:root {
  color-scheme: light;
  --ink: #202725;
  --muted: #525c58;
  --line: #d9dfdc;
  --paper: #fbfcfb;
  --white: #ffffff;
  --green: #315b4f;
  --app-background: #edf3ef;
  --rose-background: #f7eeee;
  --disabled-background: #e0e7e3;
}

* {
  box-sizing: border-box;
}

html {
  scroll-padding-top: 24px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Malgun Gothic", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

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

a {
  color: inherit;
  text-underline-offset: 5px;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--green);
  outline-offset: 5px;
}

#about:focus-visible,
#app:focus-visible,
#support:focus-visible,
#faq:focus-visible {
  outline: 3px solid var(--green);
  outline-offset: -3px;
}

.content {
  width: min(100% - 64px, 1080px);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  top: 8px;
  left: 16px;
  z-index: 1;
  padding: 8px 16px;
  color: var(--white);
  background: var(--green);
  border-radius: 4px;
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  min-height: 76px;
  gap: 8px 24px;
  padding-block: 8px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  font-size: 25px;
  font-weight: 700;
  text-decoration: none;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
}

nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--muted);
  font-size: 15px;
  text-decoration: none;
}

nav a:hover {
  color: var(--green);
  text-decoration: underline;
}

.hero {
  padding-block: 56px 64px;
}

.eyebrow {
  margin-bottom: 12px;
  color: var(--green);
  font-size: 15px;
  font-weight: 600;
}

h1 {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px 20px;
  font-size: 88px;
  font-weight: 700;
  line-height: 1.1;
}

.brand-korean {
  color: var(--muted);
  font-size: 24px;
  font-weight: 500;
}

.hero-message {
  margin-top: 24px;
  font-size: 32px;
  font-weight: 500;
  line-height: 1.5;
}

.hero-description {
  max-width: 680px;
  margin-top: 20px;
  color: var(--muted);
  font-size: 18px;
}

.section {
  padding-block: 48px;
}

h2 {
  font-size: 30px;
  font-weight: 600;
  line-height: 1.4;
}

.section-intro {
  max-width: 760px;
  margin-top: 12px;
  color: var(--muted);
}

.about {
  background: var(--white);
  border-block: 1px solid var(--line);
}

.direction-list {
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.direction-list li {
  display: grid;
  grid-template-columns: 48px minmax(130px, 1fr) minmax(0, 2fr);
  align-items: baseline;
  gap: 12px 24px;
  padding-block: 24px;
  border-top: 1px solid var(--line);
}

.direction-number {
  color: var(--green);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

h3 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.5;
}

.direction-list p {
  color: var(--muted);
}

.purpose-boundary {
  max-width: 760px;
  margin-top: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.app {
  background: var(--app-background);
}

.app-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px 32px;
}

.app-content p {
  margin-top: 12px;
  color: var(--muted);
}

.release-status {
  font-weight: 600;
}

#app .app-platform-status {
  margin: 16px 0 0;
}

#app .app-platform-status > div {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 4px 16px;
}

#app .app-platform-status > div + div {
  margin-top: 4px;
}

#app .app-platform-status dt {
  font-weight: 600;
}

#app .app-platform-status dd {
  min-width: 0;
  margin: 0;
  color: var(--muted);
}

.app-support-link {
  display: inline-flex;
  align-items: center;
  min-width: 44px;
  min-height: 44px;
  max-width: 100%;
  padding: 8px 0;
  color: var(--green);
  font-weight: 600;
  white-space: normal;
  overflow-wrap: anywhere;
}

.support {
  background: var(--rose-background);
}

.support-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 16px;
}

.support-email {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  max-width: 100%;
  min-height: 44px;
  overflow-wrap: anywhere;
  word-break: break-all;
  font-size: 20px;
}

.copy-email {
  max-width: 100%;
  min-height: 44px;
  padding: 8px 16px;
  color: var(--green);
  background: var(--white);
  border: 1px solid var(--green);
  border-radius: 4px;
  font: inherit;
  font-weight: 600;
  white-space: normal;
  overflow-wrap: anywhere;
  cursor: pointer;
}

.copy-email:hover {
  background: var(--app-background);
}

.copy-email:disabled {
  cursor: wait;
}

.support-note,
.copy-status {
  max-width: 760px;
  margin-top: 8px;
  color: var(--muted);
}

.copy-status {
  min-height: 1.7em;
}

.support-preparation-heading {
  margin-top: 24px;
}

.support-preparation-list {
  max-width: 760px;
  margin: 8px 0 0;
  padding-inline-start: 24px;
  color: var(--muted);
}

.support-preparation-list > li + li {
  margin-top: 4px;
}

.support-details {
  margin: 20px 0 0;
}

.support-details > div {
  display: grid;
  grid-template-columns: minmax(0, 180px) minmax(0, 1fr);
  gap: 8px 24px;
  padding-block: 16px;
  border-top: 1px solid var(--line);
}

.support-details dt {
  font-weight: 600;
}

.support-details dd {
  min-width: 0;
  margin: 0;
  color: var(--muted);
}

.faq {
  background: var(--white);
}

.faq-list {
  margin-top: 24px;
  border-bottom: 1px solid var(--line);
}

.faq-list details {
  border-top: 1px solid var(--line);
}

.faq-list summary {
  min-height: 44px;
  padding: 18px 4px;
  font-weight: 600;
  cursor: pointer;
}

.faq-list summary::marker,
.faq-list details[open] summary {
  color: var(--green);
}

.faq-list summary:hover {
  text-decoration: underline;
  text-underline-offset: 5px;
}

.faq-list details > p {
  max-width: 760px;
  padding: 0 4px 20px;
  color: var(--muted);
}

.site-footer {
  padding-block: 24px;
  border-top: 1px solid var(--line);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 24px;
}

.footer-brand {
  font-size: 20px;
  font-weight: 700;
}

.site-footer small {
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 640px) {
  .content {
    width: calc(100% - 40px);
  }

  .header-content {
    min-height: 68px;
    column-gap: 16px;
  }

  nav {
    column-gap: 16px;
  }

  .hero {
    padding-block: 36px 40px;
  }

  h1 {
    gap: 12px;
    font-size: 64px;
  }

  .brand-korean {
    font-size: 20px;
  }

  .hero-message {
    margin-top: 20px;
    font-size: 26px;
  }

  .hero-description {
    font-size: 16px;
  }

  .section {
    padding-block: 36px;
  }

  h2 {
    font-size: 26px;
  }

  .direction-list li {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 8px 16px;
    padding-block: 20px;
  }

  .direction-list p {
    grid-column: 2;
  }

  .support-email {
    font-size: 18px;
  }

  .support-details > div {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation: none !important;
    transition: none !important;
  }
}