:root{--bg-primary: #000000;--bg-secondary: #0a0a0a;--bg-card: #000000;--text-primary: #ffffff;--text-secondary: #999999;--border-color: #1a1a1a;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .12);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .16);--accent-primary: #1a1a1a;--accent-hover: #333333;--accent-success: #1a1a1a;--overlay-bg: rgba(0, 0, 0, .6);--transition-speed: .3s;--player-bg: #000000;--player-border: #1a1a1a}@media (prefers-color-scheme: dark){:root{--bg-primary: #000000;--bg-secondary: #0a0a0a;--bg-card: #000000;--text-primary: #ffffff;--text-secondary: #999999;--border-color: #1a1a1a;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .4);--shadow-md: 0 4px 12px rgba(0, 0, 0, .5);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .6);--accent-primary: #1a1a1a;--accent-hover: #2a2a2a;--accent-success: #1a1a1a;--overlay-bg: rgba(0, 0, 0, .8);--player-bg: #000000;--player-border: #1a1a1a}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;touch-action:manipulation;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}#app{min-height:100vh;display:flex;flex-direction:column;padding-bottom:120px}.header{padding:1rem 1.5rem;background:#000;border-bottom:2px solid var(--border-color);display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:1rem;box-shadow:var(--shadow-sm)}.header-left{display:flex;justify-content:flex-start}.header-center{display:flex;align-items:center;justify-content:center;gap:.75rem}.header-logo{width:60px;height:60px;object-fit:contain;filter:drop-shadow(0 2px 4px rgba(0,0,0,.1))}.header-right{display:flex;justify-content:flex-end}.app-title{font-size:1.75rem;font-weight:800;color:var(--text-primary);letter-spacing:-.5px;background:linear-gradient(90deg,#fff,#f5f5f5);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.edit-btn{padding:.625rem 1.25rem;background:linear-gradient(90deg,#1a1a1a,#2a2a2a);color:#fff;border:none;border-radius:10px;font-size:.875rem;font-weight:600;cursor:pointer;transition:all var(--transition-speed) ease;box-shadow:var(--shadow-sm);min-height:44px}.edit-btn:hover{background:linear-gradient(90deg,#2a2a2a,#3a3a3a);box-shadow:var(--shadow-md);transform:translateY(-2px)}.edit-btn:active{transform:translateY(0);box-shadow:var(--shadow-sm)}.main-content{flex:1;padding:2rem 1rem;max-width:1400px;width:100%;margin:0 auto}.songs-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(2,1fr);gap:1.25rem;width:100%;aspect-ratio:2 / 1;min-height:450px}.song-card{background-color:var(--bg-card);border-radius:16px;box-shadow:var(--shadow-md);cursor:pointer;overflow:hidden;transition:all var(--transition-speed) cubic-bezier(.4,0,.2,1);position:relative;display:flex;align-items:center;justify-content:center;min-height:150px;background-size:cover;background-position:center;background-repeat:no-repeat;border:1px solid transparent}.song-card:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,#0000004d,#000000b3);z-index:1;transition:opacity var(--transition-speed) ease}.song-card:hover:before{opacity:.85}.song-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-6px) scale(1.02);border-color:var(--accent-primary)}.song-card:active{transform:translateY(-3px) scale(1.01);box-shadow:var(--shadow-md)}.song-card-title{position:relative;z-index:2;font-size:1.1rem;font-weight:700;text-align:center;padding:1.25rem;color:#fff;text-shadow:2px 2px 8px rgba(0,0,0,.9);word-wrap:break-word;overflow-wrap:break-word;-webkit-hyphens:auto;hyphens:auto;line-height:1.4}.song-card.empty{background:var(--bg-secondary);border:2px dashed var(--border-color);cursor:default}.song-card.empty:before{display:none}.song-card.empty .song-card-title{color:var(--text-secondary);text-shadow:none;font-weight:600}.song-card.empty:hover{transform:none;border-color:var(--border-color)}.music-player{position:fixed;bottom:0;left:0;right:0;background-color:var(--player-bg);border-top:2px solid var(--player-border);box-shadow:0 -4px 20px #00000026;z-index:1000;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:1.5rem 0}.player-content{display:flex;flex-direction:column;gap:1.25rem;padding:0 1.5rem;max-width:1400px;margin:0 auto}.player-top-row{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:1rem}.player-thumbnail{width:60px;height:60px;border-radius:10px;overflow:hidden;background-color:var(--bg-secondary);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-md);border:1px solid var(--border-color)}.player-thumbnail img{width:100%;height:100%;object-fit:cover}.player-info{display:flex;flex-direction:column;gap:.5rem;min-width:0}.player-song-title{font-size:1rem;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.player-progress-text{font-size:.875rem;color:var(--text-secondary);font-weight:500}.player-controls{display:flex;align-items:center;justify-content:center;gap:1rem}.player-btn{background:none;border:none;color:var(--text-primary);cursor:pointer;padding:.5rem;border-radius:50%;transition:all .2s ease;display:flex;align-items:center;justify-content:center;width:44px;height:44px}.player-btn svg{width:24px;height:24px}.player-btn:hover{background-color:var(--bg-secondary);transform:scale(1.1)}.player-btn:active{transform:scale(.95)}.player-btn-main{background:linear-gradient(135deg,#fff,#e6e6e6);color:#000;width:56px;height:56px;box-shadow:0 4px 12px #fff3}.player-btn-main svg{width:28px;height:28px}.player-btn-main:hover{background:linear-gradient(135deg,#fff,#f5f5f5);box-shadow:0 6px 16px #ffffff4d}.player-btn-small{width:40px;height:40px}.player-btn-small svg{width:20px;height:20px}.player-bottom-row{display:flex;align-items:center;gap:1.5rem}.player-progress-container{flex:1;display:flex;flex-direction:column;gap:.5rem}.player-volume{display:flex;align-items:center;gap:.75rem;min-width:140px}.volume-label{font-size:.75rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;font-weight:600;min-width:60px}.volume-slider{width:120px;height:6px;-webkit-appearance:none;-moz-appearance:none;appearance:none;background:var(--border-color);border-radius:3px;outline:none;cursor:pointer}.volume-slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:18px;height:18px;background:linear-gradient(135deg,#fff,#e6e6e6);border-radius:50%;cursor:pointer;transition:transform .2s ease;box-shadow:0 2px 6px #ffffff4d}.volume-slider::-webkit-slider-thumb:hover{transform:scale(1.3);box-shadow:0 3px 8px #fff6}.volume-slider::-moz-range-thumb{width:18px;height:18px;background:linear-gradient(135deg,#fff,#e6e6e6);border-radius:50%;cursor:pointer;border:none;transition:transform .2s ease;box-shadow:0 2px 6px #ffffff4d}.volume-slider::-moz-range-thumb:hover{transform:scale(1.3);box-shadow:0 3px 8px #fff6}.player-progress{position:relative;width:100%;height:6px;background-color:var(--border-color);border-radius:3px}.progress-slider{width:100%;height:6px;-webkit-appearance:none;-moz-appearance:none;appearance:none;background:transparent;outline:none;margin:0;cursor:pointer}.progress-slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:18px;height:18px;background:linear-gradient(135deg,#fff,#e6e6e6);border-radius:50%;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 6px #ffffff4d}.progress-slider::-webkit-slider-thumb:hover{transform:scale(1.3);box-shadow:0 3px 8px #fff6}.progress-slider::-moz-range-thumb{width:18px;height:18px;background:linear-gradient(135deg,#fff,#e6e6e6);border-radius:50%;cursor:pointer;border:none;transition:all .2s ease;box-shadow:0 2px 6px #ffffff4d}.progress-slider::-moz-range-thumb:hover{transform:scale(1.3);box-shadow:0 3px 8px #fff6}.progress-slider::-webkit-slider-runnable-track{height:6px;background:linear-gradient(to right,#ffffff 0%,#ffffff var(--progress, 0%),var(--border-color) var(--progress, 0%),var(--border-color) 100%);border-radius:3px}.progress-slider::-moz-range-track{height:6px;background:var(--border-color);border-radius:3px}.progress-slider::-moz-range-progress{height:6px;background:#fff;border-radius:3px}.modal{position:fixed;top:0;left:0;right:0;bottom:0;z-index:2000;display:none;align-items:center;justify-content:center;padding:1rem}.modal.active{display:flex}.modal-backdrop{position:absolute;top:0;left:0;right:0;bottom:0;background-color:var(--overlay-bg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.modal-content{position:relative;background-color:var(--bg-primary);border-radius:20px;box-shadow:var(--shadow-lg);max-width:650px;width:100%;max-height:90vh;overflow-y:auto;z-index:2001;animation:modalSlideIn var(--transition-speed) ease;border:1px solid var(--border-color)}@keyframes modalSlideIn{0%{opacity:0;transform:translateY(-30px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.modal-header{padding:1.5rem;border-bottom:2px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;background:var(--bg-secondary);border-radius:20px 20px 0 0}.modal-header h2{font-size:1.35rem;font-weight:700;color:var(--text-primary)}.close-btn{background:none;border:none;font-size:2rem;color:var(--text-secondary);cursor:pointer;padding:0;width:44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:10px;transition:all var(--transition-speed) ease}.close-btn:hover{background-color:var(--bg-primary);color:var(--text-primary);transform:rotate(90deg)}.edit-form{padding:1.5rem}.form-grid{display:flex;flex-direction:column;gap:1.5rem}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-size:.875rem;font-weight:600;color:var(--text-primary)}.form-group input{padding:.875rem;background-color:var(--bg-secondary);border:2px solid var(--border-color);border-radius:10px;color:var(--text-primary);font-size:1rem;transition:all var(--transition-speed) ease}.form-group input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #1a1a1a1a;background-color:var(--bg-primary)}.form-group input::placeholder{color:var(--text-secondary)}.song-inputs{display:flex;flex-direction:column;gap:.75rem;padding:1.25rem;background-color:var(--bg-secondary);border-radius:12px;border:1px solid var(--border-color)}.modal-actions{display:flex;gap:1rem;margin-top:2rem;justify-content:flex-end}.btn{padding:.875rem 1.75rem;border:none;border-radius:10px;font-size:.875rem;font-weight:600;cursor:pointer;transition:all var(--transition-speed) ease;min-height:44px;min-width:120px}.btn-primary{background-color:var(--accent-primary);color:#fff;box-shadow:var(--shadow-sm)}.btn-primary:hover{background-color:var(--accent-hover);box-shadow:var(--shadow-md);transform:translateY(-2px)}.btn-secondary{background-color:var(--bg-secondary);color:var(--text-primary);border:2px solid var(--border-color)}.btn-secondary:hover{background-color:var(--border-color)}.btn:active{transform:translateY(0)}@media (max-width: 1024px){.player-content{grid-template-columns:auto 1fr auto;gap:.75rem;padding:.75rem 1rem}.player-volume{display:none}.volume-slider{width:60px}}@media (max-width: 768px){.header{grid-template-columns:1fr;padding:1rem;text-align:center}.header-left,.header-right{display:none}.header-center{justify-content:center}.app-title{font-size:1.5rem}.edit-btn{position:fixed;top:.75rem;right:.75rem;z-index:100;padding:.5rem 1rem;font-size:.75rem}.songs-grid{grid-template-columns:repeat(2,1fr);grid-template-rows:repeat(4,1fr);aspect-ratio:1 / 2;min-height:700px;gap:1rem}.main-content{padding:1.5rem 1rem}.song-card-title{font-size:.95rem;padding:1rem}.player-content{grid-template-columns:auto 1fr auto;gap:.5rem;padding:.625rem 1rem}.player-thumbnail{width:42px;height:42px}.player-song-title{font-size:.8rem}.player-progress-text{font-size:.7rem}.player-btn{width:32px;height:32px}.player-btn svg{width:18px;height:18px}.player-btn-main{width:36px;height:36px}.player-btn-main svg{width:20px;height:20px}}@media (max-width: 480px){.modal-content{max-height:95vh;border-radius:16px}.modal-header{padding:1rem;border-radius:16px 16px 0 0}.modal-header h2{font-size:1.15rem}.edit-form,.song-inputs{padding:1rem}.modal-actions{flex-direction:column-reverse;margin-top:1.5rem}.btn{width:100%}.songs-grid{min-height:650px}}