:root {
  color-scheme: light;
  --background: #f7f8fb;
  --surface: #ffffff;
  --surface-strong: #111827;
  --text: #172033;
  --muted: #667085;
  --line: #e4e7ec;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #dbeafe;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.16), transparent 32rem),
    var(--background);
  color: var(--text);
  font-family:
    Inter, Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(228, 231, 236, 0.7);
  background: rgba(247, 248, 251, 0.82);
  backdrop-filter: blur(18px);
}

.nav,
.hero,
.section,
.policy,
.footer {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.logo {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.nav-links {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-links a:hover,
.footer a:hover,
.app-card a:hover {
  color: var(--primary);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: 48px;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 84px 0;
}

.eyebrow,
.card-kicker {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 24px;
  font-size: clamp(2.8rem, 8vw, 5.75rem);
  line-height: 0.98;
  letter-spacing: -0.075em;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.05;
  letter-spacing: -0.055em;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.25rem;
}

.hero-text {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.12rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 999px;
  padding: 0 22px;
  font-weight: 750;
}

.button.primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.28);
}

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

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.8);
}

.hero-card {
  border: 1px solid var(--line);
  border-radius: 32px;
  padding: 30px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.95), rgba(219, 234, 254, 0.78)),
    var(--surface);
  box-shadow: var(--shadow);
}

.hero-card strong {
  display: block;
  margin-bottom: 16px;
  font-size: 2rem;
  line-height: 1.08;
  letter-spacing: -0.05em;
}

.hero-card p,
.app-card p,
.contact-box p,
.policy p,
.policy li {
  color: var(--muted);
}

.section {
  padding: 88px 0;
}

.section-heading {
  margin-bottom: 28px;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.app-card,
.contact-box {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 12px 36px rgba(15, 23, 42, 0.07);
}

.app-card {
  display: flex;
  gap: 18px;
  padding: 24px;
}

.app-icon {
  display: grid;
  flex: 0 0 58px;
  width: 58px;
  height: 58px;
  place-items: center;
  border-radius: 18px;
  background: var(--surface-strong);
  color: white;
  font-weight: 900;
}

.app-card a,
.contact-box a,
.policy a {
  color: var(--primary);
  font-weight: 750;
}

.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 28px;
  align-items: start;
}

.contact-box {
  padding: 28px;
}

.policy {
  max-width: 860px;
  padding: 84px 0;
}

.policy .updated {
  margin-bottom: 42px;
}

.policy section {
  border-top: 1px solid var(--line);
  padding: 28px 0;
}

.policy ul {
  padding-left: 1.2rem;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--line);
  padding: 26px 0 36px;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer p {
  margin: 0;
}

.footer div {
  display: flex;
  gap: 18px;
}

@media (max-width: 760px) {
  .nav,
  .footer,
  .split {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: center;
    padding: 16px 0;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 14px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 58px 0;
  }

  .section {
    padding: 58px 0;
  }

  .split {
    display: flex;
  }

  .footer {
    display: flex;
  }
}