/* MyAgentHubs — shared site shell.
   Rules here are byte-identical (or safely var-driven defaults) across two or
   more of the four pages. Each page keeps its own small inline <style> for
   :root accent overrides plus anything that differs or is page-unique. */

:root {
  --bg: #F5F2EC;
  --card: #FDFBF7;
  --ink: #2A2622;
  --ink-2: #6B635A;
  --ink-3: #9A9089;
  --line: #E4DDD2;
  --accent: #D97757;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  background: var(--bg); color: var(--ink);
  font: 16px/1.65 -apple-system, "PingFang SC", "Hiragino Sans", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 32px; }

/* nav */
nav { position: sticky; top: 0; background: rgba(245,242,236,.88); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); z-index: 10; }
.nav-in { display: flex; align-items: center; gap: 28px; height: 60px; }
.wordmark { font-weight: 700; letter-spacing: -.02em; font-size: 17px; display: flex; align-items: center; gap: 9px; }
.wordmark .dot { width: 22px; height: 22px; border-radius: 6px; background: #D97757; position: relative; }
.wordmark .dot::after { content: ""; position: absolute; inset: 6px; border-radius: 3px; background: var(--bg); }
.nav-links { display: flex; gap: 22px; font-size: 14px; color: var(--ink-2); margin-left: 8px; }
.nav-links a:hover { color: var(--ink); }
.nav-links a.on { color: var(--ink); font-weight: 600; }
.nav-cta { margin-left: auto; display: flex; gap: 10px; align-items: center; }
/* language switcher — <details>, so it works with zero JS and on touch.
   One entry today (EN); adding zh-CN is one <a> in .langmenu. */
.lang { position: relative; font-size: 12.5px; color: var(--ink-3); font-family: var(--mono); letter-spacing: .02em; }
.lang summary { display: flex; align-items: center; gap: 5px; cursor: pointer; list-style: none; padding: 5px 8px; border-radius: 8px; transition: all .15s; }
.lang summary::-webkit-details-marker { display: none; }
.lang summary:hover { color: var(--ink); background: rgba(42,38,34,.045); }
.lang summary svg { width: 15px; height: 15px; stroke: currentColor; stroke-width: 1.6; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.langmenu { position: absolute; right: 0; top: calc(100% + 6px); min-width: 136px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 5px; box-shadow: 0 14px 32px -16px rgba(42,38,34,.4); z-index: 20; }
.langmenu a, .langmenu span { display: block; padding: 7px 10px; border-radius: 7px; font-family: -apple-system, "PingFang SC", sans-serif; font-size: 13.5px; letter-spacing: 0; color: var(--ink-2); }
.langmenu a:hover { background: var(--bg); color: var(--ink); }
.langmenu .on { color: var(--ink); font-weight: 600; }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 7px; border-radius: 9px; padding: 8px 16px; font-size: 14px; font-weight: 600; border: 1px solid var(--line); background: var(--card); transition: all .15s; }
.btn:hover { border-color: var(--ink-3); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.lg { padding: 11px 20px; font-size: 15px; border-radius: 10px; }

/* section kickers / heads */
.kicker { font-family: var(--mono); font-size: 12.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.sec-head p { color: var(--ink-2); font-size: 16.5px; margin-top: 12px; }
.sec-head h2 { font-size: 30px; letter-spacing: -.025em; margin-top: 10px; }

/* hero shell */
.hero { text-align: center; }
.hero h1 { letter-spacing: -.03em; font-weight: 750; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .ctas { display: flex; gap: 12px; justify-content: center; }
.hero .meta { margin-top: 18px; font-size: 13px; color: var(--ink-3); font-family: var(--mono); }

/* image frame (agentloom / protolens screenshots) */
.shot img { width: 100%; display: block; }
.plate .frame { border: 1px solid var(--line); border-radius: 13px; overflow: hidden; background: var(--card); box-shadow: 0 18px 44px -30px rgba(42,38,34,.3); }
.plate .frame img { width: 100%; display: block; }

/* "why" section padding (agentloom / protolens) */
.why { padding: 86px 0 0; }

/* closing CTA strip (protolens / loomnote) */
.close { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--card); }
.close .wrap { padding: 44px 32px; display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.close h2 { font-size: 22px; letter-spacing: -.02em; }
.close p { color: var(--ink-2); font-size: 15px; margin-top: 6px; }

/* MCP code sample block (protolens / loomnote) */
.mcp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 30px; align-items: start; }
.mcp p { color: var(--ink-2); font-size: 15.5px; }
.mcp p + p { margin-top: 12px; }
pre { background: #16191E; color: #C9D3D1; border-radius: 12px; padding: 20px 22px; overflow-x: auto; font-family: var(--mono); font-size: 13px; line-height: 1.7; }
pre .v { color: #E0B583; }

/* footer */
footer { padding: 40px 0 56px; color: var(--ink-3); font-size: 13px; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
footer a { color: var(--ink-2); }
footer a:hover { color: var(--ink); }