:root{color-scheme:dark;--ink: #0f1218;--ink-soft: #141922;--panel: #171c26;--panel-2: #1d2430;--line: #2a3242;--line-soft: #222a37;--text: #edf1f7;--text-2: #b6c0cf;--muted: #7f8ba0;--amber: #ffb454;--amber-strong: #ff9f2e;--teal: #43d9c9;--coral: #ff7d6e;--lavender: #a78bfa;--green: #7fd89a;--red: #ff6b6b;--radius: 8px;--radius-sm: 6px;--shadow: 0 10px 30px rgba(0, 0, 0, .28);font-family:ui-sans-serif,system-ui,-apple-system,PingFang SC,Microsoft YaHei,Segoe UI,sans-serif;font-size:14px;line-height:1.45}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--ink);color:var(--text);overflow:hidden}button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}input,select,textarea{font:inherit;color:inherit}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--teal);outline-offset:1px}.app-shell{display:flex;flex-direction:column;height:100vh}.topbar{flex:none;height:58px;display:flex;align-items:center;gap:18px;padding:0 16px;background:#12161e;border-bottom:1px solid var(--line);z-index:20}.brand{display:flex;align-items:center;gap:10px;min-width:170px}.brand-mark{width:34px;height:34px;border-radius:var(--radius);display:grid;place-items:center;color:#10131a;background:linear-gradient(135deg,var(--amber),var(--coral));box-shadow:0 4px 14px #ff9d5247}.brand-text{display:flex;flex-direction:column;line-height:1.15}.brand-text strong{font-size:16px;letter-spacing:.02em}.brand-text span{font-size:11px;color:var(--muted)}.title-editor{flex:1;min-width:0;display:flex;align-items:baseline;gap:12px}.title-editor input{min-width:0;width:min(420px,55vw);background:transparent;border:1px solid transparent;border-radius:var(--radius-sm);padding:6px 10px;font-size:17px;font-weight:650;letter-spacing:0}.title-editor input:hover{border-color:var(--line-soft);background:var(--ink-soft)}.title-editor input:focus{background:var(--ink-soft);border-color:var(--teal)}.title-meta{color:var(--muted);font-size:12px;white-space:nowrap}.title-placeholder{flex:1;color:var(--muted);font-size:15px}.topbar-actions{display:flex;align-items:center;gap:8px}.topbar-icon{width:36px;height:36px}.workspace{flex:1;min-height:0;display:grid;grid-template-columns:248px minmax(0,1fr) 320px}.sidebar{overflow-y:auto;padding:14px 12px;background:#12161e;border-right:1px solid var(--line);min-height:0}.new-song-button{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;height:40px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);color:var(--text-2);font-weight:600;margin-bottom:18px;transition:border-color .15s,background .15s,color .15s}.new-song-button:hover{border-color:var(--amber);color:var(--amber);background:#1c1f28}.library-label{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:0 6px;margin-bottom:8px}.song-list{display:flex;flex-direction:column;gap:8px}.song-card{width:100%;text-align:left;padding:11px 12px;border:1px solid transparent;border-radius:var(--radius);background:transparent;transition:background .15s,border-color .15s}.song-card:hover{background:var(--ink-soft)}.song-card-active{background:var(--panel-2);border-color:#384258}.song-card-top{display:flex;align-items:center;justify-content:space-between;gap:8px}.song-card-top strong{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.song-delete{display:grid;place-items:center;width:24px;height:24px;border-radius:var(--radius-sm);color:var(--muted);flex:none}.song-delete:hover{color:var(--red);background:#ff6b6b1f}.song-card-tags{display:flex;flex-wrap:wrap;gap:5px;margin-top:8px}.song-card-tags span{font-size:11px;color:var(--text-2);background:#232b3a;border-radius:999px;padding:2px 8px}.song-card-date{margin-top:7px;font-size:11px;color:var(--muted)}.library-empty{display:flex;flex-direction:column;align-items:center;gap:10px;color:var(--muted);text-align:center;padding:28px 10px;font-size:13px}.main-column,.side-column{overflow-y:auto;min-height:0}.main-column{padding:16px;display:flex;flex-direction:column;gap:14px;background:var(--ink)}.side-column{padding:16px;background:#11151d;border-left:1px solid var(--line)}.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.panel-title-row{display:flex;align-items:center;gap:8px;color:var(--amber)}.panel-title-row h2{margin:0;font-size:15px;font-weight:700;color:var(--text);letter-spacing:0}.panel-kicker{font-size:12px;color:var(--muted)}.field{margin-bottom:14px}.field label,.field>.label{display:block;font-size:12px;font-weight:600;color:var(--text-2);margin-bottom:7px}.field-row{display:flex;gap:12px}.field.half{flex:1;min-width:0}.theme-row{display:flex;gap:8px}.theme-row input{flex:1;min-width:0;height:40px;padding:0 12px;border:1px solid var(--line);border-radius:var(--radius);background:var(--ink-soft);color:var(--text)}.theme-row input::placeholder{color:var(--muted)}.theme-row input:focus{border-color:var(--teal)}.icon-button{width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);color:var(--text-2);background:var(--panel-2);border:1px solid var(--line-soft);flex:none;transition:color .15s,border-color .15s,background .15s}.icon-button:hover{color:var(--amber);border-color:#4a3a26;background:#211f1d}.icon-button.danger:hover{color:var(--red);border-color:#4a2626;background:#231b1d}.chip-grid{display:flex;flex-wrap:wrap;gap:7px}.chip{height:30px;padding:0 12px;border-radius:999px;border:1px solid var(--line);background:var(--panel-2);color:var(--text-2);font-size:12.5px;transition:border-color .15s,color .15s,background .15s}.chip:hover{border-color:#4b5872;color:var(--text)}.chip-active{border-color:var(--amber);color:#19130a;background:var(--amber);font-weight:650}.chip-active.mood-sad,.chip-active.mood-nostalgic,.chip-active.mood-angry{border-color:var(--lavender);background:var(--lavender);color:#14101f}.chip-active.mood-dreamy,.chip-active.mood-peaceful{border-color:var(--teal);background:var(--teal);color:#0a1715}.chip-active.mood-romantic{border-color:var(--coral);background:var(--coral);color:#1e0d0a}.segmented{display:inline-flex;gap:4px;padding:4px;background:var(--ink-soft);border:1px solid var(--line);border-radius:var(--radius)}.segmented button{display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 13px;border-radius:5px;color:var(--muted);font-size:12.5px;transition:background .15s,color .15s}.segmented button:hover{color:var(--text)}.segmented .segment-active{background:var(--panel-2);color:var(--teal);font-weight:650;box-shadow:inset 0 0 0 1px #3b4c5c}.engine-segmented{width:100%}.engine-segmented button{flex:1;justify-content:center}.engine-hint{margin-top:8px;font-size:12px}.hint-ok{color:var(--green)}.slider-row{display:flex;align-items:center;gap:10px}.slider-row input[type=range],.tempo-control input[type=range]{flex:1;min-width:0;accent-color:var(--amber)}.tempo-value{min-width:34px;text-align:right;font-variant-numeric:tabular-nums;color:var(--amber);font-weight:650;font-size:13px}.structure-list{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:8px}.structure-item{display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 10px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--panel-2);color:var(--muted);font-size:12.5px}.structure-item:hover{color:var(--text)}.structure-on{border-color:#3d5570;color:var(--teal);background:#16242b}.structure-check{width:15px;height:15px;border-radius:4px;border:1px solid #46536a;display:inline-grid;place-items:center;font-size:10px;color:transparent}.structure-on .structure-check{color:#08100f;background:var(--teal);border-color:var(--teal)}.text-button{font-size:12px;color:var(--teal);padding:3px 0;text-decoration:underline;text-underline-offset:3px}.text-button:hover{color:#7ff0e4}.primary-button{height:42px;padding:0 18px;border-radius:var(--radius);display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;color:#141008;background:linear-gradient(135deg,var(--amber),#ff9d52);box-shadow:0 6px 18px #ff9d5238;transition:transform .12s,box-shadow .12s,filter .12s}.primary-button:hover:not(:disabled){filter:brightness(1.06);transform:translateY(-1px)}.primary-button:disabled{opacity:.55;cursor:not-allowed;box-shadow:none}.secondary-button{height:36px;padding:0 13px;border-radius:var(--radius-sm);display:inline-flex;align-items:center;justify-content:center;gap:7px;border:1px solid var(--line);background:var(--panel-2);color:var(--text-2);font-size:13px;font-weight:600}.secondary-button:hover{border-color:#4b5872;color:var(--text)}.generate-button{width:100%;margin-top:4px}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-banner{margin-top:12px;display:flex;align-items:center;gap:8px;padding:10px 12px;border:1px solid #5a2b2b;background:#ff6b6b14;border-radius:var(--radius-sm);color:#ff9d9d;font-size:12.5px}.sections-stack{display:flex;flex-direction:column;gap:12px}.section-block{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel-2);overflow:hidden}.section-header{display:flex;align-items:center;gap:9px;padding:10px 12px;border-bottom:1px solid var(--line-soft);background:#1b222e}.section-header h3{margin:0;font-size:13.5px;font-weight:650}.section-badge{width:24px;height:24px;border-radius:5px;display:grid;place-items:center;font-size:11px;font-weight:800;color:#111;background:var(--amber)}.section-badge-preChorus{background:var(--teal)}.section-badge-chorus{background:var(--coral)}.section-badge-bridge{background:var(--lavender)}.section-badge-outro{background:#9fb2c4}.section-meta{margin-left:auto;font-size:11.5px;color:var(--muted)}.lines-list{padding:8px 12px 12px;display:flex;flex-direction:column;gap:7px}.line-row{display:flex;align-items:center;gap:9px}.line-number{width:18px;text-align:right;font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums;flex:none}.line-input{flex:1;min-width:0;height:38px;padding:0 11px;border:1px solid var(--line-soft);border-radius:var(--radius-sm);background:var(--ink-soft);color:var(--text)}.line-input:hover{border-color:#39445a}.line-input:focus{border-color:var(--teal);background:#151a24}.line-meta{display:flex;align-items:center;gap:6px;flex:none}.syllable-count{min-width:26px;height:22px;display:grid;place-items:center;border-radius:999px;background:#232b3a;color:var(--text-2);font-size:11px;font-variant-numeric:tabular-nums}.rhyme-tag{height:22px;padding:0 8px;display:inline-flex;align-items:center;border-radius:999px;background:#a78bfa24;color:#c5b7ff;font-size:11px}.welcome-panel{position:relative;overflow:hidden;display:grid;grid-template-columns:210px 1fr;align-items:center;gap:28px;min-height:330px}.welcome-art{width:210px;height:210px;object-fit:cover;border-radius:var(--radius);display:block}.welcome-kicker{display:inline-flex;align-items:center;gap:6px;color:var(--amber);font-size:12px;font-weight:700;letter-spacing:.06em}.welcome-copy h1{margin:10px 0 8px;font-size:26px;line-height:1.25;letter-spacing:0}.welcome-copy p{color:var(--text-2);max-width:460px;margin-bottom:18px}.cover-wrap{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:1}.cover-art{width:100%;height:100%;object-fit:cover;display:block}.cover-shade{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(to top,#080a0fdb,#080a0f0d 60%)}.cover-caption{position:absolute;left:14px;right:14px;bottom:14px;display:flex;flex-direction:column;gap:2px}.cover-label{font-size:10px;font-weight:800;letter-spacing:.16em;color:var(--amber)}.cover-caption strong{font-size:18px;line-height:1.2;overflow-wrap:anywhere}.cover-caption>span:last-child{font-size:12px;color:var(--text-2)}.song-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:14px 0}.stat{display:flex;flex-direction:column;gap:2px;padding:10px;border:1px solid var(--line-soft);border-radius:var(--radius-sm);background:var(--panel-2);color:var(--muted)}.stat svg{color:var(--teal);margin-bottom:4px}.stat-label{font-size:11px}.stat strong{color:var(--text);font-size:13px;font-variant-numeric:tabular-nums}.brief-section,.chord-strip{border-top:1px solid var(--line-soft);padding-top:14px;margin-top:4px}.brief-title{display:flex;align-items:center;gap:7px;font-size:12px;font-weight:700;color:var(--text-2);margin-bottom:10px}.brief-title svg{color:var(--amber)}.brief-item{margin-bottom:11px}.brief-label{display:block;font-size:11px;color:var(--muted);margin-bottom:5px}.tag-row{display:flex;flex-wrap:wrap;gap:6px}.mini-tag{padding:4px 9px;border-radius:999px;background:#202937;border:1px solid #2c3646;color:var(--text-2);font-size:11.5px}.hook-text{margin:0;color:var(--text);font-size:13px;font-style:italic;display:flex;gap:6px;align-items:flex-start}.hook-text svg{color:var(--coral);flex:none;margin-top:2px}.brief-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;color:var(--teal);overflow-wrap:anywhere}.style-list{margin:0;padding-left:16px;color:var(--text-2);font-size:12.5px;display:flex;flex-direction:column;gap:5px}.empty-copy{color:var(--muted);font-size:12.5px;margin:0}.chord-list{display:flex;flex-direction:column;gap:7px}.chord-line{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:var(--radius-sm);background:var(--panel-2);border:1px solid var(--line-soft);font-size:12px}.chord-section-name{color:var(--muted);min-width:44px}.chord-names{color:var(--text);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;overflow-wrap:anywhere}.section-index{margin-left:auto;color:#4d5870;font-variant-numeric:tabular-nums}.side-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;min-height:220px;color:var(--muted);text-align:center;font-size:13px}.side-empty svg{color:var(--amber)}.player-panel{padding:14px 16px 16px}.transport-row{display:flex;align-items:center;gap:16px;margin-bottom:12px}.transport-buttons{display:flex;gap:8px;align-items:center}.round-button{width:40px;height:40px;border-radius:999px;display:grid;place-items:center;border:1px solid var(--line);background:var(--panel-2);color:var(--text);transition:border-color .15s,color .15s,background .15s}.round-button:hover{border-color:var(--teal);color:var(--teal)}.play-button{width:46px;height:46px;background:var(--teal);border-color:var(--teal);color:#08100f;box-shadow:0 6px 18px #43d9c93d}.play-button:hover{background:#65e6d9;color:#08100f}.transport-control{display:flex;align-items:center;gap:8px}.transport-control label{font-size:12px;color:var(--muted);white-space:nowrap}.transport-control select{height:32px;padding:0 10px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--panel-2);color:var(--text);font-size:12.5px}.tempo-control{flex:1;min-width:0}.piano-roll{display:flex;gap:2px;height:170px;border:1px solid var(--line-soft);border-radius:var(--radius-sm);background:#10151d;overflow-x:auto;padding:8px}.roll-section{min-width:130px;flex:none;display:flex;flex-direction:column;border-radius:5px;overflow:hidden;background:#151b25;border:1px solid #222b3a;transition:border-color .2s}.roll-section-active{border-color:var(--teal)}.roll-section-header{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:5px 8px;font-size:10.5px;color:var(--text-2);border-bottom:1px solid #222b3a;background:#1a222e;white-space:nowrap}.roll-chords{color:var(--muted);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:9.5px}.roll-grid{position:relative;flex:1;min-height:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px);background-size:100% 17%}.roll-note{position:absolute;height:7px;min-height:5px;border-radius:2px;background:var(--amber);opacity:.55;transition:opacity .1s,background .1s,transform .1s}.roll-note:hover{opacity:.85}.roll-note-active{opacity:1;background:var(--teal);box-shadow:0 0 8px #43d9c9cc;transform:scaleY(1.5)}.empty-player{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px}.empty-player svg{color:var(--teal);flex:none}.export-wrap{position:relative}.menu-popover{position:absolute;top:calc(100% + 8px);right:0;min-width:172px;padding:6px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel-2);box-shadow:var(--shadow);z-index:40}.menu-popover button{width:100%;display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:var(--radius-sm);color:var(--text-2);font-size:13px;text-align:left}.menu-popover button:hover{background:var(--ink-soft);color:var(--text)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;background:#06080cb3;display:grid;place-items:center;padding:18px}.modal{width:min(480px,100%);background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.modal-header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;padding:18px 18px 14px;border-bottom:1px solid var(--line-soft)}.modal-header h2{margin:0 0 4px;font-size:17px}.modal-header p{margin:0;color:var(--muted);font-size:12.5px}.modal-body{padding:16px 18px}.modal-body .field label{display:flex;align-items:center;gap:6px}.modal-body .field label svg{color:var(--teal)}.checkbox-label{display:flex!important;align-items:center;gap:8px;font-size:13px!important;color:var(--text)!important;cursor:pointer}.checkbox-label input[type=checkbox]{width:16px;height:16px;accent-color:var(--teal);flex:none}.modal-body input{width:100%;height:38px;padding:0 11px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--ink-soft);color:var(--text)}.modal-body input:focus{border-color:var(--teal)}.test-result{margin-top:10px;padding:9px 11px;border-radius:var(--radius-sm);font-size:12.5px}.test-ok{background:#7fd89a1a;border:1px solid #2d4f38;color:var(--green)}.test-fail{background:#ff6b6b14;border:1px solid #5a2b2b;color:#ff9d9d}.settings-note{margin:14px 0 0;font-size:11.5px;color:var(--muted)}.modal-footer{display:flex;justify-content:flex-end;gap:10px;padding:14px 18px 18px;border-top:1px solid var(--line-soft)}.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%);padding:10px 18px;border-radius:999px;background:var(--panel-2);border:1px solid #3d5570;color:var(--text);font-size:13px;box-shadow:var(--shadow);z-index:120;animation:toast-in .2s ease-out}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,8px)}}::-webkit-scrollbar{width:9px;height:9px}::-webkit-scrollbar-thumb{background:#2c3444;border-radius:999px;border:2px solid transparent;background-clip:content-box}::-webkit-scrollbar-track{background:transparent}@media(max-width:1180px){.workspace{grid-template-columns:224px minmax(0,1fr)}.side-column{display:none}}@media(max-width:760px){body{overflow:auto}.app-shell{height:auto;min-height:100vh}.topbar{position:sticky;top:0;height:54px;gap:10px;padding:0 12px}.brand{min-width:auto}.brand-text span,.title-meta{display:none}.topbar-actions .secondary-button{padding:0 10px}.workspace{display:block}.sidebar{position:sticky;top:54px;z-index:15;display:flex;gap:10px;align-items:center;overflow-x:auto;padding:10px 12px;border-right:none;border-bottom:1px solid var(--line)}.new-song-button{width:auto;flex:none;margin-bottom:0;padding:0 14px}.library-label{display:none}.song-list{flex-direction:row;overflow-x:auto}.song-card{min-width:180px;background:var(--ink-soft);border-color:var(--line-soft)}.library-empty{display:none}.main-column{padding:12px}.panel{padding:13px}.panel-heading{align-items:flex-start;flex-direction:column;gap:4px}.field-row{flex-direction:column;gap:0}.welcome-panel{grid-template-columns:1fr;gap:16px}.welcome-art{width:100%;height:auto;aspect-ratio:16 / 9}.welcome-copy h1{font-size:22px}.line-row{flex-wrap:wrap}.line-input{flex-basis:calc(100% - 34px)}.line-meta{margin-left:27px}.transport-row{flex-wrap:wrap;gap:10px}.tempo-control{flex-basis:100%}}