*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#f5f5f5;color:#2c3e50}.header{background:#fff;border-bottom:1px solid #e0e0e0;padding:1rem}.container{max-width:800px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.logo{font-size:1.25rem;font-weight:700;color:#42b883;text-decoration:none}.nav{display:flex;align-items:center;gap:1rem}.nav-link{color:#2c3e50;text-decoration:none}.nav-link:hover{color:#42b883}.username{color:#666}.btn-logout{padding:.5rem 1rem;background:#f0f0f0;border:none;border-radius:4px;cursor:pointer}.btn-logout:hover{background:#e0e0e0}.main{min-height:calc(100vh - 60px)}