:root{--primary: #3b82f6;--primary-dark: #1d4ed8;--bg-dark: #0f172a;--bg-card: #1e293b;--text-main: #f8fafc;--text-muted: #94a3b8;--accent: #10b981;--danger: #ef4444;--glass: rgba(30, 41, 59, .7)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,sans-serif;background-color:var(--bg-dark);color:var(--text-main);overflow-x:hidden;-webkit-tap-highlight-color:transparent}.container{padding:20px;max-width:500px;margin:0 auto}.card{background:var(--bg-card);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:16px;margin-bottom:20px;box-shadow:0 10px 15px -3px #0000004d;transition:transform .2s}.card:active{transform:scale(.98)}.card h3{font-size:1.1rem;margin-bottom:8px}.card p{color:var(--text-muted);font-size:.9rem}.player-container{display:flex;flex-direction:column;gap:12px}.vocal-button{background:var(--bg-dark);border:1px solid var(--primary);color:var(--text-main);padding:12px;border-radius:12px;text-align:left;display:flex;justify-content:space-between;align-items:center;cursor:pointer}.vocal-button.active{background:var(--primary)}.nav-bottom{position:fixed;bottom:0;left:0;right:0;background:var(--bg-card);height:65px;display:flex;justify-content:space-around;align-items:center;border-top:1px solid rgba(255,255,255,.1);z-index:1000}.nav-item{display:flex;flex-direction:column;align-items:center;color:var(--text-muted);text-decoration:none;font-size:.7rem}.nav-item.active{color:var(--primary)}