:root{--bg-dark:#0f172a;--bg-card:#1e293b;--primary:#3b82f6;--primary-hover:#2563eb;--text-main:#f8fafc;--text-muted:#94a3b8;--success:#22c55e;--danger:#ef4444;--border:#334155;--radius:16px;--nav-height:70px}*{box-sizing:border-box}body{background-color:var(--bg-dark);color:var(--text-main);-webkit-font-smoothing:antialiased;padding:0;padding-bottom:calc(var(--nav-height) + 20px);margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}h1,h2,h3,h4,h5,h6{margin-top:0}.app-container{max-width:600px;min-height:100vh;margin:0 auto;padding:20px;position:relative}.title{color:var(--text-main);margin-bottom:20px;font-size:24px;font-weight:700}.subtitle{color:var(--text-muted);margin-bottom:12px;font-size:14px}.card{background-color:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px;padding:16px;transition:transform .2s,box-shadow .2s}.btn{background-color:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:12px;justify-content:center;align-items:center;gap:8px;width:100%;padding:14px 20px;font-size:16px;font-weight:600;transition:background-color .2s,transform .1s;display:inline-flex}.btn:active{transform:scale(.98)}.btn-success{background-color:var(--success)}.btn-danger{background-color:var(--danger)}.btn-outline{background-color:inherit;border:1px solid var(--border);color:var(--text-main)}.input-group{flex-direction:column;gap:4px;margin-bottom:12px;display:flex}.input-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;font-size:12px}.input-field{background-color:var(--bg-dark);border:1px solid var(--border);color:var(--text-main);border-radius:8px;outline:none;padding:12px;font-size:16px;transition:border-color .2s}.input-field:focus{border-color:var(--primary)}.bottom-nav{height:var(--nav-height);background-color:var(--bg-card);border-top:1px solid var(--border);z-index:100;justify-content:space-around;align-items:center;max-width:600px;margin:0 auto;display:flex;position:fixed;bottom:0;left:0;right:0}.nav-item{color:var(--text-muted);flex-direction:column;flex:1;align-items:center;gap:4px;padding:10px 0;font-size:12px;text-decoration:none;display:flex}.nav-item.active{color:var(--primary)}