:root {
  color-scheme: light;
  --ink: #17221c;
  --muted: #647068;
  --green: #147a4b;
  --green-dark: #0e5c38;
  --mint: #e8f7ee;
  --cream: #fbfaf5;
  --line: #dfe6e1;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: Pretendard, "Noto Sans KR", system-ui, sans-serif;
}

button, a { font: inherit; }
button { cursor: pointer; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 22px 0;
}

.brand {
  color: var(--green-dark);
  font-size: 1.35rem;
  font-weight: 900;
  text-decoration: none;
}

.login-button,
.primary-button {
  border: 0;
  border-radius: 999px;
  font-weight: 800;
}

.login-button {
  padding: 10px 16px;
  color: var(--ink);
  background: #fee500;
}

.hero {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
  padding: 86px 0 104px;
  text-align: center;
}

.eyebrow,
.section-label {
  margin: 0 0 18px;
  color: var(--green);
  font-size: .85rem;
  font-weight: 900;
  letter-spacing: .08em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.5rem, 8vw, 5rem);
  line-height: 1.08;
  letter-spacing: -.06em;
}

.hero h1 span { color: var(--green); }

.hero-copy {
  max-width: 560px;
  margin: 28px auto 0;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.75;
}

.primary-button {
  margin-top: 34px;
  padding: 16px 26px;
  color: white;
  background: var(--green);
  box-shadow: 0 12px 30px rgb(20 122 75 / 20%);
}

.primary-button:hover { background: var(--green-dark); }

.privacy-note {
  margin-top: 16px;
  color: var(--muted);
  font-size: .8rem;
}

.steps {
  padding: 80px max(20px, calc((100% - 1040px) / 2));
  background: white;
}

.steps h2 {
  margin: 0 0 34px;
  font-size: clamp(1.8rem, 5vw, 3rem);
  letter-spacing: -.04em;
}

.steps ol {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  min-height: 210px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--cream);
  counter-increment: step;
}

.steps li::before {
  content: "0" counter(step);
  display: block;
  margin-bottom: 48px;
  color: var(--green);
  font-weight: 900;
}

.steps strong,
.steps span { display: block; }
.steps strong { margin-bottom: 10px; }
.steps span { color: var(--muted); line-height: 1.55; }

.notice-dialog {
  width: min(420px, calc(100% - 40px));
  padding: 28px;
  border: 0;
  border-radius: 24px;
  box-shadow: 0 24px 80px rgb(23 34 28 / 25%);
}

.notice-dialog::backdrop { background: rgb(23 34 28 / 45%); }
.notice-dialog h2 { margin-top: 0; }
.notice-dialog p { color: var(--muted); line-height: 1.6; }
.notice-dialog button { width: 100%; padding: 13px; border: 0; border-radius: 12px; color: white; background: var(--green); font-weight: 800; }

@media (max-width: 720px) {
  .site-header { width: min(100% - 28px, 1120px); }
  .site-header .login-button { padding: 9px 12px; font-size: .8rem; }
  .hero { width: min(100% - 32px, 760px); padding: 64px 0 80px; }
  .steps { padding: 64px 16px; }
  .steps ol { grid-template-columns: 1fr; }
  .steps li { min-height: auto; }
  .steps li::before { margin-bottom: 30px; }
}