*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#f6f7fb;color:#111}
.container{max-width:980px;margin:0 auto;padding:16px}
.card{background:#fff;border-radius:12px;padding:16px;box-shadow:0 6px 18px rgba(0,0,0,.08);margin:12px 0}
.nav{display:flex;gap:12px;flex-wrap:wrap;margin:12px 0}
.nav a{color:#0b5bd3;text-decoration:none}
.nav a:hover{text-decoration:underline}
input,select,button{width:100%;padding:10px;border-radius:10px;border:1px solid #d9d9e3}
button{cursor:pointer;font-weight:700}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:700px){.row{grid-template-columns:1fr}}
.flash{padding:10px;border-radius:10px;margin:10px 0}
.flash.success{background:#e7f7ec;border:1px solid #bfe9cb}
.flash.error{background:#fde8e8;border:1px solid #f7b4b4}
.errors{background:#fff3cd;border:1px solid #ffeeba;padding:10px;border-radius:10px}
small.muted{color:#555}