/* GEAP Governance demo guide — self-contained, no external assets. */

:root {
  --bg:            #ffffff;
  --bg-sunken:     #f6f8fa;
  --bg-raised:     #ffffff;
  --border:        #d8dee4;
  --border-soft:   #e8ecf0;
  --text:          #1f2328;
  --text-muted:    #59636e;
  --text-faint:    #848d97;
  --accent:        #1a56db;
  --accent-soft:   #eef3ff;
  --good:          #1a7f37;
  --good-soft:     #eaf6ec;
  --warn:          #9a6700;
  --warn-soft:     #fdf6e3;
  --danger:        #b42318;
  --code-bg:       #f2f4f7;
  --shadow:        0 1px 2px rgba(31,35,40,.06), 0 3px 8px rgba(31,35,40,.05);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html[data-theme="dark"] {
  --bg:            #0d1117;
  --bg-sunken:     #161b22;
  --bg-raised:     #161b22;
  --border:        #30363d;
  --border-soft:   #21262d;
  --text:          #e6edf3;
  --text-muted:    #9198a1;
  --text-faint:    #6e7681;
  --accent:        #6ea8ff;
  --accent-soft:   #16233d;
  --good:          #3fb950;
  --good-soft:     #132d1a;
  --warn:          #d29922;
  --warn-soft:     #2d2410;
  --danger:        #f85149;
  --code-bg:       #1c2128;
  --shadow:        0 1px 2px rgba(0,0,0,.3), 0 3px 8px rgba(0,0,0,.25);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.62;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ── top bar ─────────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: saturate(180%) blur(6px);
}
.topbar-inner {
  max-width: 1400px; margin: 0 auto;
  padding: .7rem 1.6rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brand { font-weight: 650; letter-spacing: -.01em; }
.brand-mark { color: var(--accent); margin-right: .25rem; }
.topbar-meta { font-size: .8rem; color: var(--text-muted); display: flex; align-items: center; gap: .6rem; }
.tabs { display: flex; gap: .25rem; margin-right: auto; margin-left: 1.2rem; }
.tabs a {
  font-size: .84rem; font-weight: 600; color: var(--text-muted); text-decoration: none;
  padding: .3rem .7rem; border-radius: 6px; border: 1px solid transparent;
}
.tabs a:hover { color: var(--text); background: var(--bg-sunken); }
.tabs a.active { color: var(--accent); background: var(--bg-sunken); border-color: var(--border); }
#theme-toggle {
  border: 1px solid var(--border); background: var(--bg-sunken); color: var(--text-muted);
  border-radius: 6px; width: 28px; height: 26px; cursor: pointer; font-size: .9rem; line-height: 1;
}
#theme-toggle:hover { color: var(--text); border-color: var(--text-faint); }

/* ── layout ──────────────────────────────────────────────── */
.layout {
  max-width: 1400px; margin: 0 auto;
  display: grid; grid-template-columns: 232px minmax(0, 1fr);
  gap: 2.4rem; padding: 0 1.6rem;
}

.sidebar {
  position: sticky; top: 52px; align-self: start;
  max-height: calc(100vh - 52px); overflow-y: auto;
  padding: 1.6rem 0 3rem;
  font-size: .855rem;
}
.nav-label {
  margin: 1.3rem 0 .4rem; font-size: .68rem; font-weight: 700;
  letter-spacing: .09em; text-transform: uppercase; color: var(--text-faint);
}
.nav-label:first-child { margin-top: 0; }
.sidebar a {
  display: block; padding: .26rem .6rem; margin-left: -.6rem;
  color: var(--text-muted); text-decoration: none; border-radius: 6px;
  border-left: 2px solid transparent;
}
.sidebar a:hover { color: var(--text); background: var(--bg-sunken); }
.sidebar a.active {
  color: var(--accent); font-weight: 600;
  background: var(--accent-soft); border-left-color: var(--accent);
}

main { padding: 2rem 0 5rem; min-width: 0; max-width: 62rem; }

/* ── typography ──────────────────────────────────────────── */
h1 { font-size: 2rem; line-height: 1.2; letter-spacing: -.022em; margin: 0 0 .8rem; }
h2 {
  font-size: 1.42rem; letter-spacing: -.016em; margin: 0 0 1rem;
  padding-bottom: .5rem; border-bottom: 1px solid var(--border);
}
h3 { font-size: 1.08rem; margin: 2rem 0 .7rem; letter-spacing: -.01em; }
h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: .07em;
     color: var(--text-faint); margin: 1.6rem 0 .55rem; font-weight: 700; }
p { margin: 0 0 .9rem; }
section { margin-bottom: 3.6rem; scroll-margin-top: 68px; }
a { color: var(--accent); }

.lede { font-size: 1.06rem; color: var(--text-muted); max-width: 54rem; }
.muted { color: var(--text-muted); font-size: .9rem; }
.mins {
  font-size: .72rem; font-weight: 600; color: var(--text-faint);
  border: 1px solid var(--border); border-radius: 20px; padding: .1rem .5rem;
  vertical-align: middle; margin-left: .4rem; text-transform: none; letter-spacing: 0;
}
.star { font-size: .78rem; color: var(--warn); font-weight: 600; margin-left: .3rem; }
.chapter-num {
  display: inline-grid; place-items: center;
  width: 1.6rem; height: 1.6rem; margin-right: .45rem;
  border-radius: 6px; background: var(--accent); color: #fff;
  font-size: .82rem; font-weight: 700; vertical-align: 2px;
}
.where {
  font-size: .68rem; font-weight: 600; letter-spacing: .05em; text-transform: uppercase;
  color: var(--text-faint); border: 1px solid var(--border-soft);
  border-radius: 4px; padding: .05rem .35rem; margin-left: .4rem;
}

code {
  font-family: var(--mono); font-size: .855em;
  background: var(--code-bg); border-radius: 4px; padding: .1em .35em;
  word-break: break-word;
}
pre {
  position: relative;
  background: var(--bg-sunken); border: 1px solid var(--border);
  border-radius: 8px; padding: .85rem 1rem; overflow-x: auto;
  margin: .5rem 0 1rem; font-size: .84rem; line-height: 1.55;
}
pre code { background: none; padding: 0; font-size: 1em; }
pre[data-copy] { cursor: copy; }
pre[data-copy]:hover { border-color: var(--accent); }
pre[data-copy]::after {
  content: "copy"; position: absolute; top: .45rem; right: .55rem;
  font-family: var(--sans); font-size: .64rem; letter-spacing: .06em; text-transform: uppercase;
  color: var(--text-faint); opacity: 0; transition: opacity .12s;
}
pre[data-copy]:hover::after { opacity: 1; }

/* ── tables ──────────────────────────────────────────────── */
table {
  width: 100%; border-collapse: collapse; margin: .6rem 0 1.4rem;
  font-size: .885rem; display: block; overflow-x: auto;
}
thead th {
  text-align: left; font-size: .7rem; text-transform: uppercase; letter-spacing: .07em;
  color: var(--text-faint); border-bottom: 1px solid var(--border);
  padding: .5rem .7rem; white-space: nowrap;
}
tbody td { border-bottom: 1px solid var(--border-soft); padding: .55rem .7rem; vertical-align: top; }
tbody tr:hover { background: var(--bg-sunken); }
td.yes { color: var(--good); font-weight: 600; }
td.no  { color: var(--warn); font-weight: 600; }

table.kv { display: table; }
table.kv th {
  text-align: left; width: 11rem; color: var(--text-faint);
  font-size: .72rem; text-transform: uppercase; letter-spacing: .06em;
  border-bottom: 1px solid var(--border-soft); padding: .55rem .7rem .55rem 0;
  vertical-align: top; white-space: nowrap;
}
table.kv td { padding-left: 0; }
table.policy-table code { font-size: .8em; }

/* ── pills ───────────────────────────────────────────────── */
.pill {
  display: inline-block; font-size: .66rem; font-weight: 700;
  letter-spacing: .05em; text-transform: uppercase;
  padding: .1rem .42rem; border-radius: 4px; white-space: nowrap;
}
.pill-on         { background: var(--good-soft); color: var(--good); }
.pill-verified   { background: var(--good-soft); color: var(--good); }
.pill-unverified { background: var(--warn-soft); color: var(--warn); }
.pill-bp         { background: var(--accent-soft); color: var(--accent); }
.tag {
  display: inline-block; background: var(--accent-soft); color: var(--accent);
  border-radius: 5px; padding: .05rem .4rem; font-size: .84em; font-weight: 500;
}

/* ── cards ───────────────────────────────────────────────── */
.grid { display: grid; gap: .9rem; margin: 1.1rem 0 1.6rem; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.card {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: 10px; padding: .95rem 1.05rem; box-shadow: var(--shadow);
}
.card p { margin: .35rem 0 0; font-size: .88rem; color: var(--text-muted); }
.card-kicker {
  font-size: .68rem; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--text-faint);
}
.card-big { font-size: 1.55rem; font-weight: 700; letter-spacing: -.02em; margin-top: .15rem; }
.card-sub { font-size: .82rem; color: var(--text-muted); }

/* ── callouts ────────────────────────────────────────────── */
.callout {
  border: 1px solid var(--border); border-left: 3px solid var(--accent);
  background: var(--bg-sunken); border-radius: 0 8px 8px 0;
  padding: .8rem 1rem; margin: 1rem 0; font-size: .9rem;
}
.callout p:last-child, .callout ol:last-child, .callout ul:last-child { margin-bottom: 0; }
.callout ol { margin: .5rem 0 0; padding-left: 1.2rem; }
.callout ol li { margin-bottom: .35rem; }
.callout-good { border-left-color: var(--good); background: var(--good-soft); }
.callout-warn { border-left-color: var(--warn); background: var(--warn-soft); }

.talk {
  background: var(--accent-soft); border-radius: 8px;
  padding: .85rem 1.05rem; margin: 1rem 0 1.2rem;
  font-size: .93rem; line-height: 1.6;
}
.talk b:first-child { color: var(--accent); }

.expect { display: block; font-size: .85rem; color: var(--text-muted); margin-top: -.4rem; }

/* ── steps / lists ───────────────────────────────────────── */
ol.steps, ul.steps, ul.tabs-list { margin: .4rem 0 1.1rem; padding-left: 1.25rem; }
ol.steps li, ul.steps li, ul.tabs-list li { margin-bottom: .5rem; }

/* ── prompts ─────────────────────────────────────────────── */
.prompt {
  position: relative; cursor: copy;
  background: var(--bg-sunken); border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0; padding: .8rem 3.4rem .8rem 1rem;
  margin: .5rem 0 1rem; font-size: .92rem; line-height: 1.55;
}
.prompt::after {
  content: "copy"; position: absolute; top: .5rem; right: .6rem;
  font-size: .64rem; letter-spacing: .06em; text-transform: uppercase;
  color: var(--text-faint); opacity: .55; transition: opacity .12s;
}
.prompt:hover { border-color: var(--accent); }
.prompt:hover::after { opacity: 1; color: var(--accent); }

.prompt-card {
  border: 1px solid var(--border); border-radius: 10px;
  padding: .9rem 1rem .5rem; margin-bottom: 1.1rem; box-shadow: var(--shadow);
  background: var(--bg-raised);
}
.prompt-head { font-size: .84rem; font-weight: 600; display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
.prompt-card .prompt { margin: .55rem 0 .5rem; }
.prompt-exp { font-size: .82rem; color: var(--text-muted); padding-bottom: .5rem; }

/* ── checklist ───────────────────────────────────────────── */
.checklist label {
  display: block; border: 1px solid var(--border); border-radius: 10px;
  padding: .8rem 1rem .6rem; margin-bottom: .8rem; background: var(--bg-raised);
}
.checklist label:has(input:checked) { opacity: .5; border-style: dashed; }
.checklist input { margin-right: .5rem; transform: scale(1.15); accent-color: var(--good); }
.checklist pre { margin: .55rem 0 .5rem; }

/* ── architecture diagram ────────────────────────────────── */
.arch {
  border: 1px solid var(--border); border-radius: 12px;
  padding: 1.3rem 1.2rem .9rem; margin: 1.2rem 0 1.6rem;
  background: var(--bg-sunken); text-align: center;
}
.arch-row { display: flex; justify-content: center; gap: .7rem; }
.arch-row-3 { flex-wrap: wrap; }
.arch-node {
  border: 1px solid var(--border); border-radius: 9px;
  background: var(--bg-raised); padding: .6rem .9rem;
  font-weight: 600; font-size: .93rem; box-shadow: var(--shadow);
  flex: 1 1 auto; max-width: 100%;
}
.arch-node span {
  display: block; font-weight: 400; font-size: .77rem;
  color: var(--text-muted); margin-top: .12rem; line-height: 1.45;
}
.arch-node code { font-size: .92em; }
.node-user  { max-width: 30rem; }
.node-agent { max-width: 40rem; border-color: var(--accent); }
.arch-row-3 .node-agent { max-width: none; flex: 1 1 30%; min-width: 14rem; }
.node-gw    { border-color: var(--good); max-width: 100%; }
.node-net   { max-width: 46rem; border-style: dashed; }
.node-mcp   { flex: 1 1 30%; min-width: 12rem; }
.arch-arrow { color: var(--text-faint); font-size: .95rem; margin: .35rem 0; }
.arch-arrow em { font-size: .74rem; font-style: normal; letter-spacing: .05em; text-transform: uppercase; }
.arch-lanes { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: .5rem; margin-top: .75rem; }
.lane {
  border: 1px dashed var(--border); border-radius: 7px;
  padding: .5rem .6rem; font-size: .76rem; font-weight: 400;
  line-height: 1.45; background: var(--bg);
}
.lane b { font-size: .68rem; letter-spacing: .05em; }
.lane-iap b { color: var(--accent); }
.lane-ma  b { color: var(--warn); }
.lane-sgp b { color: var(--good); }
.arch-foot { font-size: .78rem; color: var(--text-muted); margin: .8rem 0 0; }

/* Agent Gateway reference diagram: request path down the left, control plane beside it */
.arch-ref { display: grid; grid-template-columns: minmax(0, 1fr) 15.5rem; gap: 1.2rem; align-items: center; }
.arch-ref .arch-main { min-width: 0; }
.arch-ref .arch-side { min-width: 0; }
.arch-ref .arch-side .arch-lanes { grid-template-columns: 1fr; margin-top: 0; text-align: left; }
.arch-ref .arch-side .arch-foot { margin-top: .5rem; }
.arch-kicker {
  font-size: .66rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--text-faint); margin: 0 0 .3rem;
}
.arch-ref .arch-main .node-user, .arch-ref .arch-main .node-gw,
.arch-ref .arch-main .node-agent, .arch-ref .arch-main .node-mcp { max-width: 30rem; flex: 0 1 auto; min-width: 0; }
@media (max-width: 900px) { .arch-ref { grid-template-columns: 1fr; } }

/* ── footer / toast ──────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border); padding-top: 1.2rem;
  font-size: .82rem; color: var(--text-faint);
}
#toast {
  position: fixed; bottom: 1.5rem; left: 50%; transform: translateX(-50%) translateY(2rem);
  background: var(--text); color: var(--bg); padding: .45rem 1rem;
  border-radius: 20px; font-size: .82rem; font-weight: 600;
  opacity: 0; pointer-events: none; transition: all .18s ease; z-index: 100;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; gap: 0; }
  .sidebar {
    position: static; max-height: none; padding: 1rem 0 .5rem;
    border-bottom: 1px solid var(--border);
    display: flex; flex-wrap: wrap; gap: .1rem .3rem; align-items: center;
  }
  .nav-label { width: 100%; margin: .5rem 0 .1rem; }
  .sidebar a { margin-left: 0; border-left: none; border: 1px solid var(--border-soft); }
  .sidebar a.active { border-color: var(--accent); }
  main { padding-top: 1.4rem; }
  h1 { font-size: 1.6rem; }
}

/* ── Code view (lessons) ─────────────────────────────────── */
#code-toggle {
  white-space: nowrap;
  border: 1px solid var(--border); background: var(--bg-sunken); color: var(--text-muted);
  border-radius: 6px; height: 26px; padding: 0 .55rem; cursor: pointer;
  font-family: var(--mono); font-size: .74rem; font-weight: 600; letter-spacing: .02em; line-height: 1;
}
#code-toggle:hover { color: var(--text); border-color: var(--text-faint); }
html[data-code="on"] #code-toggle { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }

.lesson { display: none; }
html[data-code="on"] .lesson { display: block; }
html[data-code="on"] .code-off-hint { display: none; }

.lesson {
  border: 1px solid var(--accent); border-radius: 12px;
  margin: 1.6rem 0 1.2rem; background: var(--bg-raised); box-shadow: var(--shadow);
  overflow: hidden;
}
.lesson-head {
  display: flex; align-items: center; gap: .6rem; flex-wrap: wrap;
  padding: .8rem 1.05rem; background: var(--accent-soft);
  border-bottom: 1px solid var(--border-soft);
}
.lesson-num {
  font-family: var(--mono); font-size: .72rem; font-weight: 700; color: #fff;
  background: var(--accent); border-radius: 5px; padding: .12rem .45rem;
}
.lesson-title { font-weight: 650; font-size: 1rem; letter-spacing: -.01em; }
.lesson-file {
  margin-left: auto; font-family: var(--mono); font-size: .74rem; color: var(--text-muted);
  text-decoration: none; border: 1px solid var(--border); border-radius: 5px; padding: .12rem .45rem;
  background: var(--bg);
}
.lesson-intro { padding: .9rem 1.05rem 0; font-size: .92rem; color: var(--text-muted); margin: 0; }

.lesson-body {
  display: grid; grid-template-columns: minmax(15rem, 2fr) minmax(0, 3fr);
  gap: 0; margin-top: .9rem; border-top: 1px solid var(--border-soft);
}
.lesson-steps { padding: .8rem .6rem .8rem .8rem; border-right: 1px solid var(--border-soft); }
.lesson-step {
  display: block; width: 100%; text-align: left; cursor: pointer;
  border: 1px solid transparent; border-radius: 8px; background: none;
  padding: .55rem .7rem; margin-bottom: .25rem; font: inherit; color: var(--text);
}
.lesson-step:hover { background: var(--bg-sunken); }
.lesson-step.active { background: var(--accent-soft); border-color: var(--accent); }
.lesson-step-t { display: flex; gap: .55rem; align-items: baseline; font-weight: 600; font-size: .9rem; }
.lesson-step-n {
  font-family: var(--mono); font-size: .7rem; color: var(--text-faint); min-width: 1.1rem;
}
.lesson-step.active .lesson-step-n { color: var(--accent); }
.lesson-step-x { display: none; font-size: .86rem; color: var(--text-muted); margin: .4rem 0 0 1.65rem; line-height: 1.55; }
.lesson-step.active .lesson-step-x { display: block; }
.lesson-nav { display: flex; gap: .4rem; padding: .4rem .7rem 0; }
.lesson-nav button {
  font: inherit; font-size: .78rem; font-weight: 600; cursor: pointer;
  border: 1px solid var(--border); background: var(--bg); color: var(--text-muted);
  border-radius: 6px; padding: .25rem .7rem;
}
.lesson-nav button:hover:not(:disabled) { color: var(--accent); border-color: var(--accent); }
.lesson-nav button:disabled { opacity: .4; cursor: default; }

.lesson-code { min-width: 0; background: var(--bg-sunken); }
.lesson-code-label {
  font-size: .68rem; font-weight: 700; letter-spacing: .07em; text-transform: uppercase;
  color: var(--text-faint); padding: .6rem 1rem 0;
}
.lesson-code pre {
  margin: 0; border: none; border-radius: 0; background: none;
  max-height: 34rem; overflow: auto; padding: .5rem 0 .8rem; font-size: .8rem; line-height: 1.5;
}
.lesson-code pre + .lesson-code-label { border-top: 1px solid var(--border-soft); }
.cl { display: flex; white-space: pre; padding: 0 1rem 0 0; }
.cl-n {
  flex: 0 0 3.4rem; text-align: right; padding-right: .8rem; user-select: none;
  color: var(--text-faint); font-size: .74rem;
}
.cl.hl { background: var(--accent-soft); box-shadow: inset 3px 0 0 var(--accent); }
.cl.hl .cl-n { color: var(--accent); font-weight: 700; }
.cl.gap { color: var(--text-faint); font-style: italic; }
.lesson-code pre.dim .cl:not(.hl):not(.gap) { opacity: .55; }

/* python tokens */
.tk-k { color: #cf222e; }
.tk-b { color: #8250df; }
.tk-s { color: #0a3069; }
.tk-c { color: var(--text-faint); font-style: italic; }
.tk-n { color: #0550ae; }
.tk-d { color: #8250df; }
.tk-f { color: #6639ba; font-weight: 600; }
html[data-theme="dark"] .tk-k { color: #ff7b72; }
html[data-theme="dark"] .tk-b { color: #d2a8ff; }
html[data-theme="dark"] .tk-s { color: #a5d6ff; }
html[data-theme="dark"] .tk-n { color: #79c0ff; }
html[data-theme="dark"] .tk-d { color: #d2a8ff; }
html[data-theme="dark"] .tk-f { color: #d2a8ff; }

.lesson-check {
  border-top: 1px solid var(--border-soft); padding: .8rem 1.05rem .95rem; font-size: .9rem;
}
.lesson-check b { color: var(--accent); }
.lesson-check button {
  font: inherit; font-size: .78rem; font-weight: 600; cursor: pointer; margin-top: .4rem;
  border: 1px solid var(--border); background: var(--bg); color: var(--text-muted);
  border-radius: 6px; padding: .25rem .7rem;
}
.lesson-check button:hover { color: var(--accent); border-color: var(--accent); }
.lesson-check-a { display: none; margin: .55rem 0 0; color: var(--text-muted); }
.lesson-check.open .lesson-check-a { display: block; }
.lesson-check.open button { display: none; }

.code-off-hint {
  border: 1px dashed var(--border); border-radius: 10px; padding: .6rem .9rem;
  margin: 1.2rem 0 .6rem; font-size: .84rem; color: var(--text-muted);
}
.code-off-hint button, .code-cta {
  font: inherit; font-size: .8rem; font-weight: 600; cursor: pointer;
  border: 1px solid var(--accent); background: var(--accent-soft); color: var(--accent);
  border-radius: 6px; padding: .22rem .65rem;
}
.code-cta { font-size: .92rem; padding: .45rem 1rem; }
.code-path { counter-reset: lp; }
.code-path li { margin-bottom: .45rem; }
.code-path .lesson-num { margin-right: .4rem; }

@media (max-width: 600px) {
  .topbar-ids { display: none; }
  .tabs { margin-left: .4rem; }
  .tabs a { padding: .3rem .45rem; font-size: .78rem; }
}

@media (max-width: 900px) {
  .lesson-body { grid-template-columns: 1fr; }
  .lesson-steps { border-right: none; border-bottom: 1px solid var(--border-soft); }
  .lesson-code pre { max-height: 26rem; }
}