body {
    margin: 0;
    background: #f4f6f8;
    color: #18202a;
    font-family: system-ui, sans-serif;
}
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    background: #17202a;
    color: #fff;
}
main { max-width: 1050px; margin: 24px auto; padding: 0 16px; }
.card { margin-bottom: 18px; padding: 20px; border: 1px solid #dce2e8; border-radius: 10px; background: #fff; }
.login-card { max-width: 460px; margin: 30px auto; }
.account-card { max-width: 680px; }
label { display: block; margin: 14px 0 6px; font-weight: 650; }
input, textarea, select { width: 100%; box-sizing: border-box; padding: 9px; border: 1px solid #bcc7d1; border-radius: 6px; }
textarea { min-height: 90px; }
.checkbox-input { width: auto; }
.btn, button { display: inline-block; padding: 9px 14px; border: 0; border-radius: 6px; background: #1769aa; color: #fff; text-decoration: none; cursor: pointer; }
.danger { background: #b42318; }
.muted { color: #667085; }
.error { padding: 10px; border: 1px solid #f3b7b2; border-radius: 6px; background: #fff1f0; color: #b42318; }
.ok { color: #067647; }
.success { padding: 10px; border: 1px solid #a6dfc3; border-radius: 6px; background: #ecfdf3; color: #067647; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 9px; border-bottom: 1px solid #e5e7eb; text-align: left; vertical-align: top; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.inline { display: inline; }
.preview { max-width: 140px; max-height: 100px; }
nav a { margin-right: 12px; color: #fff; }

@media (max-width: 720px) {
    header { align-items: flex-start; gap: 12px; padding: 12px 16px; }
    main { margin: 14px auto; padding: 0 10px; }
    .card { padding: 14px; overflow-x: auto; }
}