:root {
  --bg: #070D1A;
  --surface: #0D1628;
  --surface-2: #12203A;
  --border: #1B2E4A;
  --fg: #E8EFF8;
  --fg-muted: #6B8BAD;
  --accent: #00D9B5;
  --accent-dim: rgba(0, 217, 181, 0.12);
  --warn: #FFB547;
  --danger: #FF5C6A;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(7, 13, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--fg);
  letter-spacing: -0.01em;
}
.nav-tagline {
  font-size: 0.8rem;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* HERO */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 8rem 2rem 6rem;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}
.hero-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(ellipse at center, rgba(0, 217, 181, 0.08) 0%, transparent 65%);
}
.hero-inner {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
}
.hero-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(0, 217, 181, 0.3);
  border-radius: 100px;
  padding: 0.35rem 1rem;
  margin-bottom: 2rem;
  background: var(--accent-dim);
}
.hero-headline {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 1.5rem;
}
.hero-lede {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 560px;
  margin: 0 auto 3rem;
  line-height: 1.7;
}

/* Diagram */
.hero-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 1.5rem;
}
.diagram-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}
.diagram-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg-muted);
}
.diagram-icon--crm { color: #A78BFA; }
.diagram-icon--books { color: #34D399; }
.diagram-label {
  font-size: 0.75rem;
  color: var(--fg-muted);
  font-weight: 500;
}
.diagram-pipe {
  display: flex;
  align-items: center;
  gap: 0;
  position: relative;
  width: 80px;
}
.pipe-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border), rgba(0,217,181,0.4));
}
.pipe-line:last-child {
  background: linear-gradient(270deg, var(--border), rgba(0,217,181,0.4));
}
.pipe-agent {
  position: relative;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.agent-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  position: relative;
  z-index: 1;
}
.agent-pulse {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: rgba(0, 217, 181, 0.25);
  animation: pulse-ring 2s ease-out infinite;
}
@keyframes pulse-ring {
  0% { transform: scale(0.8); opacity: 0.8; }
  100% { transform: scale(1.8); opacity: 0; }
}
.hero-sub {
  font-size: 0.875rem;
  color: var(--fg-muted);
  opacity: 0.7;
}

/* HOW SECTION */
.how {
  padding: 6rem 2rem;
  border-top: 1px solid var(--border);
}
.how-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.section-label {
  font-family: 'Syne', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 3rem;
}
.how-steps {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
}
.step {
  flex: 1;
}
.step-num {
  font-family: 'Syne', sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--surface-2);
  line-height: 1;
  margin-bottom: 1rem;
  letter-spacing: -0.03em;
}
.step-title {
  font-family: 'Syne', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 0.75rem;
}
.step-desc {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.65;
}
.step-connector {
  color: var(--border);
  margin-top: 1.5rem;
  flex-shrink: 0;
}

/* FEATURES */
.features {
  padding: 6rem 2rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.features-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.feature-card {
  background: var(--surface);
  padding: 2rem;
  transition: background 0.2s;
}
.feature-card:hover {
  background: var(--surface-2);
}
.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 1.25rem;
}
.feature-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 0.6rem;
}
.feature-desc {
  font-size: 0.85rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* PRINCIPLES */
.principles {
  padding: 7rem 2rem;
}
.principles-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.principles-quote {
  margin-bottom: 4rem;
}
.principles-quote blockquote {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--fg);
  max-width: 680px;
  letter-spacing: -0.02em;
}
.principles-quote blockquote em {
  font-style: normal;
  color: var(--accent);
}
.principles-stack {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.stack-label {
  font-size: 0.8rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}
.stack-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.chip {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--fg-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.3rem 0.85rem;
}

/* CLOSING */
.closing {
  padding: 7rem 2rem;
  border-top: 1px solid var(--border);
}
.closing-inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}
.closing-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--warn);
  border: 1px solid rgba(255, 181, 71, 0.25);
  border-radius: 100px;
  padding: 0.3rem 0.9rem;
  margin-bottom: 2rem;
  background: rgba(255, 181, 71, 0.06);
}
.closing-headline {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--fg);
  margin-bottom: 1.25rem;
}
.closing-body {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--fg-muted);
}
.footer-copy {
  font-size: 0.8rem;
  color: var(--fg-muted);
  opacity: 0.6;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .how-steps {
    flex-direction: column;
    gap: 2.5rem;
  }
  .step-connector {
    display: none;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .hero-diagram {
    transform: scale(0.85);
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}