/* CodeHark public pages (landing, privacy, terms). No external fonts, no images except inline SVG. */
:root {
  --bg: #ffffff; --alt: #f5f7fa; --fg: #1d2127; --muted: #566070; --border: #e2e6ec; --accent: #2f6fed; --accent-h: #2561d8; --accent-t: #2159c7;
  --card: #ffffff; --code: #f3f4f6; --shadow: 0 12px 40px rgba(20,30,60,.10);
  --out-bg: #16191e; --out-fg: #d7dce2; --add: #e3f6e8; --del: #fbe7e7; --green: #187a42; --red: #c43030;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #16181c; --alt: #1b1e23; --fg: #e3e6ea; --muted: #a3abb8; --border: #2d323b; --accent: #4a82f2; --accent-h: #5a8ff5; --accent-t: #7aa5f7;
    --card: #1f2228; --code: #262a32; --shadow: 0 12px 40px rgba(0,0,0,.4); --out-bg: #0e1013; --add: #17301f; --del: #381c1c; --green: #3cc07a; --red: #ff8080; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body.site { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; -webkit-text-size-adjust: 100%; }
.site a { color: var(--accent-t); }
:where(.site) :is(h1,h2,h3) { line-height: 1.25; margin: 0; }
:where(.site) p { margin: 0; }
.wrap { width: min(1120px, 100% - 40px); margin: 0 auto; }
.wrap.narrow { width: min(760px, 100% - 40px); }
.hidden { display: none !important; }
[data-site-if]:not(.on) { display: none; }
[hidden] { display: none !important; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: #fff !important; padding: 8px 14px; border-radius: 8px; z-index: 30; }
.skip:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.nav { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.nav-in { display: flex; align-items: center; gap: 24px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--fg) !important; text-decoration: none; }
.brand svg { border-radius: 8px; box-shadow: 0 3px 10px rgba(47,111,237,.35); }
.nav-links { display: flex; gap: 20px; flex: 1; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 15px; padding: 6px 2px; }
.nav-links a:hover { color: var(--fg); }
.nav-act { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.lang-sw { display: inline-flex; align-items: center; gap: 2px; font-size: 14px; color: var(--muted); }
.lang-sw .sep { opacity: .6; }
.lang-opt { background: none; border: 0; padding: 6px 8px; border-radius: 6px; font: inherit; font-size: 14px; color: inherit; cursor: pointer; }
.lang-opt:hover { background: var(--alt); color: var(--fg); }
.lang-opt[aria-pressed=true] { color: var(--fg); font-weight: 600; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 9px 18px; border-radius: 10px; border: 1px solid var(--border); background: var(--card); color: var(--fg) !important; text-decoration: none; font: inherit; font-size: 15px; font-weight: 600; cursor: pointer; line-height: 1.3; }
.btn:hover { background: var(--alt); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.ghost:hover { background: var(--alt); }
.btn.primary { background: #2f6fed; border-color: #2f6fed; color: #fff !important; box-shadow: 0 4px 14px rgba(47,111,237,.32); }
.btn.primary:hover { background: #2561d8; border-color: #2561d8; }
.btn.lg { padding: 13px 26px; font-size: 16px; border-radius: 12px; }
.btn.light { background: #fff; border-color: #fff; color: #1d4bb0 !important; }
.btn.light:hover { background: #eef3ff; }

.hero { position: relative; overflow: hidden; padding: 72px 0 64px;
  background: radial-gradient(70% 60% at 50% -10%, rgba(47,111,237,.16), transparent 72%), linear-gradient(rgba(29,33,39,.045) 1px, transparent 1px) 0 0 / 36px 36px, linear-gradient(90deg, rgba(29,33,39,.045) 1px, transparent 1px) 0 0 / 36px 36px, var(--bg); }
@media (prefers-color-scheme: dark) { .hero { background: radial-gradient(70% 60% at 50% -10%, rgba(74,130,242,.2), transparent 72%), linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px) 0 0 / 36px 36px, linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px) 0 0 / 36px 36px, var(--bg); } }
.hero-in { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.hero h1 { display: flex; flex-direction: column; gap: 14px; }
.hero-name { font-size: 20px; font-weight: 700; color: var(--accent-t); letter-spacing: .3px; }
.hero-tag { font-size: clamp(34px, 5vw, 54px); font-weight: 800; letter-spacing: -.8px; line-height: 1.1; }
.hero-sub { margin-top: 20px; font-size: 18px; color: var(--muted); max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-note { margin-top: 14px; font-size: 14px; color: var(--muted); }

.mock { background: var(--card); border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow); overflow: hidden; font-size: 14px; }
.mock-bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; border-bottom: 1px solid var(--border); background: var(--alt); }
.mock-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--border); display: block; }
.mock-title { margin-left: 10px; font-weight: 600; font-size: 13px; }
.mock-node { margin-left: auto; display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); }
.mock-node b { width: 8px; height: 8px; border-radius: 50%; background: #1f9d55; display: block; }
.mock-body { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.m-user { align-self: flex-end; max-width: 86%; background: #2f6fed; color: #fff; padding: 9px 13px; border-radius: 14px 14px 4px 14px; }
.m-agent { max-width: 92%; }
.m-agent code, .m-cmd code { background: var(--code); padding: 1px 5px; border-radius: 4px; font-size: 12.5px; }
.m-cmd, .m-diff { border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.m-cmd-h, .m-diff-h { padding: 6px 10px; font-size: 12.5px; background: var(--alt); display: flex; align-items: center; gap: 8px; border-bottom: 1px solid var(--border); }
.m-cmd-h .dot { width: 8px; height: 8px; border-radius: 50%; background: #1f9d55; }
.m-cmd-h code { background: none; padding: 0; }
.mock pre { margin: 0; padding: 9px 12px; font: 12.5px/1.55 ui-monospace, "SF Mono", Menlo, Consolas, monospace; overflow-x: auto; }
.m-cmd pre { background: var(--out-bg); color: var(--out-fg); }
.m-diff .add { background: var(--add); display: block; }
.m-diff .del { background: var(--del); display: block; }
.mock-input { margin: 0 16px 16px; border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px; display: flex; align-items: center; justify-content: space-between; color: var(--muted); }
.mock-input b { width: 28px; height: 28px; border-radius: 50%; background: #2f6fed; color: #fff; display: inline-flex; align-items: center; justify-content: center; }

.sec { padding: 72px 0; }
.sec.alt { background: var(--alt); }
.sec h2 { font-size: clamp(26px, 3.4vw, 36px); letter-spacing: -.4px; text-align: center; }
.sec-sub { text-align: center; color: var(--muted); margin: 14px auto 0; max-width: 40em; }
.steps { list-style: none; margin: 40px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.steps li { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; }
.num { display: inline-flex; width: 34px; height: 34px; border-radius: 50%; background: #2f6fed; color: #fff; font-weight: 700; align-items: center; justify-content: center; margin-bottom: 14px; }
.steps h3, .feats h3, .dl-card h3 { font-size: 18px; margin-bottom: 8px; }
.steps p, .feats p, .dl-card p { color: var(--muted); font-size: 15px; }
.feats { list-style: none; margin: 40px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feats li { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; }
.feats svg { color: var(--accent-t); margin-bottom: 12px; display: block; }
.dl-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 360px)); gap: 20px; justify-content: center; margin-top: 36px; }
.dl-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
.dl-card.rec { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(47,111,237,.18); }
.dl-card .btn { margin-top: 6px; }
.dl-note { text-align: center; color: var(--muted); font-size: 14px; margin-top: 20px; }
details { background: var(--card); border: 1px solid var(--border); border-radius: 12px; margin-top: 12px; }
summary { cursor: pointer; padding: 15px 18px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-size: 20px; line-height: 1; color: var(--muted); }
details[open] summary::after { content: "−"; }
.ans { padding: 0 18px 16px; color: var(--muted); }
.cta-band { background: linear-gradient(155deg, #2a62d8 0%, #1d4bb0 55%, #163a8a 100%); color: #fff; text-align: center; }
.cta-band .wrap { display: flex; flex-direction: column; align-items: center; gap: 24px; }
.cta-band h2 { color: #fff; }
.foot { border-top: 1px solid var(--border); padding: 28px 0; color: var(--muted); font-size: 14px; }
.foot-in { display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: center; }
.foot a { color: var(--muted); }
.foot a:hover { color: var(--fg); }

/* legal pages */
.legal-wrap { width: min(780px, 100% - 40px); margin: 0 auto; padding: 48px 0 72px; }
.legal-wrap h1 { font-size: 34px; letter-spacing: -.4px; }
.legal-wrap .upd { color: var(--muted); font-size: 14px; margin: 8px 0 32px; }
.legal-wrap section { margin-top: 30px; }
.legal-wrap h2 { font-size: 20px; margin-bottom: 10px; }
.legal-wrap p, .legal-wrap li { color: var(--fg); }
.legal-wrap p + p, .legal-wrap p + ul, .legal-wrap ul + p { margin-top: 10px; }
.legal-wrap ul { padding-left: 22px; margin: 10px 0 0; }
.legal-wrap li + li { margin-top: 4px; }

@media (max-width: 880px) {
  .hero { padding: 40px 0 40px; }
  .hero-in { grid-template-columns: 1fr; gap: 36px; }
  .steps, .feats { grid-template-columns: 1fr; }
  .dl-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .sec { padding: 52px 0; }
}
@media (max-width: 520px) {
  .nav-in { gap: 10px; }
  .nav-act { gap: 2px; }
  .nav-act .btn { padding: 8px 10px; font-size: 14px; }
  .lang-opt { padding: 6px 5px; }
  .brand span { display: none; }
  .cta .btn { flex: 1; }
}