:root {
  --bg: #f4f6f9; --fg: #1d2733; --muted: #6b7785; --card: #fff; --line: #dde3ea;
  --brand: #0b5cad; --ok: #1f8a4c; --bad: #c0392b; --warn: #b7791f;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; font-size: 15px;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); }
main { max-width: 1280px; margin: 0 auto; padding: 1.25rem; }
h1, h2, h3 { margin: 0 0 .75rem; font-weight: 600; }
h2 { font-size: 1.2rem; margin-top: 1.25rem; }
a { color: var(--brand); }

.nav { display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  background: #0f2a44; color: #fff; padding: .6rem 1.25rem; }
.nav a { color: #fff; text-decoration: none; margin-left: 1rem; }
.nav .brand { font-weight: 700; margin: 0; }
.nav .user { margin-left: 1rem; opacity: .75; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 1rem 1.25rem; margin-bottom: 1rem; }
.card.narrow { max-width: 420px; margin: 3rem auto; }

label { display: block; margin-bottom: .75rem; font-weight: 500; }
input, select, textarea { display: block; width: 100%; margin-top: .25rem; padding: .45rem .55rem;
  border: 1px solid var(--line); border-radius: 6px; font: inherit; }
form.inline { display: flex; flex-wrap: wrap; gap: .75rem; align-items: end; margin-top: 1rem; }
form.inline label { margin: 0; }
button, .button { display: inline-block; padding: .4rem .8rem; border: 1px solid var(--line); border-radius: 6px;
  background: #fff; color: var(--fg); font: inherit; cursor: pointer; text-decoration: none; }
button:hover, .button:hover { border-color: var(--brand); }
button:disabled { opacity: .5; cursor: wait; }
button.primary, .button.primary { background: var(--brand); color: #fff; border-color: var(--brand); }
button.danger { color: var(--bad); }
.actions { display: flex; flex-wrap: wrap; gap: .35rem; }
.hint { color: var(--muted); font-size: .9em; }
.alert { padding: .6rem .8rem; border-radius: 6px; }
.alert.error { background: #fdecea; color: var(--bad); }
.alert.warn { background: #fff7e6; color: var(--warn); }
.tag { font-size: .75rem; background: #e8eef5; color: var(--muted); border-radius: 4px; padding: .1rem .4rem; margin-left: .35rem; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1rem; }
article.server { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 1rem; }
article.server header { display: flex; align-items: baseline; justify-content: space-between; }
dl.metrics { display: grid; grid-template-columns: max-content 1fr; gap: .2rem .8rem; margin: .5rem 0 1rem; }
dl.metrics dt { color: var(--muted); }
dl.metrics dd { margin: 0; }

.table-wrap { overflow-x: auto; margin-bottom: 1rem; }
table { width: 100%; border-collapse: collapse; background: var(--card); }
th, td { text-align: left; padding: .45rem .6rem; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.vhost { border: 1px solid var(--line); border-radius: 8px; }
table.vhost tbody tr:first-child { background: #f0f4f9; }
table.list { margin: .5rem 0 1rem; }

/* Shield state (FR-3.6 / FR-3.7) */
.server.shielded .off-shield, .server.unshielded .on-shield { display: none; }
.server .noshield { display: none; color: var(--muted); }
.server.unshielded .noshield { display: block; }
article.server.unshielded dl.metrics { display: none; }
.server.loading [data-f] { color: var(--muted); }
.server.loading [data-f]::after { content: "…"; }
.server.unhealthy { outline: 2px solid var(--bad); outline-offset: -2px; background: #fff5f4; }
td.ok { color: var(--ok); } td.bad { color: var(--bad); }

dialog { border: 1px solid var(--line); border-radius: 10px; padding: 1.25rem; width: min(520px, 95vw); }
dialog::backdrop { background: rgb(0 0 0 / .35); }
fieldset.servers { border: 1px solid var(--line); border-radius: 6px; max-height: 260px; overflow: auto; }
fieldset.servers ul { list-style: none; padding-left: 1rem; margin: .25rem 0; }
fieldset.servers label { display: flex; gap: .4rem; align-items: center; margin: .15rem 0; font-weight: 400; }
fieldset.servers input { width: auto; display: inline; margin: 0; }

nav.tools a { margin-right: 1rem; }
nav.tools a.active { font-weight: 700; }

#toast { position: fixed; right: 1rem; bottom: 1rem; max-width: 420px; padding: .75rem 1rem; border-radius: 8px;
  background: #1d2733; color: #fff; opacity: 0; transform: translateY(10px); transition: all .2s; pointer-events: none; z-index: 10; }
#toast.show { opacity: 1; transform: none; }
#toast.ok { background: var(--ok); } #toast.error { background: var(--bad); }
.card.narrow + .card.narrow { margin-top: -2rem; }