:root {
  --ink: #16243a;
  --ink-soft: #5d6877;
  --paper: #fff8e8;
  --white: #ffffff;
  --yellow: #ffd34e;
  --orange: #d9601f;
  --line: rgba(22, 36, 58, 0.13);
  --shell: 1040px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", "Noto Sans KR", "Noto Sans JP", "Noto Sans SC", "Noto Sans TC", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  min-height: 100svh;
  margin: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 18%, rgba(255, 211, 78, 0.3), transparent 26rem),
    radial-gradient(circle at 88% 76%, rgba(244, 124, 53, 0.12), transparent 24rem),
    var(--paper);
  font-family: var(--font);
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
}

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

button {
  color: inherit;
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 9px 13px;
  border-radius: 9px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-160%);
}

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

.shell {
  width: min(calc(100% - 40px), var(--shell));
  margin-inline: auto;
}

.landing-header {
  padding-block: 18px;
}

.landing-header__inner,
.landing-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand__icon {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 7px 18px rgba(22, 36, 58, 0.1);
}

.language-selector {
  position: relative;
}

.language-selector__button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.74);
  cursor: pointer;
}

.language-selector__current {
  min-width: 56px;
  font-size: 0.86rem;
  font-weight: 700;
  text-align: left;
}

.language-selector__dropdown {
  position: absolute;
  z-index: 10;
  top: calc(100% + 8px);
  right: 0;
  width: 176px;
  display: none;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  box-shadow: 0 16px 40px rgba(22, 36, 58, 0.14);
}

.language-selector.open .language-selector__dropdown {
  display: grid;
}

.language-selector__option {
  min-height: 38px;
  padding: 7px 10px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  cursor: pointer;
  font-size: 0.88rem;
  text-align: left;
}

.language-selector__option:hover,
.language-selector__option:focus-visible,
.language-selector__option.active {
  background: var(--paper);
}

.language-selector__option.active {
  font-weight: 800;
}

.landing-main {
  min-height: 0;
  display: grid;
  place-items: center;
  padding: 34px 20px 44px;
}

.landing-card {
  width: min(100%, 780px);
  text-align: center;
}

.app-icon {
  width: clamp(92px, 12vw, 120px);
  height: clamp(92px, 12vw, 120px);
  margin: 0 auto 22px;
  border: 1px solid rgba(22, 36, 58, 0.08);
  border-radius: 28%;
  object-fit: cover;
  box-shadow: 0 20px 44px rgba(22, 36, 58, 0.16);
}

.eyebrow {
  margin: 0 0 12px;
  color: #9a4516;
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.8rem, 7vw, 5.4rem);
  font-weight: 850;
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.landing-description {
  max-width: 660px;
  margin: 22px auto 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 2vw, 1.16rem);
}

.benefit-list {
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  list-style: none;
}

.benefit-list li {
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.58);
  font-size: 0.84rem;
  font-weight: 700;
}

.benefit-list li::before {
  content: "✓";
  margin-right: 6px;
  color: var(--orange);
  font-weight: 900;
}

.store-links {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.store-link {
  border-radius: 9px;
  transition: transform 150ms ease, opacity 150ms ease;
}

.store-link:hover {
  opacity: 0.88;
  transform: translateY(-2px);
}

.store-link img {
  width: auto;
  height: 50px;
}

.platform-note {
  margin: 12px 0 0;
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.landing-footer {
  border-top: 1px solid var(--line);
  padding-block: 18px;
}

.landing-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.landing-footer a,
.landing-footer p {
  color: var(--ink-soft);
  font-size: 0.8rem;
}

.landing-footer a:hover {
  color: var(--orange);
}

.landing-footer p {
  margin: 0;
}

@media (max-width: 640px) {
  .shell {
    width: min(calc(100% - 28px), var(--shell));
  }

  .landing-header {
    padding-block: 14px;
  }

  .brand__icon {
    width: 38px;
    height: 38px;
  }

  .language-selector__current {
    min-width: auto;
  }

  .landing-main {
    padding: 24px 16px 32px;
  }

  .app-icon {
    margin-bottom: 18px;
  }

  h1 {
    font-size: clamp(2.6rem, 13vw, 3.8rem);
  }

  .landing-description {
    margin-top: 17px;
  }

  .benefit-list {
    margin-top: 20px;
  }

  .store-links {
    margin-top: 23px;
  }

  .store-link img {
    height: 46px;
  }

  .landing-footer__inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
}

@media (max-height: 720px) and (min-width: 641px) {
  .landing-main {
    padding-block: 18px 28px;
  }

  .app-icon {
    width: 88px;
    height: 88px;
    margin-bottom: 16px;
  }

  .landing-description {
    margin-top: 16px;
  }

  .benefit-list {
    margin-top: 18px;
  }

  .store-links {
    margin-top: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .store-link {
    transition: none;
  }
}