/* d2d-vpn-admin — minimal CSS */
* { box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
       "Helvetica Neue", Arial, sans-serif; line-height: 1.4;
       margin: 0; color: #222; background: #f7f7f7; }

header { background: #2c3e50; color: #fff; padding: 12px 24px;
         display: flex; justify-content: space-between; align-items: center; }
header h1 { margin: 0; font-size: 18px; font-weight: 500; }
header h1 a, header h1 a:visited { color: #fff; text-decoration: none; }
header nav { display: flex; gap: 12px; align-items: center; }
header button { background: transparent; color: #fff; border: 1px solid #fff;
                padding: 4px 12px; border-radius: 3px; cursor: pointer; }

main { max-width: 1100px; margin: 24px auto; padding: 0 24px; }
footer { text-align: center; color: #888; padding: 24px; }

.alert { padding: 12px 16px; border-radius: 4px; margin-bottom: 16px; }
.alert-info { background: #e3f2fd; border: 1px solid #90caf9; color: #0d47a1; }
.alert-error { background: #ffebee; border: 1px solid #ef9a9a; color: #b71c1c; }
.alert-warning { background: #fff8e1; border: 1px solid #ffe082; color: #6d4c00; }

.warning { background: #fff3cd; border-left: 4px solid #ffa000;
           padding: 12px 16px; margin: 16px 0; }

.btn { display: inline-block; padding: 8px 16px; border-radius: 4px;
       border: 1px solid #ccc; background: #fff; cursor: pointer;
       text-decoration: none; color: #222; font-size: 14px; }
.btn-primary { background: #1976d2; color: #fff; border-color: #1565c0; }
.btn-primary:hover { background: #1565c0; }
.btn-danger { background: #d32f2f; color: #fff; border-color: #c62828; }
.btn-small { padding: 4px 10px; font-size: 12px; }

table { width: 100%; border-collapse: collapse; background: #fff;
        border: 1px solid #ddd; }
th, td { padding: 8px 12px; text-align: left; border-bottom: 1px solid #eee; }
th { background: #f0f0f0; font-weight: 600; font-size: 13px; }

dl.instance-meta { display: grid; grid-template-columns: 160px 1fr;
                   gap: 4px 16px; margin: 16px 0; }
dl.instance-meta dt { font-weight: 600; color: #555; }
dl.instance-meta dd { margin: 0; }

.card-form { background: #fff; padding: 24px; border: 1px solid #ddd;
             border-radius: 6px; max-width: 540px; }
.card-form label { display: block; margin-bottom: 16px; }
.card-form label span { display: block; font-weight: 600; margin-bottom: 4px; }
.card-form input[type=text], .card-form textarea {
    width: 100%; padding: 6px 8px; border: 1px solid #ccc; border-radius: 3px;
    font-family: inherit; font-size: 14px; }
.card-form small { display: block; color: #888; margin-top: 4px; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 800px) { .two-col { grid-template-columns: 1fr; } }

/* Login page */
body.centered { display: flex; align-items: center; justify-content: center;
                min-height: 100vh; background: #2c3e50; }
.card { background: #fff; padding: 32px; border-radius: 8px;
        max-width: 360px; width: 90%; box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
.card h1 { margin-top: 0; }
.card .subtitle { color: #666; margin-bottom: 24px; }
.card label { display: block; margin-bottom: 16px; }
.card label span { display: block; margin-bottom: 4px; font-weight: 600; }
.card input { width: 100%; padding: 8px 10px; border: 1px solid #ccc;
              border-radius: 3px; font-size: 14px; }
.card button { width: 100%; padding: 10px; background: #1976d2; color: #fff;
               border: 0; border-radius: 3px; font-size: 15px; cursor: pointer; }