:root {
  color-scheme: dark;
  --background: #16191f;
  --panel: #1d2129;
  --panel-raised: #272c36;
  --hairline: rgba(255, 255, 255, 0.08);
  --text: #f3f5f8;
  --secondary: #c9d1dd;
  --tertiary: #9aa5b5;
  --accent: #e5483b;
  --accent-hover: #ef5a4d;
  --accent-small: #c93a2e;
  --accent-small-hover: #b93328;
  --on-accent: #fff;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 24px; }
body {
  margin: 0;
  background: var(--background);
  color: var(--secondary);
  font-family: "IBM Plex Sans KR", system-ui, "Segoe UI", "Malgun Gothic", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.75;
  overflow-wrap: anywhere;
}
:lang(ko) { word-break: keep-all; }
a { color: var(--text); text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
main:focus { outline: none; }
.container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
p { margin: 0 0 1.15em; }
p:last-child { margin-bottom: 0; }
h1, h2, h3 { color: var(--text); font-weight: 700; }
h1 { max-width: 980px; margin: 0 0 26px; font-size: clamp(2rem, 4.6vw, 3.5rem); line-height: 1.2; letter-spacing: -0.01em; text-wrap: balance; }
h2 { margin: 0 0 22px; font-size: clamp(1.5rem, 2.6vw, 2rem); line-height: 1.35; letter-spacing: -0.01em; text-wrap: balance; }
h3 { margin: 0 0 18px; font-size: 1.25rem; line-height: 1.4; }
kbd, code { font-family: "IBM Plex Mono", Consolas, monospace; font-size: 0.86em; color: var(--text); }
kbd { padding: 2px 5px; border: 1px solid var(--hairline); border-radius: 4px; background: var(--panel-raised); font-weight: 500; white-space: nowrap; }
code { overflow-wrap: anywhere; }
ul { padding-left: 1.25em; margin: 0; }
li + li { margin-top: 10px; }
.small { font-size: 0.9375rem; color: var(--tertiary); line-height: 1.8; }
.skip-link { position: absolute; top: 12px; left: 20px; z-index: 10; padding: 10px 18px; background: var(--panel-raised); transform: translateY(-180%); border-radius: 4px; }
.skip-link:focus { transform: translateY(0); }
.site-header { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--hairline); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-size: 1.125rem; font-weight: 600; flex-shrink: 0; line-height: 1.3; }
.brand img { display: block; }
.site-header nav { display: flex; align-items: center; gap: 28px; font-size: 0.9375rem; }
.site-header nav > a:not(.store-button) { text-decoration: none; }
.site-header nav > a:not(.store-button):hover { text-decoration: underline; }
.store-button { display: inline-flex; align-items: center; justify-content: center; padding: 14px 22px; border-radius: 8px; background: var(--accent); color: var(--on-accent); font-size: 19px; font-weight: 700; line-height: 1.5; text-align: center; text-decoration: none; max-width: 100%; }
.store-button:hover { background: var(--accent-hover); }
.store-button-small { padding: 10px 16px; background: var(--accent-small); font-size: 15px; line-height: 1.4; }
.store-button-small:hover { background: var(--accent-small-hover); }
.hero { padding-top: 72px; }
.lead { max-width: 820px; margin-bottom: 28px; font-size: 1.125rem; line-height: 1.85; }
.hero-action { display: flex; align-items: center; flex-wrap: wrap; gap: 16px 24px; margin-bottom: 44px; }
.requirements { margin: 0; font-size: 0.875rem; color: var(--tertiary); }
.screen { display: block; width: 100%; height: auto; min-width: 0; border: 1px solid var(--hairline); border-radius: 12px; background: var(--panel); }
.hero-video { aspect-ratio: 16 / 9; }
.promise { padding: 36px 0 38px; border-bottom: 1px solid var(--hairline); }
.promise-title { max-width: 920px; margin: 0 0 12px; color: var(--text); font-size: clamp(1.125rem, 1.8vw, 1.375rem); line-height: 1.65; }
.promise-title strong { font-weight: 500; }
.promise .small { max-width: 940px; }
.features { padding: 96px 0; display: grid; gap: 104px; }
.feature { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); align-items: center; gap: 48px; }
.feature-copy { max-width: 40em; }
.feature-reverse { grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); }
.feature-reverse .feature-copy { grid-column: 2; grid-row: 1; }
.feature-reverse .screen { grid-column: 1; grid-row: 1; }
.comparison { padding: 52px; background: var(--panel); border: 1px solid var(--hairline); border-radius: 12px; }
.section-intro { max-width: 780px; }
.comparison-columns { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; margin-top: 36px; }
.comparison-note { max-width: 940px; padding-top: 30px; margin-top: 32px; border-top: 1px solid var(--hairline); }
.faq { max-width: 920px; margin: 96px auto; }
.faq h2 { margin-bottom: 30px; }
details { border-bottom: 1px solid var(--hairline); }
details:first-of-type { border-top: 1px solid var(--hairline); }
summary { padding: 24px 0; color: var(--text); font-size: 1.125rem; font-weight: 500; cursor: pointer; }
summary::marker { color: var(--tertiary); }
.faq-answer { padding: 0 0 26px 22px; }
.faq-answer ul { margin-bottom: 1.15em; }
.site-footer { border-top: 1px solid var(--hairline); padding-top: 28px; padding-bottom: 36px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 12px 28px; margin-bottom: 14px; font-size: 0.9375rem; }
.site-footer nav a { text-decoration: none; }
.site-footer nav a:hover { text-decoration: underline; }
.error-page { min-height: 100vh; display: flex; flex-direction: column; }
.error-content { flex: 1; padding-block: 88px; }
.error-content h1 { font-size: clamp(2rem, 4.6vw, 3rem); }
.error-content div { margin-top: 48px; }

@media (max-width: 900px) {
  .feature, .feature-reverse { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .feature-reverse .feature-copy, .feature-reverse .screen { grid-column: auto; grid-row: auto; }
  .feature-copy { max-width: 760px; }
  .features { gap: 64px; padding: 64px 0; }
  .comparison { padding: 32px; }
  .comparison-columns { gap: 32px; }
}
@media (max-width: 600px) {
  .container { width: calc(100% - 32px); }
  .site-header { min-height: 80px; gap: 12px; }
  .site-header nav { gap: 12px; }
  .brand { font-size: 1rem; gap: 8px; }
  .store-button-small { padding: 10px 12px; }
  .hero { padding-top: 44px; }
  h1 { margin-bottom: 22px; }
  .lead { font-size: 1.0625rem; }
  .hero-action { align-items: flex-start; flex-direction: column; gap: 12px; margin-bottom: 28px; }
  .promise { padding-block: 28px; }
  .features { padding: 48px 0; gap: 56px; }
  .screen { border-radius: 10px; }
  .comparison { padding: 24px 20px; }
  .comparison-columns { grid-template-columns: minmax(0, 1fr); gap: 28px; margin-top: 28px; }
  .faq { margin-block: 56px; }
  summary { padding-block: 22px; }
  .faq-answer { padding-left: 0; }
  .site-footer nav { gap: 12px 20px; }
}
@media (max-width: 520px) {
  .faq-link { display: none; }
}
@media (max-width: 359px) {
  .site-header { gap: 8px; }
  .brand { gap: 6px; font-size: 0.9375rem; }
  .site-header nav { gap: 8px; font-size: 0.875rem; }
  .store-button-small { max-width: 88px; padding: 8px; }
}