:root{font-family:system-ui,-apple-system,'맑은 고딕',sans-serif;color:#172b3a;background:#f5f7f9;font-size:16px;line-height:1.6;--blue:#245be8;--border:#e1e7ed}*{box-sizing:border-box}body{margin:0}header{max-width:1160px;margin:auto;padding:26px 30px;display:flex;justify-content:space-between;align-items:center}.brand{font-size:21px;font-weight:800;color:inherit;text-decoration:none;display:flex;gap:10px}.brand:first-letter{color:var(--blue)}.badge{background:#e7edf5;padding:5px 12px;border-radius:30px;font-size:13px;color:#42586e}main{max-width:1080px;margin:auto;padding:28px 24px}.eyebrow{color:var(--blue);font-size:13px;font-weight:700;letter-spacing:1px}h1{font-size:48px;line-height:1.22;letter-spacing:-2px;margin:14px 0}h1 br{display:none}.intro p{color:#607184;margin-bottom:34px}.mobile{display:none}.layout{display:grid;grid-template-columns:310px 1fr;gap:22px;align-items:start}.workspace{display:grid;gap:20px}.card{padding:25px;background:white;border:1px solid var(--border);border-radius:18px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}h2{font-size:17px;margin:0}.step{color:#8c9baa;font-size:13px}.muted{color:#65768a;font-size:13px}.small{font-size:12px}.center{text-align:center;font-size:13px}label{display:block;font-size:13px;font-weight:600;margin-bottom:7px}input,select,textarea{width:100%;border:1px solid #cbd5df;border-radius:9px;padding:12px;font:inherit;background:white;color:inherit}textarea{resize:vertical}button{cursor:pointer;min-height:44px;padding:10px 15px;border:1px solid var(--border);border-radius:9px;background:white;font:inherit;font-size:14px;color:inherit;transition:background .15s}button:hover{background:#edf2f8}button:disabled{cursor:not-allowed;opacity:.45}.primary{background:var(--blue);color:white;border-color:var(--blue);font-weight:650;width:100%;display:flex;justify-content:space-between;align-items:center;margin-top:16px}.primary:hover{background:#1948c2}.subtle{border:0;color:#62748a;font-size:12px;background:transparent}#leave{width:100%}.help{border-top:1px solid var(--border);margin-top:25px;padding-top:20px;font-size:12px;color:#65768a}.help strong{color:#405166}.help p{margin-bottom:0}.qr{display:flex;justify-content:center;margin-top:20px}.qr img{max-width:100%;height:auto}#copy{width:100%;margin-top:10px}.peers{display:flex;flex-wrap:wrap;gap:10px}.peer{display:flex;gap:10px;align-items:center;text-align:left;max-width:100%}.peer.active{border-color:var(--blue);background:#edf2ff}.peer small{display:block;color:#64748b}.peer .device{background:#edf1f7;border-radius:8px;width:35px;height:35px;display:grid;place-items:center;font-size:21px}.tabs{display:flex;border-bottom:1px solid var(--border);gap:18px;margin-bottom:20px}.tabs button{border:0;border-radius:0;padding:10px 0;color:#68798c}.tabs [aria-selected=true]{border-bottom:2px solid var(--blue);color:var(--blue);font-weight:700}.drop{border:1.5px dashed #b8c9e2;border-radius:12px;background:#f8faff;min-height:190px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;cursor:pointer;text-align:center;padding:15px}.drop.over{background:#e8efff;border-color:var(--blue)}.drop>span{font-size:12px;color:#697b92}.drop .upload-icon{font-size:32px;color:var(--blue);line-height:1.2}.drop .limit{font-size:11px;color:#768498}.empty{text-align:center;padding:24px;color:#718094}.empty>span{font-size:35px;color:#bac6d4}.empty p{margin:8px 0}.empty small{font-size:12px}.item{padding:16px 0;border-top:1px solid var(--border);overflow-wrap:anywhere}.item:first-child{border-top:0}.item p{white-space:pre-wrap;margin:7px 0;font-size:14px}.item a{color:var(--blue)}.item .actions{display:flex;gap:8px;margin-top:10px}.item progress{width:100%;height:7px;accent-color:var(--blue)}.guide{margin-top:28px;color:#617084;font-size:13px}.guide summary{cursor:pointer;padding:12px 0}.guide p{max-width:800px}footer{text-align:center;color:#7b8797;font-size:12px;padding:32px 0}#notice{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#172b3a;color:white;border-radius:12px;padding:12px 20px;max-width:90vw;z-index:5}#notice:empty{display:none}:focus-visible{outline:3px solid #7ba2ff;outline-offset:3px}[hidden]{display:none!important}@media(max-width:720px){header{padding:20px}.brand{font-size:18px}main{padding:16px}h1{font-size:37px}h1 br{display:block}.layout{grid-template-columns:1fr}.card{padding:20px}.intro p{font-size:14px}.mobile{display:block}.drop{min-height:170px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}