@import"https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Noto+Sans+KR:wght@400;500;600;700;900&display=swap";:root{--bg-deep:#0A1220;--bg-panel:#0F1B2E;--bg-panel-2:#132540;--line:#1E3252;--line-soft:#16273F;--text-hi:#E9EFF7;--text-mid:#9FB2CC;--text-dim:#5E7492;--amber:#F0A93A;--amber-dim:#8A6423;--teal:#34D8B0;--teal-dim:#123E36;--coral:#F76B6B;--coral-dim:#4A1E24;--grid-line: rgba(240,169,58,.04)}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;height:100%}body{background:linear-gradient(var(--grid-line) 1px,transparent 1px) 0 0/100% 28px,linear-gradient(90deg,var(--grid-line) 1px,transparent 1px) 0 0/28px 100%,var(--bg-deep);color:var(--text-hi);font-family:Noto Sans KR,-apple-system,sans-serif;height:100%;overflow:hidden}.mono{font-family:IBM Plex Mono,monospace}.app{display:flex;height:100%}.sidebar{width:272px;min-width:272px;background:var(--bg-panel);border-right:1px solid var(--line);display:flex;flex-direction:column;height:100%}.sidebar-header{padding:20px 18px 14px;border-bottom:1px solid var(--line-soft)}.brand{display:flex;align-items:baseline;gap:8px;margin-bottom:14px}.brand-mark{font-family:IBM Plex Mono,monospace;font-weight:700;font-size:13px;letter-spacing:.08em;color:var(--amber);border:1px solid var(--amber-dim);padding:3px 7px;border-radius:3px;background:#f0a93a14}.brand-title{font-size:13px;color:var(--text-dim);font-family:IBM Plex Mono,monospace;letter-spacing:.02em}.search-box{position:relative}.search-box input{width:100%;background:var(--bg-deep);border:1px solid var(--line);border-radius:6px;color:var(--text-hi);padding:9px 12px 9px 32px;font-size:13px;font-family:IBM Plex Mono,monospace;outline:none;transition:border-color .15s}.search-box input:focus{border-color:var(--amber-dim)}.search-box input::placeholder{color:var(--text-dim)}.search-icon{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--text-dim);font-size:13px;pointer-events:none}.sidebar-stats{display:flex;justify-content:space-between;font-family:IBM Plex Mono,monospace;font-size:11px;color:var(--text-dim);margin-top:10px;padding:0 1px}.sidebar-stats b{color:var(--teal);font-weight:600}.q-list{flex:1;overflow-y:auto;padding:8px}.q-list::-webkit-scrollbar{width:8px}.q-list::-webkit-scrollbar-thumb{background:var(--line);border-radius:4px}.q-list::-webkit-scrollbar-track{background:transparent}.q-item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:6px;cursor:pointer;font-family:IBM Plex Mono,monospace;font-size:12.5px;color:var(--text-mid);border:1px solid transparent;margin-bottom:2px;transition:background .1s,border-color .1s}.q-item:hover{background:var(--bg-panel-2)}.q-item.active{background:#f0a93a1a;border-color:var(--amber-dim);color:var(--text-hi)}.q-item .qnum{width:48px;color:var(--text-dim);flex-shrink:0}.q-item.active .qnum{color:var(--amber)}.q-item .qsnippet{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:Noto Sans KR,sans-serif;font-size:12px;color:var(--text-dim)}.q-item .status-dot{width:6px;height:6px;border-radius:50%;flex-shrink:0;background:var(--line)}.q-item .status-dot.correct{background:var(--teal)}.q-item .status-dot.wrong{background:var(--coral)}.no-results{padding:24px 12px;text-align:center;color:var(--text-dim);font-size:12.5px;font-family:IBM Plex Mono,monospace}.main{flex:1;display:flex;flex-direction:column;height:100%;overflow:hidden}.topbar{display:flex;align-items:center;justify-content:space-between;padding:16px 32px;border-bottom:1px solid var(--line-soft);background:var(--bg-panel)}.topbar-left{display:flex;align-items:center;gap:14px}.qid-badge{font-family:IBM Plex Mono,monospace;font-weight:700;font-size:20px;color:var(--amber)}.topbar-sub{font-family:IBM Plex Mono,monospace;font-size:11.5px;color:var(--text-dim)}.btn{font-family:IBM Plex Mono,monospace;font-size:12.5px;font-weight:600;padding:9px 16px;border-radius:6px;border:1px solid var(--line);background:var(--bg-panel-2);color:var(--text-hi);cursor:pointer;display:flex;align-items:center;gap:7px;transition:border-color .15s,transform .1s}.btn:hover{border-color:var(--amber-dim)}.btn:active{transform:scale(.97)}.btn-shuffle{background:linear-gradient(135deg,#f0a93a29,#f0a93a0d);border-color:var(--amber-dim);color:var(--amber)}.btn-shuffle:hover{border-color:var(--amber)}.btn-nav{padding:9px 12px}.btn:disabled{opacity:.35;cursor:not-allowed}.content-scroll{flex:1;overflow-y:auto;padding:36px 0 80px;display:flex;justify-content:center}.content-scroll::-webkit-scrollbar{width:10px}.content-scroll::-webkit-scrollbar-thumb{background:var(--line);border-radius:5px}.content-scroll::-webkit-scrollbar-track{background:transparent}.question-card{width:100%;max-width:760px;padding:0 32px}.multi-tag{display:inline-block;font-family:IBM Plex Mono,monospace;font-size:11px;font-weight:600;color:var(--teal);background:var(--teal-dim);border:1px solid rgba(52,216,176,.3);padding:4px 9px;border-radius:4px;margin-bottom:16px;letter-spacing:.03em}.question-text{font-size:17px;line-height:1.75;color:var(--text-hi);margin-bottom:28px;white-space:pre-wrap}.options{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}.option{display:flex;align-items:flex-start;gap:14px;padding:15px 18px;border-radius:9px;border:1.5px solid var(--line);background:var(--bg-panel);cursor:pointer;text-align:left;transition:border-color .12s,background .12s}.option:hover:not(.locked){border-color:var(--amber-dim);background:var(--bg-panel-2)}.option-letter{font-family:IBM Plex Mono,monospace;font-weight:700;font-size:13px;color:var(--text-mid);width:26px;height:26px;flex-shrink:0;border-radius:6px;border:1.5px solid var(--line);display:flex;align-items:center;justify-content:center}.option-text{font-size:14.5px;line-height:1.6;color:var(--text-mid);padding-top:2px;white-space:pre-wrap}.option.selected-pending{border-color:var(--amber);background:#f0a93a0f}.option.selected-pending .option-letter{border-color:var(--amber);color:var(--amber);background:#f0a93a1f}.option.correct{border-color:var(--teal);background:#34d8b014}.option.correct .option-letter{border-color:var(--teal);background:var(--teal);color:#08211b}.option.correct .option-text{color:var(--text-hi)}.option.incorrect{border-color:var(--coral);background:#f76b6b12}.option.incorrect .option-letter{border-color:var(--coral);background:var(--coral);color:#3a0e0e}.option.incorrect .option-text{color:var(--text-hi)}.option.locked{cursor:default}.option.locked:not(.correct):not(.incorrect){opacity:.55}.submit-row{margin-bottom:24px}.submit-btn{font-family:IBM Plex Mono,monospace;font-weight:700;font-size:13px;padding:11px 22px;border-radius:7px;border:1.5px solid var(--amber-dim);background:#f0a93a1f;color:var(--amber);cursor:pointer}.submit-btn:hover{background:#f0a93a33}.submit-btn:disabled{opacity:.3;cursor:not-allowed}.select-hint{font-family:IBM Plex Mono,monospace;font-size:11.5px;color:var(--text-dim);margin-bottom:12px}.result-banner{display:flex;align-items:center;gap:10px;padding:13px 18px;border-radius:8px;font-weight:600;font-size:14px;margin-bottom:20px;font-family:IBM Plex Mono,monospace}.result-banner.ok{background:var(--teal-dim);color:var(--teal);border:1px solid rgba(52,216,176,.35)}.result-banner.no{background:var(--coral-dim);color:var(--coral);border:1px solid rgba(247,107,107,.35)}.explanation{border-top:1px dashed var(--line);padding-top:22px;margin-top:8px}.explanation-label{font-family:IBM Plex Mono,monospace;font-size:11.5px;font-weight:700;letter-spacing:.08em;color:var(--text-dim);margin-bottom:12px;display:flex;align-items:center;gap:8px}.explanation-label:before{content:"";width:3px;height:14px;background:var(--amber);border-radius:2px}.explanation-source{font-family:IBM Plex Mono,monospace;font-size:12px;color:var(--text-dim);word-break:break-all;margin-bottom:14px;padding-bottom:14px;border-bottom:1px dashed var(--line)}.explanation-text{font-size:13.5px;line-height:1.85;color:var(--text-mid);white-space:pre-wrap;word-break:break-word}.explanation-text a,.explanation-text .url-line{color:var(--amber);word-break:break-all}.image-note{font-family:IBM Plex Mono,monospace;font-size:12px;color:var(--coral);background:var(--coral-dim);border:1px solid rgba(247,107,107,.3);padding:10px 14px;border-radius:7px;margin-bottom:20px}.footer-nav{display:flex;justify-content:space-between;margin-top:34px;padding-top:22px;border-top:1px solid var(--line-soft)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-dim);font-family:IBM Plex Mono,monospace;gap:10px}.empty-state .big{font-size:15px;color:var(--text-mid)}@media (max-width: 720px){.sidebar{position:fixed;z-index:10;left:-272px;transition:left .2s;box-shadow:0 0 40px #00000080}.sidebar.open{left:0}.topbar{padding:14px 16px}.question-card{padding:0 16px}}