:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #07131f;
  color: #f4f7fb;
  --panel: #091a28;
  --line: #24425a;
  --muted: #9bb0c2;
  --green: #76ddb0;
  --amber: #f4c76c;
  --red: #ff8b8b;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 80% 0%, #143754 0, #07131f 38%); }
.shell { width: min(1100px, calc(100% - 28px)); margin: 0 auto; padding: 38px 0 24px; }
.site-header, .site-card > header, footer { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(2rem, 6vw, 4.2rem); letter-spacing: -0.055em; }
h2 { margin-bottom: 0; font-size: clamp(1.7rem, 4vw, 2.6rem); letter-spacing: -0.04em; }
.eyebrow { margin-bottom: 6px; color: #9fc2df; font-size: .76rem; font-weight: 800; letter-spacing: .19em; }
.intro { color: var(--muted); font-size: 1.05rem; margin: 12px 0 28px; }
.site-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 0; }
.site-nav a { color: #cfe7fa; border: 1px solid var(--line); border-radius: 999px; padding: 8px 13px; text-decoration: none; font-size: .84rem; font-weight: 700; }
.site-nav a:hover, .site-nav a:focus-visible { background: #15364d; outline: none; }
.site-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.site-card { border: 1px solid var(--line); border-radius: 24px; padding: 24px; background: rgba(9, 26, 40, .94); box-shadow: 0 24px 70px rgba(0,0,0,.22); }
.site-card.stale { border-color: #785d2e; }
.site-card.offline { border-color: #68383d; }
.metrics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 24px; }
.metric { min-height: 96px; border: 1px solid var(--line); border-radius: 16px; padding: 14px; display: flex; flex-direction: column; justify-content: space-between; }
.metric span { color: #bfd0de; font-size: .86rem; }
.metric strong { font-size: 1.35rem; line-height: 1.15; }
.metric.warning strong { color: var(--amber); }
.metric.critical { border-color: #713d43; }
.metric.critical strong { color: var(--red); }
.badge { display: inline-flex; align-items: center; justify-content: center; padding: 8px 13px; border-radius: 999px; text-transform: capitalize; white-space: nowrap; font-size: .86rem; font-weight: 800; }
.badge.online { background: #104d3a; color: var(--green); }
.badge.stale { background: #4c3b1d; color: var(--amber); }
.badge.offline { background: #4a252b; color: var(--red); }
.badge.neutral { background: #18364c; color: #bad4e9; }
.age, .empty { color: var(--muted); margin: 18px 0 0; font-size: .84rem; }
.message { border: 1px solid #713d43; color: #ffd1d1; background: #351a20; padding: 12px 15px; border-radius: 12px; margin-bottom: 18px; }
footer { color: #7890a4; font-size: .78rem; padding: 24px 4px 0; }
dialog { width: min(430px, calc(100% - 28px)); color: #f4f7fb; background: #0a1c2a; border: 1px solid var(--line); border-radius: 22px; padding: 0; box-shadow: 0 28px 100px #000; }
dialog::backdrop { background: rgba(1, 8, 14, .82); backdrop-filter: blur(8px); }
dialog form { padding: 26px; }
dialog p:not(.eyebrow):not(.form-error) { color: var(--muted); line-height: 1.5; }
label { display: block; margin: 22px 0 7px; color: #c7d7e4; font-size: .86rem; }
input { width: 100%; border: 1px solid var(--line); border-radius: 11px; background: #06121c; color: white; padding: 13px; font: inherit; }
button { width: 100%; margin-top: 14px; border: 0; border-radius: 11px; padding: 13px; background: #edf5fb; color: #082035; font: inherit; font-weight: 800; cursor: pointer; }
.form-error { color: var(--red); margin: 10px 0 0; font-size: .85rem; }

@media (max-width: 760px) {
  .shell { padding-top: 24px; }
  .site-header { align-items: flex-start; }
  .site-grid { grid-template-columns: 1fr; }
  .site-card { padding: 19px; border-radius: 20px; }
}

@media (max-width: 390px) {
  .metrics { grid-template-columns: 1fr; }
  .site-header { flex-direction: column; }
}