/* Carebyte website — one stylesheet, no external requests. */
:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #14302f;
  --muted: #566866;
  --line: #e2e7e5;
  --brand: #0f766e;
  --brand-ink: #0b5f58;
  --brand-soft: #e4f2ef;
  --on-brand: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1615;
    --surface: #152120;
    --ink: #e5eeec;
    --muted: #9db0ad;
    --line: #243331;
    --brand: #3aa597;
    --brand-ink: #7fd2c7;
    --brand-soft: #16302d;
    --on-brand: #06201d;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
        "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand-ink); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; border-radius: 8px; z-index: 20; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--brand); outline-offset: 2px; border-radius: 4px; }

/* header */
header.site {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--ink); text-decoration: none; letter-spacing: -.01em; }
.brand svg { width: 30px; height: 30px; flex: none; }
.nav-links { display: flex; gap: 22px; align-items: center; font-size: 15px; }
.nav-links a { color: var(--muted); text-decoration: none; }
.nav-links a:hover { color: var(--ink); }
.nav-links .lang { border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; color: var(--ink); }

/* hero */
.hero { padding: 104px 0 80px; border-top: 0; }
.eyebrow { color: var(--brand-ink); font-weight: 600; font-size: 14px; letter-spacing: .08em; text-transform: uppercase; }
h1 { font-size: clamp(34px, 5.4vw, 58px); line-height: 1.1; letter-spacing: -.025em; margin: 14px 0 20px; max-width: 18ch; text-wrap: balance; }
:lang(zh) h1 { letter-spacing: 0; max-width: none; text-wrap: wrap; }
.lead { font-size: clamp(18px, 2vw, 21px); color: var(--muted); max-width: 60ch; margin: 0 0 32px; }
.btn { display: inline-block; background: var(--brand); color: var(--on-brand); text-decoration: none; padding: 13px 22px; border-radius: 10px; font-weight: 600; }
.btn:hover { filter: brightness(1.06); }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); margin-left: 10px; }

/* sections */
section { padding: 80px 0; border-top: 1px solid var(--line); }
h2 { font-size: clamp(26px, 3vw, 34px); line-height: 1.2; letter-spacing: -.02em; margin: 0 0 12px; }
.section-lead { color: var(--muted); max-width: 62ch; margin: 0 0 36px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 18px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 24px; }
.card h3 { margin: 16px 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15.5px; }
.icon { width: 42px; height: 42px; border-radius: 11px; background: var(--brand-soft); color: var(--brand-ink); display: grid; place-items: center; }
.icon svg { width: 22px; height: 22px; }
.commit { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 48px; max-width: 900px; }
.commit > div { border-left: 3px solid var(--brand); padding-left: 16px; }
.commit h3 { font-size: 17px; margin: 0 0 6px; }
.commit p { margin: 0; color: var(--muted); font-size: 15.5px; }
.contact { background: var(--brand-soft); border-radius: 20px; padding: 40px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; align-items: center; }
.contact h2 { margin-bottom: 8px; }
.contact p { margin: 0; color: var(--muted); max-width: 52ch; }

/* footer */
footer { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--muted); font-size: 14px; }
.foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 18px; }
.foot a { color: var(--muted); }

/* privacy & support pages */
.doc { max-width: 760px; padding: 64px 0 80px; }
.doc h1 { font-size: clamp(30px, 4vw, 42px); max-width: none; }
.doc h2 { font-size: 21px; margin: 40px 0 10px; }
.doc h3 { font-size: 17px; margin: 24px 0 4px; }
.doc li { margin: 6px 0; }
.meta { color: var(--muted); font-size: 14px; margin-top: -6px; }
.note { color: var(--muted); font-size: 15px; }
.callout { background: var(--brand-soft); border-radius: 14px; padding: 18px 22px; margin: 24px 0; }
.callout p { margin: 4px 0; }

@media (max-width: 680px) {
  .nav-links a:not(.lang) { display: none; }
  .nav-links a[href$="/support/"] { display: inline; }
  .hero { padding: 64px 0 52px; }
  section { padding: 56px 0; }
  .contact { padding: 28px 22px; }
  .btn.ghost { margin: 10px 0 0 8px; }
  .commit { grid-template-columns: 1fr; }
}