body{font-family:Inter,system-ui,Arial,sans-serif;background:#f5f7fb;color:#1f2937;margin:0}
.container{max-width:900px;margin:24px auto;padding:0 16px}
.header{background:linear-gradient(90deg,#0ea5a5,#06b6d4);color:white;padding:12px 0}
.brand{margin:0;font-size:24px}
.brand a{color:white;text-decoration:none}
nav{float:right}
nav a{color:rgba(255,255,255,0.9);margin-left:12px;text-decoration:none}
.main{padding:24px}
h2{color:#0f172a}
form label{display:block;margin:8px 0}
button{background:#0ea5a5;color:white;border:none;padding:8px 12px;border-radius:6px}
.messages{background:#fee2e2;padding:8px;border-left:4px solid #f87171}
.footer{background:#fff;padding:12px;border-top:1px solid #e6eef6;text-align:center;margin-top:24px}