.melody-v4.app-page .sep-dropzone{border:2px dashed color-mix(in srgb,var(--accent)32%,transparent);border-radius:var(--radius-lg);background:color-mix(in srgb,var(--accent)8%,transparent);text-align:center;padding:44px 24px;transition:border-color .15s,background .15s}.melody-v4.app-page .sep-dropzone:not(.disabled){cursor:pointer}.melody-v4.app-page .sep-dropzone:not(.disabled):hover{border-color:var(--accent)}.melody-v4.app-page .sep-dropzone.disabled{opacity:.6;cursor:not-allowed}.melody-v4.app-page .sep-dropzone .drop-icon{border-radius:var(--radius-md);background:var(--surface-solid);width:72px;height:72px;color:var(--accent-ink);place-items:center;margin:0 auto 12px;display:grid}.melody-v4.app-page .stem-card{border-radius:var(--radius-sm);border:1.5px solid color-mix(in srgb,var(--accent)22%,transparent);background:var(--surface);align-items:center;gap:12px;padding:16px;display:flex}.melody-v4.app-page .stem-card.on{border-color:color-mix(in srgb,var(--accent)45%,transparent);background:color-mix(in srgb,var(--accent)10%,transparent)}.melody-v4.app-page .stem-card .stem-ic{border-radius:var(--radius-sm);flex:none;place-items:center;width:40px;height:40px;display:grid}.melody-v4.app-page .lib-grid{grid-template-columns:repeat(3,1fr);gap:20px;display:grid}@media (max-width:1023px){.melody-v4.app-page .lib-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:639px){.melody-v4.app-page .lib-grid{grid-template-columns:1fr}}.melody-v4.app-page .cover{place-items:center;height:96px;display:grid;position:relative}.melody-v4.app-page .cover .msi{color:var(--primary-ink);font-size:40px}.melody-v4.app-page .cover .type-badge{position:absolute;top:10px;left:10px}.melody-v4.app-page .cover .dur{color:#fff;background:#0000008c;border-radius:999px;padding:2px 7px;font-size:11px;font-weight:700;position:absolute;bottom:8px;right:10px}.melody-v4.app-page .act-btn{border-radius:var(--radius-sm);background:var(--surface-3);width:34px;height:34px;color:var(--text-soft);cursor:pointer;border:none;place-items:center;transition:all .15s;display:grid}.melody-v4.app-page .act-btn:hover{background:color-mix(in srgb,var(--primary)14%,transparent);color:var(--primary-ink)}.melody-v4.app-page .act-btn.danger:hover{background:color-mix(in srgb,var(--danger)14%,transparent);color:var(--danger-ink)}.melody-v4.app-page .act-btn:disabled{opacity:.5;cursor:not-allowed}.melody-v4.app-page .ex-chip{border:1.5px solid color-mix(in srgb,var(--accent)30%,transparent);background:color-mix(in srgb,var(--accent)8%,transparent);color:var(--accent-ink);cursor:pointer;border-radius:999px;align-items:center;gap:6px;padding:7px 14px;font-size:13px;font-weight:600;transition:all .15s;display:inline-flex}.melody-v4.app-page .ex-chip:hover{border-color:var(--accent);background:color-mix(in srgb,var(--accent)14%,transparent)}.melody-v4.app-page .ex-chip:disabled{opacity:.5;cursor:not-allowed}.melody-v4.app-page .queue-item{grid-template-columns:auto 1fr auto;align-items:center;gap:16px;display:grid}@media (max-width:639px){.melody-v4.app-page .queue-item{grid-template-columns:1fr}}@keyframes ai-studio-spin{to{transform:rotate(360deg)}}.melody-v4.app-page .spin{animation:1s linear infinite ai-studio-spin}.melody-v4.app-page .tabs{border-bottom:2px solid var(--line);gap:4px;margin-bottom:24px;display:flex;overflow-x:auto}.melody-v4.app-page .tabs a,.melody-v4.app-page .tabs button{color:var(--text-soft);white-space:nowrap;background:0 0;border-bottom:2.5px solid #0000;align-items:center;gap:8px;margin-bottom:-2px;padding:10px 18px;font-size:14px;font-weight:600;display:inline-flex}.melody-v4.app-page .tabs a:hover,.melody-v4.app-page .tabs button:hover{color:var(--text)}.melody-v4.app-page .tabs .active{color:var(--primary-ink);border-bottom-color:var(--primary)}.melody-v4.app-page .waveform{align-items:center;gap:2px;height:56px;display:flex}.melody-v4.app-page .waveform i{border-radius:calc(var(--radius-sm)/6);background:var(--line-strong);flex:1;min-height:12%}.melody-v4.app-page .waveform i.played{background:linear-gradient(180deg,var(--primary-2),var(--primary))}