:root {
  color-scheme: light dark;
  --page: #f5f7f4;
  --surface: #ffffff;
  --ink: #17251e;
  --muted: #59675f;
  --line: #dce4dd;
  --brand: #176b4d;
  --brand-soft: #e6f2e9;
  --focus: #0b7650;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
}
a { color: var(--brand); text-underline-offset: .18em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
.shell { width: min(880px, 100% - 40px); margin: 0 auto; }
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 0 18px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; }
.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 13px;
  background: var(--brand);
  color: #fff;
  font-weight: 750;
  letter-spacing: -.05em;
}
.brand-name { display: block; font-size: 1.1rem; font-weight: 730; line-height: 1.2; }
.brand-caption { display: block; margin-top: 4px; color: var(--muted); font-size: .68rem; font-weight: 650; letter-spacing: .12em; }
.language-switch { display: inline-flex; gap: 3px; padding: 4px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); }
.language-switch button {
  min-height: 34px;
  padding: 5px 11px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: .8rem;
}
.language-switch button[aria-pressed="true"] { background: var(--brand-soft); color: var(--brand); font-weight: 700; }
.hero { padding: 43px 0 37px; }
.eyebrow { margin: 0 0 12px; color: var(--brand); font-size: .76rem; font-weight: 750; letter-spacing: .14em; text-transform: uppercase; }
h1 { max-width: 760px; margin: 0; font-size: clamp(2.2rem, 7vw, 3.45rem); letter-spacing: -.055em; line-height: 1.12; }
.hero-subtitle { margin: 14px 0 0; color: var(--muted); font-size: clamp(1rem, 2.5vw, 1.16rem); }
.updated { margin: 20px 0 0; color: var(--muted); font-size: .85rem; }
main { padding-bottom: 54px; }
.intro { max-width: 740px; margin: 0 0 34px; color: var(--muted); font-size: 1.08rem; }
.section { margin: 34px 0; }
.section h2 { margin: 0 0 12px; font-size: 1.35rem; letter-spacing: -.025em; line-height: 1.3; }
.section > p { margin: 0 0 14px; }
.card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px; margin-top: 17px; }
.card {
  min-width: 0;
  padding: 19px 20px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--surface);
}
.card-index { margin: 0 0 9px; color: var(--brand); font-size: .75rem; font-weight: 750; letter-spacing: .12em; }
.card h3 { margin: 0 0 8px; font-size: 1.08rem; line-height: 1.35; }
.card p { margin: 0; color: var(--muted); }
.card p + p { margin-top: 10px; }
.notice {
  margin: 22px 0;
  padding: 17px 20px;
  border-left: 4px solid var(--brand);
  border-radius: 0 13px 13px 0;
  background: var(--brand-soft);
}
.notice p { margin: 0; }
.notice p + p { margin-top: 9px; }
.link-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 15px 0;
  padding: 17px 20px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--surface);
}
.link-panel strong { display: block; }
.link-panel p { margin: 3px 0 0; color: var(--muted); }
.link-button {
  flex: 0 0 auto;
  display: inline-block;
  padding: 9px 14px;
  border: 1px solid var(--brand);
  border-radius: 999px;
  color: var(--brand);
  font-weight: 700;
  text-decoration: none;
}
.link-button:hover { background: var(--brand-soft); }
ul { padding-left: 1.3rem; }
li + li { margin-top: 7px; }
.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 22px 0 38px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .88rem;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.site-footer a { color: inherit; }
[hidden] { display: none !important; }

@media (max-width: 640px) {
  .shell { width: min(100% - 30px, 880px); }
  .site-header { align-items: flex-start; padding-top: 19px; }
  .brand { gap: 9px; }
  .brand-mark { width: 38px; height: 38px; }
  .brand-caption { font-size: .59rem; }
  .language-switch button { padding-inline: 9px; }
  .hero { padding: 34px 0 27px; }
  .card-grid { grid-template-columns: 1fr; }
  .link-panel { align-items: flex-start; flex-direction: column; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #111713;
    --surface: #19221c;
    --ink: #edf3ed;
    --muted: #b0beb4;
    --line: #334139;
    --brand: #91d5ae;
    --brand-soft: #20382b;
    --focus: #b7edcb;
  }
  .brand-mark { background: #235a40; color: #f4fff7; }
}