:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --surface: #ffffff;
  --text: #182235;
  --muted: #718096;
  --line: #e5eaf1;
  --blue: #2864d7;
  --blue-soft: #edf3ff;
  --green: #16a36a;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--bg); color: var(--text); }
a { color: inherit; text-decoration: none; }
.topbar { height: 72px; display: flex; align-items: center; gap: 44px; padding: 0 max(28px, calc((100% - 1120px) / 2)); background: var(--surface); border-bottom: 1px solid var(--line); }
.brand { font-size: 21px; font-weight: 800; letter-spacing: -0.8px; white-space: nowrap; }
.brand span { color: var(--blue); }
nav { display: flex; align-items: center; gap: 28px; height: 100%; }
.nav-link { height: 100%; display: inline-flex; align-items: center; color: #657188; font-size: 14px; font-weight: 600; }
.nav-link.active { color: var(--blue); border-bottom: 2px solid var(--blue); }
.nav-link.unavailable { color: #a2aaba; cursor: default; }
.site-status { margin-left: auto; display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 12px; white-space: nowrap; }
.site-status i { width: 8px; height: 8px; border-radius: 50%; background: #d2a23b; }
.site-status i.online { background: var(--green); box-shadow: 0 0 0 3px #e6f6ef; }
.site-status i.offline { background: #d45c5c; box-shadow: 0 0 0 3px #faeaea; }
.layout { width: min(100% - 48px, 1000px); margin: 0 auto; }
.intro { padding: 76px 0 48px; }
.eyebrow { color: var(--blue); font-size: 10px; font-weight: 800; letter-spacing: 1.65px; }
h1 { margin: 18px 0 14px; font-size: clamp(34px, 5vw, 48px); line-height: 1.13; letter-spacing: -1.9px; }
h1 span { color: #73819a; }
.intro-copy { max-width: 590px; margin: 0; color: #68768c; font-size: 15px; line-height: 1.75; }
.content-panel { overflow: hidden; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 8px 30px rgba(30, 52, 86, .035); }
.panel-heading { display: flex; justify-content: space-between; align-items: center; padding: 24px 28px; border-bottom: 1px solid var(--line); }
h2 { margin: 7px 0 0; font-size: 20px; letter-spacing: -.45px; }
.problem-count { padding: 7px 11px; border-radius: 6px; background: #f2f5f9; color: #657188; font-size: 12px; font-weight: 650; }
.empty-state { display: grid; justify-items: center; text-align: center; padding: 65px 20px 72px; }
.empty-icon { width: 58px; height: 58px; display: grid; place-items: center; border-radius: 15px; background: var(--blue-soft); color: var(--blue); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 22px; font-weight: 750; }
.empty-state h3 { margin: 20px 0 8px; font-size: 17px; }
.empty-state p { max-width: 390px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.footer { display: flex; justify-content: space-between; padding: 28px 2px 36px; color: #8b96a8; font-size: 11px; }
@media (max-width: 650px) {
  .topbar { height: auto; min-height: 64px; padding: 0 18px; gap: 18px; flex-wrap: wrap; }
  nav { order: 3; width: 100%; height: 42px; gap: 22px; }
  .site-status { margin-left: auto; }
  .layout { width: min(100% - 32px, 1000px); }
  .intro { padding: 54px 0 34px; }
  .panel-heading { padding: 20px; }
  .empty-state { padding: 52px 18px 58px; }
}