:root {
  --ground: #f4f6f5;
  --raised: #ffffff;
  --step: #e9eeec;
  --ink: #0e1714;
  --ink-2: #39443f;
  --ink-3: #5b6762;
  --green: #0d6b55;
  --green-press: #0a5645;
  --read: #d9eee6;
  --read-ink: #0a4a3b;
  --head: "Lexend", "Helvetica Neue", Arial, sans-serif;
  --text: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --margin: clamp(20px, 4vw, 56px);
  --max: 1240px;
  --r: 10px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 400 18px/1.55 var(--text);
  font-variant-numeric: tabular-nums;
  caret-color: var(--green);
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--read); color: var(--ink); }
:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; border-radius: 4px; }
a { color: var(--green); text-underline-offset: 3px; text-decoration-thickness: 1px; }
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3 { font-family: var(--head); font-weight: 600; letter-spacing: -.025em; margin: 0; text-wrap: balance; }
button { cursor: pointer; }
.skip { position: absolute; left: 12px; top: -48px; padding: 10px 14px; background: var(--ink); color: #fff; z-index: 30; border-radius: 6px; }
.skip:focus { top: 12px; }
::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-thumb { background: #c4cdc9; border: 3px solid var(--ground); border-radius: 12px; }

/* bar */
.bar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  height: 64px; padding: 0 var(--margin);
  background: var(--ground);
}
.bar.scrolled { background: var(--raised); }
.bar-name { font: 600 17px var(--head); letter-spacing: -.02em; color: var(--ink); text-decoration: none; }
.bar-nav { display: flex; align-items: center; gap: clamp(14px, 2.4vw, 32px); font-size: 16px; }
.bar-nav > a { color: var(--ink-2); text-decoration: none; transition: color .2s; }
.bar-nav > a:hover { color: var(--green); }
.lang { display: inline-flex; background: var(--step); border-radius: 999px; padding: 3px; }
.lang button { border: 0; background: transparent; font: 600 14px var(--text); color: var(--ink-3); padding: 6px 12px; border-radius: 999px; min-height: 36px; transition: background .2s, color .2s; }
.lang button[aria-pressed="true"] { background: var(--ink); color: #fff; }

main { max-width: var(--max); margin: 0 auto; padding: 0 var(--margin); }

/* hero */
.hero {
  display: grid; grid-template-columns: 220px minmax(0, 1fr) 300px;
  gap: clamp(24px, 3vw, 48px); align-items: start;
  padding: clamp(24px, 4vw, 56px) 0 clamp(28px, 3vw, 40px);
}
.portrait { margin: 0; border-radius: var(--r); overflow: hidden; background: var(--step); aspect-ratio: 1; }
.portrait img { width: 100%; height: 100%; object-fit: cover; }
.who h1 { font-size: clamp(40px, 5.2vw, 72px); line-height: .98; letter-spacing: -.035em; }
.statement { margin: 18px 0 0; font-size: clamp(19px, 1.6vw, 22px); line-height: 1.45; color: var(--ink); max-width: 34ch; }
.certs { list-style: none; margin: 22px 0 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.certs li { font-weight: 600; font-size: 17px; line-height: 1.35; }
.certs li::before { content: ""; display: inline-block; width: 10px; height: 10px; border-radius: 3px; background: var(--green); margin-right: 10px; vertical-align: 1px; }
.certs-note { font-weight: 400; color: var(--ink-3); }
.reach { background: var(--raised); border-radius: var(--r); padding: 22px; display: flex; flex-direction: column; gap: 14px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 0 20px; border-radius: 999px; border: 0;
  font: 600 17px var(--text); text-decoration: none;
  transition: background .2s var(--ease), color .2s, transform .15s var(--ease);
}
.btn:active { transform: scale(.98); }
.btn-solid { background: var(--green); color: #fff; }
.btn-solid:hover { background: var(--green-press); }
.btn-line { background: var(--step); color: var(--ink); }
.btn-line:hover { background: #dce4e0; }
.cv-alt { font-size: 15px; color: var(--ink-2); align-self: center; margin-top: -4px; }
.contact { margin: 4px 0 0; display: flex; flex-direction: column; gap: 12px; }
.contact dt { font-size: 14px; color: var(--ink-3); }
.contact dd { margin: 0; font-size: 16px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; overflow-wrap: anywhere; }
.contact a { color: var(--ink); text-decoration: none; }
.contact a:hover { color: var(--green); text-decoration: underline; }
.mini { border: 0; background: var(--step); color: var(--ink-2); font: 600 13px var(--text); padding: 4px 10px; border-radius: 999px; min-height: 28px; transition: background .2s; }
.mini:hover { background: #dce4e0; }
.mini.done, .copy.done { background: var(--read); color: var(--read-ink); }

/* ask */
.ask-zone { padding-bottom: 8px; }
.ask label { display: block; font: 500 20px var(--head); letter-spacing: -.015em; margin-bottom: 10px; }
.ask-row { display: flex; gap: 10px; background: var(--raised); border-radius: 999px; padding: 6px 6px 6px 24px; outline: 2px solid transparent; transition: outline-color .25s var(--ease); }
.ask-row:focus-within { outline-color: var(--green); }
.ask input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; font: 400 19px var(--text); color: var(--ink); min-height: 48px; }
.ask input::placeholder { color: var(--ink-3); }
.ask button { min-height: 52px; padding: 0 28px; border: 0; border-radius: 999px; background: var(--ink); color: #fff; font: 600 17px var(--text); transition: background .2s; }
.ask button:hover { background: #24322d; }
.ask button[aria-busy="true"] { background: var(--ink-3); cursor: progress; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; }
.chip { min-height: 40px; padding: 8px 16px; border: 0; border-radius: 999px; background: var(--step); color: var(--ink); font: 400 16px/1.25 var(--text); text-align: left; transition: background .2s, color .2s; }
.chip:hover { background: var(--read); color: var(--read-ink); }
.chip:disabled { opacity: .55; cursor: default; }

.answer { margin-top: 18px; background: var(--raised); border-radius: var(--r); padding: 22px 26px; min-height: 120px; }
.answer-empty { margin: 0; color: var(--ink-2); max-width: 70ch; }
.answer-q { margin: 0 0 8px; font: 500 15px var(--head); color: var(--ink-3); }
.answer-body { font-size: 18px; line-height: 1.6; max-width: 72ch; }
.answer-body p { margin: 0 0 12px; } .answer-body p:last-child { margin-bottom: 0; }
.answer-body ul, .answer-body ol { margin: 6px 0 12px; padding-left: 22px; }
.answer-body.streaming::after { content: ""; display: inline-block; width: 9px; height: 18px; margin-left: 3px; vertical-align: -3px; background: var(--green); border-radius: 2px; animation: blink 1s steps(2) infinite; }
.answer-body .err { color: #a3341e; }
.answer-full.show { animation: rise .45s var(--ease) both; }
.cite { border: 0; margin: 0 1px; padding: 1px 7px; border-radius: 999px; vertical-align: 1px; background: var(--read); color: var(--read-ink); font: 600 13px var(--text); transition: background .15s, color .15s; }
.cite:hover, .cite.hot { background: var(--green); color: #fff; }
.answer-src { margin-top: 16px; padding: 14px 16px; border-radius: 8px; background: var(--ground); display: flex; flex-direction: column; gap: 4px; font-size: 15px; color: var(--ink-2); }
.answer-src .doc { font-weight: 600; color: var(--ink); margin-top: 6px; }
.answer-src .doc:first-child { margin-top: 0; }
.answer-src .src { display: flex; gap: 8px; align-items: baseline; }
.answer-src .src b { font-weight: 600; color: var(--green); min-width: 18px; }
.answer-src .src.hot { color: var(--ink); }
.chips-follow { margin-top: 16px; }
.chip-quiet { background: transparent; color: var(--green); padding-left: 0; padding-right: 0; margin-right: 18px; min-height: 36px; text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 1px; }
.chip-quiet:hover { background: transparent; color: var(--green-press); }
.answer:focus { outline: none; }
.answer { scroll-margin-top: 90px; }

/* map */
.mcp-band {
  margin-top: 20px; display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 20px 40px; align-items: center; padding: 28px 32px; border-radius: 14px; background: var(--read);
}
.mcp-band h2 { font-size: clamp(22px, 2.2vw, 28px); color: var(--read-ink); }
.mcp-lead p { margin: 8px 0 0; color: var(--ink); max-width: 52ch; }
.endpoint { display: flex; gap: 8px; align-items: center; background: var(--raised); border-radius: 999px; padding: 6px 6px 6px 20px; }
.endpoint code { flex: 1; min-width: 0; overflow-x: auto; scrollbar-width: none; white-space: nowrap; font: 500 15px ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--ink); }
.mcp-more { margin-top: 10px; }
.mcp-more summary { cursor: pointer; font-weight: 600; color: var(--read-ink); padding: 8px 0; list-style: none; display: inline-flex; align-items: center; gap: 8px; min-height: 40px; }
.mcp-more summary::-webkit-details-marker { display: none; }
.mcp-more summary::after { content: ""; width: 8px; height: 8px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(45deg) translateY(-3px); transition: transform .2s var(--ease); }
.mcp-more[open] summary::after { transform: rotate(-135deg) translateY(-1px); }
.mcp-more[open] > *:not(summary) { animation: rise .35s var(--ease) both; }
.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0 10px; }
.tabs button { border: 0; border-radius: 999px; background: transparent; color: var(--read-ink); font: 600 15px var(--text); padding: 8px 14px; min-height: 40px; transition: background .2s, color .2s; }
.tabs button:hover { background: rgba(255,255,255,.6); }
.tabs button[aria-selected="true"] { background: var(--ink); color: #fff; }
.tabpanel pre { margin: 0; padding: 14px 16px; border-radius: 8px; background: var(--raised); overflow-x: auto; font: 14px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; }
.tabpanel p { margin: 0 0 10px; font-size: 16px; color: var(--ink); }
.tools-line { margin: 12px 0 0; font-size: 15px; color: var(--ink-2); line-height: 2; }
.tools-line code { font: 13px ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--raised); padding: 3px 8px; border-radius: 6px; margin-right: 2px; white-space: nowrap; }
.map-zone { padding: 56px 0 24px; }
.map-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; margin-bottom: 18px; }
.map-head h2 { font-size: clamp(28px, 3vw, 40px); }
.map-key { margin: 0; display: flex; gap: 18px; align-items: center; flex-wrap: wrap; font-size: 15px; color: var(--ink-2); }
.key { display: inline-flex; align-items: center; gap: 8px; }
.sw { width: 18px; height: 18px; border-radius: 5px; display: inline-block; }
.sw-read { background: var(--read); } .sw-cited { background: var(--green); }
.map-count { color: var(--ink-3); }
.map { display: flex; flex-direction: column; gap: 6px; }
.row { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 16px; align-items: start; padding: 12px 16px; border-radius: var(--r); background: var(--raised); }
.row-name { margin: 0; font: 500 16px/1.3 var(--head); letter-spacing: -.01em; padding-top: 7px; }
.row-name span { display: block; font: 400 14px var(--text); color: var(--ink-3); letter-spacing: 0; margin-top: 2px; }
.tiles { display: flex; flex-wrap: wrap; gap: 6px; }
.tile {
  position: relative; border: 0; border-radius: 8px; padding: 8px 12px; min-height: 40px;
  background: var(--step); color: var(--ink); font: 400 15.5px/1.25 var(--text); text-align: left;
  outline: 2px solid transparent; outline-offset: -2px;
  transition: background .45s var(--ease), color .45s var(--ease), outline-color .2s var(--ease);
}
.tile:hover { outline-color: var(--ink); }
.dimmed .tile:not(.read):not(.cited) { color: var(--ink-3); background: #eef2f0; }
.tile.read { background: var(--read); color: var(--read-ink); }
.tile.cited { background: var(--green); color: #fff; padding-right: 34px; }
.tile.cited::after { content: attr(data-n); position: absolute; right: 8px; top: 50%; transform: translateY(-50%); min-width: 20px; height: 20px; border-radius: 999px; background: #fff; color: var(--green); font: 600 12px/20px var(--text); text-align: center; }
.tile.hot { outline: 3px solid var(--ink); outline-offset: 2px; }
.tile.pop { animation: pop .7s var(--ease) both; }
.js .map.scan .tile { animation: wave 1.3s var(--ease) both; animation-delay: calc(var(--i) * 18ms); }

/* facts */
.facts-band { margin: 64px 0 0; padding: 40px 40px; background: var(--ink); color: #fff; border-radius: 14px; }
.facts-band h2 { font-size: 22px; color: #cfe2da; }
.facts { margin: 22px 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
.facts div { display: flex; flex-direction: column-reverse; gap: 6px; }
.facts dd { margin: 0; font: 600 clamp(40px, 4.6vw, 64px)/1 var(--head); letter-spacing: -.04em; }
.facts dt { font-size: 17px; color: #cfe2da; max-width: 22ch; }

/* how */
.how { padding: 120px 0 0; }
.how h2 { font-size: clamp(28px, 3vw, 40px); }
.how-grid { margin-top: 24px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 48px; }
.how h3 { font-size: 20px; letter-spacing: -.015em; }
.how p { margin: 8px 0 0; color: var(--ink); max-width: 56ch; }

/* footer */
.foot { max-width: var(--max); margin: 120px auto 0; padding: 48px var(--margin) 40px; }
.foot-name { margin: 0 0 14px; font: 600 clamp(44px, 8vw, 112px)/.95 var(--head); letter-spacing: -.045em; color: var(--ink); }
.foot-line { margin: 4px 0 0; font-size: 16px; color: var(--ink-2); }
.foot-line a { color: var(--ink); }

/* motion */
@keyframes rise { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: none; } }
@keyframes blink { 50% { opacity: 0; } }
@keyframes wave { 0% { background: var(--step); } 40% { background: var(--read); } 100% { background: var(--step); } }
@keyframes pop { 0% { transform: scale(1); } 35% { transform: scale(1.06); } 100% { transform: scale(1); } }
.js .in { animation: rise .8s var(--ease) both; animation-delay: var(--d, 0ms); }
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); transition-delay: var(--d, 0ms); }
.js .reveal.seen { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* responsive */
@media (max-width: 1100px) {
  .hero { grid-template-columns: 180px minmax(0, 1fr); }
  .reach { grid-column: 1 / -1; display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 12px 24px; }
  .reach .contact { grid-column: 1 / -1; flex-direction: row; flex-wrap: wrap; gap: 12px 32px; }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  body { font-size: 17px; }
  .facts-band { padding: 28px 24px; }
  .bar-nav > a { display: none; }
  .hero { grid-template-columns: 112px minmax(0, 1fr); gap: 18px 18px; padding-top: 20px; }
  .portrait { grid-row: span 1; }
  .who h1 { font-size: 36px; }
  .statement { grid-column: 1 / -1; }
  .who { display: contents; }
  .who h1 { align-self: end; grid-column: 2; grid-row: 1; }
  .statement { margin-top: 0; }
  .certs { grid-column: 1 / -1; margin-top: 0; }
  .reach { grid-template-columns: 1fr; margin-top: 18px; }
  .reach .btn { width: 100%; }
  .reach .contact { flex-direction: column; }
  .ask label { font-size: 18px; }
  .ask-row { padding-left: 18px; }
  .ask button { padding: 0 20px; }
  .answer { padding: 18px; }
  .row { grid-template-columns: 1fr; gap: 8px; padding: 12px; }
  .row-name { padding-top: 0; }
  .mcp-band { grid-template-columns: minmax(0, 1fr); padding: 22px 20px; }
  .endpoint { flex-direction: column; align-items: stretch; border-radius: 14px; padding: 12px; gap: 10px; }
  .endpoint code { white-space: normal; overflow-wrap: anywhere; font-size: 14px; padding: 2px 4px; }
  .how { padding-top: 88px; }
  .how-grid { grid-template-columns: minmax(0, 1fr); }
  .facts { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 22px; }
  .foot { margin-top: 88px; }
}