:root {
  --bg: #0b0f0d;
  --bg-alt: #0f1512;
  --surface: #121a16;
  --surface-border: #1f2b25;
  --text: #eef2ef;
  --text-muted: #9fb0a8;
  --accent: #4ade80;
  --accent-strong: #22c55e;
  --accent-soft: rgba(74, 222, 128, 0.12);
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --radius: 14px;
  --max-width: 1120px;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f7faf8;
    --bg-alt: #eef4f0;
    --surface: #ffffff;
    --surface-border: #dfe8e2;
    --text: #10241a;
    --text-muted: #4d5f56;
    --accent: #16a34a;
    --accent-strong: #15803d;
    --accent-soft: rgba(22, 163, 74, 0.1);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.15;
  margin: 0 0 0.5em;
}

p { margin: 0 0 1em; color: var(--text-muted); }

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--surface-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
}

.logo-mark { color: var(--accent); display: inline-flex; }

.main-nav {
  display: flex;
  gap: 28px;
}

.main-nav a {
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: color 0.15s ease;
}

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

.btn-nav { display: none; }

@media (min-width: 720px) {
  .btn-nav { display: inline-flex; }
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: #06170e;
}

.btn-primary:hover { background: var(--accent-strong); transform: translateY(-1px); }

.btn-ghost {
  border-color: var(--surface-border);
  color: var(--text);
}

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

.btn-large { padding: 16px 32px; font-size: 1.05rem; }

/* Hero */

.hero {
  padding: 96px 0 72px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 480px;
  background: radial-gradient(60% 60% at 50% 0%, var(--accent-soft), transparent 70%);
  pointer-events: none;
}

.hero-inner { position: relative; max-width: 760px; }

.eyebrow {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  font-weight: 700;
  color: var(--text);
}

.highlight { color: var(--accent); }

.hero-sub {
  font-size: 1.15rem;
  max-width: 560px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 28px 0 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 24px;
  max-width: 680px;
  padding-top: 28px;
  border-top: 1px solid var(--surface-border);
}

.hero-stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--text);
}

.hero-stats span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Sections */

.section { padding: 88px 0; }

.section-alt { background: var(--bg-alt); }

.section-title {
  font-size: clamp(1.7rem, 3.5vw, 2.3rem);
  color: var(--text);
}

.section-sub {
  max-width: 560px;
  font-size: 1.05rem;
  margin-bottom: 48px;
}

/* Cards */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

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

.card-icon { font-size: 1.8rem; margin-bottom: 14px; }

.card h3 { font-size: 1.1rem; color: var(--text); }

.card p { font-size: 0.95rem; margin-bottom: 0; }

/* Process */

.process-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 28px;
}

.process-list li {
  display: flex;
  gap: 16px;
}

.process-num {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--accent);
  font-size: 1.4rem;
  flex-shrink: 0;
}

.process-list h3 { font-size: 1.05rem; color: var(--text); }

.process-list p { font-size: 0.95rem; margin-bottom: 0; }

/* Use cases */

.usecases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.usecase {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 20px;
}

.usecase h3 { font-size: 1.05rem; color: var(--text); }

.usecase p { font-size: 0.95rem; margin-bottom: 0; }

/* FAQ */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 760px;
}

.faq-list details {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 18px 22px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  font-size: 1rem;
}

.faq-list p {
  margin: 14px 0 0;
  font-size: 0.95rem;
}

/* CTA */

.cta-section { text-align: center; }

.cta-inner {
  max-width: 620px;
}

.cta-section h2 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  color: var(--text);
}

.cta-section p { font-size: 1.05rem; }

/* Footer */

.site-footer {
  border-top: 1px solid var(--surface-border);
  padding: 28px 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-inner a:hover { color: var(--accent); }