* {margin:0; padding:0; box-sizing:border-box; font-family:Arial, sans-serif;}
body {background:#f8f9fa; line-height:1.6;}
.container {max-width:1100px; margin:0 auto; padding:20px;}
header {background:#2c3e50; color:white; padding:1rem; margin-bottom:1rem; border-radius:4px;}
header h1 {margin-bottom:0.5rem;}
nav a {color:white; margin-right:15px; text-decoration:none;}
nav a:hover {text-decoration:underline;}
.btn {display:inline-block; padding:10px 20px; background:#27ae60; color:white; border-radius:4px; text-decoration:none; border:none; cursor:pointer;}
.btn:hover {background:#219653;}
.card {background:white; padding:20px; margin-bottom:20px; border-radius:5px; box-shadow:0 2px 5px rgba(0,0,0,0.1);}
input {width:100%; padding:10px; margin:8px 0; border:1px solid #ddd; border-radius:4px;}