:root {
  --ink: #171717;
  --muted: #686762;
  --paper: #f7f7f3;
  --card: rgba(255, 255, 255, 0.88);
  --line: #e6e5df;
  --accent: #f26a3d;
  --accent-deep: #c94720;
  --accent-soft: #fff0e9;
  --green: #28644d;
  --shadow: 0 18px 48px rgba(31, 28, 22, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Avenir Next', Avenir, 'Segoe UI', Helvetica, Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(242, 106, 61, 0.12), transparent 27rem),
    radial-gradient(circle at 92% 9%, rgba(40, 100, 77, 0.10), transparent 25rem),
    var(--paper);
}

main {
  width: min(100% - 2rem, 960px);
  margin: 0 auto;
  padding: 3.5rem clamp(1rem, 4vw, 3.5rem) 5rem;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 4rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--line);
}
.site-header .lang { margin: 0; }
.header-app-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  color: var(--ink);
  font-size: 0.86rem;
  text-decoration: none;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}
.header-app-link:hover { background: var(--ink); color: #fff; transform: translateY(-1px); }
.header-app-link span { color: var(--accent); font-size: 1rem; }

.brand {
  display: inline-flex;
  padding: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 1.35rem;
  background: rgba(255, 255, 255, 0.74);
  box-shadow: 0 8px 24px rgba(31, 28, 22, 0.07);
  transition: transform 180ms ease, box-shadow 180ms ease;
}
.brand:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(31, 28, 22, 0.12); }
.brand img {
  display: block;
  width: 154px;
  height: auto;
  border-radius: 0.95rem;
}
.site-header + .brand {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}
.site-header + .brand img {
  width: 250px;
  border-radius: 1.4rem;
  box-shadow: 0 20px 42px rgba(31, 28, 22, 0.12);
}
.site-header + .brand:hover { box-shadow: none; }
.brand-small img { width: 94px; border-radius: 0.75rem; }

.lang {
  margin: 1.4rem 0 0.8rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.lang a, .lang strong { color: var(--ink); text-decoration: none; }
.lang strong { color: var(--accent-deep); }

h1, h2, h3 {
  font-family: 'Avenir Next', Avenir, 'Segoe UI', Helvetica, Arial, sans-serif;
  letter-spacing: -0.035em;
}
h1 {
  max-width: 760px;
  margin: 0.4rem 0 0.45rem;
  font-size: clamp(2.5rem, 7vw, 5.4rem);
  line-height: 0.98;
}
h2 {
  margin: 3.25rem 0 1rem;
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  line-height: 1.1;
}
h3 { font-size: 1.2rem; margin: 0.3rem 0 0.45rem; }

p, li, td, th { line-height: 1.72; }
p { color: #393936; }
a { color: var(--accent-deep); font-weight: 600; text-underline-offset: 0.18em; }
a:hover { color: var(--green); }
.updated { margin: 0; color: var(--muted); font-size: 0.88rem; }

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 2rem 0 2.25rem;
  padding: 0.6rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.72);
}
nav a {
  padding: 0.48rem 0.78rem;
  border-radius: 0.65rem;
  color: var(--ink);
  font-size: 0.88rem;
  text-decoration: none;
}
nav a:hover { background: var(--accent-soft); color: var(--accent-deep); }

.back { margin: 1.2rem 0 0; font-size: 0.9rem; }
.back a { color: var(--muted); text-decoration: none; }

.apps { display: grid; gap: 1rem; padding: 0; list-style: none; }
.apps li, .box {
  padding: 1.35rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: var(--card);
  box-shadow: 0 8px 24px rgba(31, 28, 22, 0.035);
}
.apps li:first-child { border-color: rgba(242, 106, 61, 0.35); box-shadow: var(--shadow); }
.apps li:first-child h3 a { color: var(--ink); font-size: 1.45rem; text-decoration: none; }
.apps li:first-child h3 a::after { content: ' ↗'; color: var(--accent); }
.apps h3 { margin-top: 0; }
.apps .soon { margin: 0; color: var(--muted); font-style: italic; }

.box { margin: 1.5rem 0; }
.box h2 { margin-top: 0.2rem; }
.box li + li { margin-top: 0.45rem; }

.notice {
  margin: 1.5rem 0;
  padding: 1.1rem 1.35rem;
  border: 1px solid #f4c0a9;
  border-left: 5px solid var(--accent);
  border-radius: 1rem;
  background: var(--accent-soft);
}
.notice p { margin: 0; }

.facts {
  display: grid;
  grid-template-columns: minmax(10rem, 0.7fr) 1.3fr;
  margin: 1rem 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--card);
}
.facts dt, .facts dd { margin: 0; padding: 0.85rem 1rem; border-bottom: 1px solid var(--line); }
.facts dt { color: var(--muted); font-size: 0.88rem; font-weight: 700; }
.facts dd { border-left: 1px solid var(--line); }
.facts dt:last-of-type, .facts dd:last-of-type { border-bottom: 0; }

.table-wrap { overflow-x: auto; margin: 1rem 0; border: 1px solid var(--line); border-radius: 1rem; box-shadow: 0 8px 24px rgba(31, 28, 22, 0.035); }
table { width: 100%; border-collapse: collapse; background: var(--card); font-size: 0.93rem; }
th, td { padding: 0.75rem 0.9rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: #f0f5f1; color: var(--green); font-weight: 700; }
tr:last-child td { border-bottom: 0; }

mark.todo { padding: 0.12rem 0.35rem; border-radius: 0.35rem; background: #ffe19c; color: #5c3e00; }

@media (max-width: 620px) {
  main { width: min(100% - 1rem, 960px); padding: 1.25rem 0.75rem 3rem; }
  .site-header { margin-bottom: 2.5rem; }
  .header-app-link { padding: 0.58rem 0.75rem; font-size: 0.78rem; }
  .brand img { width: 126px; }
  .site-header + .brand img { width: 190px; }
  .brand-small img { width: 82px; }
  h1 { font-size: clamp(2.35rem, 14vw, 4rem); }
  h2 { margin-top: 2.5rem; }
  nav { gap: 0.2rem; padding: 0.45rem; }
  nav a { padding: 0.42rem 0.55rem; font-size: 0.8rem; }
  .apps li, .box { padding: 1.15rem; }
  .facts { grid-template-columns: 1fr; }
  .facts dt { padding-bottom: 0.25rem; border-bottom: 0; }
  .facts dd { padding-top: 0.15rem; border-left: 0; }
  .facts dd:last-of-type { border-bottom: 0; }
}