:root {
  color-scheme: light;
  --ink: #18232e;
  --muted: #64748b;
  --soft: #8da0b5;
  --paper: #f5f1e9;
  --panel: rgba(255, 252, 244, 0.82);
  --panel-strong: #fffaf0;
  --line: rgba(37, 51, 66, 0.12);
  --accent: #db5f3f;
  --accent-2: #0d9488;
  --accent-3: #355c7d;
  --good: #16a34a;
  --warn: #d97706;
  --bad: #dc2626;
  --shadow: 0 16px 46px rgba(39, 48, 62, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Aptos Display", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 10% 8%, rgba(219, 95, 63, 0.20), transparent 30rem),
    radial-gradient(circle at 85% 12%, rgba(13, 148, 136, 0.16), transparent 28rem),
    linear-gradient(135deg, #f7efe4 0%, #edf4ef 48%, #e9eef6 100%);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  opacity: 0.32;
  background-image:
    linear-gradient(rgba(24, 35, 46, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 35, 46, 0.08) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, black, transparent 80%);
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.shell {
  width: min(1360px, calc(100vw - 28px));
  margin: 0 auto;
  padding: 16px 0 36px;
}

.hero {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.76);
  border-radius: 26px;
  background:
    linear-gradient(120deg, rgba(255, 250, 240, 0.88), rgba(229, 238, 247, 0.76)),
    radial-gradient(circle at 84% 20%, rgba(53, 92, 125, 0.20), transparent 24rem);
  box-shadow: var(--shadow);
}

.hero::after {
  position: absolute;
  right: -120px;
  bottom: -190px;
  width: 420px;
  height: 420px;
  content: "";
  border: 70px solid rgba(219, 95, 63, 0.13);
  border-radius: 50%;
}

.topbar {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  color: #fff8ec;
  place-items: center;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--accent), #253a52);
  box-shadow: 0 12px 26px rgba(219, 95, 63, 0.28);
}

.brand-text {
  font-size: 17px;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-links a {
  padding: 8px 12px;
  color: #405064;
  font-size: 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.45);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 20px;
  padding: 26px 30px 32px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow::before {
  display: inline-block;
  width: 10px;
  height: 10px;
  content: "";
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 6px rgba(219, 95, 63, 0.12);
}

h1,
h2 {
  margin: 0;
  line-height: 1;
  letter-spacing: -0.055em;
}

h1 {
  max-width: 760px;
  margin-top: 16px;
  font-size: clamp(34px, 5vw, 68px);
}

h2 {
  font-size: clamp(22px, 2.4vw, 32px);
}

.hero-copy p {
  max-width: 650px;
  margin: 14px 0 0;
  color: #4f6072;
  font-size: 16px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.primary {
  padding: 10px 16px;
  color: #fffaf0;
  cursor: pointer;
  border: 0;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #b94733);
  box-shadow: 0 16px 32px rgba(219, 95, 63, 0.25);
}

.sync-state {
  color: var(--muted);
  font-size: 14px;
  min-width: 190px;
  font-variant-numeric: tabular-nums;
}

.hero-status {
  align-self: end;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 22px;
  background: rgba(255, 252, 244, 0.70);
  backdrop-filter: blur(20px);
  box-shadow: 0 18px 55px rgba(39, 48, 62, 0.12);
}

.orb {
  width: 58px;
  height: 58px;
  margin-bottom: 16px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%, #fff, transparent 13px),
    linear-gradient(135deg, var(--accent-2), var(--accent-3));
  box-shadow:
    0 0 0 12px rgba(13, 148, 136, 0.09),
    0 16px 34px rgba(13, 148, 136, 0.24);
  animation: floatOrb 5s ease-in-out infinite;
}

.status-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
}

.status-row span {
  color: var(--muted);
  font-size: 14px;
}

.status-row strong {
  font-size: 19px;
  letter-spacing: -0.03em;
}

main {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.metric-card,
.panel {
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.metric-card {
  display: grid;
  gap: 9px;
  padding: 18px;
}

.metric-card span {
  color: var(--muted);
  font-size: 14px;
}

.metric-card strong {
  font-size: clamp(24px, 2.7vw, 36px);
  line-height: 1;
  letter-spacing: -0.06em;
}

.metric-card small {
  color: var(--soft);
}

.metric-card em {
  color: var(--ink);
  font-style: normal;
  font-weight: 700;
}

.panel {
  padding: 20px;
}

.wide {
  min-width: 0;
}

.section-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}

.section-head h2 {
  margin-top: 8px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 6px 11px;
  color: #456074;
  white-space: nowrap;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.55);
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.node-card {
  position: relative;
  overflow: hidden;
  min-height: 210px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.62), rgba(255, 252, 244, 0.74)),
    radial-gradient(circle at 100% 0%, rgba(219, 95, 63, 0.12), transparent 12rem);
}

.node-card.offline {
  opacity: 0.72;
  background: rgba(255, 255, 255, 0.42);
}

.node-top {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}

.node-title {
  display: grid;
  gap: 5px;
}

.node-title strong {
  font-size: 19px;
  letter-spacing: -0.03em;
}

.node-title span,
.node-meta span,
.channel-meta span {
  color: var(--muted);
  font-size: 13px;
}

.status-dot {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

.status-dot::before {
  width: 10px;
  height: 10px;
  content: "";
  border-radius: 50%;
  background: var(--bad);
}

.status-dot.online::before {
  background: var(--good);
  box-shadow: 0 0 0 6px rgba(22, 163, 74, 0.12);
}

.gauge-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 14px 0;
}

.gauge {
  display: grid;
  gap: 6px;
}

.gauge small {
  color: var(--muted);
}

.bar {
  height: 7px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(24, 35, 46, 0.10);
}

.bar span {
  display: block;
  width: var(--value, 0%);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
}

.node-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.node-meta strong {
  display: block;
  margin-top: 3px;
  font-size: 15px;
}

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 16px;
}

.chart {
  width: 100%;
  height: 320px;
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.channel-card {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.50);
}

.channel-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.channel-top strong {
  display: block;
  margin-bottom: 4px;
  font-size: 16px;
}

.channel-status {
  color: #fff;
  align-self: start;
  padding: 5px 9px;
  font-size: 12px;
  font-weight: 800;
  border-radius: 999px;
  background: var(--bad);
}

.channel-status.operational {
  background: var(--good);
}

.channel-status.degraded {
  background: var(--warn);
}

.heatmap {
  display: grid;
  grid-template-columns: repeat(28, 1fr);
  gap: 3px;
  margin: 11px 0;
}

.day {
  height: 14px;
  border-radius: 4px;
  background: rgba(100, 116, 139, 0.18);
}

.day.operational {
  background: var(--good);
}

.day.degraded {
  background: var(--warn);
}

.day.failed,
.day.error {
  background: var(--bad);
}

.channel-meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.empty-state {
  display: grid;
  place-items: center;
  min-height: 120px;
  color: var(--muted);
  text-align: center;
  border: 1px dashed rgba(100, 116, 139, 0.35);
  border-radius: 18px;
}

.empty-state strong {
  color: var(--ink);
  font-size: 18px;
}

.fade-in {
  animation: reveal 0.28s ease both;
}

@keyframes floatOrb {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-9px);
  }
}

@keyframes reveal {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1100px) {
  .hero-grid,
  .two-col {
    grid-template-columns: 1fr;
  }

  .hero-status {
    align-self: stretch;
  }

  .metric-grid,
  .node-grid,
  .channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .shell {
    width: min(100vw - 18px, 1360px);
    padding-top: 9px;
  }

  .topbar,
  .hero-grid,
  .panel,
  .metric-card {
    padding: 16px;
  }

  h1 {
    font-size: clamp(32px, 12vw, 48px);
  }

  .topbar {
    align-items: start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
  }

  .nav-links a {
    flex: 1;
    text-align: center;
  }

  .metric-grid,
  .node-grid,
  .channel-grid,
  .node-meta,
  .gauge-row {
    grid-template-columns: 1fr;
  }

  .chart {
    height: 280px;
  }
}