:root{color-scheme:dark;--bg:var(--theme-v20-bg, #101011);--panel:var(--theme-v20-panel, #19191b);--line:var(--theme-v20-line, #303033);--text:var(--theme-v20-text, #f3f1ee);--muted:var(--theme-v20-muted, #a5a3a6);--accent:var(--theme-v20-accent, #8b7cf6);--accent2:var(--theme-v20-accent2, #c47cff);--on-accent:var(--theme-v20-on-accent, #ffffff)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.6 -apple-system,BlinkMacSystemFont,'Segoe UI','Microsoft YaHei',sans-serif}button,input,textarea,select{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{background:var(--theme-v20-panel2, #272729);color:var(--text);border:1px solid var(--theme-v20-line, #38383b);border-radius:9px;padding:9px 14px;cursor:pointer;transition:background .15s}button:hover{background:var(--theme-v20-panel2, #38383a)}button:disabled{opacity:.5;cursor:wait}a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}[hidden]{display:none!important}.sidebar{width:222px;position:fixed;inset:0 auto 0 0;border-right:1px solid var(--line);padding:32px 18px;background:var(--theme-v20-bg, #161618);display:flex;flex-direction:column;gap:8px}.brand{display:flex;align-items:center;gap:12px;font-size:25px;line-height:1.4;margin:0 10px 40px}.brand span{font-size:16px;font-weight:700}.brand small{display:block;font-size:9px;letter-spacing:2px;color:var(--muted);font-weight:400}.nav-label{font-size:11px;color:var(--theme-v20-muted, #89868c);padding:0 12px 12px}.nav{text-align:left;border:0;background:transparent;padding:13px 15px;color:var(--muted)}.nav.active{background:var(--theme-v20-panel2, #303033);color:var(--theme-v20-text, #fff)}.side-bottom{margin-top:auto;display:grid;gap:15px;padding:20px 10px;color:var(--muted);font-size:12px}.side-bottom p{font-size:11px;color:var(--theme-v20-muted, #78747b)}main{margin-left:222px;padding:32px 36px 70px;max-width:1800px}header{display:flex;align-items:center;justify-content:space-between;margin-bottom:25px;gap:20px}header a{font-size:12px;color:var(--muted)}.music-header-actions{display:flex;align-items:center;justify-content:flex-end;gap:10px;flex-shrink:0}.music-home-back{display:inline-flex;align-items:center;gap:7px;min-height:40px;padding:8px 12px;border:1px solid color-mix(in srgb,var(--accent) 32%,var(--line));border-radius:11px;background:color-mix(in srgb,var(--accent) 9%,var(--panel));color:var(--text);font-weight:700}.music-home-back:hover{background:color-mix(in srgb,var(--accent) 16%,var(--panel));color:var(--text)}.music-home-back svg{width:16px;height:16px;flex:0 0 auto}.music-account-link{padding:8px 2px}h1{font-size:30px;letter-spacing:-1px;margin:8px 0}h2{font-size:18px;margin:0}h3{font-size:17px}.eyebrow{font-size:10px;letter-spacing:2px;color:var(--muted)}.studio-grid{display:grid;grid-template-columns:minmax(300px,390px) minmax(0,1fr);gap:28px;align-items:start}.panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:23px}.section-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:18px}.pill{border:1px solid var(--theme-v20-line, #575049);border-radius:20px;padding:3px 10px;font-size:10px;color:var(--accent);letter-spacing:1px}.tabs{display:flex;background:var(--theme-v20-bg, #101011);border-radius:9px;padding:4px;margin:16px 0 22px}.tabs button{border:0;background:transparent;flex:1;color:var(--muted)}.tabs button.active{background:var(--theme-v20-panel2, #383437);color:var(--theme-v20-text, white)}label{display:block;margin:15px 0;color:var(--theme-v20-text, #c2bfc3);font-size:12px}input,select,textarea{display:block;width:100%;border:1px solid var(--theme-v20-line, #3a383c);border-radius:9px;color:var(--text);background:var(--theme-v20-panel2, #222124);padding:11px 12px;margin-top:7px;outline:none}input:focus,select:focus,textarea:focus{border-color:var(--accent)}textarea{resize:vertical;line-height:1.8;min-height:70px}textarea::placeholder,input::placeholder{color:var(--theme-v20-muted, #77737d)}input:disabled,textarea:disabled{opacity:.5}.pair{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:center}.check{display:flex;align-items:center;gap:9px}.check input{width:16px;height:16px;margin:0;accent-color:var(--accent)}.hint{color:var(--muted);font-size:11px;line-height:1.8}.cost-row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:24px 0 15px;color:var(--muted);font-size:11px}.cost-row strong{color:var(--accent);white-space:nowrap}.primary{background:linear-gradient(110deg,var(--accent),var(--accent2));color:var(--on-accent);border:none;font-weight:750;box-shadow:0 3px 20px color-mix(in srgb,var(--accent) 22%,transparent)}.primary:hover{background:linear-gradient(110deg,color-mix(in srgb,var(--accent) 88%,white),color-mix(in srgb,var(--accent2) 88%,white))}.full{width:100%;margin-bottom:8px;padding:13px}details{border-top:1px solid var(--line);padding-top:14px}summary{cursor:pointer;color:var(--muted);font-size:12px}.hero{position:relative;overflow:hidden;min-height:290px;background:radial-gradient(ellipse at 90% 110%,color-mix(in srgb, var(--theme-v20-danger-soft, #905d50) 31.373%, transparent),transparent 65%),linear-gradient(120deg,var(--theme-v20-accent2-soft, #30232e),var(--theme-v20-panel2, #202028));border:1px solid var(--theme-v20-line, #473841);border-radius:16px;padding:32px;margin-bottom:30px}.hero h2{position:relative;font-size:40px;line-height:1.25;margin:20px 0;z-index:1}.hero p{max-width:310px;position:relative;z-index:1;color:var(--theme-v20-muted, #bcb0b9);font-size:12px}.hero button{position:relative;z-index:1;background:color-mix(in srgb, var(--theme-v20-panel, #ffffff) 4.314%, transparent);font-size:12px}.record{position:absolute;width:250px;height:250px;border-radius:50%;right:-60px;top:50px;background:repeating-radial-gradient(circle,var(--theme-v20-panel2, #222125) 0 3px,var(--theme-v20-panel2, #343137) 4px 5px);box-shadow:0 0 50px color-mix(in srgb, var(--theme-v20-accent, #ad687d) 18.824%, transparent);transform:rotate(-25deg)}.record i{position:absolute;width:85px;height:85px;border-radius:50%;background:radial-gradient(circle,var(--theme-v20-panel2, #262028) 0 5px,var(--theme-v20-warn-soft, #cc906d) 6px,var(--theme-v20-accent2-soft, #805569) 100%);inset:82px}.preset-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:32px}.preset{min-height:88px;text-align:left;background:linear-gradient(135deg,var(--theme-v20-panel2, #332832),var(--theme-v20-panel2, #252528));padding:16px;border-color:var(--theme-v20-line, #453640)}.preset:nth-child(2n){background:linear-gradient(135deg,var(--theme-v20-cyan-soft, #253331),var(--theme-v20-panel2, #222928));border-color:var(--theme-v20-cyan, #334441)}.preset:nth-child(3n){background:linear-gradient(135deg,var(--theme-v20-warn-soft, #333025),var(--theme-v20-panel2, #292725));border-color:var(--theme-v20-line, #443f34)}.preset b{display:block;font-size:13px}.preset small{color:var(--theme-v20-muted, #aca4ad);font-size:10px}.track{border:1px solid var(--line);border-radius:12px;background:var(--theme-v20-bg, #1b1b1e);padding:18px;margin-bottom:12px;overflow:hidden}.track-top{display:flex;gap:14px;align-items:center}.cover{width:58px;height:58px;object-fit:cover;border-radius:9px;background:linear-gradient(135deg,var(--theme-v20-panel2, #614d65),var(--theme-v20-warn-soft, #bc8156));display:grid;place-items:center;font-size:25px;flex-shrink:0}.track h3{font-size:15px;margin:0}.track small{color:var(--muted);font-size:11px}.track p{font-size:12px;color:var(--muted)}audio{width:100%;height:36px;margin-top:16px}.track-actions{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}.track-actions a,.track-actions button{font-size:11px;padding:6px 10px;border:1px solid var(--line);border-radius:7px}.status{font-size:10px;color:var(--accent);margin-left:auto}.track pre,pre{white-space:pre-wrap;overflow-wrap:anywhere;font:12px/1.8 inherit;color:var(--theme-v20-text, #c9c1cd);background:var(--theme-v20-bg, #111113);padding:15px;border-radius:8px}.empty{padding:50px 22px;text-align:center;color:var(--muted);border:1px dashed var(--theme-v20-line, #3c383e);border-radius:14px;line-height:2}.assistant-grid{display:grid;grid-template-columns:minmax(320px,410px) minmax(0,1fr);gap:28px}.file-label{padding:12px;border:1px dashed var(--theme-v20-warn, #5e4e45);border-radius:9px;color:var(--accent)}.file-label input{font-size:11px;border:0;background:transparent;padding:4px 0}.conversation{margin-top:20px;color:var(--muted);font-size:12px}.conversation p{padding:12px;border-left:2px solid var(--theme-v20-warn, #695043);white-space:pre-wrap}.library-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:15px}.filters{display:flex;gap:12px;margin-bottom:25px;align-items:center}.filters>*{margin:0;max-width:300px}.guide{max-width:880px}.guide h2{font-size:28px;margin:18px 0 30px}.guide h3{color:var(--accent);margin-top:32px}.guide p{color:var(--theme-v20-muted, #beb8c1);line-height:2}.guide pre{border:1px solid var(--line)}#notice:not(:empty){padding:13px 17px;border:1px solid var(--theme-v20-warn, #6a4937);background:var(--theme-v20-warn-soft, #34271f);color:var(--theme-v20-warn, #f7c19b);border-radius:9px;margin-bottom:18px}#notice.error{border-color:var(--theme-v20-danger, #8a414d);color:var(--theme-v20-danger, #f6a4ae)}.plan-analysis{white-space:pre-wrap;color:var(--theme-v20-text, #c5bdc9);font-size:13px;margin-bottom:22px}.plan-track{margin-bottom:15px}.plan-track textarea{font-size:12px}#newProject{font-size:11px;padding:10px}.plan-header{display:flex;justify-content:space-between;align-items:center;gap:10px}.plan-header span{font-size:10px;color:var(--accent)}@media(min-width:1500px){.record{right:10%;width:270px;height:270px}.record i{inset:92px}.hero h2{font-size:46px}}@media(max-width:1150px){.sidebar{width:180px;padding:28px 12px}main{margin-left:180px;padding:25px 22px}.studio-grid,.assistant-grid{gap:18px;grid-template-columns:330px minmax(0,1fr)}.preset-grid{grid-template-columns:1fr 1fr}.hero{padding:23px}.record{right:-130px}.hero h2{font-size:33px}.section-head{flex-wrap:wrap}}@media(max-width:900px){.sidebar{width:74px;padding:25px 8px}.brand{margin:0 auto 24px;font-size:23px}.brand span,.nav-label,.side-bottom{display:none}.nav{font-size:11px;padding:12px 5px;text-align:center}main{margin-left:74px;padding:20px 16px}.studio-grid,.assistant-grid{grid-template-columns:1fr}.composer{max-width:none}.hero{min-height:250px}.record{right:5%}.preset-grid{grid-template-columns:repeat(3,1fr)}.filters{flex-wrap:wrap}.filters>*{max-width:none;flex:1;min-width:130px}}@media(max-width:550px){.sidebar{position:sticky;top:0;width:100%;height:60px;flex-direction:row;z-index:20;border-right:0;border-bottom:1px solid var(--line);padding:7px}.brand{margin:auto 5px}.nav{flex:1;font-size:10px;padding:5px}.brand span{display:none}main{margin-left:0;padding:20px 12px}header{align-items:flex-start}.music-account-link{display:none}.music-home-back{display:inline-flex;padding:8px 10px}.music-home-back span{display:none}h1{font-size:26px}.panel{padding:18px}.record{right:-90px}.preset-grid{grid-template-columns:1fr 1fr}.hero p{max-width:230px}.section-head>div{display:flex;flex-wrap:wrap;gap:5px}.assistant-grid{grid-template-columns:minmax(0,1fr)}}
/* Tablet: maintain a usable two-column creation workspace in landscape. */
.mt-launch{display:flex;flex-wrap:wrap;gap:8px;margin:15px 0 22px}.mt-launch button{min-height:44px}.track-top>div{min-width:0}.track h3{overflow-wrap:anywhere}.composer,.workspace,.assistant-grid>section{min-width:0}.track-actions button,.track-actions a{min-height:44px;display:inline-flex;align-items:center}.cost-row{flex-wrap:wrap}input,select,button{touch-action:manipulation}
@media(min-width:768px) and (max-width:1180px){.sidebar{width:88px;padding:22px 7px}.brand{margin:0 auto 25px}.brand span,.nav-label,.side-bottom{display:none}.nav{font-size:12px;text-align:center;padding:13px 4px;min-height:52px}main{margin-left:88px;padding:22px 20px 50px}.studio-grid{grid-template-columns:minmax(300px,.95fr) minmax(300px,1.05fr);gap:18px}.assistant-grid{grid-template-columns:minmax(290px,1fr) minmax(290px,1fr);gap:18px}.panel{padding:20px}.hero{min-height:220px;padding:23px}.hero h2{font-size:32px}.record{width:210px;height:210px;right:-115px}.preset-grid{grid-template-columns:1fr 1fr;gap:8px}.preset{padding:12px;min-height:76px}input,select,textarea{font-size:16px}button{min-height:44px}.filters{display:grid;grid-template-columns:1fr 1fr}.filters>*{width:100%;max-width:none}.library-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.section-head{flex-wrap:wrap}}
@media(min-width:768px) and (max-width:850px) and (orientation:portrait){.studio-grid,.assistant-grid{grid-template-columns:minmax(0,1fr)}.composer{display:block}.workspace .hero{min-height:200px}.preset-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.record{right:3%}}
@media(max-width:767px){input,select,textarea{font-size:16px}.studio-grid,.assistant-grid{grid-template-columns:minmax(0,1fr)}.library-grid{grid-template-columns:minmax(0,1fr)}}

/* V22 music navigation + theme adaptation */
@media(max-width:900px){.music-header-actions{gap:6px}.music-home-back{min-width:42px;justify-content:center}.music-home-back span{display:none}}
@media(max-width:550px){.music-header-actions{padding-top:2px}.music-home-back{width:42px;height:42px;padding:0;border-radius:12px}.music-home-back svg{width:18px;height:18px}}