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

:root {
  --ink: #0f0f0d;
  --ink-muted: #5a5a55;
  --ink-faint: #9a9a93;
  --surface: #f7f6f2;
  --surface-card: #ffffff;
  --accent: #1a6b4a;
  --accent-light: #e8f4ee;
  --accent-mid: #2d9166;
  --border: rgba(15,15,13,0.1);
  --border-strong: rgba(15,15,13,0.18);
  --pulse: #00c97a;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background: var(--surface);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

.mono { font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace; }
.serif { font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; }

/* NAV */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 2.5rem;
  background: rgba(247,246,242,0.88);
  backdrop-filter: blur(12px);
  border-bottom: 0.5px solid var(--border);
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace, monospace; font-size: 15px; font-weight: 500;
  color: var(--ink); text-decoration: none;
}
.logo-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--pulse);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.75); }
}
.nav-cta {
  font-size: 13px; font-weight: 500;
  padding: 0.5rem 1.25rem;
  background: var(--ink); color: var(--surface);
  border-radius: 100px; text-decoration: none;
  transition: opacity 0.2s;
}
.nav-cta:hover { opacity: 0.8; }

.lang-switch {
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace, monospace;
  font-size: 12px; color: var(--ink-muted);
  text-decoration: none;
  padding: 0.3rem 0.6rem;
  border: 0.5px solid var(--border-strong);
  border-radius: 100px;
  transition: color 0.2s, border-color 0.2s;
}
.lang-switch:hover { color: var(--ink); border-color: var(--ink); }

.nav-right {
  display: flex; align-items: center; gap: 10px;
}

/* HERO */
.hero {
  min-height: 100vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 8rem 2rem 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero-grid-bg {
  position: absolute; inset: 0; z-index: 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% 40%, black 40%, transparent 100%);
}
.hero-eyebrow {
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace, monospace;
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent-mid);
  background: var(--accent-light);
  padding: 0.3rem 0.85rem; border-radius: 100px;
  margin-bottom: 1.75rem;
  position: relative; z-index: 1;
}
.hero h1 {
  font-size: clamp(2.6rem, 6vw, 5rem);
  font-weight: 300;
  line-height: 1.08;
  max-width: 780px;
  margin-bottom: 1.5rem;
  position: relative; z-index: 1;
}
.hero h1 em {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif, serif;
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--ink-muted);
  max-width: 520px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
  position: relative; z-index: 1;
}
.hero-actions {
  display: flex; gap: 12px; flex-wrap: wrap; justify-content: center;
  position: relative; z-index: 1;
  margin-bottom: 4rem;
}
.btn-primary {
  padding: 0.75rem 2rem;
  background: var(--ink); color: var(--surface);
  border-radius: 100px; font-size: 15px; font-weight: 500;
  text-decoration: none; transition: opacity 0.2s;
  cursor: pointer;
}
.btn-primary:hover { opacity: 0.8; }
.btn-ghost {
  padding: 0.75rem 1.75rem;
  border: 1px solid var(--border-strong); border-radius: 100px;
  font-size: 15px; color: var(--ink);
  text-decoration: none; transition: background 0.2s;
  cursor: pointer;
}
.btn-ghost:hover { background: rgba(15,15,13,0.04); }

/* FLOW DIAGRAM */
.flow-strip {
  position: relative; z-index: 1;
  display: flex; align-items: center; gap: 0;
  background: var(--surface-card);
  border: 0.5px solid var(--border-strong);
  border-radius: 16px;
  padding: 1rem 1.5rem;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace, monospace;
  font-size: 12px;
  overflow: hidden;
}
.flow-node {
  padding: 0.35rem 0.75rem;
  border-radius: 8px;
  white-space: nowrap;
}
.hero-made-by {
  position: relative; z-index: 1;
  margin-top: 1.5rem;
  font-size: 13px; color: var(--ink-faint);
}
.hero-made-by a { color: var(--ink-muted); text-decoration: underline; text-underline-offset: 3px; }
.hero-made-by a:hover { color: var(--ink); }

.flow-node.tracker { background: #eef6ff; color: #1a4a8a; }
.flow-node.platform { background: var(--accent-light); color: var(--accent); font-weight: 500; }
.flow-node.output { background: #fef6e4; color: #7a4f0d; }
.flow-arrow {
  flex-shrink: 0; padding: 0 0.5rem;
  color: var(--ink-faint); font-size: 14px;
}

/* SECTION LAYOUT */
section { padding: 5rem 2rem; }
.container { max-width: 1000px; margin: 0 auto; }
.section-label {
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace, monospace;
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink-faint); margin-bottom: 0.75rem;
}
.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 300; line-height: 1.2; margin-bottom: 1rem;
}
.section-title em {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif, serif;
  font-style: italic; color: var(--accent);
}

/* HOW IT WORKS */
.steps {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5px;
  background: var(--border);
  border: 0.5px solid var(--border-strong);
  border-radius: 16px; overflow: hidden;
  margin-top: 3rem;
}
.step {
  background: var(--surface-card);
  padding: 2rem 1.5rem;
}
.step-num {
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace, monospace; font-size: 11px;
  color: var(--ink-faint); margin-bottom: 1rem;
}
.step-title { font-size: 1rem; font-weight: 500; margin-bottom: 0.5rem; }
.step-desc { font-size: 14px; color: var(--ink-muted); line-height: 1.6; }
.step-icon {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--accent-light);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1rem;
}

/* USE CASES */
.use-cases {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px; margin-top: 2.5rem;
}
.use-case-card {
  background: var(--surface-card);
  border: 0.5px solid var(--border);
  border-radius: 14px; padding: 1.5rem;
  transition: border-color 0.2s;
}
.use-case-card:hover { border-color: var(--border-strong); }
.uc-tag {
  display: inline-block;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace, monospace; font-size: 10px;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 0.2rem 0.6rem; border-radius: 100px;
  margin-bottom: 1rem;
}
.uc-tag.b2b { background: #eef6ff; color: #1a4a8a; }
.uc-tag.dev { background: #f0eeff; color: #4a2aa8; }
.uc-tag.research { background: #fff4e4; color: #7a4a0a; }
.use-case-card h3 { font-size: 15px; font-weight: 500; margin-bottom: 0.5rem; }
.use-case-card p { font-size: 14px; color: var(--ink-muted); line-height: 1.6; }

/* TRACKERS */
.tracker-chips {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 2rem;
}
.chip {
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace, monospace; font-size: 11px;
  padding: 0.3rem 0.75rem;
  border: 0.5px solid var(--border-strong);
  border-radius: 100px; color: var(--ink-muted);
  background: var(--surface-card);
}
.chip.more {
  background: var(--accent-light); color: var(--accent);
  border-color: transparent;
}

/* DATA TYPES */
.data-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px; margin-top: 2rem;
}
.data-item {
  background: var(--surface-card);
  border: 0.5px solid var(--border);
  border-radius: 10px; padding: 0.85rem 1rem;
  font-size: 13px; font-weight: 400;
  display: flex; align-items: center; gap: 8px;
}
.data-dot {
  width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0;
}

/* CONTACT SECTION */
.contact-section {
  background: var(--ink);
  color: var(--surface);
  border-radius: 24px;
  padding: 4rem 3rem;
  text-align: center;
}
.contact-section .section-title { color: var(--surface); }
.contact-section .section-title em { color: #6effc4; }
.contact-section p { color: rgba(247,246,242,0.65); margin-bottom: 2.5rem; font-size: 1rem; }
.hubspot-placeholder {
  background: rgba(255,255,255,0.06);
  border: 1px dashed rgba(255,255,255,0.2);
  border-radius: 14px;
  padding: 3rem 2rem;
  max-width: 600px; margin: 0 auto;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace, monospace;
  font-size: 12px; color: rgba(247,246,242,0.4);
  letter-spacing: 0.05em;
}

/* FOOTER */
footer {
  padding: 2rem 2.5rem;
  border-top: 0.5px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 1rem;
}
footer .mono { font-size: 12px; color: var(--ink-faint); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-size: 13px; color: var(--ink-muted); text-decoration: none; }
.footer-links a:hover { color: var(--ink); }

/* ANIMATIONS */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-eyebrow { animation: fade-up 0.5s ease both; }
.hero h1 { animation: fade-up 0.5s 0.1s ease both; }
.hero-sub { animation: fade-up 0.5s 0.2s ease both; }
.hero-actions { animation: fade-up 0.5s 0.3s ease both; }
.flow-strip { animation: fade-up 0.5s 0.4s ease both; }

/* SPLIT LAYOUT */
.split {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 4rem; align-items: center;
}
@media (max-width: 720px) {
  .split { grid-template-columns: 1fr; }
  nav { padding: 1rem 1.25rem; }
  .hero { padding: 7rem 1.25rem 3rem; }
  section { padding: 3.5rem 1.25rem; }
  .contact-section { padding: 2.5rem 1.25rem; }
  footer { padding: 1.5rem 1.25rem; flex-direction: column; align-items: flex-start; }
  .flow-strip { font-size: 10px; padding: 0.75rem 1rem; }
}