:root {
  color-scheme: light;
  --bg: #f8faf9;
  --surface: #ffffff;
  --text: #17201f;
  --muted: #5f6d6a;
  --line: #dce6e3;
  --accent: #087a73;
  --accent-dark: #055d58;
  --accent-soft: #dff3ef;
  --shadow: 0 28px 80px rgba(31, 47, 44, 0.14);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  letter-spacing: 0;
}

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

.site-header {
  align-items: center;
  background: rgba(248, 250, 249, 0.88);
  border-bottom: 1px solid rgba(220, 230, 227, 0.8);
  backdrop-filter: blur(18px);
  display: flex;
  height: 72px;
  justify-content: space-between;
  left: 0;
  padding: 0 clamp(20px, 5vw, 72px);
  position: sticky;
  right: 0;
  top: 0;
  z-index: 10;
}

.brand {
  align-items: center;
  display: inline-flex;
  font-size: 17px;
  font-weight: 700;
  gap: 10px;
}

.brand-mark {
  align-items: center;
  background: var(--text);
  border-radius: 7px;
  color: white;
  display: inline-flex;
  height: 30px;
  justify-content: center;
  width: 30px;
}

.brand-mark svg {
  height: 22px;
  width: 22px;
}

.brand-mark path:first-child {
  fill: currentColor;
  opacity: 0.18;
}

.brand-mark path:last-child {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

nav {
  align-items: center;
  display: flex;
  gap: 24px;
}

nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.nav-download {
  background: var(--accent);
  border-radius: 8px;
  color: white;
  padding: 12px 18px;
}

.language-link {
  border-left: 1px solid var(--line);
  padding-left: 24px;
}

.hero {
  align-items: center;
  display: flex;
  min-height: 620px;
  padding-bottom: 76px;
  padding-top: clamp(54px, 8vw, 108px);
}

.section-grid {
  align-items: center;
  display: grid;
  gap: clamp(40px, 8vw, 112px);
  grid-template-columns: minmax(0, 0.92fr) minmax(380px, 1fr);
  margin: 0 auto;
  max-width: 1240px;
  padding-inline: clamp(20px, 5vw, 72px);
}

.hero-copy {
  margin: 0 auto;
  max-width: 840px;
  padding-inline: clamp(20px, 5vw, 72px);
  text-align: center;
}

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

h1 {
  font-size: clamp(54px, 7vw, 92px);
  font-weight: 760;
  line-height: 0.96;
}

:lang(ko) h1,
:lang(ko) h2,
:lang(ko) h3,
:lang(ko) p,
:lang(ko) a,
:lang(ko) strong,
:lang(ko) span {
  word-break: keep-all;
}

:lang(ko) h1 {
  font-size: clamp(48px, 6.2vw, 84px);
  line-height: 1.04;
}

.hero-body {
  color: var(--muted);
  font-size: clamp(19px, 2vw, 23px);
  line-height: 1.45;
  margin-top: 28px;
  margin-inline: auto;
  max-width: 650px;
}

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

.button {
  align-items: center;
  border-radius: 8px;
  display: inline-flex;
  font-size: 15px;
  font-weight: 700;
  height: 48px;
  justify-content: center;
  padding: 0 22px;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background: var(--accent);
  box-shadow: 0 14px 28px rgba(8, 122, 115, 0.2);
  color: white;
}

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

.button.secondary {
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--text);
}

.button.compact {
  height: 44px;
}

.hero-note {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  margin-top: 18px;
}

.download-strip,
.content-section,
.split-section,
.caveat-section,
.release-notes,
.site-footer {
  margin: 0 auto;
  max-width: 1100px;
  padding-inline: clamp(20px, 5vw, 72px);
}

.download-strip {
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  margin-top: 28px;
  padding-block: 24px;
}

.download-strip h2 {
  font-size: 24px;
}

.download-strip p {
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  margin-top: 7px;
}

.content-section {
  padding-top: 104px;
}

.section-heading {
  display: grid;
  gap: 16px;
  grid-template-columns: 0.72fr 1fr;
}

.section-heading h2,
.split-section h2,
.caveat-section h2,
.release-notes h2 {
  font-size: clamp(36px, 4.4vw, 58px);
  line-height: 1;
}

.section-heading p,
.split-section p,
.caveat-section p,
.release-notes p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
}

.steps {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 40px;
}

.steps article {
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
}

.step-icon {
  align-items: center;
  background: #edf4f2;
  border-radius: 999px;
  color: var(--accent);
  display: inline-flex;
  height: 74px;
  justify-content: center;
  margin-bottom: 30px;
  width: 74px;
}

.step-icon svg {
  fill: none;
  height: 34px;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
  width: 34px;
}

.steps h3 {
  font-size: 23px;
}

.steps p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
  margin-top: 12px;
}

.split-section {
  align-items: start;
  display: grid;
  gap: 56px;
  grid-template-columns: 0.9fr 1fr;
  padding-top: 108px;
}

.split-section p {
  margin-top: 20px;
}

.permission-list {
  display: grid;
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.permission-list li {
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  padding: 18px 20px;
}

.permission-list span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.permission-list strong {
  font-size: 15px;
}

.caveat-section {
  align-items: end;
  display: grid;
  gap: 48px;
  grid-template-columns: 1fr 1fr;
  padding-top: 104px;
}

.caveat-section p {
  margin-top: 18px;
}

.caveats {
  border-left: 1px solid var(--line);
  display: grid;
}

.caveats p {
  border-top: 1px solid var(--line);
  color: var(--text);
  font-size: 18px;
  font-weight: 740;
  margin: 0;
  padding: 20px 0 20px 28px;
}

.caveats p:last-child {
  border-bottom: 1px solid var(--line);
}

.release-notes {
  padding-bottom: 106px;
  padding-top: 92px;
}

.release-notes p {
  margin-top: 18px;
  max-width: 720px;
}

.site-footer {
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  font-size: 14px;
  font-weight: 700;
  justify-content: space-between;
  max-width: none;
  padding-block: 28px;
}

.site-footer a {
  color: var(--accent);
}

@media (max-width: 900px) {
  nav {
    gap: 12px;
  }

  .section-heading,
  .split-section,
  .caveat-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-bottom: 60px;
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
    height: auto;
    padding-block: 18px;
  }

  nav {
    flex-wrap: wrap;
  }

  .language-link {
    border-left: 0;
    padding-left: 0;
  }

  h1 {
    font-size: clamp(46px, 14vw, 64px);
  }

  :lang(ko) h1 {
    font-size: clamp(42px, 11vw, 56px);
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .download-strip {
    align-items: start;
    flex-direction: column;
    gap: 18px;
  }

  .permission-list li {
    align-items: start;
    flex-direction: column;
    gap: 7px;
  }
}

@media (max-width: 560px) {
  .hero-actions,
  .button {
    width: 100%;
  }

  .site-footer {
    align-items: start;
    flex-direction: column;
    gap: 8px;
  }
}