:root {
  color-scheme: light;
  --paper: #ffffff;
  --ground: #f4f3f5;
  --ink: #19181b;
  --ink-soft: #545158;
  --line: rgba(44, 41, 47, 0.14);
  --crimson: #c84049;
  --crimson-dark: #a82e39;
  --crimson-soft: #f8eaec;
  --shadow: 0 32px 80px rgba(55, 38, 42, 0.16), 0 8px 24px rgba(55, 38, 42, 0.08);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: clip; background: var(--paper); color: var(--ink); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
::selection { background: rgba(200, 64, 73, 0.2); }

.skip-link { position: fixed; top: 10px; left: 10px; z-index: 20; padding: 10px 14px; border-radius: 9px; background: var(--ink); color: white; transform: translateY(-150%); }
.skip-link:focus { transform: none; }

.site-header { position: relative; z-index: 10; display: flex; width: min(1180px, calc(100% - 48px)); height: 82px; margin: 0 auto; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-size: 19px; font-weight: 760; letter-spacing: -0.025em; text-decoration: none; }
.brand img { display: block; border-radius: 9px; filter: drop-shadow(0 4px 8px rgba(105, 24, 34, 0.18)); }
.site-header nav { display: flex; align-items: center; gap: 28px; }
.site-header nav a { color: var(--ink-soft); font-size: 14px; font-weight: 590; text-decoration: none; }
.site-header nav a:hover { color: var(--crimson-dark); }
.language-toggle { height: 34px; padding: 0 12px; border: 1px solid var(--line); border-radius: 9px; background: var(--paper); color: var(--ink-soft); font: inherit; font-size: 13px; cursor: pointer; }
.language-toggle:hover { border-color: rgba(200, 64, 73, 0.35); color: var(--crimson-dark); background: var(--crimson-soft); }

.hero { position: relative; width: min(1180px, calc(100% - 48px)); min-height: calc(100vh - 82px); margin: 0 auto; padding: 78px 0 110px; }
.hero::before { position: absolute; top: 34px; left: -32px; width: 1px; height: 360px; background: linear-gradient(var(--crimson), rgba(200, 64, 73, 0)); content: ""; }
.hero-copy { position: relative; z-index: 2; width: min(680px, 67%); }
.availability { display: inline-flex; margin: 0 0 26px; align-items: center; gap: 9px; color: var(--crimson-dark); font-size: 13px; letter-spacing: 0.01em; }
.availability span { width: 7px; height: 7px; border-radius: 50%; background: var(--crimson); box-shadow: 0 0 0 5px var(--crimson-soft); }
.availability b { font-weight: 680; }
h1 { max-width: 730px; margin: 0; font-size: clamp(3.4rem, 6.1vw, 5.7rem); line-height: 0.98; letter-spacing: -0.038em; text-wrap: balance; }
.hero-lede { max-width: 650px; margin: 30px 0 0; color: var(--ink-soft); font-size: 19px; line-height: 1.65; text-wrap: pretty; }
.hero-actions { display: flex; margin-top: 34px; align-items: center; gap: 11px; }
.hero-actions a { display: inline-flex; min-height: 46px; padding: 0 18px; align-items: center; justify-content: center; border-radius: 11px; font-size: 15px; font-weight: 680; text-decoration: none; transition: transform 160ms ease, background 160ms ease, border-color 160ms ease; }
.hero-actions a:active { transform: scale(0.98); }
.primary-action { background: var(--crimson); color: white; }
.primary-action:hover { background: var(--crimson-dark); }
.secondary-action { border: 1px solid var(--line); background: var(--paper); color: var(--ink); }
.secondary-action:hover { border-color: rgba(200, 64, 73, 0.35); background: var(--crimson-soft); }
.platform-note { margin: 13px 0 0; color: #77737b; font-size: 13px; }

.product-window { position: relative; z-index: 3; width: min(1060px, 92%); margin: 92px 0 0 auto; }
.window-caption { display: flex; margin: 0 0 12px; align-items: center; justify-content: space-between; color: #77737b; font-size: 13px; }
.window-caption code { padding: 3px 7px; border-radius: 6px; background: var(--crimson-soft); color: var(--crimson-dark); font: 600 12px "SFMono-Regular", Consolas, monospace; }
.product-window img { display: block; width: 100%; height: auto; border: 1px solid rgba(44, 41, 47, 0.16); border-radius: 22px; background: var(--ground); box-shadow: var(--shadow); }

.features { width: min(1180px, calc(100% - 48px)); margin: 0 auto; padding: 120px 0 130px; }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr); gap: 64px; align-items: end; margin-bottom: 58px; }
.section-heading h2, .principles h2, .download h2 { margin: 0; font-size: clamp(2.5rem, 4.6vw, 4.6rem); line-height: 1.02; letter-spacing: -0.034em; text-wrap: balance; }
.section-heading p { max-width: 520px; margin: 0 0 5px; color: var(--ink-soft); font-size: 17px; line-height: 1.65; }
.feature-list { border-top: 1px solid var(--line); }
.feature-list article { display: grid; grid-template-columns: 62px minmax(0, 1.25fr) minmax(250px, 0.75fr); gap: 32px; padding: 40px 0 42px; align-items: start; border-bottom: 1px solid var(--line); }
.feature-mark { display: grid; width: 52px; height: 52px; place-items: center; border-radius: 14px; background: var(--crimson-soft); color: var(--crimson-dark); font-size: 17px; font-weight: 760; letter-spacing: -0.04em; }
.library-mark { font-size: 20px; }
.trust-mark { color: white; background: var(--crimson); }
.feature-list h3 { max-width: 520px; margin: 3px 0 10px; font-size: 25px; line-height: 1.15; letter-spacing: -0.024em; }
.feature-list p { max-width: 650px; margin: 0; color: var(--ink-soft); font-size: 16px; line-height: 1.65; }
.feature-list ul { margin: 3px 0 0; padding: 0; list-style: none; }
.feature-list li { position: relative; margin: 0 0 12px; padding-left: 17px; color: var(--ink-soft); font-size: 14px; line-height: 1.4; }
.feature-list li::before { position: absolute; top: 0.58em; left: 0; width: 5px; height: 5px; border-radius: 50%; background: var(--crimson); content: ""; }

.principles { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(340px, 0.8fr); gap: 90px; width: min(1240px, calc(100% - 32px)); margin: 0 auto; padding: 88px 88px 92px; border-radius: 28px; background: #211b1e; color: #fff; }
.principles-copy p { max-width: 680px; margin: 28px 0 0; color: #c9c0c4; font-size: 17px; line-height: 1.7; }
.principles dl { margin: 0; }
.principles dl div { display: flex; min-height: 64px; align-items: center; justify-content: space-between; gap: 28px; border-bottom: 1px solid rgba(255, 255, 255, 0.13); }
.principles dt { color: #a89da2; font-size: 13px; }
.principles dd { margin: 0; color: #fff; font-size: 16px; font-weight: 650; text-align: right; }

.download { display: flex; width: min(1180px, calc(100% - 48px)); margin: 0 auto; padding: 140px 0 132px; align-items: end; justify-content: space-between; gap: 72px; }
.download > div:first-child { max-width: 760px; }
.download p { max-width: 680px; margin: 25px 0 0; color: var(--ink-soft); font-size: 17px; line-height: 1.7; }
.download-actions { display: flex; min-width: 220px; align-items: stretch; flex-direction: column; gap: 10px; }
.download-actions a { display: inline-flex; min-height: 46px; padding: 0 18px; align-items: center; justify-content: center; border-radius: 11px; border: 1px solid var(--line); font-size: 14px; font-weight: 670; text-decoration: none; }
.download-actions a:not(.primary-action):hover { border-color: rgba(200, 64, 73, 0.35); background: var(--crimson-soft); color: var(--crimson-dark); }

.site-footer { display: grid; grid-template-columns: 1fr auto 1fr; width: min(1180px, calc(100% - 48px)); min-height: 96px; margin: 0 auto; align-items: center; border-top: 1px solid var(--line); color: #77737b; font-size: 13px; }
.site-footer > div { display: flex; align-items: center; gap: 8px; color: var(--ink); font-weight: 720; }
.site-footer img { border-radius: 7px; }
.site-footer p { margin: 0; text-align: center; }
.site-footer nav { display: flex; justify-content: flex-end; gap: 18px; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--crimson-dark); }

:focus-visible { outline: 3px solid rgba(200, 64, 73, 0.4); outline-offset: 3px; }

@media (max-width: 760px) {
  .site-header { width: min(calc(100% - 30px), 1180px); height: 70px; }
  .site-header nav { gap: 10px; }
  .site-header nav > a:not(:last-of-type) { display: none; }
  .site-header nav a { font-size: 13px; }
  .hero { width: min(calc(100% - 30px), 1180px); min-height: auto; padding: 54px 0 80px; }
  .hero::before { display: none; }
  .hero-copy { width: 100%; }
  h1 { font-size: clamp(2.85rem, 12.5vw, 4.25rem); letter-spacing: -0.034em; }
  .hero-lede { margin-top: 24px; font-size: 17px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-actions a { width: 100%; }
  .platform-note { text-align: center; }
  .product-window { width: 100%; margin-top: 58px; margin-left: 0; }
  .product-window img { border-radius: 14px; }
  .features { width: min(calc(100% - 30px), 1180px); padding: 88px 0 90px; }
  .section-heading { display: block; margin-bottom: 42px; }
  .section-heading p { margin-top: 20px; }
  .feature-list article { grid-template-columns: 52px minmax(0, 1fr); gap: 18px; padding: 32px 0 34px; }
  .feature-list article > ul { grid-column: 2; }
  .feature-mark { width: 46px; height: 46px; border-radius: 12px; }
  .feature-list h3 { font-size: 22px; }
  .principles { display: block; width: 100%; padding: 72px 24px 76px; border-radius: 0; }
  .principles dl { margin-top: 48px; }
  .download { width: min(calc(100% - 30px), 1180px); padding: 94px 0 88px; align-items: stretch; flex-direction: column; gap: 38px; }
  .download-actions { width: 100%; }
  .site-footer { display: flex; width: min(calc(100% - 30px), 1180px); padding: 28px 0 34px; align-items: flex-start; flex-direction: column; gap: 18px; }
  .site-footer p { text-align: left; }
  .site-footer nav { flex-wrap: wrap; justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}