:root {
  --bg: #f6fbf7;
  --bg-alt: #ecfdf3;
  --text: #14532d;
  --muted: #4b6b55;
  --accent: #059669;
  --accent-light: #34d399;
  --card: #ffffff;
  --border: #bbf7d0;
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "DM Sans", system-ui, sans-serif;
  --radius: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
.container { max-width: 1080px; margin: 0 auto; padding: 0 1.25rem; }

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 251, 247, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}
.logo {
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 0.9rem;
}
.logo b { color: var(--accent); font-weight: 600; }
.nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 500;
}
.nav a:hover { color: var(--accent); }
.menu-btn { display: none; border: none; background: none; font-size: 1.4rem; }

.hero {
  padding: 4rem 0 3rem;
  background: linear-gradient(180deg, #ecfdf5 0%, var(--bg) 100%);
}
.hero-tag {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 600;
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  margin: 0.75rem 0;
  max-width: 720px;
}
.hero h1 em { font-style: italic; color: var(--accent); }
.hero-desc { max-width: 620px; color: var(--muted); font-size: 1.05rem; }
.hero-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1.25rem 0; }
.hero-chips span {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--accent);
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.5rem 0; }
.btn-primary, .btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 0.85rem 1.4rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 24px rgba(5, 150, 105, 0.25);
}
.btn-primary:hover { transform: translateY(-2px); }
.btn-ghost {
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--card);
}
.btn-lg { padding: 1rem 2rem; font-size: 1rem; }
.hero-note {
  font-size: 0.88rem;
  color: var(--muted);
  max-width: 600px;
  padding: 1rem;
  background: var(--card);
  border-radius: var(--radius);
  border-left: 4px solid var(--accent-light);
}

.section { padding: 3.5rem 0; }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 680px; margin-bottom: 2rem; }
.kicker {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 600;
}
.section-head h2 {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 400;
  margin: 0.5rem 0;
}
.section-head p { color: var(--muted); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.card-icon { font-size: 1.8rem; }
.card h3 { margin: 0.75rem 0 0.35rem; font-size: 1.05rem; }
.card p { margin: 0; font-size: 0.9rem; color: var(--muted); }

.steps {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
  display: grid;
  gap: 0.75rem;
}
.steps li {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  font-size: 0.95rem;
  color: var(--muted);
}
.steps strong { color: var(--accent); }
.cta-block { text-align: center; }

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
}
.tech-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  text-align: center;
}
.tech-footer {
  margin-top: 2rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.92rem;
}
.tech-footer a { color: var(--accent); font-weight: 600; }

.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  background: var(--card);
}
.footer-inner { text-align: center; font-size: 0.82rem; color: var(--muted); }
.footer a { color: var(--accent); }

.reveal { opacity: 0; transform: translateY(16px); transition: 0.6s ease; }
.reveal.on { opacity: 1; transform: none; }

@media (max-width: 768px) {
  .nav { display: none; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card);
    padding: 1rem;
    border-bottom: 1px solid var(--border);
  }
  .menu-btn { display: block; }
}