:root {
  --bg: #07111f;
  --bg-soft: #0c1b2e;
  --card: rgba(16, 32, 52, 0.78);
  --line: rgba(126, 219, 255, 0.18);
  --text: #eff8ff;
  --muted: #9eb8cc;
  --cyan: #31d7ff;
  --green: #44f2a1;
  --blue: #4285ff;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at 20% 0%, rgba(49, 215, 255, 0.13), transparent 35%), var(--bg);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(7, 17, 31, 0.78);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; justify-content: space-between; align-items: center; padding: 18px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 800; letter-spacing: 0.02em; }
.brand-icon { width: 17px; height: 17px; border-radius: 50%; background: linear-gradient(135deg, var(--cyan), var(--green)); box-shadow: 0 0 24px var(--cyan); }
nav { display: flex; align-items: center; gap: 22px; color: var(--muted); font-size: 14px; }
.nav-button { color: var(--text); border: 1px solid var(--line); padding: 10px 14px; border-radius: 999px; }

.hero { position: relative; overflow: hidden; padding: 94px 0 72px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 54px; align-items: center; }
.eyebrow { color: var(--green); text-transform: uppercase; letter-spacing: 0.18em; font-size: 12px; font-weight: 800; }
.center { text-align: center; }
h1 { font-size: clamp(42px, 6vw, 72px); line-height: 0.98; margin: 16px 0 24px; }
h2 { font-size: clamp(30px, 4vw, 46px); text-align: center; margin: 12px 0 28px; }
.hero-text, .section-text { color: var(--muted); font-size: 18px; line-height: 1.7; max-width: 650px; }
.hero-actions { display: flex; gap: 14px; margin: 34px 0; flex-wrap: wrap; }
.primary-button, .secondary-button, button {
  border: 0;
  border-radius: 999px;
  padding: 14px 22px;
  font-weight: 800;
  cursor: pointer;
}
.primary-button, button { background: linear-gradient(135deg, var(--cyan), var(--green)); color: #03111a; }
.secondary-button { border: 1px solid var(--line); color: var(--text); background: rgba(255,255,255,0.03); }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.metrics div { border: 1px solid var(--line); border-radius: 18px; padding: 16px; background: rgba(255,255,255,0.03); }
.metrics strong { display: block; font-size: 22px; color: var(--cyan); }
.metrics span { color: var(--muted); font-size: 13px; }

.hero-card { background: var(--card); border: 1px solid var(--line); border-radius: 28px; padding: 24px; box-shadow: var(--shadow); position: relative; }
.dashboard-top { display: flex; gap: 7px; margin-bottom: 24px; }
.dashboard-top span { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.status-row { display: flex; justify-content: space-between; gap: 16px; align-items: start; }
.status-row p, .sensor-card span { color: var(--muted); margin: 0; font-size: 13px; }
.status-row h3 { margin: 6px 0 0; font-size: 22px; }
.online { color: #022014; background: var(--green); padding: 7px 11px; border-radius: 999px; font-size: 12px; font-weight: 900; }
.sensor-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 24px 0; }
.sensor-card { background: rgba(255,255,255,0.04); border: 1px solid var(--line); border-radius: 18px; padding: 16px; }
.sensor-card strong { display: block; margin-top: 8px; font-size: 23px; }
.chart { height: 160px; display: flex; align-items: end; gap: 12px; padding: 18px; border-radius: 20px; background: linear-gradient(180deg, rgba(49,215,255,0.08), rgba(68,242,161,0.04)); border: 1px solid var(--line); }
.chart span { flex: 1; border-radius: 8px 8px 0 0; background: linear-gradient(180deg, var(--cyan), var(--blue)); opacity: 0.9; }
.glow { position: absolute; border-radius: 50%; filter: blur(30px); opacity: 0.35; }
.glow-one { width: 320px; height: 320px; background: var(--cyan); top: 90px; right: 10%; }
.glow-two { width: 260px; height: 260px; background: var(--green); bottom: -70px; left: 5%; }

.section { padding: 74px 0; }
.muted { background: rgba(255,255,255,0.025); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.flow { display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap; margin-top: 34px; }
.flow div { padding: 16px 20px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,0.04); font-weight: 800; }
.flow span { color: var(--cyan); font-size: 22px; }
.solutions-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.solutions-grid article { border: 1px solid var(--line); border-radius: 22px; padding: 22px; background: rgba(255,255,255,0.035); }
.solutions-grid h3 { margin-top: 0; }
.solutions-grid p { color: var(--muted); line-height: 1.6; }
.feature-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 38px; align-items: center; }
.feature-grid h2 { text-align: left; }
.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.features span { border: 1px solid var(--line); background: rgba(255,255,255,0.04); border-radius: 999px; padding: 14px 18px; font-weight: 700; }
.contact-card { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 36px; border: 1px solid var(--line); background: linear-gradient(135deg, rgba(49,215,255,0.10), rgba(68,242,161,0.06)); border-radius: 28px; padding: 34px; }
.contact-card h2 { text-align: left; }
.contact-card p { color: var(--muted); line-height: 1.6; }
form { display: grid; gap: 12px; }
input, textarea { width: 100%; border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; color: var(--text); background: rgba(3, 11, 20, 0.55); outline: none; }
textarea { resize: vertical; }
footer { border-top: 1px solid var(--line); color: var(--muted); }
.footer-content { display: flex; justify-content: space-between; padding: 26px 0; }

@media (max-width: 880px) {
  nav { display: none; }
  .hero-grid, .feature-grid, .contact-card { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .metrics, .sensor-grid, .solutions-grid, .features { grid-template-columns: 1fr; }
  .hero { padding-top: 58px; }
  .contact-card { padding: 24px; }
}