:root {
  --bg-primary: #0a0f1a;
  --bg-secondary: #111827;
  --bg-card: #1a2235;
  --bg-card-accent: #0d2a1f;
  --fg-primary: #f0f2f5;
  --fg-secondary: #9ca3af;
  --fg-muted: #6b7280;
  --accent: #22d3a7;
  --accent-dim: #14a07d;
  --accent-glow: rgba(34, 211, 167, 0.15);
  --red-muted: #f87171;
  --border: #1e293b;
  --radius: 12px;
  --max-width: 1100px;
}

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

body {
  background: var(--bg-primary);
  color: var(--fg-primary);
  font-family: 'DM Sans', sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-top: 60px;
}

h1, h2, h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  line-height: 1.15;
}

/* ===== HERO ===== */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding: 80px 24px 60px;
  background:
    radial-gradient(ellipse 60% 50% at 20% 50%, rgba(34, 211, 167, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 80% 30%, rgba(34, 211, 167, 0.04) 0%, transparent 60%),
    var(--bg-primary);
}

.hero-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-glow);
  border: 1px solid var(--accent-dim);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  margin-bottom: 24px;
  color: var(--fg-primary);
}

.hero h1 .accent {
  color: var(--accent);
}

.lede {
  font-size: 1.15rem;
  color: var(--fg-secondary);
  max-width: 500px;
  line-height: 1.7;
}

/* Nexus visual */
.hero-visual {
  position: relative;
  width: 100%;
  height: 380px;
}

.nexus-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.center-ring {
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--accent-glow);
  animation: pulse-ring 3s ease-in-out infinite;
}

@keyframes pulse-ring {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.15); opacity: 0.7; }
}

.center-text {
  position: relative;
  z-index: 1;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--accent);
}

.nexus-node {
  position: absolute;
  text-align: center;
}

.node-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin: 0 auto 6px;
}

.node-label {
  font-size: 0.75rem;
  color: var(--fg-secondary);
  font-weight: 500;
}

.node-1 { top: 10%; left: 10%; }
.node-2 { top: 10%; right: 10%; }
.node-3 { bottom: 10%; left: 15%; }
.node-4 { bottom: 10%; right: 15%; }

.nexus-line {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-dim), transparent);
  opacity: 0.4;
}

.line-1 { top: 18%; left: 22%; width: 28%; transform: rotate(25deg); }
.line-2 { top: 18%; right: 22%; width: 28%; transform: rotate(-25deg); }
.line-3 { bottom: 22%; left: 27%; width: 23%; transform: rotate(-20deg); }
.line-4 { bottom: 22%; right: 27%; width: 23%; transform: rotate(20deg); }

/* ===== PROBLEM ===== */
.problem {
  padding: 100px 24px;
  background: var(--bg-secondary);
}

.problem-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.problem h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: 48px;
  text-align: center;
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.problem-card {
  padding: 36px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.problem-card.old {
  background: var(--bg-card);
}

.problem-card.new {
  background: var(--bg-card-accent);
  border-color: var(--accent-dim);
}

.card-header {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.problem-card.old .card-header { color: var(--red-muted); }
.problem-card.new .card-header { color: var(--accent); }

.problem-card ul {
  list-style: none;
  margin-bottom: 20px;
}

.problem-card li {
  padding: 6px 0;
  color: var(--fg-secondary);
  font-size: 0.95rem;
  padding-left: 20px;
  position: relative;
}

.problem-card.old li::before {
  content: '\2717';
  position: absolute;
  left: 0;
  color: var(--red-muted);
  opacity: 0.7;
}

.problem-card.new li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--accent);
  opacity: 0.8;
}

.card-verdict {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--fg-muted);
}

.card-verdict.accent { color: var(--accent); }

/* ===== HOW / METRICS ===== */
.how {
  padding: 100px 24px;
  background: var(--bg-primary);
}

.how-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.how h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: 56px;
}

.metrics-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 48px;
}

.metric {
  padding: 40px 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.metric-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.metric-label {
  font-size: 0.9rem;
  color: var(--fg-secondary);
}

.how-note {
  font-size: 1.05rem;
  color: var(--fg-secondary);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== VERTICALS ===== */
.verticals {
  padding: 100px 24px;
  background: var(--bg-secondary);
}

.verticals-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.verticals h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  text-align: center;
  margin-bottom: 56px;
}

.vertical-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.vertical-item {
  padding: 32px 28px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: border-color 0.2s, transform 0.2s;
}

.vertical-item:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.v-icon {
  font-size: 1.8rem;
  margin-bottom: 16px;
}

.v-title {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.v-desc {
  font-size: 0.88rem;
  color: var(--fg-secondary);
  line-height: 1.6;
}

/* ===== CLOSING ===== */
.closing {
  padding: 100px 24px;
  background:
    radial-gradient(ellipse 50% 60% at 50% 80%, rgba(34, 211, 167, 0.06) 0%, transparent 70%),
    var(--bg-primary);
}

.closing-inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.closing h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 24px;
}

.closing p {
  font-size: 1.05rem;
  color: var(--fg-secondary);
  margin-bottom: 20px;
  line-height: 1.7;
}

.closing-bold {
  color: var(--fg-primary) !important;
  font-weight: 600;
  font-size: 1.15rem !important;
}

.closing-light {
  color: var(--accent) !important;
  font-style: italic;
  font-size: 1rem !important;
}

/* ===== NAV ===== */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 15, 26, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--fg-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-link:hover { color: var(--accent); }

/* ===== FOOTER ===== */
.site-footer {
  padding: 48px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-primary);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--accent);
  margin-bottom: 6px;
}

.footer-tagline {
  font-size: 0.85rem;
  color: var(--fg-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero { min-height: auto; padding: 60px 20px 40px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { height: 280px; }
  .problem-grid { grid-template-columns: 1fr; }
  .metrics-row { grid-template-columns: 1fr; gap: 16px; }
  .vertical-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .metric { padding: 28px 20px; }
  .metric-number { font-size: 2.2rem; }
}

@media (max-width: 480px) {
  .vertical-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2rem; }
}