:root {
  color-scheme: dark;
  --bg: #0a0f14;
  --surface: #111922;
  --surface-2: #17222e;
  --line: #253443;
  --text: #edf4f7;
  --muted: #91a2af;
  --accent: #61e6bd;
  --accent-dark: #153e35;
  --danger: #ff7272;
  --warning: #ffbf5f;
  --radius: 14px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 80% -20%, #163443 0, transparent 34rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, Pretendard, "Noto Sans KR", system-ui, sans-serif;
}
a { color: inherit; text-decoration: none; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 68px;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 32px;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 15, 20, .9);
  backdrop-filter: blur(14px);
}
.brand { display: flex; align-items: center; gap: 9px; font-weight: 800; letter-spacing: -.02em; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--accent);
  color: #052018;
  font-size: 13px;
}
nav { display: flex; gap: 22px; color: var(--muted); font-size: 14px; }
nav a:hover { color: var(--text); }
.account { margin-left: auto; display: flex; align-items: center; gap: 14px; font-size: 14px; }
.account form { margin: 0; }
.page { max-width: 1440px; margin: 0 auto; padding: 44px 32px 72px; }
.page-heading { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 28px; }
h1, h2, p { margin-top: 0; }
h1 { font-size: clamp(30px, 4vw, 48px); line-height: 1.05; letter-spacing: -.045em; margin-bottom: 10px; }
h2 { letter-spacing: -.025em; }
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: .14em; }
.muted { color: var(--muted); }
.mono { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 12px; }
.button, button {
  border: 0;
  border-radius: 10px;
  padding: 11px 16px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.primary { background: var(--accent); color: #052018; }
.secondary { background: var(--surface-2); border: 1px solid var(--line); }
.link-button { background: transparent; color: var(--muted); padding: 0; }
.subtle-link { display: inline-block; margin-top: 18px; color: var(--muted); font-size: 14px; }
.server-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 16px; }
.server-card, .panel, .form-panel, .success-panel, .empty-state {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(155deg, rgba(23, 34, 46, .92), rgba(14, 22, 29, .92));
}
.server-card { padding: 22px; transition: transform .18s, border-color .18s; }
.server-card:hover { transform: translateY(-2px); border-color: #456375; }
.server-card h2 { margin: 24px 0 5px; }
.site-name { color: var(--muted); }
.card-topline, .panel-heading { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.status, .severity {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border-radius: 999px;
  padding: 4px 9px;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  background: #24313c;
  color: #c5d0d8;
}
.status.online, .status.running { background: var(--accent-dark); color: var(--accent); }
.status.offline, .status.error, .severity.error, .severity.critical { background: #461f28; color: #ff9696; }
.status.degraded, .status.reconnecting, .status.no_signal, .severity.warning { background: #44351b; color: var(--warning); }
.metric-pair { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 25px; }
.metric-pair div { padding: 11px; background: #0c141b; border-radius: 10px; }
.metric-pair span, .summary-strip span { display: block; color: var(--muted); font-size: 11px; margin-bottom: 5px; }
.metric-pair strong { font-size: 17px; }
.summary-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1px; margin-bottom: 18px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--line); }
.summary-strip div { padding: 18px; background: var(--surface); }
.two-column { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }
.panel { padding: 20px; margin-bottom: 18px; }
.panel-heading { margin-bottom: 14px; }
.panel-heading h2 { margin: 0; font-size: 18px; }
.panel-heading span, .panel-heading a { color: var(--muted); font-size: 13px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 11px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .06em; }
.event-row { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.event-row small { display: block; color: var(--muted); margin-top: 4px; }
.event-details { display: block; margin-top: 7px; color: #b9c8d1; white-space: pre-wrap; overflow-wrap: anywhere; }
.event-row time { color: var(--muted); font-size: 12px; }
.auth-shell { min-height: calc(100vh - 170px); display: grid; place-items: center; }
.auth-card, .form-panel, .success-panel { width: min(100%, 520px); padding: 34px; margin: 0 auto; }
.stack { display: grid; gap: 17px; }
label { display: grid; gap: 8px; color: #c8d4db; font-size: 13px; font-weight: 700; }
input, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #091017;
  color: var(--text);
  padding: 12px 13px;
  font: inherit;
}
input:focus, select:focus { outline: 2px solid rgba(97, 230, 189, .35); border-color: var(--accent); }
button:disabled { cursor: not-allowed; opacity: .45; }
.alert { padding: 12px 14px; border-radius: 10px; margin: 16px 0; font-size: 13px; }
.alert.error { background: #461f28; color: #ffb0b0; }
.alert.warning { background: #44351b; color: #ffd58b; }
.secret-box { display: flex; gap: 10px; align-items: center; padding: 12px; background: #070d12; border: 1px dashed #4a6474; border-radius: 10px; overflow: hidden; }
.secret-box code { overflow-wrap: anywhere; flex: 1; }
.empty-state { text-align: center; padding: 70px 24px; color: var(--muted); }

@media (max-width: 800px) {
  .topbar { padding: 0 18px; flex-wrap: wrap; gap: 14px; }
  nav { order: 3; width: 100%; padding-bottom: 12px; overflow-x: auto; }
  .account span { display: none; }
  .page { padding: 30px 18px 60px; }
  .page-heading { align-items: start; flex-direction: column; }
  .two-column, .summary-strip { grid-template-columns: 1fr; }
  .metric-pair { grid-template-columns: repeat(2, 1fr); }
  .event-row { grid-template-columns: auto 1fr; }
  .event-row time { grid-column: 2; }
}