:root{color:#1f2933;background:#f6f7f4;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}a{color:inherit}.app-shell,.shell{width:min(100%,1120px);margin:0 auto;padding:32px}.app-shell{--paper: #fffdf7;--paper-muted: #f4f0e6;--paper-strong: #ece4d4;--ink: #1e252b;--ink-soft: #59636f;--ink-faint: #7b8794;--field: #123f34;--field-soft: #e4f0e7;--field-line: #9dbba7;--amber: #b66b16;--amber-soft: #fff3dd;--blueprint: #234c6f;--rule: #d7ccba;--shadow: 0 16px 44px rgba(48, 39, 22, .1);--shadow-soft: 0 8px 22px rgba(48, 39, 22, .075);color:var(--ink);font-family:Pretendard Variable,Pretendard,Noto Sans KR,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.shell{display:grid;min-height:100vh;place-items:center}.hero{width:min(100%,720px)}.top-nav{display:flex;gap:16px;align-items:center;justify-content:space-between;margin-bottom:56px;padding:12px;border:1px solid rgba(18,63,52,.16);border-radius:14px;background:#fffdf7db;box-shadow:var(--shadow-soft);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.nav-brand,.nav-link,.text-link{min-height:36px;color:#1f6b4f;font-weight:700;text-decoration:none}.card-action{display:inline-flex;min-width:96px;align-items:center;justify-content:center;justify-self:center;padding:0 16px;border:1px solid rgba(18,63,52,.2);border-radius:6px;background:var(--paper);box-shadow:inset 0 -2px #123f3414;transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}.nav-brand,.nav-link{display:inline-flex;align-items:center;white-space:nowrap}.nav-brand{gap:2px;min-height:40px;color:var(--field);font-size:1.05rem;font-weight:800;padding:0 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strong{color:#0f3326;font-size:1.12em;font-weight:950}.home-title,.home-lead{max-width:none;white-space:nowrap}h1{margin:0;color:var(--ink);font-size:clamp(2.25rem,4rem,4rem);line-height:1.05;letter-spacing:0}.lead{max-width:38rem;margin:24px 0 0;color:var(--ink-soft);font-size:1.125rem;line-height:1.7}.backup-lead{max-width:none;white-space:nowrap}.muted{margin:0;color:var(--ink-faint);line-height:1.6}.primary-link,.primary-button,.secondary-button,.secondary-link{display:inline-flex;min-height:44px;align-items:center;justify-content:center;font:inherit;cursor:pointer;text-decoration:none}.primary-link,.primary-button{margin-top:32px;padding:0 18px;border:1px solid #0b2f28;border-radius:6px;background:linear-gradient(180deg,#1f6b4f,#123f34);box-shadow:0 8px 18px #123f343d;color:#fff;font-weight:700;transition:transform .16s ease,box-shadow .16s ease,filter .16s ease}.primary-button{margin-top:0}.secondary-button,.secondary-link{padding:0 16px;border:1px solid var(--rule);border-radius:6px;background:var(--paper);color:var(--ink);font-weight:700;box-shadow:inset 0 -2px #30271612;transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}.danger-button{border-color:#d6a28a;background:#fff7ed;color:#9a3412}.primary-link:hover,.primary-button:hover:not(:disabled),.secondary-button:hover:not(:disabled),.secondary-link:hover,.card-action:hover{transform:translateY(-1px)}.primary-link:hover,.primary-button:hover:not(:disabled){box-shadow:0 12px 26px #123f344d;filter:saturate(1.04)}.secondary-button:hover:not(:disabled),.secondary-link:hover,.card-action:hover{border-color:var(--field-line);box-shadow:inset 0 -2px #123f3417,0 8px 18px #30271614}.primary-button:disabled,.secondary-button:disabled{cursor:not-allowed;opacity:.55}.primary-link:focus-visible,.primary-button:focus-visible,.secondary-button:focus-visible,.secondary-link:focus-visible,.nav-brand:focus-visible,.nav-link:focus-visible,.text-link:focus-visible,.check-row:focus-within,.choice-row:focus-within,.question-map-item:focus-visible{outline:3px solid #9ecab0;outline-offset:3px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}.subject-grid{grid-template-columns:repeat(auto-fit,minmax(240px,320px))}.stack{display:grid;gap:16px}.card,.panel{border:1px solid var(--rule);border-radius:8px;background:var(--paper);box-shadow:var(--shadow-soft)}.card{position:relative;display:grid;gap:20px;align-content:start;min-height:220px;padding:20px;overflow:hidden;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.card[hidden]{display:none}.subject-card{grid-template-rows:auto 1fr auto;align-content:stretch}.semester-filter{display:inline-grid;grid-template-columns:repeat(3,minmax(76px,1fr));gap:0;margin:0 0 18px;overflow:hidden;border:1px solid var(--rule);border-radius:8px;background:var(--paper)}.semester-filter label{min-width:0}.semester-filter input{position:absolute;opacity:0;pointer-events:none}.semester-filter span{display:grid;min-height:40px;place-items:center;padding:0 14px;color:var(--ink-soft);font-weight:800;white-space:nowrap;cursor:pointer}.semester-filter label+label span{border-left:1px solid var(--rule)}.semester-filter input:checked+span{background:var(--field);color:#fff}.semester-filter input:focus-visible+span{outline:3px solid rgba(217,171,85,.45);outline-offset:-3px}.semester-badge{margin-bottom:10px}.subject-card .card-action{align-self:end}.card:before{content:"";position:absolute;inset:0 auto 0 0;width:5px;background:var(--field)}.card:nth-child(2n):before{background:var(--blueprint)}.card:nth-child(3n):before{background:var(--amber)}.card:hover{transform:translateY(-3px);border-color:#123f3447;box-shadow:var(--shadow)}.panel{padding:20px}.card h2,.panel h2{margin:0 0 8px;color:var(--ink);font-size:1.125rem;letter-spacing:0}.compact-list{display:grid;gap:8px;margin:0;padding-left:18px;color:var(--ink-soft);line-height:1.5}.compact-list li::marker{color:var(--field)}.check-list{display:grid;gap:10px;margin-top:16px}.filter-bar{display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px}.history-toolbar .filter-bar{margin-bottom:0}.filter-bar label{display:grid;gap:6px;min-width:180px;color:#43515f;font-weight:700}.filter-bar select{min-height:40px;padding:0 10px;border:1px solid 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.history-item-summary:after{content:"접기"}.history-item-body{display:grid;gap:18px;margin-top:18px;padding-top:18px;border-top:1px solid #e2e7e2}.history-item-header{display:flex;gap:12px;align-items:start;justify-content:space-between}.history-badges{display:flex;flex-wrap:wrap;gap:8px;justify-content:flex-end}.history-badge{color:#1f6b4f}.history-badge.is-wrong{border-color:#f3c99a;background:#fff7ed;color:#9a3412}.settings-grid{display:grid;gap:16px;margin-top:16px}.subject-switcher{display:grid;grid-template-columns:minmax(260px,360px) 1fr;gap:20px;align-items:end;margin:0 0 16px}.subject-switcher label{display:grid;gap:6px;color:#43515f;font-weight:800}.subject-switcher select{min-height:42px;padding:0 10px;border:1px solid var(--rule);border-radius:6px;background:var(--paper);color:var(--ink);font:inherit}.subject-summary{display:grid;grid-template-columns:repeat(4,minmax(80px,1fr));gap:10px;margin:0}.subject-summary div{padding:12px;border:1px solid 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var(--field-line);border-radius:8px;background:var(--paper);color:var(--ink-soft);box-shadow:var(--shadow-soft)}.empty-state-card.compact{padding:16px;box-shadow:none}.empty-state-card strong{color:var(--ink)}.empty-state-card p{margin:0;line-height:1.6}.empty-state-card .primary-link{justify-self:start;margin-top:8px}.segmented-field{min-width:0;margin:0;padding:18px;border:1px solid var(--rule);border-radius:8px;background:var(--paper);box-shadow:var(--shadow-soft)}.segmented-field legend{padding:0 4px;color:var(--field);font-weight:800}.source-field{padding-top:12px}.source-search{display:grid;gap:8px;margin-top:10px;color:var(--ink-soft);font-weight:800}.source-search input{width:100%;min-height:42px;padding:0 12px;border:1px solid var(--rule);border-radius:6px;background:#fff;color:var(--ink);font:inherit}.source-count{display:inline-block;margin-left:4px;color:var(--ink-soft);font-size:.92em;font-weight:800;white-space:nowrap}.segmented-control{display:grid;grid-template-columns:1fr 1fr;gap:0;overflow:hidden;margin-top:10px;border:1px solid var(--rule);border-radius:6px;background:var(--paper)}.segmented-control.three{grid-template-columns:repeat(3,1fr)}.segmented-control label{min-width:0}.segmented-control input{position:absolute;opacity:0;pointer-events:none}.segmented-control span{display:flex;min-height:42px;align-items:center;justify-content:center;padding:0 10px;color:var(--ink-soft);font-weight:800;text-align:center}.segmented-control label+label span{border-left:1px solid var(--rule)}.segmented-control input:checked+span{background:var(--field);color:#fff}.segmented-control input:focus-visible+span{outline:3px solid #9fd5be;outline-offset:-3px}.check-row{position:relative;display:grid;grid-template-columns:20px 1fr;gap:12px;align-items:start;min-height:48px;padding:12px;border:1px solid rgba(18,63,52,.12);border-radius:6px;background:#fffaf0;transition:background .16s ease,border-color .16s ease,box-shadow .16s ease}.check-row:hover{border-color:var(--field-line);background:#fff}.check-row:has(input:checked){border-color:var(--field);background:var(--field-soft);box-shadow:inset 4px 0 0 var(--field)}.check-row input{width:18px;height:18px;margin:2px 0 0}.check-row small{display:block;margin-top:4px;color:var(--ink-faint)}.check-row[hidden]{display:none}.selection-summary{display:grid;gap:12px;margin-top:16px}.selection-summary>div:first-child,.result-report-header{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}.selection-summary>div:first-child>div,.result-report-header>div{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.selected-chip-list{display:flex;flex-wrap:wrap;gap:8px}.selected-chip{display:inline-flex;min-height:34px;align-items:center;gap:8px;padding:0 10px;border:1px solid rgba(18,63,52,.16);border-radius:999px;background:var(--field-soft);color:var(--field);font-weight:800}.selected-chip small{color:var(--ink-soft);font-weight:800}.empty-state-inline{color:var(--ink-faint);font-weight:800}.status-badge{display:inline-flex;min-height:28px;align-items:center;justify-content:center;padding:0 9px;border:1px solid #d8dfd8;border-radius:999px;background:#fbfcfa;color:#43515f;font-size:.82rem;font-weight:900;white-space:nowrap}.status-badge.is-correct{border-color:var(--field-line);background:var(--field-soft);color:var(--field)}.status-badge.source-kind{min-height:24px;padding-inline:8px;font-size:.78rem}.status-badge.source-kind-exam{border-color:var(--field-line);background:var(--field-soft);color:var(--field)}.status-badge.source-kind-material{border-color:#9db6cb;background:#eef5fb;color:var(--blueprint)}.status-badge.source-kind-lecture{border-color:#e2b26f;background:var(--amber-soft);color:#8a4b0f}.status-badge.is-wrong{border-color:#f3c99a;background:#fff7ed;color:#9a3412}.status-badge.is-unanswered{border-color:#d2dbd3;background:#f8faf7;color:#667483}.action-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-start;margin-top:24px}.action-row.split{justify-content:space-between}.start-panel{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;margin-top:24px;padding:22px;border:1px solid var(--field-line);border-radius:8px;background:linear-gradient(90deg,rgba(18,63,52,.08),transparent 46%),var(--paper);box-shadow:var(--shadow-soft)}.start-panel strong{color:var(--ink)}.start-panel .form-message{margin-top:8px}.start-panel .primary-button{min-width:180px;min-height:52px;font-size:1.05rem}.form-message{min-height:24px;margin:16px 0 0;color:#9a3412;font-weight:700}.quiz-header{display:flex;gap:16px;align-items:end;justify-content:space-between;margin-bottom:24px}.quiz-progress-panel{min-width:min(100%,420px)}.quiz-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:flex-end}.quiz-option-summary{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:flex-end;margin:0 0 2px}.quiz-option-summary div{display:flex;gap:8px;align-items:center;padding:10px 12px;border:1px solid var(--rule);border-radius:6px;background:var(--paper)}.quiz-option-summary dt{color:var(--ink-faint);font-size:.8rem;font-weight:800;white-space:nowrap}.quiz-option-summary dd{margin:0;color:var(--ink);font-weight:900}.quiz-header h1{font-size:2rem}.progress-track{width:100%;max-width:420px;height:10px;overflow:hidden;margin-top:14px;border-radius:999px;background:var(--paper-strong)}.progress-track span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--field),#2f7d5b)}.progress-summary{margin-top:10px;font-size:.95rem}.question-map{display:grid;gap:14px;margin:0 0 24px;padding:16px;border:1px solid var(--rule);border-radius:8px;background:var(--paper);box-shadow:var(--shadow-soft)}.collapsible-map summary{cursor:pointer;color:var(--field);font-weight:900;list-style:none}.collapsible-map summary::-webkit-details-marker{display:none}.collapsible-map summary:after{content:"접기";margin-left:10px;color:var(--ink-faint);font-size:.86rem}.collapsible-map:not([open]) summary:after{content:"펼치기"}.question-map-header{display:flex;gap:12px;align-items:center;justify-content:space-between}.text-button{min-height:34px;padding:0;border:0;background:transparent;color:var(--field);font:inherit;font-weight:900;cursor:pointer}.text-button:focus-visible{border-radius:4px;outline:3px solid #9fd5be;outline-offset:3px}.question-map-grid{display:grid;grid-template-columns:repeat(auto-fill,34px);gap:8px;overflow-x:auto;padding:2px}.quiz-map .question-map-grid,.result-map .question-map-grid{grid-template-columns:repeat(26,32px);gap:6px}.question-map-item{position:relative;display:grid;width:34px;min-height:34px;place-items:center;padding:0;border:1px solid var(--rule);border-radius:8px;background:#fffaf0;color:var(--ink-soft);font:inherit;font-weight:800;cursor:pointer}.quiz-map .question-map-item{width:32px;min-height:32px;border-radius:7px;font-size:.95rem}.question-map-item.is-current{border-color:var(--field);box-shadow:inset 0 0 0 2px var(--field);color:var(--field)}.question-map-item.is-answered{border-color:var(--field-line);background:var(--field-soft);color:var(--field)}.question-map-item.is-checked{border-color:var(--field);background:var(--field);color:#fff}.result-map-item{text-decoration:none}.result-map-item.is-correct{border-color:var(--field);background:var(--field-soft);color:var(--field)}.result-map-item.is-incorrect{border-color:#b45309;background:#fff7ed;color:#7c2d12}.result-map-item.is-unanswered{border-color:#d2dbd3;background:#f8faf7;color:#667483}.result-map-item.is-current{box-shadow:inset 0 0 0 2px currentColor}.question-map-item.is-bookmarked small{position:absolute;top:-7px;right:-5px;display:grid;width:18px;height:18px;place-items:center;border:1px solid #b45309;border-radius:999px;background:#fff7ed;color:#b45309;font-size:.72rem;line-height:1}.question-map-legend{display:flex;flex-wrap:wrap;gap:10px 14px;color:var(--ink-faint);font-size:.875rem}.question-map-legend span{display:inline-flex;align-items:center;gap:6px}.question-map-legend i{display:inline-block;width:12px;height:12px;border:1px solid #d2dbd3;border-radius:3px;background:#f8faf7}.question-map-legend .legend-current{border-color:#1f6b4f;box-shadow:inset 0 0 0 2px #1f6b4f}.question-map-legend .legend-answered{border-color:#92bca9;background:#edf8f2}.question-map-legend .legend-checked{border-color:#1f6b4f;background:#1f6b4f}.question-map-legend .legend-bookmarked{border-color:#b45309;border-radius:999px;background:#fff7ed}.question-map-legend .legend-correct{border-color:#1f6b4f;background:#edf8f2}.question-map-legend .legend-incorrect{border-color:#b45309;background:#fff7ed}.question-map-legend .legend-unanswered{border-color:#d2dbd3;background:#f8faf7}.result-report,.result-source-set{display:grid;gap:16px;margin-bottom:18px}.result-report-header strong{font-size:1.05rem}.result-percent-bar{width:100%;height:14px;overflow:hidden;border-radius:999px;background:var(--paper-strong)}.result-percent-bar span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--field),#2f7d5b)}.result-metrics{display:flex;flex-wrap:wrap;gap:8px}.source-stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px}.source-stat-card{display:flex;gap:12px;align-items:center;justify-content:space-between;min-width:0;padding:12px;border:1px solid rgba(18,63,52,.14);border-radius:6px;background:var(--paper-muted)}.source-stat-card strong,.source-stat-card small{display:block;min-width:0}.source-stat-card small{margin-top:4px;color:var(--ink-faint)}.source-stat-meta{flex:0 0 auto;text-align:right}.source-stat-meta span{color:var(--field);font-size:1.4rem;font-weight:900}.question-card{position:relative;display:grid;gap:20px;padding:28px;border:1px solid var(--rule);border-radius:8px;background:var(--paper);box-shadow:var(--shadow)}.question-card:before{content:"";position:absolute;inset:0 0 auto;height:4px;border-radius:8px 8px 0 0;background:linear-gradient(90deg,var(--field),var(--blueprint),var(--amber))}.question-prompt{margin:0;color:var(--ink);font-size:1.25rem;font-weight:700;line-height:1.6}.question-card-tools{display:flex;justify-content:flex-end;margin-top:-6px}.bookmark-button{gap:8px;min-width:112px;border-color:#e5c983;background:#fff9e8;color:#9b6416}.bookmark-button:hover:not(:disabled){border-color:#d4a843;box-shadow:inset 0 -2px #d4a84329,0 8px 18px #9161181a}.bookmark-button.is-bookmarked{border-color:#e8952e;background:#fff1d6;color:#bf6516}.bookmark-button-icon{width:18px;height:22px;flex:0 0 auto;stroke:currentColor;stroke-width:2;stroke-linejoin:round}.quiz-navigation-row{display:grid;grid-template-columns:minmax(112px,1fr) auto minmax(112px,1fr);gap:10px;align-items:center}.quiz-navigation-row 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small{justify-self:start}}:root{--exam-topbar-bg: #3b3b3b;--exam-topbar-text: #ffffff;--exam-topbar-height: 44px;--exam-exit-bg: #4a9a8f;--exam-exit-text: #ffffff;--exam-exit-border: #3d8379;--exam-exit-hover-bg: #3d8379;--exam-timer-text: #ffffff;--exam-timer-warning: #e53e3e;--exam-tab-bg: #2d7d77;--exam-tab-border: #1f5e59;--exam-tab-active-bg: #ffffff;--exam-tab-active-border: #ffffff;--exam-tab-active-text: #1a5e5a;--exam-tab-inactive-text: #f0f0f0;--exam-tab-height: 48px;--exam-question-bg: #ffffff;--exam-question-text: #1a1a1a;--exam-choice-selected-bg: #e8f4fd;--exam-bookmark-inactive: #d4a843;--exam-bookmark-active: #e8952e;--exam-nav-arrow-color: #b0b0b0;--exam-nav-arrow-hover: #666666;--exam-sidebar-bg: #b8b8b8;--exam-sidebar-width: 280px;--exam-sidebar-border: #a0a0a0;--exam-info-bg: #d0d0d0;--exam-info-text: #222222;--exam-grid-bg: #ffffff;--exam-grid-border: #999999;--exam-grid-number-bg: #d8d8d8;--exam-grid-answer-color: #0066cc;--exam-grid-bookmark-color: #e8952e;--exam-grid-cell-height: 32px;--exam-modal-overlay: rgba(0, 0, 0, .5);--exam-modal-bg: #ffffff;--exam-modal-shadow: 0 4px 12px rgba(0, 0, 0, .3);--exam-modal-confirm-border: #e8952e;--exam-font-size: 16px}.exam-shell{display:flex;flex-direction:column;height:100vh;overflow:hidden;font-size:var(--exam-font-size);background:#f0f0f0}.exam-body{display:flex;flex:1;overflow:hidden;margin-top:var(--exam-topbar-height)}.exam-main{flex:1;min-width:0;display:flex;flex-direction:column;padding-top:var(--exam-tab-height);overflow:hidden;position:relative}.exam-question-wrapper{flex:1;display:flex;overflow:hidden;min-width:0}.exam-question-area{flex:1;overflow-y:auto;overflow-x:hidden;padding:24px 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