:root {
  --bg: #0d0d0d;
  --surface: #141414;
  --surface2: #1c1c1c;
  --border: #2a2a2a;
  --fg: #f0ede8;
  --fg-muted: #8a8a8a;
  --accent: #f59e0b;
  --cyan: #06b6d4;
  --red: #ef4444;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-display: 'Syne', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.site-nav {
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.nav-logo .accent { color: var(--accent); }
.nav-tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--fg-muted);
  letter-spacing: 0.05em;
}

/* HERO */
.hero {
  padding: 80px 48px 64px;
  position: relative;
  overflow: hidden;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.3;
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--fg-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.eyebrow-dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(40px, 5vw, 72px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 28px;
}
.hero-headline .accent { color: var(--accent); }
.hero-sub {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 460px;
  line-height: 1.7;
}

/* SENSOR WIDGET */
.sensor-widget {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  font-family: 'IBM Plex Mono', monospace;
}
.widget-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.widget-title { font-size: 12px; color: var(--fg-muted); letter-spacing: 0.05em; }
.widget-status { font-size: 10px; letter-spacing: 0.1em; }
.widget-status.live { color: var(--accent); }
.widget-reading {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.reading-value {
  font-size: 48px;
  font-weight: 600;
  color: var(--fg);
  line-height: 1;
}
.reading-unit {
  font-size: 20px;
  color: var(--fg-muted);
  margin-left: 4px;
}
.reading-label { font-size: 12px; color: var(--fg-muted); }
.widget-bars { margin-bottom: 16px; }
.bar-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.bar-label { font-size: 11px; color: var(--fg-muted); width: 28px; }
.bar-track {
  flex: 1;
  height: 6px;
  background: var(--surface2);
  border-radius: 3px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  background: var(--cyan);
  border-radius: 3px;
}
.bar-fill.warning { background: var(--accent); }
.widget-alert {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: 4px;
  padding: 10px 12px;
  font-size: 11px;
  color: var(--accent);
  line-height: 1.5;
}
.hero-stats-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 16px;
}
.hero-stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
}
.stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}
.stat-desc { font-size: 12px; color: var(--fg-muted); }

/* METRICS BAND */
.metrics-band {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 28px 48px;
}
.metrics-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0;
}
.metric-item {
  flex: 1;
  text-align: center;
  padding: 0 32px;
}
.metric-num {
  display: block;
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--fg);
  line-height: 1;
  margin-bottom: 4px;
}
.metric-label {
  font-size: 12px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.metric-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* SECTION SHARED */
.section-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-headline {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 44px);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 48px;
}

/* FEATURES */
.features { padding: 80px 48px; }
.features-inner { max-width: 1200px; margin: 0 auto; }
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.feature-card {
  background: var(--surface);
  padding: 40px;
}
.feature-icon { margin-bottom: 20px; }
.feature-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}
.feature-card p {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* HOW IT WORKS */
.howitworks {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 80px 48px;
}
.howitworks-inner { max-width: 1200px; margin: 0 auto; }
.steps-row {
  display: flex;
  align-items: flex-start;
  gap: 24px;
}
.step { flex: 1; }
.step-connector {
  display: flex;
  align-items: center;
  padding-top: 36px;
}
.step-number {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 800;
  color: var(--border);
  line-height: 1;
  margin-bottom: 16px;
}
.step h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.step p { font-size: 14px; color: var(--fg-muted); line-height: 1.7; }

/* OUTCOMES */
.outcomes { padding: 80px 48px; }
.outcomes-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.outcomes-headline {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 44px);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 20px;
}
.outcomes-body {
  font-size: 16px;
  color: var(--fg-muted);
  line-height: 1.8;
  margin-bottom: 40px;
}
.outcomes-stack { display: flex; flex-direction: column; gap: 24px; }
.outcome-item { display: flex; align-items: baseline; gap: 16px; }
.outcome-num {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
  min-width: 80px;
}
.outcome-desc { font-size: 14px; color: var(--fg-muted); }

/* COST CALCULATOR */
.cost-calculator {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.calc-header {
  background: var(--surface2);
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
}
.calc-title {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--fg-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.calc-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  color: var(--fg-muted);
}
.calc-row:last-of-type { border-bottom: none; }
.calc-row.bold { color: var(--fg); }
.calc-val { font-family: 'IBM Plex Mono', monospace; font-size: 14px; }
.calc-val.accent { color: var(--accent); font-weight: 600; }
.calc-footer {
  background: var(--surface2);
  padding: 20px 24px;
  border-top: 1px solid var(--border);
}
.calc-footer p { font-size: 13px; color: var(--fg-muted); line-height: 1.6; }
.calc-footer strong { color: var(--accent); }

/* CLOSING */
.closing {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 100px 48px;
}
.closing-inner { max-width: 1200px; margin: 0 auto; }
.closing-content { max-width: 720px; }
.closing-overline {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--fg-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.closing-headline {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 52px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 28px;
}
.closing-body {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.8;
  max-width: 640px;
}

/* FOOTER */
.site-footer {
  padding: 28px 48px;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-logo {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
}
.footer-logo .accent { color: var(--accent); }
.footer-copy { font-size: 13px; color: var(--fg-muted); }
.footer-tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--fg-muted);
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .outcomes-inner { grid-template-columns: 1fr; gap: 48px; }
  .steps-row { flex-direction: column; gap: 16px; }
  .step-connector { display: none; }
  .metrics-inner { flex-wrap: wrap; gap: 16px; }
  .metric-item { flex: none; width: calc(50% - 16px); padding: 0; }
  .metric-divider { display: none; }
}
@media (max-width: 600px) {
  .hero { padding: 48px 24px 40px; }
  .features { padding: 48px 24px; }
  .howitworks { padding: 48px 24px; }
  .outcomes { padding: 48px 24px; }
  .closing { padding: 64px 24px; }
  .site-nav { padding: 16px 24px; }
  .site-footer { padding: 20px 24px; }
  .metrics-band { padding: 24px; }
  .features-grid { grid-template-columns: 1fr; }
}