:root{--teal:#087f89;--teal-dark:#066c75;--teal-soft:#e9f6f6;--navy:#071a35;--ink:#101828;--slate:#445970;--muted:#667085;--line:#d8e0e8;--soft:#f6f9fb;--font:Pretendard,"Noto Sans KR","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;color-scheme:light}
*{box-sizing:border-box} [hidden]{display:none!important} body{margin:0;background:#f8fafb;color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.65;word-break:keep-all} a{color:var(--teal-dark);text-underline-offset:3px} button,input,select{font:inherit} button,a,input,select,summary{-webkit-tap-highlight-color:transparent} button{cursor:pointer} button:disabled{cursor:default;opacity:.47} :focus-visible{outline:3px solid #0b969c;outline-offset:4px} h1,h2,h3,p{margin:0} h1,h2,h3{color:var(--navy)} h1{font-size:clamp(27px,3.5vw,44px);line-height:1.35;letter-spacing:-1.8px;font-weight:800} h2{font-size:22px;line-height:1.45;letter-spacing:-.6px} h3{font-size:19px} .muted{color:var(--slate)} .small{font-size:13px;line-height:1.7} .skip-link{position:absolute;left:16px;top:-60px;z-index:10;background:white;padding:10px}.skip-link:focus{top:10px} .site-header{max-width:1120px;margin:auto;min-height:90px;padding:20px 28px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{text-decoration:none;font-size:22px;font-weight:900;letter-spacing:-1px;color:var(--navy);display:flex;align-items:center;gap:12px}.brand span{font-size:10px;letter-spacing:2px;color:var(--teal);border-left:1px solid var(--line);padding-left:12px}.back-link{font-size:13px;text-decoration:none;font-weight:700}.back-link span{margin-left:5px}main{max-width:1064px;margin:auto;padding:0 28px 36px}.intro{padding:38px 0 30px}.eyebrow{font-size:12px;font-weight:800;letter-spacing:1px;color:var(--teal);margin-bottom:10px}.intro-copy{margin-top:16px;color:var(--slate);line-height:1.85}.mobile-break{display:none}.steps{display:flex;gap:30px;padding:0;margin:26px 0 0;list-style:none;font-size:13px;color:var(--slate)}.steps li{display:flex;gap:8px;align-items:center}.steps span{display:grid;place-items:center;width:25px;height:25px;border-radius:50%;background:#e5f1f1;color:var(--teal);font-size:12px;font-weight:800}.panel{background:white;border:1px solid var(--line);border-radius:18px;margin-bottom:20px;padding:28px}.connection-top,.library-heading,.selection-top,.selection-actions{display:flex;align-items:center;justify-content:space-between;gap:24px}.section-heading{display:flex;align-items:center;gap:12px;margin-bottom:6px}.connection h2{font-size:18px}.connection-description,.connection .muted{font-size:14px}.badge{font-size:11px;font-weight:800;color:var(--slate);background:#edf1f4;padding:3px 9px;border-radius:20px;white-space:nowrap}.badge.connected{color:var(--teal-dark);background:var(--teal-soft)}.badge.warning{color:#8c5116;background:#fff2dd}.button{min-height:44px;border:1px solid transparent;border-radius:9px;padding:10px 16px;font-size:13px;font-weight:750;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:10px;white-space:nowrap;line-height:1.45;background:white;color:var(--navy)}.button-primary{background:var(--teal);color:white;padding:14px 22px;font-size:15px}.button-primary:not(:disabled):hover{background:var(--teal-dark)}.button-secondary{border-color:#bbcdd4;color:var(--teal-dark)}.button-secondary:not(:disabled):hover,.button-quiet:not(:disabled):hover{background:var(--teal-soft)}.button-quiet{color:var(--teal-dark)}.button-row{display:flex;align-items:center;gap:8px}.policy-description{margin-top:16px;border-top:1px solid var(--line);padding-top:14px;font-size:13px;color:var(--slate)}.install-guide{font-size:13px;margin-top:18px;border-top:1px solid var(--line);padding-top:17px}.install-guide summary{cursor:pointer;font-weight:700;color:var(--teal-dark)}.install-content{padding:15px 0 0;color:var(--slate)}.install-content ol{margin:12px 0;padding-left:24px}.install-content li{padding:4px 0}.install-content code{font-size:12px;color:var(--navy);overflow-wrap:anywhere}.notice{padding:16px 20px;margin-bottom:20px;border:1px solid #9dc9ce;border-radius:12px;background:#eff8f8;font-size:14px;color:var(--teal-dark);overflow-wrap:anywhere}.notice-error{background:#fff5ee;color:#9d421f;border-color:#e9c5b1}.library-heading{margin-bottom:24px}.library-heading .eyebrow{margin-bottom:5px}.filters{display:grid;grid-template-columns:220px 1fr;gap:14px}.field{display:flex;flex-direction:column;gap:6px;font-size:12px;font-weight:700;color:var(--slate)}select,input[type=search]{height:46px;border:1px solid #c8d3df;border-radius:9px;background:white;color:var(--ink);padding:10px 13px;width:100%;min-width:0;font-size:14px;font-weight:400}select:disabled,input:disabled{color:#98a2b3;background:var(--soft)}.list-heading{display:flex;justify-content:space-between;gap:12px;margin:20px 0 12px;font-size:12px;color:var(--muted)}.list-heading span{font-size:11px}.song-list{border:0;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;min-width:0}.song-row{display:flex;align-items:center;gap:15px;padding:16px;border:1px solid #e2e8ee;border-radius:11px;cursor:pointer;min-width:0;transition:border-color .15s,background .15s}.song-row:hover{background:#f8fbfc}.song-row:has(input:checked){background:#f0f9f9;border-color:var(--teal);box-shadow:inset 0 0 0 1px var(--teal)}.song-row input{accent-color:var(--teal);width:18px;height:18px;margin:0;flex-shrink:0}.song-info{flex:1;min-width:0}.song-title{display:block;color:var(--navy);font-size:15px;font-weight:750;overflow-wrap:anywhere}.song-date{display:block;color:var(--muted);font-size:11px;margin-top:2px}.song-duration{font-variant-numeric:tabular-nums;font-size:12px;color:var(--slate);white-space:nowrap}.empty-state{text-align:center;padding:42px 16px;background:var(--soft);border:1px dashed var(--line);border-radius:12px}.empty-icon{display:block;margin-bottom:10px;font-size:30px;color:#8bb7bf}.empty-state p{font-size:14px;color:var(--slate);margin-top:7px}.loading{display:flex;align-items:center;justify-content:center;gap:12px;min-height:110px;color:var(--slate);font-size:14px}.spinner{width:18px;height:18px;border:2px solid #d4e5e7;border-top-color:var(--teal);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.more-row{text-align:center;margin-top:18px}.more-row:has(button[hidden]){display:none}.selection-panel{border-color:#b5d6d9;background:#fcfefe}.selected-song{min-width:0}.selected-song h2{font-size:20px;overflow-wrap:anywhere}.selected-song .eyebrow{margin-bottom:6px}.selected-song .muted{font-size:12px;margin-top:5px}.format-field{width:190px;flex-shrink:0}.selection-panel>#format-note{margin-top:18px}.selection-actions{border-top:1px solid var(--line);margin-top:20px;padding-top:22px}.transfer-progress{padding-top:24px}.progress-heading{display:flex;justify-content:space-between;gap:12px;color:var(--teal-dark);font-size:13px;margin-bottom:10px}.progress-heading span{font-variant-numeric:tabular-nums;white-space:nowrap}progress{display:block;width:100%;height:8px;accent-color:var(--teal);border:0;border-radius:20px;overflow:hidden;background:#dcecee}progress::-webkit-progress-bar{background:#dcecee}progress::-webkit-progress-value{background:var(--teal);border-radius:20px}.privacy-note{font-size:12px;color:var(--muted);line-height:1.9;padding:0 8px}.privacy-note a{white-space:nowrap;margin-left:4px}.site-footer{max-width:1064px;margin:0 auto;padding:20px 28px 32px;display:flex;justify-content:space-between;gap:16px;color:var(--muted);font-size:11px}.site-footer>span{font-weight:850;color:var(--slate);letter-spacing:.6px}dialog{border:1px solid var(--line);border-radius:20px;max-width:500px;width:calc(100% - 32px);padding:0;box-shadow:0 24px 80px #071a3526;color:var(--ink);max-height:calc(100dvh - 40px)}dialog::backdrop{background:#071a3566;backdrop-filter:blur(3px)}.dialog-content{padding:28px}.dialog-content h2{font-size:24px}.confirm-song{font-weight:750;font-size:17px;margin:18px 0 7px;overflow-wrap:anywhere}.dialog-content>p.muted{font-size:13px}.confirmation-facts{background:var(--soft);padding:16px;border-radius:12px;margin:20px 0;font-size:13px}.confirmation-facts div{display:flex;gap:14px;justify-content:space-between;padding:6px 0}.confirmation-facts dt{color:var(--slate);flex-shrink:0}.confirmation-facts dd{margin:0;text-align:right;font-weight:700}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:24px}.dialog-actions .button-primary{font-size:14px;padding:12px 18px}
@media(max-width:720px){.site-header{min-height:76px;padding:16px 20px}.brand{font-size:19px;gap:8px}.brand span{font-size:9px;padding-left:8px;letter-spacing:1px}.back-link{font-size:11px}main{padding:0 20px 25px}.intro{padding:22px 0 26px}h1{letter-spacing:-1.3px}.intro-copy{font-size:14px}.steps{gap:16px;font-size:11px}.steps span{width:23px;height:23px}.panel{padding:22px;border-radius:15px}.connection-top{align-items:flex-start;flex-direction:column;gap:16px}.connection-top>.button-row{width:100%;justify-content:flex-end}.library-heading{gap:12px}.library-heading h2{font-size:20px}.library-heading .button{padding:8px 2px;font-size:12px}.filters{grid-template-columns:160px 1fr}.selection-actions{align-items:stretch;flex-direction:column;gap:16px}.selection-actions>.button-row{justify-content:flex-end}.selection-actions .button-primary{flex:1}.selection-top{gap:16px}.format-field{width:155px}.selection-panel>#format-note{font-size:12px}.site-footer{padding:16px 20px 28px}.privacy-note{font-size:11px}.confirmation-facts div{font-size:12px}}
@media(max-width:440px){.site-header{padding:16px}.brand span{display:none}.back-link{font-size:11px}main{padding-left:16px;padding-right:16px}.mobile-break{display:block}.intro{padding-top:18px}.intro-copy br{display:none}.panel{padding:18px}.steps{gap:13px}.steps li{gap:6px}.filters{grid-template-columns:1fr}.list-heading span{display:none}.song-row{padding:13px 11px;gap:11px}.song-title{font-size:14px}.selection-top{align-items:stretch;flex-direction:column}.format-field{width:100%}.selection-actions>.button-row{flex-direction:column}.selection-actions .button{width:100%}.empty-state{padding:30px 10px}.empty-state h3{font-size:17px}.empty-state p{font-size:13px}.dialog-content{padding:22px}.dialog-actions .button{padding:12px}.site-footer{align-items:flex-start;flex-direction:column;gap:4px}.connection-top>.button-row{justify-content:flex-start}.connection-top>.button-row>.button{font-size:12px;padding:10px 12px}}
@media(prefers-reduced-motion:reduce){.spinner{animation:none}.song-row{transition:none}}
.connection-help{margin-top:16px}.connection-top>.button-row{flex-wrap:wrap;justify-content:flex-end}.button[aria-disabled="true"]{opacity:.47;cursor:default}.local-fallback{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:20px;padding-top:20px;border-top:1px solid var(--line)}.local-fallback strong{font-size:14px;color:var(--navy)}.local-fallback p{margin-top:3px}.local-fallback .button{font-size:12px}.search-form{display:flex;align-items:flex-end;gap:12px}.search-form .field{flex:1;min-width:0}.search-form>.button{height:46px;min-width:70px}
@media(max-width:560px){.local-fallback{align-items:flex-start;flex-direction:column;gap:12px}.connection-top>.button-row{justify-content:flex-start}.search-form{gap:8px}.search-form>.button{min-width:60px;padding-left:12px;padding-right:12px}}