;font-weight:500}#root .admin-main tbody tr:hover{background:var(--hover)}#root .admin-main td:last-child:has(button,a),#root .admin-main th.actions-column{text-align:right}#root .admin-main table :is(button,a){min-height:32px;padding:4px 8px;background:transparent;border-color:transparent;font-size:13px}#root .admin-main table :is(button,a):hover{text-decoration:underline}#root .admin-main table .row-actions{display:table-cell;white-space:nowrap}#root .admin-main table .row-actions button{margin:0}.ui-table-wrap{width:100%;overflow-x:auto}.ui-row{cursor:pointer}#root .admin-main .num{font-family:var(--font-mono);text-align:right}.num,time,.question-id,.ql-tree b,.ql-pagination>span,.ps-pagination>span{font-family:var(--font-mono);font-variant-numeric:tabular-nums}.question-id{display:block;color:var(--ink-3);font-size:12px;margin:8px 0}#root .file-type,#root .file-icon,#root .ql-tags span,#root .ql-badge,#root .ea-badge{display:inline-flex;border:1px solid var(--line);border-radius:4px;background:var(--surface);color:var(--ink-2);font-size:12px;padding:0 4px;gap:4px}#root .ql-tags{gap:4px}#root .ql-tree button,#root .ql-all{border:1px solid transparent;border-radius:4px;padding:4px}#root .ql-classifications button[aria-pressed=true]{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}#root .ql-tree b{margin-left:auto;text-align:right;font-size:12px;color:var(--ink-2)}#root .ql-tree b[data-zero=true]{color:var(--ink-3)}#root .ql-answer-number{color:var(--accent);font-family:var(--font-mono)}#root .status-info{background:var(--info-soft);color:var(--info);border:1px solid var(--line);border-radius:4px;padding:0 4px;font-size:12px}#root .ql-error,#root .ps-error,#root .ea-error,#root .error{background:var(--bad-soft);color:var(--bad)}#root .ql-notice,#root .ea-notice,#root .ps-pending{color:var(--notice);background:var(--notice-soft)}.ql-row-feature{display:block;max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}#root .ql-title{text-align:left}#root .ql-detail pre,#root .exam-assembler pre,#root .exam-assembler code{font-family:var(--font-ui)}#root .ps-progress progress{height:2px;border:0;border-radius:0;accent-color:var(--accent);background:var(--line-2)}#root .ps-progress progress::-webkit-progress-bar{background:var(--line-2)}#root .ps-progress progress::-webkit-progress-value{background:var(--accent)}#root .ps-progress progress::-moz-progress-bar{background:var(--accent)}#root .ps-upload{border-style:solid;background:var(--bg-warm)}#root .ps-file-actions{align-items:center;justify-content:flex-end;gap:4px}#root .admin-main .ps-file-actions{flex-wrap:nowrap}#root .ps-file-actions :is(button,a){white-space:nowrap}#root td>p{margin:0;font-size:12px;color:var(--ink-3)}#root td .vocab-library-main{width:100%;text-align:left;justify-content:flex-start;padding:0}#root td .vocab-library-main span{display:flex;align-items:center;gap:12px}#root .empty,#root .ps-empty{padding:24px 0;border:0;background:transparent;color:var(--ink-3);font-size:13px}#root .empty>svg,#root .ps-empty>svg{display:none}#root .student-login{position:relative;background:var(--bg);padding:96px 24px 32px}#root .student-login .login-card{width:min(100%,360px);border:0;border-radius:0;padding:0;gap:16px}#root .student-login .brand{position:absolute;top:24px;left:24px}#root .student-login input:not([type=checkbox]){min-height:40px}#root .student-shell{padding:24px 32px 32px}#root .student-session-bar{padding:12px 24px}#root .ps-heading{margin-bottom:24px}#root .ps-heading h1{margin:0}#root .ps-summary strong{font-size:20px}#root .modal-card,#root .wide-modal{box-shadow:var(--floating-shadow)}@media(max-width:1100px){#root .admin-shell{grid-template-columns:1fr}#root .admin-sidebar{position:static;height:auto;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));padding:16px 24px;border-bottom:1px solid var(--line)}#root .admin-sidebar .brand{grid-column:1 / -1;margin-bottom:12px}}@media(max-width:700px){#root .admin-main,#root .student-shell{padding:24px}#root .admin-sidebar{padding:16px}#root .student-session-bar{gap:8px;align-items:center}#root .student-session-bar strong{min-width:0}#root button,#root .ps-file-actions a{min-height:40px}#root input:not([type=checkbox]):not([type=radio]),#root select,#root textarea{min-height:40px;font-size:16px}#root .ps-search{align-items:stretch}#root .ps-search label{min-width:0;flex-basis:100%}#root .ps-list{padding:16px}#root .ps-file-actions{justify-content:flex-start;flex-wrap:wrap}#root .tab-row{flex-wrap:wrap}#root .ps-summary{white-space:normal}}#root button,#root label,#root summary{font-weight:500}#root .admin-sidebar button.active{font-weight:600}#root small{font-size:12px}#root .manager-actions{justify-content:flex-end}#root .admin-main th.num{font-family:var(--font-ui)}#root .admin-main .align-right{text-align:right}#root :is(.success,.answer-review.correct,.exercise-review-card.correct,.exercise-choice.correct,.exercise-result-note.correct){color:var(--green);background:var(--green-soft);border-color:var(--line)}#root :is(.answer-review.incorrect,.exercise-review-card.incorrect,.exercise-choice.wrong,.exercise-result-note.wrong){color:var(--bad);background:var(--bad-soft);border-color:var(--line)}#root .correct-btn{color:var(--green)}#root .wrong-btn{color:var(--bad)}#root :is(.notice-pill,.file-badge,.test-status,.exercise-type,.answer-review em){border-radius:4px}#root .admin-main table .vocab-library-main{min-height:32px}#root .exercise-choice.selected:not(.correct):not(.wrong){border-color:var(--primary);background:var(--primary-soft)}#root .admin-main tbody tr:has(input[type=checkbox]:checked){background:var(--primary-soft)}#root .answer-review.needs_review{color:var(--info);background:var(--info-soft);border-color:var(--line)}#root .admin-main .answer-review-actions button{width:32px;height:32px}#root .board-counts{margin:0 0 24px;color:var(--ink-2);font-size:14px}#root .board-table .recent-activity{text-align:left;width:136px}#root .board-table .row-actions,#root .board-table .actions-column{width:1%;white-space:nowrap}#root .admin-main table :is(button,a) svg{display:none}#root .toggle-line{border:0;background:transparent;padding:0}#root .toggle-line svg{display:none}#root button:disabled,#root .admin-main table button:disabled{opacity:1;background:transparent;border:1px solid var(--line);color:var(--ink-3)}#root .ps-sharing[aria-pressed=true]:not(:disabled){color:var(--accent)}#root .question-meta{display:block;color:var(--ink-3);font-size:12px}#root .question-meta .question-id{display:inline}@font-face{font-family:Pretendard;src:url(/fonts/PretendardVariable.woff2) format("woff2");font-weight:100 700;font-display:swap}@font-face{font-family:JetBrains Mono;src:url(/fonts/JetBrainsMono-Regular.woff2) format("woff2");font-weight:400;font-display:swap}:root{--bg: #FFFFFF;--bg-warm: #F7F7F7;--surface: #FFFFFF;--ink: #0D0D0D;--ink-2: #444444;--ink-3: #767676;--line: #E5E5E5;--line-2: #F0F0F0;--primary: #111111;--primary-2: #000000;--primary-soft: #F2F2F2;--primary-ink: #111111;--accent: #C8102E;--accent-soft: #FCEBEE;--green: #1E7A46;--green-soft: #EAF5EE;--bad: #C2410C;--bad-soft: #FFEDE3;--notice: #8A6100;--notice-soft: #FFF8DB;--info: #475467;--info-soft: #F2F4F7;--hover: #FAFAFA;--scrim: rgba(0,0,0,.32);--floating-shadow: 0 4px 12px rgba(0,0,0,.08);--shadow: none;--font-ui: Pretendard, system-ui, sans-serif;--font-mono: "JetBrains Mono", Pretendard, monospace;font-family:var(--font-ui);font-variant-numeric:tabular-nums;font-size:14px;line-height:1.5;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0;background:var(--bg)}button,input,textarea,select{font:inherit}button{cursor:pointer}.student-shell{max-width:1100px;margin:0 auto;min-height:100vh;padding:24px clamp(16px,4vw,32px) 32px}.student-shell.narrow{max-width:760px}.student-header,.admin-head,.board-head,.file-head{display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;align-items:center;gap:8px}.brand-mark{width:36px;height:36px;border-radius:8px;display:grid;place-items:center;background:var(--primary);color:var(--surface);font-weight:600}.brand-name{font-weight:600;letter-spacing:-.01em}.brand-sub,.eyebrow{color:var(--ink-3);font-size:12px;letter-spacing:.07em}.eyebrow{text-transform:uppercase}.small-link{color:var(--primary);font-weight:600;text-decoration:none}.hero{padding:32px 0 24px}.hero h1,.board-head h1,.detail-card h1,.admin-main h1{margin:0;letter-spacing:0;line-height:1.5}.hero h1{font-size:24px}.hero-copy{color:var(--ink-2);font-size:16px;max-width:520px;line-height:1.5}.search-box{display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:12px 16px}.search-box input{width:100%;border:0;outline:0;background:transparent}.board-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding-top:16px}.board-card{min-height:148px;border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:16px;text-align:left;display:flex;flex-direction:column;align-items:flex-start;gap:8px}.board-card:hover{transform:translateY(-2px)}.board-name{font-weight:600;font-size:16px;margin-top:auto}.board-meta{display:inline-flex;align-items:center;gap:4px;color:var(--ink-3);font-size:13px}.mono,.modal-mono{width:42px;height:42px;border-radius:8px;display:grid;place-items:center;font-weight:600}.mono-1,.mono-2,.mono-3,.mono-4,.mono-5,.mono-6{background:var(--primary-soft);color:var(--ink-2)}.modal-scrim{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--scrim);display:grid;place-items:center;padding:16px;z-index:20}.modal-card,.login-card{border:1px solid var(--line);width:min(100%,380px);background:var(--surface);border-radius:8px;padding:24px}.modal-card{text-align:center}.modal-mono{width:58px;height:58px;margin:0 auto 12px;font-size:20px}.modal-card h2{margin:0}.modal-card p{color:var(--ink-3);margin:4px 0 16px}.password-input,.login-card input,.upload-card input,.upload-card textarea,.upload-card select,.add-board input,.manager-edit input,.manager-edit textarea,.report-form input,.report-form textarea,.report-form select,.vocab-upload-card input,.vocab-toolbar select,.vocab-test-form input,.vocab-test-form select{width:100%;border:1px solid var(--line);border-radius:8px;padding:12px;background:var(--surface);outline:none}.password-input:focus,input:focus,textarea:focus,select:focus{border-color:var(--primary)}.primary-btn,.primary-inline,.add-board button{border:0;border-radius:8px;background:var(--primary);color:var(--surface);font-weight:600;padding:12px 16px}.primary-btn{width:100%;margin-top:12px}.text-btn{border:0;background:transparent;color:var(--ink-3);margin-top:8px}.form-error,.error{color:var(--bad);background:var(--bad-soft);border:1px solid var(--primary-soft);border-radius:8px;padding:8px 12px;margin:12px 0}.success{color:var(--green);background:var(--bg-warm);border:1px solid var(--primary-soft);border-radius:8px;padding:8px 12px;margin:12px 0}.empty{margin:24px 0;padding:24px;border:1px dashed var(--line);border-radius:8px;color:var(--ink-3);background:var(--bg-warm);display:flex;align-items:center;gap:8px}.back-btn{display:inline-flex;align-items:center;gap:4px;border:0;background:transparent;color:var(--primary);font-weight:600;padding:12px 0}.board-head{justify-content:flex-start;padding:12px 0 16px}.board-head p,.detail-date{color:var(--ink-3);margin:4px 0 0}.post-list{display:flex;flex-direction:column;gap:8px}.tab-row{display:flex;gap:8px;margin:0 0 16px;border-bottom:1px solid var(--line)}.tab-row button{border:0;background:transparent;color:var(--ink-3);font-weight:600;padding:12px 4px}.tab-row button.active{color:var(--primary)}.post-card{width:100%;text-align:left;border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:16px;display:flex;flex-direction:column;gap:8px}.post-card.notice{background:var(--notice-soft);border-color:var(--ink-3)}.post-title-row{display:flex;align-items:center;gap:8px}.post-title{font-weight:600}.notice-pill{display:inline-flex;color:var(--notice);background:var(--bg-warm);border:1px solid var(--primary-soft);border-radius:8px;padding:4px 8px;font-size:12px;font-weight:600}.post-meta{display:flex;align-items:center;justify-content:space-between;color:var(--ink-3);font-size:13px}.file-badge{display:inline-flex;align-items:center;gap:4px;color:var(--primary-ink);background:var(--primary-soft);border-radius:8px;padding:4px 8px;font-weight:600}.detail-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:clamp(16px,4vw,32px)}.report-list,.report-admin-list{display:grid;gap:12px}.report-card,.report-admin-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:16px}.report-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.report-head h2{margin:8px 0 0;font-size:24px}.report-checks{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:12px 0}.report-checks span{background:var(--primary-soft);color:var(--primary-ink);border-radius:8px;padding:8px;font-size:13px}.report-checks strong{display:block;margin-top:4px}.report-notes{display:grid;gap:8px;margin:0}.report-notes div{border-top:1px solid var(--line-2);padding-top:8px}.report-notes dt{color:var(--ink-3);font-size:12px;font-weight:600}.report-notes dd{margin:4px 0 0;color:var(--ink-2);line-height:1.5;white-space:pre-wrap}.vocab-study{display:grid;gap:12px}.vocab-toolbar{display:flex;align-items:center;gap:8px;justify-content:space-between}.vocab-toolbar select{max-width:280px}.vocab-toolbar span{color:var(--ink-3);font-weight:600}.vocab-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:24px;text-align:center}.vocab-card p{color:var(--ink-3);margin:0}.vocab-card h2{font-size:24px;margin:16px 0;letter-spacing:0}.vocab-meaning{margin:12px auto 0;max-width:520px;background:var(--primary-soft);color:var(--primary-ink);border-radius:8px;padding:16px;font-weight:600;line-height:1.5}.vocab-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:16px}.vocab-actions button{border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:8px 12px;font-weight:600}.vocab-wrong,.vocab-preview{display:grid;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:12px}.vocab-wrong span,.vocab-preview span{color:var(--ink-2);line-height:1.5}.vocab-library-list{display:grid;gap:8px;max-height:460px;overflow:auto}.vocab-library-card{border:1px solid var(--line);background:var(--surface);border-radius:8px;display:grid;grid-template-columns:minmax(0,1fr) 42px;align-items:center;gap:8px;min-height:72px;padding:8px;text-align:left;overflow:hidden}.vocab-library-main{border:0;background:transparent;padding:8px;display:flex;align-items:center;justify-content:space-between;gap:8px;min-width:0;width:100%;min-height:54px;text-align:left}.vocab-library-card span{display:grid;gap:4px;min-width:0}.vocab-library-card strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.vocab-library-card small{color:var(--ink-3);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.vocab-library-card em{color:var(--primary);background:var(--primary-soft);border-radius:8px;padding:4px 8px;font-size:12px;font-style:normal;font-weight:600;flex-shrink:0}.vocab-library-card.assigned{border-color:var(--ink-3);background:var(--bg-warm)}.vocab-library-card.assigned em{color:var(--green);background:var(--surface)}.vocab-library-delete{width:36px;height:36px;margin:0;border:1px solid var(--primary-soft);border-radius:8px;background:var(--surface);color:var(--bad);display:inline-grid;place-items:center;flex-shrink:0}.vocab-test-admin{display:grid;grid-template-columns:minmax(260px,.85fr) minmax(300px,1.15fr);gap:12px;margin:16px 0}.vocab-test-form,.vocab-test-list{border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:16px}.vocab-test-form{display:grid;gap:12px}.vocab-test-form label{display:grid;gap:8px;color:var(--ink-2);font-weight:600}.vocab-csv-upload{display:grid;gap:8px;border:1px solid var(--line);border-radius:8px;padding:12px;background:var(--surface);margin-bottom:12px}.vocab-test-row,.vocab-test-card{border:1px solid var(--line);border-radius:8px;padding:12px;display:flex;align-items:center;justify-content:space-between;gap:12px}.vocab-test-row p,.vocab-test-card p{color:var(--ink-3);margin:4px 0 0}.vocab-test-list,.vocab-test-cards,.answer-review-list{display:grid;gap:8px}.vocab-test-row-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}.vocab-mode-tabs{display:flex;gap:8px;margin-bottom:12px}.vocab-mode-tabs button{border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:8px 12px;font-weight:600}.vocab-mode-tabs button.active{color:var(--surface);border-color:var(--primary);background:var(--primary)}.test-answer-input{width:min(100%,520px);border:1px solid var(--line);border-radius:8px;padding:12px;font:inherit;text-align:center}.answer-review{border:1px solid var(--line);border-radius:8px;padding:12px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:4px;text-align:left}.answer-review div:first-child{display:grid;gap:4px}.answer-review.correct,.answer-review.needs_review,.answer-review.incorrect{border-color:var(--ink-3);background:var(--bg-warm)}.answer-review em{font-style:normal;font-weight:600;color:var(--ink-3)}.answer-review-actions{display:flex;gap:8px;flex-shrink:0}.answer-review-actions button{width:38px;height:38px;border-radius:8px;border:1px solid var(--line);background:var(--surface);font-size:16px;font-weight:600}.answer-review-actions .correct-btn{color:var(--ink-2);border-color:var(--ink-3)}.answer-review-actions .wrong-btn{color:var(--ink-3);border-color:var(--ink-3)}.wide-modal{width:min(100%,760px);max-width:760px;max-height:86vh;overflow:auto}.exercise-review-modal{width:min(100%,1120px);max-width:1120px}.exercise-review-modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;text-align:left;margin-bottom:12px}.exercise-review-modal-head h2{margin:4px 0 0}.exercise-result-summary-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;text-align:left}.exercise-result-summary-grid div{display:grid;gap:4px;border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:8px}.exercise-result-summary-grid small,.exercise-review-meta span{color:var(--ink-3);font-size:12px;font-weight:600}.exercise-review-list{display:grid;gap:8px;margin-top:12px;text-align:left}.exercise-review-card{display:grid;gap:12px;border:1px solid var(--line);border-radius:8px;padding:12px;background:var(--surface)}.exercise-review-card.correct{border-color:var(--ink-3)}.exercise-review-card.incorrect{border-color:var(--ink-3);background:var(--surface)}.exercise-review-title{display:grid;grid-template-columns:34px 1fr auto;gap:8px;align-items:start}.exercise-review-title>span{width:30px;height:30px;display:grid;place-items:center;border-radius:8px;background:var(--primary-soft);color:var(--primary-ink);font-weight:600}.exercise-review-title small{color:var(--ink-3);font-weight:600}.exercise-review-title strong{display:block;margin-top:4px;line-height:1.5}.exercise-review-title em{font-style:normal;font-weight:600;color:var(--ink-2)}.exercise-review-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:8px}.exercise-review-meta div{display:grid;gap:4px;border:1px solid var(--line-2);border-radius:8px;background:var(--bg);padding:8px}.exercise-review-meta b{font-weight:600;line-height:1.5;overflow-wrap:anywhere}.correct-text{color:var(--green)}.wrong-text{color:var(--bad)}.detail-card h1{margin-top:8px;font-size:24px}.detail-body{margin-top:24px;line-height:1.5;white-space:pre-wrap;color:var(--ink-2)}.file-head{margin-top:24px;padding-top:16px;border-top:1px solid var(--line-2)}.file-list{display:flex;flex-direction:column;gap:8px;margin-top:12px}.file-row{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:8px;padding:12px}.file-icon{width:46px;height:44px;border-radius:8px;display:grid;place-items:center;font-size:12px;font-weight:600;color:var(--primary);background:var(--primary-soft);flex-shrink:0}.file-info{min-width:0;flex:1}.file-name{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-size{color:var(--ink-3);font-size:12px;margin-top:4px}.download-btn{width:40px;height:40px;border:0;border-radius:8px;color:var(--surface);background:var(--primary)}.admin-login{min-height:100vh;display:grid;place-items:center;padding:16px;background:var(--bg-warm)}.student-login{min-height:100dvh;display:grid;place-items:center;padding:24px 16px;background:var(--bg-warm)}.student-login .login-card{width:min(100%,420px)}.student-login h1{font-size:24px}.login-copy{margin:12px 0 4px;color:var(--ink-2);font-size:14px;line-height:1.5}.login-hint{margin:0;color:var(--ink-3);font-size:12px;line-height:1.5}.login-card .remember-choice{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:500}.login-card .remember-choice input{width:18px;height:18px;margin:0;accent-color:var(--primary)}.admin-entry{text-align:center;font-size:12px;margin-top:4px}.pwa-install .text-btn{display:flex;align-items:center;justify-content:center;gap:4px;width:100%}.pwa-install a.text-btn{text-decoration:none}.pwa-install{margin-bottom:12px}.student-session-bar{max-width:760px;margin:0 auto;padding:16px clamp(16px,4vw,32px) 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}.student-session-bar strong{font-size:14px;overflow-wrap:anywhere}.student-session-bar button{display:inline-flex;align-items:center;gap:4px;padding:8px 12px;background:var(--surface);border:1px solid var(--line);border-radius:8px;color:var(--ink-2);font-size:12px}.session-error{max-width:680px;margin:16px auto;padding:0 16px;color:var(--bad)}.invite-card{margin-bottom:16px;padding:16px;border:1px solid var(--line);border-radius:8px;background:var(--surface)}.invite-card label{font-weight:600}.invite-card p{color:var(--ink-2);font-size:13px;line-height:1.5}.invite-link-row{display:flex;gap:8px;flex-wrap:wrap}.invite-link-row input{flex:1 1 220px;min-width:0;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);font-size:13px}.invite-card .invite-status{margin-bottom:0;color:var(--primary)}.login-card{display:flex;flex-direction:column;gap:12px}.login-card h1{margin:12px 0 0}.login-card label,.upload-card label{display:grid;gap:8px;color:var(--ink-2);font-weight:600}.admin-shell{min-height:100vh;display:grid;grid-template-columns:244px 1fr;background:var(--bg)}.admin-sidebar{border-right:1px solid var(--line);background:var(--surface);padding:24px 16px;display:flex;flex-direction:column;gap:8px;position:sticky;top:0;height:100vh}.admin-sidebar .brand{margin-bottom:16px}.admin-sidebar button{border:0;border-radius:8px;background:transparent;color:var(--ink-2);padding:12px;text-align:left;font-weight:600}.admin-sidebar button.active{color:var(--primary-ink);background:var(--primary-soft)}.admin-sidebar .logout{margin-top:auto;display:flex;align-items:center;gap:8px}.admin-main{padding:32px clamp(16px,4vw,32px);overflow:auto}.teacher-lessons{margin:16px 0}.teacher-lesson-upload{display:grid;grid-template-columns:minmax(180px,1fr) minmax(220px,1fr) auto;gap:8px;margin:12px 0}.teacher-lesson-upload input{min-width:0;width:100%}.teacher-lesson-list{display:grid;border:1px solid var(--line-2);border-radius:8px;overflow:hidden}.teacher-lesson-item{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px;background:var(--surface);border-bottom:1px solid var(--line-2)}.teacher-lesson-item:last-child{border-bottom:0}.teacher-lesson-item>div:first-child{display:grid;gap:4px;min-width:0}.teacher-lesson-item strong{overflow-wrap:anywhere}.teacher-lesson-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;background:var(--surface);display:grid;grid-template-rows:auto minmax(0,1fr)}.teacher-lesson-toolbar{display:flex;align-items:center;gap:12px;padding:8px 16px;border-bottom:1px solid var(--line-2);min-height:58px}.teacher-lesson-toolbar strong{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.teacher-lesson-toolbar button{display:inline-flex;align-items:center;gap:4px}.teacher-lesson-overlay iframe{display:block;width:100%;height:100%;border:0}@media(max-width:720px){.teacher-lesson-upload{grid-template-columns:1fr}.teacher-lesson-toolbar{gap:8px;padding:8px}}.admin-head{align-items:flex-end;margin-bottom:24px}.admin-jump-tabs{display:flex;flex-wrap:wrap;gap:8px;margin:-8px 0 16px;padding-bottom:4px}.admin-jump-tabs button{display:inline-flex;align-items:center;gap:4px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--primary);padding:8px 12px;font-weight:600}.primary-inline{display:inline-flex;align-items:center;gap:8px}.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:16px}.stats div{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:16px}.stats span{display:block;color:var(--ink-3);font-size:12px;font-weight:600;text-transform:uppercase}.stats strong{display:block;margin-top:4px;font-size:24px}.add-board{display:grid;grid-template-columns:1fr 1fr auto;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:12px;margin-bottom:16px}.add-board button{display:inline-flex;align-items:center;justify-content:center;gap:8px}.table-card{overflow-x:auto;background:var(--surface);border:1px solid var(--line);border-radius:8px}table{width:100%;border-collapse:collapse}th,td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line-2);white-space:nowrap}th{color:var(--ink-3);font-size:12px;text-transform:uppercase;background:var(--surface)}tr:last-child td{border-bottom:0}.mini-mono{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;margin-right:8px;font-weight:600}.board-link{border:0;background:transparent;padding:0;color:var(--ink);font-weight:600;display:inline-flex;align-items:center}.row-actions{display:flex;gap:8px;justify-content:flex-end}.row-actions button,.manager-actions button,.outline-icon{border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:8px;display:inline-flex;align-items:center;gap:4px}.row-actions .danger,.manager-actions .danger,.outline-icon.danger{color:var(--bad)}.manager-list{display:grid;gap:12px}.report-admin-grid,.vocab-admin-grid,.exercise-admin-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(280px,.8fr);gap:12px;margin-bottom:16px}.report-form,.vocab-upload-card,.vocab-admin-list{display:grid;gap:12px;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:16px}.report-form label,.vocab-upload-card label{display:grid;gap:8px;color:var(--ink-2);font-weight:600}.report-form textarea{min-height:82px;resize:vertical}.report-selects{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.section-title{display:flex;align-items:center;gap:8px;color:var(--primary-ink)}.report-admin-card{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.report-admin-card p{color:var(--ink-2);margin:4px 0 0;line-height:1.5}.small-empty{margin:0;padding:16px}.manager-item{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:16px}.manager-title-row{display:flex;justify-content:space-between;gap:16px;align-items:flex-start}.manager-title-row p{color:var(--ink-2);line-height:1.5;margin:8px 0 4px;white-space:pre-wrap}.manager-actions{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap;flex-shrink:0}.manager-edit{display:grid;gap:12px}.manager-edit label{display:grid;gap:8px;color:var(--ink-2);font-weight:600}.manager-edit textarea{min-height:120px;resize:vertical}.compact-toggle{padding:8px}.outline-icon{width:40px;height:40px;justify-content:center;flex-shrink:0}.upload-card{display:grid;gap:16px;max-width:760px;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:24px}.upload-card textarea{min-height:140px;resize:vertical}.toggle-line{display:flex!important;grid-template-columns:auto 1fr;flex-direction:row;align-items:center;gap:8px!important;padding:12px;border:1px solid var(--primary-soft);border-radius:8px;background:var(--notice-soft)}.toggle-line span{display:inline-flex;align-items:center;gap:8px}.drop-zone{border:2px dashed var(--ink-3);background:var(--primary-soft);border-radius:8px;padding:32px 16px;text-align:center;color:var(--primary-ink);place-items:center}.drop-zone input{display:none}.drop-zone span{color:var(--ink-3);font-weight:500}.chosen-files{display:grid;gap:8px}.chosen-files div{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:8px;padding:8px 12px}.chosen-files span{margin-left:auto;color:var(--ink-3);font-size:12px}.form-actions{display:flex;justify-content:flex-end}.exercise-list{display:grid;gap:12px}.exercise-card,.exercise-panel{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:16px}.exercise-card{display:flex;align-items:center;justify-content:space-between;gap:12px}.exercise-card p{color:var(--ink-2);margin:4px 0}.exercise-card span{color:var(--primary-ink);font-weight:600}.exercise-workspace{display:grid;gap:12px}.exercise-panel{display:grid;gap:16px}.exercise-paper{width:min(100%,940px);margin:0 auto;background:var(--surface);border:1px solid var(--ink-3);border-radius:8px;padding:24px;display:grid;gap:16px}.exercise-paper-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,.7fr);gap:16px;align-items:end;border-bottom:2px solid var(--ink);padding-bottom:12px}.exercise-paper-head p{margin:0 0 4px;color:var(--ink-3);font-weight:600}.exercise-paper-head h2{margin:0;font-size:24px}.exercise-paper-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;font-size:13px}.exercise-paper-meta span{border-bottom:1px solid var(--ink);min-height:28px;color:var(--ink-2);font-weight:600}.exercise-paper-summary{display:flex;flex-wrap:wrap;gap:8px}.exercise-paper-summary span{border:1px solid var(--line);border-radius:8px;padding:4px 8px;color:var(--ink-2);font-size:13px;font-weight:600}.exercise-retry-summary{display:flex;justify-content:space-between;gap:12px;align-items:center;border:1px solid var(--ink-3);border-radius:8px;background:var(--notice-soft);padding:12px}.exercise-retry-summary div{display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center}.exercise-retry-summary span{color:var(--ink-2);font-weight:600}.exercise-retry-box{display:grid;gap:12px;border:2px solid var(--primary);border-radius:8px;padding:12px;background:var(--primary-soft)}.exercise-retry-box>p{margin:0;color:var(--ink-2)}.retry-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.retry-actions{background:transparent;align-items:center;gap:8px;flex-wrap:wrap}.retry-message{font-weight:600;font-size:14px}.retry-message.success-text{color:var(--green)}.retry-message.error-text{color:var(--bad)}.exercise-question-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;align-items:start}.exercise-question-block{break-inside:avoid;page-break-inside:avoid;display:grid;gap:12px;border-top:1px solid var(--line);padding-top:12px}.exercise-question-title{display:grid;grid-template-columns:34px 1fr;gap:8px}.exercise-question-number{width:30px;height:30px;border:2px solid var(--ink);border-radius:8px;display:grid;place-items:center;font-weight:600}.exercise-question-title h3{margin:0;font-size:16px;line-height:1.5}.exercise-progress{display:flex;justify-content:space-between;color:var(--ink-2);font-weight:600}.exercise-panel h2,.exercise-panel h3{margin:0}.exercise-source{color:var(--ink-3);margin:0}.exercise-passage{border:1px solid var(--line-2);border-radius:8px;padding:12px;line-height:1.5;max-height:300px;overflow:auto;background:var(--surface);font-size:14px;display:flex;flex-direction:column}.exercise-passage.summary-passage{max-height:none;overflow:visible}.exercise-passage p{margin:0 0 8px}.exercise-passage .under{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px;font-weight:600}.exercise-passage .given-box{border:1px solid var(--ink-3);border-radius:8px;background:var(--primary-soft);color:var(--primary-ink);padding:12px;margin-bottom:12px;font-weight:600;line-height:1.5}.exercise-passage .given-box:before{content:"주어진 문장";display:inline-flex;margin:0 0 8px;border-radius:8px;background:var(--surface);color:var(--primary);padding:4px 8px;font-size:12px;font-weight:600}.exercise-passage .inline-marker,.exercise-passage .sent-marker{display:inline-grid;place-items:center;min-width:24px;height:24px;margin:0 4px;border-radius:8px;background:var(--surface);border:1px solid var(--primary);color:var(--primary-ink);font-weight:600}.exercise-passage .blank{display:inline-block;min-width:120px;border-bottom:2px solid var(--ink);transform:translateY(2px)}.exercise-passage .summary-box{order:-1;border:1px solid var(--ink-3);border-radius:8px;background:var(--notice-soft);color:var(--notice);padding:12px;margin:0 0 12px;font-weight:600;line-height:1.5}.exercise-passage .summary-box:before{content:"요약문";display:inline-flex;margin:0 0 8px;border-radius:8px;background:var(--surface);color:var(--notice);padding:4px 8px;font-size:12px;font-weight:600}.exercise-passage .summary-box .blank{min-width:74px;border-bottom-color:var(--notice)}.exercise-passage .vocab{font-weight:600;color:var(--primary-ink)}.exercise-choices{display:grid;gap:8px}.exercise-choice{display:grid;grid-template-columns:28px 1fr;align-items:center;gap:8px;border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:8px;text-align:left}.exercise-choice span{width:24px;height:24px;display:grid;place-items:center;border-radius:8px;background:var(--primary-soft);color:var(--primary-ink);font-weight:600}.exercise-choice em{font-style:normal;line-height:1.5;font-size:14px}.exercise-choice.selected{border-color:var(--primary)}.exercise-choice.correct,.exercise-choice.wrong{border-color:var(--ink-3);background:var(--bg-warm)}.exercise-result-note{border-radius:8px;padding:12px;display:grid;gap:4px}.exercise-result-note.correct,.exercise-result-note.wrong{background:var(--bg-warm)}.exercise-result-note p{margin:0;color:var(--ink-2)}.exercise-actions{display:flex;justify-content:flex-end;gap:8px}.exercise-paper-actions{position:sticky;bottom:12px;display:flex;justify-content:flex-end;padding-top:12px;border-top:1px solid var(--line);background:var(--surface)}.exercise-result-summary{display:flex;justify-content:space-between;gap:12px;padding:12px;border:1px solid var(--line);border-radius:8px}@media print{body{background:var(--surface)}.student-header,.back-btn,.tab-row,.exercise-paper-actions{display:none!important}.student-shell,.student-shell.narrow{max-width:none;padding:0}.exercise-paper{width:210mm;min-height:297mm;border:0;border-radius:0;padding:14mm}.exercise-question-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:760px){.student-shell{padding-top:16px}.hero{padding:32px 0 16px}.hero h1{font-size:24px}.board-grid{grid-template-columns:1fr}.board-card{min-height:126px}.admin-shell{display:block}.add-board{grid-template-columns:1fr}.admin-head{align-items:flex-start;flex-direction:column}.row-actions{justify-content:flex-start;flex-wrap:wrap}.report-checks,.report-admin-grid,.report-selects,.vocab-admin-grid,.exercise-admin-grid,.vocab-test-admin{grid-template-columns:1fr}.exercise-card{align-items:stretch;flex-direction:column}.exercise-card button{width:100%}.exercise-paper{padding:16px;border-radius:8px}.exercise-paper-head,.exercise-paper-meta,.exercise-question-grid,.retry-grid{grid-template-columns:1fr}.exercise-retry-summary{align-items:stretch;flex-direction:column}.exercise-retry-summary button{width:100%}.exercise-result-summary-grid,.exercise-review-meta{grid-template-columns:1fr}.exercise-review-title{grid-template-columns:30px 1fr}.exercise-review-title em{grid-column:2;justify-self:start}.exercise-choice{grid-template-columns:28px 1fr}.vocab-toolbar{align-items:stretch;flex-direction:column}.vocab-toolbar select{max-width:none}.vocab-test-row,.vocab-test-card{align-items:stretch;flex-direction:column}.vocab-test-row button,.vocab-test-card button{width:100%}.test-taking-card h2{font-size:24px}.manager-title-row{flex-direction:column}.manager-actions{justify-content:flex-start}}@media screen{.admin-shell{grid-template-columns:244px minmax(0,1fr)}.admin-main,.student-shell,.vocab-card,.exercise-question,.exercise-choice em,.report-admin-grid>*,.vocab-admin-grid>*,.exercise-admin-grid>*,.vocab-test-admin>*{min-width:0}.tab-row{overflow-x:auto;padding-bottom:4px}.tab-row button{flex:0 0 auto;white-space:nowrap}.vocab-mode-tabs,.manager-actions,.form-actions,.exercise-actions,.exercise-paper-actions{flex-wrap:wrap;gap:8px}.vocab-card h2,.exercise-passage,.exercise-choice em,.exercise-paper-head h2,.manager-title-row h1{overflow-wrap:anywhere}.board-head>div{min-width:0}.board-head .mono{flex-shrink:0}.board-head h1,.exercise-paper-head h2{word-break:keep-all;overflow-wrap:anywhere}.vocab-actions{flex-wrap:wrap}.student-login{min-height:100dvh}.student-shell{padding-bottom:max(24px,env(safe-area-inset-bottom))}.exercise-paper-actions{bottom:max(12px,env(safe-area-inset-bottom))}}@media screen and (min-width:768px){.student-shell.narrow,.student-session-bar{max-width:1000px}}@media screen and (max-width:1100px){.admin-shell{display:block}.admin-sidebar{position:static;height:auto;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));padding:16px;gap:8px;border-bottom:1px solid var(--line)}.admin-sidebar .brand{grid-column:1 / -1;min-width:0;margin:0 0 4px}.admin-sidebar button{min-width:0;min-height:44px;padding:8px 4px;justify-content:center;white-space:nowrap}.admin-sidebar .logout{margin:0}.stats{grid-template-columns:repeat(2,minmax(0,1fr))}.stats strong{font-size:24px;overflow-wrap:anywhere}}@media screen and (max-width:900px){.report-admin-grid,.vocab-admin-grid,.exercise-admin-grid,.vocab-test-admin,.exercise-paper-head,.exercise-question-grid{grid-template-columns:1fr}}@media screen and (max-width:600px){.admin-main{padding:24px 16px}.student-header h1,.admin-head h1{overflow-wrap:anywhere}.vocab-card h2{font-size:24px}.modal-scrim{padding:12px}.modal-card,.wide-modal{max-width:100%;max-height:calc(100dvh - 24px);overflow-y:auto}.exercise-review-modal-head{flex-wrap:wrap}.exercise-paper-meta{grid-template-columns:1fr}.invite-link-row button{width:100%;justify-content:center}}@media screen and (pointer:coarse){input:not([type=checkbox]):not([type=radio]),select,textarea{font-size:16px}button,.pwa-install-button,.download-btn{min-height:44px}.outline-icon{min-width:44px}}