:root{--bg-base:#0a0c10;--bg-surface:#12151c;--bg-card:#1a1f2cb3;--bg-card-hover:#242b3de6;--bg-glass:#12151cbf;--accent-primary:#1ed760;--accent-primary-hover:#1fdf64;--accent-glow:#1ed76059;--accent-purple:#9d4edd;--accent-cyan:#00b4d8;--text-primary:#fff;--text-secondary:#a0a6b5;--text-muted:#646b7c;--border-subtle:#ffffff14;--border-focus:#1ed76080;--sidebar-width:260px;--player-height:90px;--radius-sm:8px;--radius-md:12px;--radius-lg:20px;--radius-full:9999px;--font-family:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--transition-fast:.15s ease;--transition-normal:.25s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}body{background-color:var(--bg-base);color:var(--text-primary);font-family:var(--font-family);-webkit-user-select:none;user-select:none;width:100vw;height:100vh;overflow:hidden}#app{flex-direction:column;width:100vw;height:100vh;display:flex;position:relative}.app-layout{height:calc(100vh - var(--player-height));flex:1;display:flex;overflow:hidden}.sidebar{width:var(--sidebar-width);background-color:var(--bg-surface);border-right:1px solid var(--border-subtle);z-index:10;flex-direction:column;gap:24px;padding:24px 16px;display:flex}.brand-header{align-items:center;gap:12px;padding:0 8px;display:flex}.brand-icon{background:linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));border-radius:var(--radius-md);width:36px;height:36px;box-shadow:0 4px 16px var(--accent-glow);justify-content:center;align-items:center;display:flex}.brand-title{letter-spacing:-.02em;background:linear-gradient(90deg,#fff,#a0a6b5);-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:1.25rem;font-weight:700}.nav-section{flex-direction:column;gap:6px;display:flex}.nav-title{text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:4px;padding:0 12px;font-size:.75rem;font-weight:600}.nav-item{border-radius:var(--radius-sm);color:var(--text-secondary);transition:all var(--transition-fast);cursor:pointer;align-items:center;gap:12px;padding:10px 14px;font-size:.9rem;font-weight:500;text-decoration:none;display:flex}.nav-item:hover{color:var(--text-primary);background:var(--bg-card)}.nav-item.active{color:var(--accent-primary);background:#1ed7601a;font-weight:600}.accounts-widget{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);flex-direction:column;gap:10px;margin-top:auto;padding:14px;display:flex}.widget-header{color:var(--text-secondary);justify-content:space-between;align-items:center;font-size:.8rem;font-weight:600;display:flex}.account-pill{color:var(--text-primary);align-items:center;gap:8px;font-size:.8rem;display:flex}.account-avatar{background:var(--accent-purple);border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;font-size:.7rem;font-weight:700;display:flex;overflow:hidden}.btn-add-account{border:1px solid var(--border-subtle);width:100%;color:var(--text-primary);border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition-fast);background:#ffffff0f;justify-content:center;align-items:center;gap:6px;padding:8px 12px;font-size:.8rem;font-weight:600;display:flex}.btn-add-account:hover{background:#ffffff1f}.main-view{background:linear-gradient(180deg, #161b26 0%, var(--bg-base) 280px);flex-direction:column;flex:1;display:flex;position:relative;overflow-y:auto}.top-nav{background:var(--bg-glass);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);z-index:5;border-bottom:1px solid var(--border-subtle);justify-content:space-between;align-items:center;height:70px;padding:0 32px;display:flex;position:sticky;top:0}.search-box{border:1px solid var(--border-subtle);border-radius:var(--radius-full);width:320px;transition:all var(--transition-fast);background:#ffffff12;align-items:center;gap:10px;padding:8px 18px;display:flex}.search-box:focus-within{border-color:var(--accent-primary);box-shadow:0 0 12px var(--accent-glow);background:#ffffff1a}.search-input{color:var(--text-primary);background:0 0;border:none;outline:none;width:100%;font-size:.9rem}.search-input::placeholder{color:var(--text-muted)}.top-actions{align-items:center;gap:12px;display:flex}.btn-primary{background:var(--accent-primary);color:#000;border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-fast);box-shadow:0 4px 16px var(--accent-glow);border:none;align-items:center;gap:8px;padding:10px 22px;font-size:.88rem;font-weight:700;display:flex}.btn-primary:hover{background:var(--accent-primary-hover);transform:scale(1.03)}.btn-secondary{color:var(--text-primary);border:1px solid var(--border-subtle);border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-fast);background:#ffffff14;align-items:center;gap:8px;padding:10px 18px;font-size:.88rem;font-weight:600;display:flex}.btn-secondary:hover{background:#ffffff26}.banner{border-radius:var(--radius-md);background:linear-gradient(135deg,#1ed76026,#00b4d826);border:1px solid #1ed7604d;justify-content:space-between;align-items:center;margin:24px 32px 0;padding:16px 20px;display:flex}.banner-content{align-items:center;gap:14px;display:flex}.banner-title{color:var(--text-primary);font-size:.95rem;font-weight:700}.banner-desc{color:var(--text-secondary);font-size:.82rem}.content-body{flex-direction:column;gap:20px;padding:28px 32px;display:flex}.section-header{justify-content:space-between;align-items:center;display:flex}.section-title{letter-spacing:-.02em;font-size:1.5rem;font-weight:700}.filter-chips{gap:8px;display:flex}.chip{border-radius:var(--radius-full);border:1px solid var(--border-subtle);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast);background:#ffffff0f;padding:6px 14px;font-size:.8rem;font-weight:600}.chip:hover{color:var(--text-primary);background:#ffffff1f}.chip.active{background:var(--text-primary);color:#000;border-color:var(--text-primary)}.tracks-container{flex-direction:column;gap:4px;display:flex}.track-row-header{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--border-subtle);grid-template-columns:48px 4fr 3fr 2fr 48px 80px;padding:8px 16px;font-size:.75rem;font-weight:600;display:grid}.track-row{border-radius:var(--radius-sm);color:var(--text-secondary);transition:all var(--transition-fast);cursor:pointer;grid-template-columns:48px 4fr 3fr 2fr 48px 80px;align-items:center;padding:10px 16px;font-size:.88rem;display:grid}.track-row:hover{background:var(--bg-card-hover);color:var(--text-primary)}.track-row.playing{color:var(--accent-primary);background:#1ed76014}.track-num{width:24px;color:var(--text-muted);justify-content:center;align-items:center;font-size:.85rem;display:flex}.track-title-cell{align-items:center;gap:14px;display:flex;overflow:hidden}.track-thumb{object-fit:cover;background:#ffffff0f;border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;width:42px;height:42px;display:flex;overflow:hidden}.track-info{flex-direction:column;display:flex;overflow:hidden}.track-name{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-weight:600;overflow:hidden}.track-row.playing .track-name{color:var(--accent-primary)}.track-artist-sub{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;font-size:.8rem;overflow:hidden}.track-album-cell,.track-source-cell{white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.source-badge{border-radius:var(--radius-full);background:#ffffff0f;align-items:center;gap:4px;padding:2px 8px;font-size:.72rem;font-weight:600;display:inline-flex}.source-badge.drive{color:#4285f4;border:1px solid #4285f44d}.source-badge.demo{color:#f7b731;border:1px solid #f7b7314d}.fav-btn{color:var(--text-muted);cursor:pointer;transition:color var(--transition-fast);background:0 0;border:none;justify-content:center;align-items:center;display:flex}.fav-btn:hover,.fav-btn.active{color:#e63946}.player-bar{height:var(--player-height);background:var(--bg-surface);border-top:1px solid var(--border-subtle);z-index:20;grid-template-columns:1fr 2fr 1fr;align-items:center;padding:0 24px;display:grid}.player-track-info{align-items:center;gap:14px;min-width:0;display:flex}.player-thumb{border-radius:var(--radius-sm);object-fit:cover;background:#ffffff0f;flex-shrink:0;justify-content:center;align-items:center;width:56px;height:56px;display:flex}.player-meta{flex-direction:column;min-width:0;display:flex}.player-title{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:.92rem;font-weight:600;overflow:hidden}.player-artist{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;font-size:.78rem;overflow:hidden}.player-center{flex-direction:column;align-items:center;gap:8px;display:flex}.player-controls{align-items:center;gap:20px;display:flex}.btn-icon{color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast);background:0 0;border:none;justify-content:center;align-items:center;display:flex}.btn-icon:hover{color:var(--text-primary);transform:scale(1.1)}.btn-icon.active{color:var(--accent-primary)}.btn-play-pause{background:var(--text-primary);color:#000;cursor:pointer;width:40px;height:40px;transition:all var(--transition-fast);border:none;border-radius:50%;justify-content:center;align-items:center;display:flex;box-shadow:0 4px 12px #fff3}.btn-play-pause:hover{background:#fff;transform:scale(1.08)}.player-progress-bar{align-items:center;gap:12px;width:100%;max-width:540px;display:flex}.time-label{color:var(--text-muted);text-align:center;font-variant-numeric:tabular-nums;width:38px;font-size:.75rem}.custom-slider{appearance:none;border-radius:var(--radius-full);cursor:pointer;height:4px;transition:height var(--transition-fast);background:#ffffff26;outline:none;flex:1}.custom-slider:hover{height:6px}.custom-slider::-webkit-slider-thumb{appearance:none;cursor:pointer;opacity:0;width:12px;height:12px;transition:opacity var(--transition-fast);background:#fff;border-radius:50%;box-shadow:0 0 6px #0009}.custom-slider:hover::-webkit-slider-thumb{opacity:1}.player-right{justify-content:flex-end;align-items:center;gap:12px;display:flex}.volume-slider{width:100px}.modal-overlay{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:100;opacity:0;pointer-events:none;transition:opacity var(--transition-normal);background:#000000bf;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-overlay.active{opacity:1;pointer-events:auto}.modal-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);flex-direction:column;width:90%;max-width:580px;max-height:85vh;display:flex;overflow:hidden;box-shadow:0 24px 48px #000c}.modal-header{border-bottom:1px solid var(--border-subtle);justify-content:space-between;align-items:center;padding:20px 24px;display:flex}.modal-title{font-size:1.15rem;font-weight:700}.modal-body{flex-direction:column;gap:20px;padding:24px;display:flex;overflow-y:auto}.account-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);flex-direction:column;gap:12px;padding:16px;display:flex}.account-card-header{justify-content:space-between;align-items:center;display:flex}.account-card-meta{align-items:center;gap:12px;display:flex}.storage-bar-wrapper{flex-direction:column;gap:4px;display:flex}.storage-bar{border-radius:var(--radius-full);background:#ffffff1a;height:6px;overflow:hidden}.storage-fill{background:linear-gradient(90deg, var(--accent-primary), var(--accent-cyan));height:100%}.storage-label{color:var(--text-muted);justify-content:space-between;font-size:.75rem;display:flex}.folder-item{border-radius:var(--radius-sm);border:1px solid var(--border-subtle);cursor:pointer;transition:all var(--transition-fast);background:#ffffff0a;justify-content:space-between;align-items:center;padding:10px 14px;display:flex}.folder-item:hover{background:#ffffff14}.folder-item.selected{border-color:var(--accent-primary);background:#1ed7601a}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.spin{animation:1s linear infinite spin}@media (width<=768px){.sidebar{display:none}.track-row-header,.track-row{grid-template-columns:36px 1fr 36px 60px}.track-album-cell,.track-source-cell{display:none}.player-bar{grid-template-columns:1fr 1fr;padding:0 16px}.player-right{display:none}.input-group{flex-direction:column;gap:6px;display:flex}.input-label{color:var(--text-secondary);font-size:.82rem;font-weight:600}.input-field{border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-primary);transition:all var(--transition-fast);background:#ffffff0f;outline:none;padding:10px 14px;font-size:.9rem}.input-field:focus{border-color:red;box-shadow:0 0 10px #ff00004d}.btn-youtube{color:#fff;border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-fast);background:red;border:none;align-items:center;gap:8px;padding:10px 20px;font-size:.88rem;font-weight:700;display:flex;box-shadow:0 4px 14px #ff000059}.btn-youtube:hover{background:#e60000;transform:scale(1.03)}.download-result-card{border:1px solid var(--border-subtle);border-radius:var(--radius-md);background:#ffffff0d;align-items:center;gap:16px;padding:14px;display:flex}.btn-download-device{color:var(--text-muted);cursor:pointer;transition:all var(--transition-fast);background:0 0;border:none;justify-content:center;align-items:center;display:flex}.btn-download-device:hover{color:var(--accent-primary);transform:scale(1.15)}.track-row-header,.track-row{grid-template-columns:48px 4fr 3fr 2fr 48px 48px 70px;display:grid}.login-overlay{z-index:9999;background:radial-gradient(circle at 50% 20%,#1ed76026,#0000 65%),linear-gradient(#0d1117 0%,#06080a 100%);justify-content:center;align-items:center;padding:20px;animation:.3s ease-out fadeIn;display:flex;position:fixed;inset:0}.login-card{-webkit-backdrop-filter:blur(24px);background:#121826bf;border:1px solid #ffffff1a;border-radius:24px;flex-direction:column;gap:24px;width:100%;max-width:440px;padding:40px 36px;animation:.35s cubic-bezier(.16,1,.3,1) slideUp;display:flex;box-shadow:0 20px 50px #0009,0 0 40px #1ed7601a}.login-header{text-align:center;flex-direction:column;align-items:center;gap:12px;display:flex}.login-brand-icon{background:linear-gradient(135deg, var(--accent-primary) 0%, #00b4d8 100%);width:60px;height:60px;box-shadow:0 8px 24px var(--accent-glow);border-radius:18px;justify-content:center;align-items:center;display:flex}.login-brand-icon svg{color:#000}.login-title{letter-spacing:-.5px;color:#fff;font-size:1.6rem;font-weight:800}.login-subtitle{color:var(--text-secondary);font-size:.88rem;line-height:1.4}.login-form{flex-direction:column;gap:18px;display:flex}.login-field{flex-direction:column;gap:6px;display:flex}.login-label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;font-size:.82rem;font-weight:600}.login-input-wrap{align-items:center;display:flex;position:relative}.login-input-icon{color:var(--text-muted);pointer-events:none;align-items:center;display:flex;position:absolute;left:14px}.login-input{border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:#fff;width:100%;transition:all var(--transition-fast);background:#ffffff0d;padding:14px 44px 14px 42px;font-family:inherit;font-size:.95rem}.login-input:focus{border-color:var(--accent-primary);background:#ffffff14;outline:none;box-shadow:0 0 0 3px #1ed76033}.login-toggle-password{color:var(--text-muted);cursor:pointer;transition:color var(--transition-fast);background:0 0;border:none;justify-content:center;align-items:center;padding:6px;display:flex;position:absolute;right:12px}.login-toggle-password:hover{color:#fff}.login-error{border-radius:var(--radius-sm);color:#ff6b6b;background:#ff44441f;border:1px solid #ff444459;align-items:center;gap:10px;padding:10px 14px;font-size:.85rem;display:flex}.login-btn-submit{background:var(--accent-primary);color:#000;border-radius:var(--radius-full);cursor:pointer;width:100%;transition:all var(--transition-fast);box-shadow:0 6px 20px var(--accent-glow);border:none;justify-content:center;align-items:center;gap:10px;margin-top:8px;padding:14px;font-size:.98rem;font-weight:700;display:flex}.login-btn-submit:hover{background:var(--accent-primary-hover);transform:translateY(-2px);box-shadow:0 8px 25px #1ed76073}.login-btn-submit:active{transform:translateY(0)}.login-footer-info{text-align:center;color:var(--text-muted);border-top:1px solid var(--border-subtle);padding-top:16px;font-size:.78rem}.header-user-badge{border:1px solid var(--border-subtle);border-radius:var(--radius-full);color:var(--text-primary);background:#ffffff0f;align-items:center;gap:10px;padding:6px 14px;font-size:.85rem;font-weight:600;display:flex}.btn-logout{color:var(--text-muted);cursor:pointer;transition:all var(--transition-fast);background:0 0;border:none;border-radius:50%;align-items:center;padding:4px;display:flex}.btn-logout:hover{color:#f55;background:#ff555526}.local-storage-banner{border-radius:var(--radius-lg);background:linear-gradient(135deg,#1e90ff26 0%,#121826d9 100%);border:1px solid #1e90ff40;flex-direction:column;gap:16px;margin-bottom:24px;padding:24px;display:flex;box-shadow:0 10px 30px #0000004d}.local-storage-header{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.local-storage-path-box{align-items:center;gap:10px;width:100%;display:flex}.local-path-input{border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:#fff;background:#00000059;flex:1;padding:10px 14px;font-family:monospace;font-size:.9rem}.local-path-input:focus{border-color:#00b4d8;outline:none;box-shadow:0 0 0 2px #00b4d840}.btn-save-path{border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:#fff;cursor:pointer;transition:all var(--transition-fast);background:#ffffff1a;padding:10px 18px;font-size:.85rem;font-weight:600}.btn-save-path:hover{background:#fff3}.btn-scan-local{color:#fff;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);background:linear-gradient(135deg,#00b4d8 0%,#0077b6 100%);border:none;align-items:center;gap:8px;padding:10px 20px;font-size:.88rem;font-weight:700;display:flex;box-shadow:0 4px 14px #00b4d859}.btn-scan-local:hover{transform:translateY(-2px);box-shadow:0 6px 20px #00b4d880}.btn-scan-local:disabled{opacity:.6;cursor:not-allowed;transform:none}.stats-pills{flex-wrap:wrap;gap:12px;display:flex}.stats-pill{border:1px solid var(--border-subtle);border-radius:var(--radius-full);color:var(--text-secondary);background:#ffffff0d;align-items:center;gap:6px;padding:6px 14px;font-size:.8rem;display:flex}.stats-pill strong{color:#fff}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)scale(.96)}to{opacity:1;transform:translateY(0)scale(1)}}}