:root {
  color-scheme: dark;
  --paper: #191a18;
  --ink: #e5e2d9;
  --muted: #a5a59b;
  --line: #393b34;
  --accent: #d5aa83;
  --mono: ui-monospace, SFMono-Regular, Consolas, 'Liberation Mono', monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 30px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.65 Arial, Helvetica, sans-serif; }
a { color: inherit; text-decoration-color: #66695c; text-underline-offset: 4px; }
a:hover { color: var(--accent); }
button { font: inherit; cursor: pointer; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; }
::selection { background: #69503b; color: #fff; }
.site-shell { max-width: 1020px; margin: auto; padding: 0 42px; }
.skip { position: absolute; top: -80px; padding: 10px; background: var(--ink); color: var(--paper); }
.skip:focus { top: 0; }
header { display: flex; align-items: center; justify-content: space-between; padding: 32px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; font: bold 27px var(--mono); letter-spacing: -1.5px; text-decoration: none; }
.brand .wordmark { color: var(--ink); font-weight: bold; }
.project-icon { display: block; width: 80px; height: 80px; object-fit: contain; }
.brand .wordmark span { font-weight: normal; color: var(--muted); }
nav { display: flex; gap: 25px; font: 15px var(--mono); }
nav a { text-decoration: none; }
.menu-toggle { display: none; }
.hero { padding: 48px 0 60px; }
.project-name { margin: 0 0 22px; font: 15px var(--mono); color: var(--muted); }
h1 { max-width: 880px; margin: 0 0 26px; font: normal clamp(36px, 4.2vw, 50px)/1.16 Georgia, 'Times New Roman', serif; letter-spacing: -1.5px; }
.intro { max-width: 580px; margin: 0 0 25px; color: var(--muted); font-size: 18px; line-height: 1.7; }
.text-link { color: var(--accent); font-size: 16px; }
.toast-button { display: inline-block; padding: 11px 18px; border: 1px solid var(--accent); border-radius: 4px; background: var(--accent); color: var(--paper); font-size: 16px; text-decoration: none; }
.toast-button:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
h2 { margin: 0; font: 500 17px/1.5 var(--mono); }
h3 { margin: 0 0 12px; font-size: 17px; font-weight: normal; }
p { margin: 0 0 16px; }
.prose-section { display: grid; grid-template-columns: 195px minmax(0, 1fr); gap: 30px; padding: 34px 0; border-top: 1px solid var(--line); }
.section-body { max-width: 650px; color: var(--muted); font-size: 17px; }
.section-body p:last-child { margin-bottom: 0; }
.technical-note { font: 14px/1.7 var(--mono); color: var(--muted); }
.library-list { margin: 0 0 23px; }
.library-list > div { margin-bottom: 21px; }
.library-list > div:last-child { margin-bottom: 0; }
.library-list dt { margin-bottom: 4px; color: var(--ink); font-size: 16px; }
code { font-family: var(--mono); overflow-wrap: anywhere; }
.library-list dd { margin: 0; font-size: 16px; }
.toast-tabs.tabs-ready { display: grid; grid-template-columns: 170px minmax(0, 1fr); gap: 24px; align-items: start; }
.toast-tab-list { display: flex; flex-direction: column; gap: 6px; border-right: 1px solid var(--line); padding-right: 14px; }
.toast-tab-list[hidden] { display: none; }
.toast-tab-list button { padding: 9px 12px; border: 1px solid var(--line); border-radius: 4px; background: transparent; color: var(--muted); font: 14px/1.4 var(--mono); text-align: left; overflow-wrap: anywhere; }
.toast-tab-list button:hover { color: var(--ink); border-color: var(--muted); }
.toast-tab-list button[aria-selected="true"] { background: var(--accent); border-color: var(--accent); color: var(--paper); }
.toast-panel { padding: 22px 0; }
.tabs-ready .toast-panel { padding: 9px 0; }
.toast-panel h3 { color: var(--ink); }
.toast-panel p { font-size: 16px; }
.toast-panel:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; }
@media (max-width: 460px) {
  .toast-tabs.tabs-ready { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .toast-tab-list { border-right: 0; border-bottom: 1px solid var(--line); padding: 0 0 14px; }
}
details { border-top: 1px solid var(--line); padding: 13px 0; }
summary { cursor: pointer; font-size: 15px; color: var(--ink); }
details p { margin: 13px 0 0; font-size: 16px; }
.last-section { padding-bottom: 50px; }
footer { display: flex; justify-content: space-between; gap: 20px; padding: 22px 0 35px; border-top: 1px solid var(--line); color: var(--muted); font: 13px/1.6 var(--mono); }
footer a { white-space: nowrap; }
@media (max-width: 700px) {
  .site-shell { padding: 0 24px; }
  header { padding: 25px 0; }
  nav { gap: 16px; font-size: 14px; }
  .hero { padding: 32px 0 40px; }
  h1 { letter-spacing: -.8px; }
  .prose-section { grid-template-columns: 1fr; gap: 17px; padding: 27px 0; }
  footer { flex-wrap: wrap; }
}
@media (max-width: 460px) {
  header { position: relative; }
  nav { display: none; position: absolute; top: 68px; left: 0; right: 0; background: var(--paper); border: 1px solid var(--line); padding: 18px 12px; justify-content: space-between; z-index: 2; }
  nav.open { display: flex; }
  .menu-toggle { display: block; background: none; color: var(--ink); border: 1px solid var(--line); padding: 7px 10px; font: 14px var(--mono); }
  h1 br { display: none; }
  .intro { font-size: 17px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

.brand-text { display: flex; flex-direction: column; gap: 5px; }
.brand-description { color: var(--muted); font: normal 13px/1.4 var(--mono); letter-spacing: 0; }
@media (max-width: 700px) {
  header { flex-wrap: wrap; gap: 22px; }
  nav { flex-wrap: wrap; }
}
@media (max-width: 460px) {
  header { gap: 10px; }
  .brand { gap: 8px; }
  .brand-description { max-width: 195px; font-size: 12px; }
  .project-icon { width: 34px; height: 34px; }
  nav { top: 80px; }
}

.interaction-section { padding: 30px 0 35px; border-top: 1px solid var(--line); }
.protocol-figure { margin: 27px 0 0; }
.protocol-diagram { display: grid; grid-template-columns: minmax(0, 1fr) minmax(150px, .8fr) minmax(0, 1fr); align-items: start; }
.protocol-agent { padding: 22px; border: 1px solid var(--line); }
.protocol-agent h3 { font: 17px var(--mono); margin: 0 0 17px; }
.private-input { color: var(--muted); font: 14px/1.6 var(--mono); margin: 0; }
.local-connector { display: block; margin: 10px 0; color: var(--muted); font: 13px/1.5 var(--mono); }
.agent-tools { border-top: 1px solid var(--line); padding-top: 13px; font: 15px var(--mono); }
.agent-tools small { display: block; color: var(--muted); font: 13px/1.5 var(--mono); margin-top: 7px; }
.protocol-exchange { padding-top: 19px; text-align: center; color: var(--accent); font: 13px/1.6 var(--mono); }
.protocol-exchange small { color: var(--muted); font-size: 12px; }
.message-line { position: relative; height: 1px; margin: 13px 0; border-top: 1px dashed #827460; }
.message-line::before, .message-line::after { position: absolute; top: -9px; color: var(--accent); font-size: 15px; }
.message-line::before { content: '←'; left: 0; }
.message-line::after { content: '→'; right: 0; }
.message-line i { position: absolute; top: -3px; width: 5px; height: 5px; background: var(--accent); animation: protocol-message 4s ease-in-out infinite alternate; }
.protocol-outcome { margin-top: 17px; font-size: 15px; color: var(--muted); }
.protocol-outcome > span { color: var(--ink); font: 14px var(--mono); margin-right: 15px; }
.protocol-figure figcaption { margin-top: 13px; max-width: 720px; font-size: 14px; color: var(--muted); }
@keyframes protocol-message { from { left: 12%; } to { left: 85%; } }
@media (max-width: 600px) {
  .protocol-diagram { grid-template-columns: 1fr; }
  .protocol-agent { padding: 20px; }
  .protocol-exchange { padding: 18px 0; }
  .message-line { width: 1px; height: 35px; border-top: 0; border-left: 1px dashed #827460; margin: 8px auto; }
  .message-line::before { content: '↑'; left: -4px; top: -7px; }
  .message-line::after { content: '↓'; left: -4px; top: auto; bottom: -8px; }
  .message-line i { left: -3px; top: 15px; animation: none; }
}
@media (prefers-reduced-motion: reduce) { .message-line i { animation: none; left: 50%; } }

.hero-subtitle { margin: -10px 0 26px; color: var(--ink); font: normal clamp(23px, 2.5vw, 30px)/1.35 Georgia, 'Times New Roman', serif; letter-spacing: -.4px; }

.architecture-section { padding: 34px 0; border-top: 1px solid var(--line); }
.architecture-intro { max-width: 720px; margin: 17px 0 25px; color: var(--muted); }
.architecture-figure { margin: 0; }
.architecture-diagram { display: grid; grid-template-columns: minmax(0, 1fr) 125px minmax(0, .55fr); grid-template-areas: "agent . ." "mcp . ." "core . ." "dispatch . ." "plugins fetch registry"; align-items: center; }
.architecture-node { padding: 20px; border: 1px solid var(--line); text-align: center; }
.architecture-diagram h3 { margin: 0 0 8px; color: var(--ink); font: 16px/1.5 var(--mono); }
.architecture-diagram p { margin: 0; color: var(--muted); font-size: 14px; }
.architecture-agent { grid-area: agent; }
.architecture-core { grid-area: core; border-color: var(--accent); }
.architecture-core code { display: block; margin-bottom: 10px; color: var(--accent); font-size: 13px; }
.architecture-connector { display: flex; align-items: center; justify-content: center; gap: 12px; padding: 12px 0; color: var(--accent); font: 12px/1.5 var(--mono); text-align: center; }
.architecture-connector > span[aria-hidden] { font-size: 25px; }
.architecture-mcp { grid-area: mcp; }
.architecture-dispatch { grid-area: dispatch; }
.architecture-plugins { grid-area: plugins; padding: 20px; border: 1px dashed var(--line); }
.architecture-plugins h3 span { display: block; color: var(--muted); font-size: 12px; }
.architecture-plugins ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 16px 0; padding: 0; list-style: none; }
.architecture-plugins li { padding: 12px; border: 1px solid var(--line); font: 13px/1.5 var(--mono); }
.architecture-fetch { grid-area: fetch; flex-direction: column; gap: 0; }
.architecture-registry { grid-area: registry; }
.architecture-figure figcaption { max-width: 720px; margin-top: 20px; color: var(--muted); font-size: 14px; }
@media (max-width: 700px) {
  .architecture-diagram { grid-template-columns: minmax(0, 1fr); grid-template-areas: "agent" "mcp" "core" "dispatch" "plugins" "fetch" "registry"; }
  .architecture-fetch { flex-direction: row; }
  .architecture-fetch > .architecture-fetch-arrow { font-size: 0; }
  .architecture-fetch-arrow::after { content: '↑'; font-size: 25px; }
}
@media (max-width: 380px) {
  .architecture-plugins ul { grid-template-columns: minmax(0, 1fr); }
}