:root {
  --bg: #0d1224;
  --bg-alt: #10182f;
  --surface: #161f3a;
  --surface-2: #1c2745;
  --border: #2a3557;
  --text: #eef1fb;
  --text-dim: #a9b2d0;
  --accent: #ff8a3d;
  --accent-2: #54c0ff;
  --accent-soft: rgba(255, 138, 61, 0.12);
  --radius: 14px;
  --max-width: 1180px;
  font-size: 16px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }

a { color: var(--accent-2); }

.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: relative;
  background: linear-gradient(180deg, #0a0e1c 0%, var(--bg) 100%);
  overflow: hidden;
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  position: relative;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
}

.brand-mark {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover { color: var(--text); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2.5rem;
  align-items: center;
  padding: 3rem 1.5rem 5rem;
  position: relative;
  z-index: 5;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 1rem;
}

.hero h1 {
  font-size: clamp(2.1rem, 4.2vw, 3.4rem);
  line-height: 1.12;
  margin: 0 0 1.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-sub {
  color: var(--text-dim);
  font-size: 1.08rem;
  max-width: 46ch;
  margin: 0 0 2rem;
}

.hero-actions { display: flex; gap: 0.9rem; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #ff6a3d);
  color: #1a0e05;
  box-shadow: 0 8px 24px rgba(255, 138, 61, 0.25);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(255, 138, 61, 0.35); }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover { border-color: var(--accent-2); color: var(--accent-2); }

.hero-visual { position: relative; }

.rv-svg { width: 100%; height: auto; border-radius: var(--radius); box-shadow: 0 20px 60px rgba(0,0,0,0.4); }

.rv-body { animation: float 5s ease-in-out infinite; transform-origin: center; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.solar-panel rect { animation: glint 3s ease-in-out infinite; }

@keyframes glint {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

/* ---------- Stats strip ---------- */
.stats-strip {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stats-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.75rem 1.5rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.stat { text-align: left; }

.stat-num {
  display: block;
  font-size: 2.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-dim);
  font-size: 0.86rem;
  line-height: 1.4;
}

/* ---------- Sections ---------- */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 5rem 1.5rem;
}

.section.alt { background: var(--bg-alt); max-width: none; }
.section.alt > * { max-width: var(--max-width); margin-left: auto; margin-right: auto; }
.section.alt { padding-left: 0; padding-right: 0; }
.section.alt .section-head,
.section.alt .card-grid,
.section.alt .compare-table,
.section.alt .feature-tabs,
.section.alt .timeline { padding-left: 1.5rem; padding-right: 1.5rem; }

.section-head { max-width: 62ch; margin-bottom: 2.75rem; }

.section-kicker {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-2);
  margin: 0 0 0.75rem;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0 0 0.9rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.section-intro { color: var(--text-dim); font-size: 1.02rem; margin: 0; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover { transform: translateY(-4px); border-color: var(--accent); }

.card h3 { margin: 0 0 0.4rem; font-size: 1.08rem; }

.card-tag {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 0.7rem;
}

.card p:last-child { color: var(--text-dim); font-size: 0.94rem; margin: 0; }

.reality-check {
  margin-top: 2.25rem;
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.95rem;
  color: var(--text-dim);
}

.reality-check strong { color: var(--text); }

/* ---------- Compare table ---------- */
.compare-table {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 2.5rem;
}

.compare-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  border-bottom: 1px solid var(--border);
}

.compare-row:last-child { border-bottom: none; }

.compare-row > div {
  padding: 0.9rem 1.25rem;
  font-size: 0.92rem;
}

.compare-head {
  background: var(--surface-2);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.compare-head > div:nth-child(3) { color: var(--accent); }

.compare-label { font-weight: 600; color: var(--text); }
.compare-row > div:not(.compare-label) { color: var(--text-dim); }
.compare-row > div:nth-child(3):not(.compare-head *) { color: var(--text); }

/* ---------- Tabs ---------- */
.feature-tabs {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.tab-buttons {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.tab-btn {
  flex: 1 1 auto;
  min-width: 150px;
  padding: 1rem 1.25rem;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.tab-btn:hover { color: var(--text); }

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: var(--surface);
}

.tab-panels { padding: 2rem 1.75rem; }

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn 0.3s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.tab-panel h3 { margin: 0 0 0.6rem; font-size: 1.15rem; }
.tab-panel p { color: var(--text-dim); margin: 0; }

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  padding-left: 1.75rem;
  border-left: 2px solid var(--border);
}

.timeline-item { position: relative; padding-bottom: 2.25rem; padding-left: 1.5rem; }
.timeline-item:last-child { padding-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -2.4rem;
  top: 0.3rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.timeline-content h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.timeline-content p { margin: 0; color: var(--text-dim); font-size: 0.94rem; }

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--text-dim);
  font-size: 0.88rem;
}

.back-top { color: var(--text-dim); text-decoration: none; }
.back-top:hover { color: var(--accent-2); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 2rem; }
  .hero-visual { order: -1; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .compare-row { grid-template-columns: 1fr 1fr 1fr; font-size: 0.85rem; }
}

@media (max-width: 720px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-alt);
    flex-direction: column;
    padding: 1rem 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .stats-inner { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
  .compare-row { grid-template-columns: 1fr; }
  .compare-row > div { padding: 0.6rem 1.25rem; }
  .compare-row:not(.compare-head) { padding-top: 0.5rem; }
  .compare-label { padding-bottom: 0 !important; font-weight: 700; }
}