:root{--bg-main: #eff6ff;--primary: #38bdf8;--distill: #2dd4bf;--text-main: #1e293b;--text-muted: #64748b;--border: #bae6fd;--card: #ffffff;--glass: rgba(255, 255, 255, .7);--accent-orange: #f59e0b;--text: #1e293b;--success: #10b981}*{margin:0;padding:0;box-sizing:border-box}body{background:linear-gradient(135deg,#f0f9ff,#cffafe);color:var(--text-main);font-family:Pretendard,sans-serif;line-height:1.6}#app{max-width:1200px;margin:0 auto;padding:2rem}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.home-btn{text-decoration:none;font-size:3rem;color:var(--text-muted);transition:all .2s;margin-right:1.5rem;display:inline-block}.home-btn:hover{transform:scale(1.1);color:var(--primary)}.logo{font-weight:800;font-size:1.5rem;letter-spacing:-.5px;display:flex;align-items:center}.card{background:#fff;padding:2.5rem;border-radius:32px;border:none;box-shadow:0 20px 40px #0000000d;color:#1e293b}.logo span{color:#0ea5e9}textarea{width:100%;height:140px;background:#fff;border:2px solid #bef264;border-radius:16px;padding:1.5rem;color:#1e293b;font-size:1.1rem;margin:1.5rem 0;resize:none;outline:none;border-color:#bae6fd}.primary-btn{background:var(--primary);color:#fff;border:none;padding:.8rem 2.5rem;border-radius:12px;font-weight:700;cursor:pointer;transition:.3s}.workspace-layout{display:flex;gap:3rem;margin-top:1rem}.source-side{flex:1.2;background:#fff;padding:2rem;border-radius:20px;box-shadow:0 10px 25px #00000008}.structure-side{flex:1;display:flex;flex-direction:column;align-items:flex-end}.section-badge{display:inline-block;padding:4px 12px;background:var(--border);font-size:.75rem;font-weight:800;border-radius:6px;margin-bottom:1.5rem}.sentence-item{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1rem;margin-bottom:1rem}.chunks-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.chunk{background:var(--glass);border:1px solid var(--border);padding:6px 12px;border-radius:6px;font-size:.9rem;font-weight:600;cursor:grab;transition:.2s}.chunk:hover{border-color:var(--primary);background:#6366f11a}.chunk.dragging{opacity:.5;cursor:grabbing}.logic-header{font-size:1.1rem;font-weight:800;color:var(--distill);margin-bottom:1.5rem;display:flex;align-items:center;gap:8px}.logic-steps{width:100%;display:flex;flex-direction:column;gap:1.5rem;align-items:flex-end}.logic-row{display:flex;align-items:center;gap:15px}.connector-label{font-size:1rem;font-weight:700;color:var(--text-muted)}.slots-group{display:flex;gap:10px}.distill-slot{width:100px;height:48px;border:2px dashed var(--border);border-radius:8px;display:flex;align-items:center;justify-content:center;transition:.3s;background:var(--glass)}.distill-slot.active{border-color:var(--primary);background:#6366f11a}.distilled-word{font-weight:800;font-size:.95rem;color:var(--text);animation:bounceIn .4s cubic-bezier(.175,.885,.32,1.275)}@keyframes bounceIn{0%{transform:scale(.5);opacity:0}to{transform:scale(1);opacity:1}}.blink{animation:blinkEffect .2s 3}@keyframes blinkEffect{0%,to{opacity:1}50%{opacity:0}}.distill-slot.wrong{border-color:#ef4444;background:#ef44441a}.distill-slot.success{border-color:#10b981;background:#10b9811a}.distilled-word[draggable=true]{cursor:grab}.distilled-word[draggable=true]:active{cursor:grabbing}.final-bridge{margin-top:2rem;width:100%;display:flex;flex-direction:column;align-items:center}.arrow-down{width:0;height:0;border-left:100px solid transparent;border-right:100px solid transparent;border-top:30px solid var(--accent-orange);margin-bottom:1.5rem}.final-summary-row{display:flex;gap:10px;margin-top:1rem;justify-content:flex-end;width:100%}.final-summary-row .distill-slot{width:120px;height:54px}.actions{display:flex;justify-content:center;margin-top:3rem}.secondary-btn{background:none;border:1px solid var(--border);color:var(--text-muted);padding:.6rem 1.5rem;border-radius:8px;cursor:pointer}.workspace-header{display:flex;justify-content:space-between;margin-bottom:1.5rem}.header-left{flex:1.2}.header-right{flex:1;text-align:left;padding-left:2rem;border-left:1px solid var(--border)}.flow-steps-container{display:flex;flex-direction:column;gap:1rem}.v5-combined-row{display:flex;background:#fff;border:none;border-radius:32px;overflow:hidden;min-height:220px;transition:.3s;box-shadow:0 10px 30px #0000000a}.v5-combined-row:hover{border-color:var(--primary);background:#ffffff0a}.v5-sentence-cell{flex:1.2;padding:2rem;border-right:1px solid var(--border);display:flex;flex-direction:column}.v5-logic-cell{flex:1;padding:2rem;background:#f8fafc;display:flex;flex-direction:column;gap:1.5rem;border-left:2px solid #f1f5f9}.final-bridge-section{margin-top:3rem;display:flex;flex-direction:column;align-items:center;gap:1.5rem}.arrow-down-divider{width:0;height:0;border-left:80px solid transparent;border-right:80px solid transparent;border-top:24px solid var(--accent-orange)}.summary-question{font-size:1.3rem;font-weight:800;color:var(--text)}#flow-workspace{margin-top:2rem}.section-header{margin-bottom:2rem}.section-header .badge{background:var(--primary);color:#fff;padding:4px 12px;border-radius:100px;font-size:.7rem;font-weight:800;margin-bottom:.5rem;display:inline-block}.sentence-item{background:#fff;border:2px solid #e2e8f0;border-radius:20px;padding:1.5rem;margin-bottom:1.5rem}.sent-header{margin-bottom:1rem}.sent-num{font-size:.7rem;color:var(--primary);font-weight:800;text-transform:uppercase}.sent-text{font-size:1.1rem;font-weight:600;line-height:1.6;color:var(--text)}.clauses-container{display:flex;flex-wrap:wrap;gap:10px}.clause-block{background:var(--card);border:1px solid var(--border);padding:10px 18px;border-radius:12px;font-size:.95rem;font-weight:600;cursor:grab;transition:.2s;box-shadow:0 4px 6px #0000001a}.clause-block:hover{border-color:var(--primary);transform:translateY(-2px);background:#6366f11a}.logic-row-v5{background:#fff;border:2px solid #bae6fd;border-radius:24px;padding:2rem;margin-bottom:1.5rem;display:flex;flex-direction:column;gap:1.5rem;box-shadow:0 4px 12px #00000005}.label{font-size:.8rem;color:var(--text-muted);font-weight:700;margin-bottom:.8rem}.button-group{display:flex;gap:8px;flex-wrap:wrap}.role-btn{background:var(--glass);border:1px solid var(--border);color:var(--text-muted);padding:8px 16px;border-radius:10px;font-size:.9rem;font-weight:700;cursor:pointer;transition:.2s}.role-btn:hover{background:#ffffff1a}.role-btn.selected{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 4px 12px #6366f166}.distill-slot{min-width:150px;min-height:60px;border:2px dashed #bae6fd;border-radius:16px;display:flex;align-items:center;justify-content:center;background:#fff;padding:10px;transition:.3s}.distill-slot.active{border-color:var(--primary);background:#6366f10d}.tree-viz-container{margin-top:4rem;padding:3rem;background:#fff;border-radius:40px;border:none;box-shadow:0 15px 40px #0000000d;text-align:center}.summary-pool{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;max-width:800px;margin:2rem auto}.pool-chip{background:var(--card);border:1px solid var(--border);padding:12px 24px;border-radius:100px;font-size:1rem;font-weight:600;cursor:pointer;transition:.3s;-webkit-user-select:none;user-select:none}.pool-chip:hover{border-color:var(--primary);background:#6366f10d}.pool-chip.selected{background:var(--primary);color:#fff;border-color:var(--primary);transform:scale(1.05);box-shadow:0 8px 15px #6366f14d}.selection-footer{display:flex;align-items:center;justify-content:center;font-size:1rem;font-weight:700;color:var(--text-muted)}#selection-count{color:var(--primary);font-size:1.2rem;margin:0 5px}.feedback-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem}.feedback-card-v5{background:#ffffff08;border-radius:24px;padding:2rem;border:1px solid var(--border)}.feedback-card-v5 h3{margin-bottom:1rem;color:var(--primary);font-size:1.1rem}.type-label{font-size:1.3rem;font-weight:800;color:var(--text);margin-bottom:1.5rem}.feedback-text{line-height:1.7;font-size:1.05rem}.strength-box{color:var(--success);margin-bottom:1rem}.suggest-box{color:var(--accent-orange)}.discourse-tree-wrapper{display:flex;justify-content:center;overflow-x:auto;padding:2rem 0}.tree-node-v5{display:flex;flex-direction:column;align-items:center}.node-box{background:var(--card);border:1px solid var(--border);padding:1.2rem;border-radius:20px;width:260px;position:relative;box-shadow:0 10px 20px #0003;z-index:2}.rel-badge{position:absolute;top:-12px;left:50%;transform:translate(-50%);background:var(--primary);color:#fff;padding:2px 12px;border-radius:100px;font-size:.75rem;font-weight:800}.node-text{font-size:.95rem;line-height:1.4;font-weight:500;margin:0}.children-container{display:flex;gap:3rem;margin-top:3rem;position:relative}.children-container:before{content:"";position:absolute;top:-3rem;left:50%;height:3rem;width:2px;background:var(--border)}.feedback-flex-container{display:flex;gap:2rem;max-width:1200px;margin:0 auto}.summary-card,.recommend-card{flex:1;background:#fff;padding:3rem;border-radius:32px;text-align:center;box-shadow:0 10px 30px #0000000d}.grade-badge{display:inline-block;padding:12px 40px;border-radius:100px;color:#fff;font-size:2.4rem;font-weight:900;margin:1.5rem 0}.rec-box{background:#f8fafc;border:2px dashed var(--primary);padding:1.5rem;border-radius:16px;font-weight:700;font-size:1.1rem;color:var(--text-main);margin:1.5rem 0}.relation-selector{display:flex;align-items:center;gap:8px;background:#6366f11a;padding:6px 12px;border-radius:12px;border:1px solid rgba(99,102,241,.3)}.rel-select{background:none;border:none;color:var(--primary);font-weight:800;font-size:.85rem;cursor:pointer;outline:none;-webkit-appearance:none;-moz-appearance:none;appearance:none}.rel-arrow{color:var(--primary);font-weight:900;font-size:.9rem}#discourse-tree-viz{animation:fadeInUp .8s ease-out}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.difficulty-badge{background:linear-gradient(135deg,#1e293b,#334155);color:#fff;padding:6px 14px;border-radius:20px;font-size:.9rem;font-weight:700;box-shadow:0 4px 10px #00000026;display:inline-flex;align-items:center;gap:6px;border:1px solid rgba(255,255,255,.1);animation:fadeInScale .4s ease-out forwards}.difficulty-badge span{color:#fca5a5;font-weight:900}@keyframes fadeInScale{0%{opacity:0;transform:scale(.8) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}