/* AI Frontly — one-page site. Pure CSS, system font stack, no external assets. */

:root {
  --teal: #0f766e;
  --teal-dark: #0b5f58;
  --ink: #1f2937;
  --muted: #5b6572;
  --bg: #ffffff;
  --bg-alt: #f6f9f8;
  --border: #e3e9e7;
  --radius: 12px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

.container.narrow { max-width: 680px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--teal);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav nav a {
  color: var(--ink);
  text-decoration: none;
  margin-left: 28px;
  font-size: 0.95rem;
}

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

.nav-cta {
  border: 1px solid var(--teal);
  color: var(--teal) !important;
  padding: 8px 18px;
  border-radius: 999px;
  font-weight: 600;
}

.nav-cta:hover { background: var(--teal); color: #fff !important; }

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 88px;
  background: linear-gradient(180deg, #f2f8f7 0%, #ffffff 100%);
  text-align: center;
}

.eyebrow {
  color: var(--teal);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.subhead {
  color: var(--muted);
  font-size: 1.15rem;
  max-width: 640px;
  margin: 0 auto 36px;
}

.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 13px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  font-family: inherit;
}

.btn-primary { background: var(--teal); color: #fff; }
.btn-primary:hover { background: var(--teal-dark); }

.btn-secondary { border-color: var(--border); color: var(--ink); background: #fff; }
.btn-secondary:hover { border-color: var(--teal); color: var(--teal); }

/* ---------- Sections ---------- */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }

.section h2 {
  font-size: 1.9rem;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  text-align: center;
}

.section-intro {
  color: var(--muted);
  text-align: center;
  margin-bottom: 48px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

#about p { text-align: center; color: var(--muted); }

/* ---------- Cards ---------- */
.group-title {
  text-align: center;
  font-size: 1.05rem;
  color: var(--teal);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 44px 0 24px;
}

.group-title:first-of-type { margin-top: 0; }

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

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: 0 2px 10px rgba(15, 118, 110, 0.05);
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
  color: var(--teal-dark);
}

.card p { color: var(--muted); font-size: 0.98rem; }

/* ---------- Steps ---------- */
.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: step;
}

.steps li {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--teal);
  color: #fff;
  font-weight: 700;
  margin-bottom: 16px;
}

.steps h3 { font-size: 1.1rem; margin-bottom: 10px; }
.steps p { color: var(--muted); font-size: 0.96rem; }

/* ---------- Contact ---------- */
.email-line { text-align: center; margin: 8px 0 40px; }

.contact-form {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
}

.field { margin-bottom: 20px; }

.field label {
  display: block;
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 8px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--ink);
  background: #fff;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
}

.contact-form .btn { width: 100%; margin-top: 4px; }

.form-note {
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .cards, .steps { grid-template-columns: 1fr; }
  .hero { padding: 72px 0 64px; }
  .section { padding: 60px 0; }
  .nav nav a { margin-left: 16px; font-size: 0.88rem; }
  .nav-cta { padding: 6px 14px; }
  .contact-form { padding: 28px 20px; }
}