* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: #17202a;
    background: #f5f7f9;
}
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 24px;
    background: #1f2933;
    color: #fff;
}
nav { display: flex; gap: 14px; }
nav a { color: #fff; text-decoration: none; }
main { max-width: 1180px; margin: 24px auto; padding: 0 18px; }
.panel {
    background: #fff;
    border: 1px solid #dde3ea;
    border-radius: 8px;
    padding: 18px;
    margin-bottom: 18px;
}
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
h1 { font-size: 26px; margin: 0 0 18px; }
h2 { font-size: 18px; margin: 0 0 14px; }
label { display: block; font-weight: 700; margin: 12px 0 6px; }
input, select, textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #c9d3df;
    border-radius: 6px;
    font-size: 15px;
}
button, .button {
    display: inline-block;
    border: 0;
    border-radius: 6px;
    padding: 10px 14px;
    color: #fff;
    background: #0f766e;
    text-decoration: none;
    font-weight: 700;
    cursor: pointer;
    margin-top: 12px;
}
.danger { background: #b42318; }
.muted { color: #667085; font-size: 13px; }
.flash { background: #ecfdf3; border: 1px solid #abefc6; color: #067647; padding: 12px; border-radius: 6px; margin-bottom: 18px; }
.error { background: #fff1f0; border: 1px solid #ffa39e; color: #a8071a; padding: 12px; border-radius: 6px; margin-bottom: 18px; }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { border-bottom: 1px solid #e5eaf0; padding: 10px; text-align: left; vertical-align: top; }
th { background: #f0f3f6; font-size: 13px; }
code { overflow-wrap: anywhere; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
@media (max-width: 680px) {
    header { align-items: flex-start; flex-direction: column; gap: 10px; }
    table { display: block; overflow-x: auto; }
}