:root {
    --color-bg: #f6f8fa;
    --color-card: #fff;
    --color-border: #e1e4e8;
    --color-primary: #0969da;
    --color-primary-hover: #0550ae;
    --color-text: #1f2328;
    --color-text-muted: #656d76;
    --color-error: #cf222e;
    --color-success: #1a7f37;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,.08);
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

* { box-sizing: border-box; }
body {
    font-family: var(--font);
    background: var(--color-bg);
    color: var(--color-text);
    margin: 0;
    min-height: 100vh;
    line-height: 1.5;
}

.with-nav .main-content { padding: 24px; max-width: 1200px; margin: 0 auto; }
.standalone-page { max-width: 420px; margin: 0 auto; padding: 40px 24px; }

.site-header {
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 24px;
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.brand { font-weight: 600; color: var(--color-text); text-decoration: none; font-size: 1.1rem; }
.brand:hover { color: var(--color-primary); }
.site-header nav { display: flex; gap: 16px; align-items: center; }
.site-header nav a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 14px;
}
.site-header nav a:hover { color: var(--color-primary); }
.nav-logout { color: var(--color-text-muted); }
.site-footer {
    text-align: center;
    padding: 16px;
    color: var(--color-text-muted);
    font-size: 13px;
    border-top: 1px solid var(--color-border);
    background: var(--color-card);
}

h1 { font-size: 1.35rem; margin: 0 0 20px; }

.card {
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border);
    padding: 24px;
    margin-bottom: 24px;
}

label { display: block; font-weight: 500; margin-bottom: 6px; font-size: 14px; }
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="datetime-local"],
select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 14px;
    margin-bottom: 14px;
}
input:focus, select:focus { outline: none; border-color: var(--color-primary); }

.btn {
    display: inline-block;
    padding: 10px 18px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    text-decoration: none;
    font-family: inherit;
}
.btn:hover { background: var(--color-primary-hover); }
.btn-secondary {
    background: var(--color-text-muted);
    color: #fff;
}
.btn-secondary:hover { background: #4a5568; }
.btn-small { padding: 6px 12px; font-size: 12px; }
.btn-danger { background: var(--color-error); }
.btn-danger:hover { background: #a40e26; }

.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; }
.alert-error { background: #ffebe9; color: var(--color-error); border: 1px solid #ffcecb; }
.alert-success { background: #dafbe1; color: var(--color-success); border: 1px solid #a3e9b0; }

.table-wrap { overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}
th, td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--color-border); }
th { background: #f6f8fa; font-weight: 600; font-size: 13px; }
tr:hover td { background: #fafafa; }
tr.inactive td { color: var(--color-text-muted); }

.form-actions { margin-top: 20px; display: flex; gap: 10px; flex-wrap: wrap; }
.form-row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.form-row .field { flex: 1; min-width: 100px; }
.form-row label { margin-bottom: 4px; }

.license-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.license-actions form { display: inline; }

.expiry-form {
    background: #f6f8fa;
    padding: 12px;
    border-radius: 6px;
    margin-top: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: flex-end;
}
.expiry-form input[type="number"] { width: 80px; margin-bottom: 0; }
.expiry-form select { width: auto; min-width: 100px; margin-bottom: 0; }

@media (max-width: 768px) {
    .header-inner { flex-direction: column; gap: 12px; }
    .site-header nav { flex-wrap: wrap; justify-content: center; }
    table { font-size: 13px; }
    th, td { padding: 8px; }
}