:root{color-scheme:dark;--bg-primary: #050d1f;--bg-secondary: #0c1731;--bg-tertiary: #16244b;--bg-hover: #1f2f61;--border: #1f2b4b;--border-light: #2f3f6f;--text-primary: #e4f1ff;--text-secondary: #9bb4f0;--text-muted: #6c7ca7;--accent: #2f9dff;--accent-hover: #1f6fdd;--accent-subtle: rgba(47, 157, 255, .2);--success: #44dfb0;--error: #ff6b81;--warning: #f4c069;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--shadow: 0 18px 45px rgba(5, 9, 31, .6), 0 8px 24px rgba(5, 9, 31, .4)}:root[data-theme=dark]{color-scheme:dark}:root[data-theme=light]{color-scheme:light;--bg-primary: #f2f8ff;--bg-secondary: #ffffff;--bg-tertiary: #e4efff;--bg-hover: #d5e6ff;--border: #c0d6f6;--border-light: #9ebcf0;--text-primary: #152039;--text-secondary: #2e3c59;--text-muted: #5a6c93;--accent: #1d6dff;--accent-hover: #1550d4;--accent-subtle: rgba(29, 109, 255, .18);--success: #179b7a;--error: #e64060;--warning: #c2872d;--shadow: 0 20px 40px rgba(13, 25, 54, .12), 0 8px 20px rgba(13, 25, 54, .08)}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh}.container{max-width:900px;margin:0 auto;padding:0 24px}header{display:flex;align-items:center;justify-content:space-between;padding:20px 0;border-bottom:1px solid var(--border);margin-bottom:40px;gap:16px}.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--text-primary)}.logo svg{color:var(--accent)}nav{display:flex;gap:8px;flex-wrap:wrap}.header-controls{display:flex;align-items:center;gap:16px}@media(max-width:800px){header{flex-direction:column;align-items:flex-start}.header-controls{flex-direction:column;align-items:flex-start;width:100%}nav{width:100%}}.theme-toggle{display:inline-flex;gap:4px;padding:4px;border-radius:var(--radius-md);border:1px solid var(--border);background:var(--bg-secondary)}.theme-btn{border:none;background:transparent;color:var(--text-secondary);font-size:.8125rem;font-weight:600;padding:6px 12px;border-radius:var(--radius-sm);cursor:pointer;transition:color .15s ease,background .15s ease}.theme-btn:hover,.theme-btn:focus-visible{color:var(--text-primary);background:var(--bg-tertiary)}.theme-btn.active{background:var(--accent-subtle);color:var(--accent)}.nav-link{color:var(--text-secondary);text-decoration:none;padding:8px 16px;border-radius:var(--radius-md);font-size:.875rem;font-weight:500;transition:all .15s ease}.nav-link:hover,.nav-link.active{color:var(--text-primary);background:var(--bg-tertiary)}main{padding-bottom:60px}.view{display:none}.view.active{display:block}.view-header{margin-bottom:32px}.view-header h1{font-size:1.875rem;font-weight:700;margin-bottom:8px}.subtitle{color:var(--text-secondary);font-size:1rem}.tabs{display:flex;gap:4px;margin-bottom:24px;background:var(--bg-secondary);padding:4px;border-radius:var(--radius-md);width:fit-content}.tab{background:transparent;border:none;color:var(--text-secondary);padding:8px 16px;border-radius:var(--radius-sm);font-size:.875rem;font-weight:500;cursor:pointer;transition:all .15s ease}.tab:hover{color:var(--text-primary)}.tab.active{background:var(--bg-tertiary);color:var(--text-primary)}.tab-content{display:none}.tab-content.active{display:block}.form-card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;margin-bottom:24px}.form-group{margin-bottom:20px}.form-group:last-child{margin-bottom:0}.form-group label{display:block;font-size:.875rem;font-weight:500;color:var(--text-secondary);margin-bottom:8px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media(max-width:600px){.form-row{grid-template-columns:1fr}}input[type=text],input[type=number],textarea{width:100%;background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-md);padding:12px 14px;font-size:.9375rem;color:var(--text-primary);font-family:inherit;transition:border-color .15s ease,box-shadow .15s ease}input::placeholder,textarea::placeholder{color:var(--text-muted)}input:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-subtle)}textarea{resize:vertical;min-height:120px}.checkbox-group label{display:flex;align-items:center;gap:10px;cursor:pointer}.checkbox-group input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent)}.checkbox-group span{font-size:.875rem;color:var(--text-secondary)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;font-size:.9375rem;font-weight:500;border-radius:var(--radius-md);border:none;cursor:pointer;transition:all .15s ease;font-family:inherit}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{background:var(--bg-hover)}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover{color:var(--text-primary);background:var(--bg-tertiary)}.btn-lg{padding:14px 28px;font-size:1rem}.btn:disabled{opacity:.5;cursor:not-allowed}.challenge-section{background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;margin:24px 0}.challenge-header{margin-bottom:16px}.challenge-header h3{font-size:1rem;font-weight:600;margin-bottom:4px}.challenge-controls{display:flex;gap:8px;flex-wrap:wrap}.challenge-status{margin-top:12px;font-size:.875rem;color:var(--text-secondary)}.challenge-status.success{color:var(--success)}.challenge-status.error{color:var(--error)}.challenge-status.working{color:var(--warning)}.results-container{margin-top:24px}.result-card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;margin-bottom:16px;cursor:pointer;transition:all .15s ease}.result-card:hover{border-color:var(--border-light);background:var(--bg-tertiary)}.result-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px}.result-title{font-size:1.125rem;font-weight:600;margin-bottom:4px}.result-artist{color:var(--text-secondary);font-size:.9375rem}.result-meta{display:flex;gap:12px;flex-wrap:wrap}.result-badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:9999px;font-size:.75rem;font-weight:500;background:var(--bg-primary);color:var(--text-secondary)}.result-badge.synced{background:var(--accent-subtle);color:var(--accent)}.result-badge.instrumental{background:#eab3081a;color:var(--warning)}.result-album{font-size:.875rem;color:var(--text-muted)}.lyrics-display{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}.lyrics-header{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:20px;border-bottom:1px solid var(--border)}.lyrics-header .track-summary{flex:1 1 240px}.lyrics-header h2{font-size:1.25rem;font-weight:600;margin-bottom:4px}.lyrics-header p{color:var(--text-secondary)}.lyrics-actions{display:flex;align-items:flex-start;gap:8px}.btn-copy{padding:10px 14px;font-size:.8125rem;border:1px solid var(--border);background:var(--bg-tertiary);color:var(--text-primary);border-radius:var(--radius-md);cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:all .15s ease}.btn-copy:hover{border-color:var(--accent);color:var(--accent)}.btn-copy.success{color:var(--success);border-color:var(--success)}.lyrics-tabs{display:flex;border-bottom:1px solid var(--border)}.lyrics-tab{flex:1;padding:12px;text-align:center;background:transparent;border:none;color:var(--text-secondary);font-size:.875rem;font-weight:500;cursor:pointer;transition:all .15s ease}.lyrics-tab:hover{color:var(--text-primary);background:var(--bg-tertiary)}.lyrics-tab.active{color:var(--accent);background:var(--bg-tertiary)}.lyrics-content{padding:20px;max-height:500px;overflow-y:auto}.lyrics-content pre{font-family:Inter,sans-serif;font-size:.9375rem;line-height:1.8;white-space:pre-wrap;word-wrap:break-word;color:var(--text-primary)}.lyrics-content .synced-line{display:flex;gap:16px}.lyrics-content .timestamp{color:var(--accent);font-family:ui-monospace,SFMono-Regular,SF Mono,Menlo,monospace;font-size:.8125rem;min-width:70px}.message{padding:16px 20px;border-radius:var(--radius-md);margin-bottom:16px;font-size:.9375rem}.message.error{background:#ef44441a;border:1px solid rgba(239,68,68,.2);color:var(--error)}.message.success{background:#22c55e1a;border:1px solid rgba(34,197,94,.2);color:var(--success)}.message.info{background:var(--accent-subtle);border:1px solid rgba(59,130,246,.2);color:var(--accent)}.muted{color:var(--text-muted);font-size:.875rem}.loading{display:flex;align-items:center;justify-content:center;gap:12px;padding:40px;color:var(--text-secondary)}.spinner{width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}footer{padding:24px 0;border-top:1px solid var(--border);text-align:center;color:var(--text-muted);font-size:.875rem}footer a{color:var(--accent);text-decoration:none}footer a:hover{text-decoration:underline}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}