:root {
  --bg: #e7ecf2;
  --panel: #ffffff;
  --ink: #111827;
  --muted: #647084;
  --accent: #2563eb;
  --green: #16a34a;
  --orange: #f59e0b;
  --red: #ef4444;
}

body.dark {
  --bg: #0f172a;
  --panel: #182235;
  --ink: #eef4ff;
  --muted: #9fb0ca;
  --accent: #60a5fa;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  transition: background .25s ease, color .25s ease;
}

.control-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 4vw;
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--panel);
  border-bottom: 1px solid rgba(100,112,132,.25);
}
.brand { font-weight: 900; letter-spacing: .04em; }
#themeToggle {
  border: 0;
  background: var(--accent);
  color: white;
  padding: 12px 16px;
  border-radius: 10px;
  font-weight: 800;
  cursor: pointer;
}

.hero {
  min-height: 82vh;
  padding: 70px 4vw;
  display: grid;
  grid-template-columns: 1fr 460px;
  gap: 42px;
  align-items: center;
}
.tag {
  color: var(--accent);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .16em;
  font-size: .76rem;
}
h1, h2 { margin: 0 0 20px; letter-spacing: -0.055em; line-height: .95; }
h1 { font-size: clamp(3.2rem, 7.8vw, 8rem); }
h2 { font-size: clamp(2.2rem, 5.2vw, 5.4rem); }
h3 { margin-top: 0; }
p { color: var(--muted); line-height: 1.75; }
.hero-copy p:last-child { font-size: 1.18rem; max-width: 860px; }

.dashboard {
  display: grid;
  gap: 16px;
  padding: 22px;
  border-radius: 28px;
  background: var(--panel);
  box-shadow: 0 30px 80px rgba(17,24,39,.12);
}
.status {
  padding: 24px;
  border-radius: 18px;
  color: white;
  font-weight: 900;
  position: relative;
  overflow: hidden;
}
.status::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.18), transparent);
  transform: translateX(-100%);
  animation: scan 3s infinite;
}
.online { background: var(--green); }
.warning { background: var(--orange); }
.alert { background: var(--red); }
@keyframes scan { to { transform: translateX(100%); } }

.nav-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(100,112,132,.25);
  padding: 1px;
}
.nav-grid a {
  background: var(--panel);
  color: var(--ink);
  text-decoration: none;
  padding: 22px 4vw;
  font-weight: 900;
}

section { padding: 92px 4vw; }
.section-title { max-width: 980px; }
.control-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 30px;
}
.control-grid article {
  background: var(--panel);
  padding: 28px;
  border-radius: 22px;
  border: 1px solid rgba(100,112,132,.2);
}
.control-grid article:hover { outline: 3px solid var(--accent); }

.cadence { background: var(--panel); }
.cadence-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.cadence-row div {
  padding: 26px;
  background: var(--bg);
  border-left: 6px solid var(--accent);
}
.cadence-row span { color: var(--accent); font-size: 1.7rem; font-weight: 900; }

.reporting {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 42px;
  align-items: start;
}
.report-list {
  display: grid;
  gap: 14px;
}
.report-list p {
  background: var(--panel);
  padding: 22px;
  border-radius: 16px;
}
.report-list strong { color: var(--ink); }

.essay {
  background: var(--accent);
}
.essay h2, .essay p { color: white; }
.essay p { max-width: 980px; font-size: 1.15rem; }
.contact {
  background: var(--panel);
}
.contact a {
  color: var(--accent);
  font-weight: 900;
  font-size: 1.6rem;
}

@media (max-width: 900px) {
  .hero, .reporting { grid-template-columns: 1fr; }
  .control-grid, .cadence-row, .nav-grid { grid-template-columns: 1fr; }
}