:root {
  --green: #1EC677;
  --green-dark: #17a862;
  --ink: #0b1f17;
  --muted: #5b6b63;
  --bg: #f6fbf8;
  --card: #ffffff;
  --line: #e3efe8;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

/* Nav */
nav {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { font-size: 26px; font-weight: 800; letter-spacing: -0.02em; color: var(--green); }
.nav-links { display: flex; gap: 28px; font-size: 14px; font-weight: 600; color: var(--muted); }
.nav-links a:hover { color: var(--green); }
.btn {
  display: inline-block;
  background: var(--green);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  padding: 11px 22px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: background .15s ease;
}
.btn:hover { background: var(--green-dark); }
.btn-ghost { background: transparent; color: var(--green); border: 1.5px solid var(--green); }
.btn-ghost:hover { background: #eafaf1; }

/* Hero */
.hero { padding: 88px 0 64px; text-align: center; }
.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--green-dark);
  background: #e5f8ee;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.hero h1 { font-size: 52px; line-height: 1.08; letter-spacing: -0.03em; margin-bottom: 20px; }
.hero h1 span { color: var(--green); }
.hero p { font-size: 19px; color: var(--muted); max-width: 620px; margin: 0 auto 32px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* Reward badge */
.reward {
  margin: 56px auto 0;
  max-width: 460px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 30px;
  box-shadow: 0 12px 40px rgba(30,198,119,.10);
}
.reward .amt { font-size: 46px; font-weight: 800; color: var(--green); letter-spacing: -0.02em; }
.reward .sub { font-size: 14px; color: var(--muted); }

/* Steps */
.section { padding: 64px 0; }
.section h2 { font-size: 32px; text-align: center; letter-spacing: -0.02em; margin-bottom: 8px; }
.section .lead { text-align: center; color: var(--muted); margin-bottom: 44px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px;
}
.card .num {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: #e5f8ee;
  color: var(--green-dark);
  font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}
.card h3 { font-size: 17px; margin-bottom: 6px; }
.card p { font-size: 14px; color: var(--muted); }

/* Form */
.signup { max-width: 460px; margin: 0 auto; }
.signup form { display: flex; gap: 10px; margin-top: 10px; }
.signup input {
  flex: 1;
  padding: 13px 16px;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  font-size: 15px;
  outline: none;
}
.signup input:focus { border-color: var(--green); }
.fine { font-size: 12px; color: var(--muted); text-align: center; margin-top: 14px; }

/* Footer */
footer { border-top: 1px solid var(--line); padding: 34px 0; color: var(--muted); font-size: 13px; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 38px; }
  .nav-links { display: none; }
}