@font-face {
  font-family: "Pretendard";
  src: url("./assets/fonts/Pretendard-Regular.otf") format("opentype");
  font-weight: 400;
}

@font-face {
  font-family: "Pretendard";
  src: url("./assets/fonts/Pretendard-SemiBold.otf") format("opentype");
  font-weight: 600;
}

@font-face {
  font-family: "Pretendard";
  src: url("./assets/fonts/Pretendard-Bold.otf") format("opentype");
  font-weight: 700;
}

:root {
  --background: #f6fbf8;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-strong: #ffffff;
  --text: #0d1b2a;
  --muted: rgba(13, 27, 42, 0.68);
  --line: rgba(22, 42, 66, 0.08);
  --mint: #1aa577;
  --mint-dark: #0f7d5a;
  --coral: #ffb49f;
  --sky: #9dd0ff;
  --shadow: 0 24px 80px rgba(44, 78, 108, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Pretendard", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(169, 236, 207, 0.72), transparent 28%),
    radial-gradient(circle at top right, rgba(157, 208, 255, 0.5), transparent 30%),
    radial-gradient(circle at 88% 54%, rgba(255, 204, 189, 0.42), transparent 24%),
    linear-gradient(180deg, #f8fbff 0%, #eef7f8 55%, #f6fbf7 100%);
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
  background: rgba(248, 252, 255, 0.82);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  box-shadow: 0 10px 24px rgba(44, 134, 103, 0.18);
}

.nav-links {
  display: flex;
  gap: 10px;
  align-items: center;
}

.nav-links a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.nav-links a:hover {
  background: rgba(255, 255, 255, 0.8);
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.98fr);
  align-items: center;
  gap: clamp(42px, 6vw, 96px);
  min-height: calc(100vh - 80px);
  padding: 72px clamp(20px, 6vw, 96px) 96px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--mint);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  word-break: keep-all;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(44px, 7vw, 92px);
  line-height: 0.98;
  letter-spacing: -0.06em;
}

h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

h3 {
  margin: 0 0 10px;
  font-size: 22px;
  letter-spacing: -0.03em;
}

.hero-description {
  max-width: 660px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.65;
  letter-spacing: -0.025em;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 14px 20px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
}

.button.primary {
  background: linear-gradient(135deg, var(--mint), var(--mint-dark));
  color: #fff;
  box-shadow: 0 16px 34px rgba(26, 165, 119, 0.22);
}

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

.hero-visual {
  position: relative;
  min-height: 660px;
}

.phone-card {
  position: absolute;
  width: min(58vw, 330px);
  overflow: hidden;
  border: 10px solid rgba(255, 255, 255, 0.82);
  border-radius: 46px;
  background: #fff;
  box-shadow: var(--shadow);
}

.phone-card img {
  display: block;
  width: 100%;
}

.card-front {
  right: 8%;
  top: 26px;
  transform: rotate(2deg);
}

.card-back {
  left: 4%;
  top: 148px;
  opacity: 0.94;
  transform: rotate(-7deg) scale(0.92);
}

.section {
  padding: 92px clamp(20px, 6vw, 96px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 32px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.support-card {
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.54);
  border-radius: 30px;
  background: var(--surface);
  box-shadow: 0 18px 48px rgba(44, 78, 108, 0.09);
}

.feature-card p,
.support-card p,
.support-card li {
  color: var(--muted);
  line-height: 1.7;
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin-bottom: 22px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(169, 236, 207, 0.9), rgba(157, 208, 255, 0.7));
  color: #0f7d5a;
  font-weight: 800;
}

.screenshots-section {
  overflow: hidden;
}

.screenshot-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(220px, 1fr));
  gap: 18px;
}

figure {
  margin: 0;
  padding: 14px 14px 18px;
  border-radius: 34px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 18px 48px rgba(44, 78, 108, 0.1);
}

figure img {
  display: block;
  width: 100%;
  border-radius: 26px;
}

figcaption {
  padding-top: 14px;
  color: var(--muted);
  font-weight: 700;
  text-align: center;
}

.cta-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 clamp(20px, 6vw, 96px) 80px;
  padding: 42px;
  border-radius: 36px;
  background:
    radial-gradient(circle at 12% 0%, rgba(255, 204, 189, 0.46), transparent 32%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(239, 255, 250, 0.86));
  box-shadow: var(--shadow);
}

.support-hero {
  max-width: 900px;
  padding: 96px clamp(20px, 6vw, 96px) 48px;
}

.support-hero p:not(.eyebrow) {
  color: var(--muted);
  font-size: 20px;
  line-height: 1.7;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  padding-top: 24px;
}

.support-card ul {
  margin: 0;
  padding-left: 20px;
}

.text-link {
  color: var(--mint-dark);
  font-weight: 800;
}

.policy-hero {
  padding-bottom: 24px;
}

.policy-updated {
  margin-top: 18px;
  font-size: 16px;
  font-weight: 700;
}

.policy-content {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding-top: 24px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(20px, 6vw, 96px);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer a {
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: flex-end;
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-visual {
    min-height: 560px;
  }

  .feature-grid,
  .support-grid,
  .policy-content {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .screenshot-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cta-section {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
    justify-content: space-between;
  }

  .hero {
    padding-top: 52px;
  }

  .hero-visual {
    min-height: 440px;
  }

  .phone-card {
    width: min(70vw, 260px);
    border-width: 8px;
    border-radius: 36px;
  }

  .card-front {
    right: 0;
  }

  .card-back {
    left: 0;
  }

  .feature-grid,
  .support-grid,
  .policy-content,
  .screenshot-row {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
  }
}