/* Frames, Cogs & Ops — Technical Field Guide
   Built on the OpenTeams design system (ot-foundations.css). */

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--ot-navy-900);
  color: var(--ot-fg);
  font-family: var(--ot-font-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* atmospheric glow, fixed so it stays put while scrolling */
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 50% at 12% 8%, rgba(48,86,245,0.14) 0%, transparent 55%),
    radial-gradient(ellipse 60% 50% at 92% 100%, rgba(255,132,99,0.10) 0%, transparent 55%),
    var(--ot-navy-900);
}

/* ───────── concept color mapping (mirrors the brand gradient) ───────── */
:root {
  --c-frame: var(--ot-blue-400);
  --c-frame-soft: rgba(91,123,255,0.14);
  --c-frame-line: rgba(91,123,255,0.42);
  --c-cog: var(--ot-purple-500);
  --c-cog-soft: rgba(142,91,200,0.16);
  --c-cog-line: rgba(142,91,200,0.5);
  --c-op: var(--ot-coral-500);
  --c-op-soft: rgba(255,132,99,0.14);
  --c-op-line: rgba(255,132,99,0.45);
}

/* ───────── layout ───────── */
.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 32px; }
.col { max-width: 760px; margin-left: auto; margin-right: auto; }
.wide { max-width: 1040px; margin-left: auto; margin-right: auto; }

section { padding: 96px 0; position: relative; }
section + section { border-top: 1px solid var(--ot-border); }

/* ───────── nav (mirrors the site chapnav: transparent over the hero → frosted on scroll) ───────── */
.nav {
  position: sticky; top: 0; z-index: 50;
  height: 64px;
  display: flex; align-items: center;
  padding: 0 clamp(24px, 5vw, 80px);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--ot-duration) var(--ot-ease),
              border-color var(--ot-duration) var(--ot-ease),
              box-shadow var(--ot-duration) var(--ot-ease);
}
.nav.solid {
  background: rgba(6,17,46,0.72);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom-color: var(--ot-border);
  box-shadow: 0 1px 0 rgba(255,255,255,0.04);
}
.nav .wrap { width: 100%; max-width: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; flex-shrink: 0; }
.brand img { width: 30px; height: 30px; object-fit: contain; display: block; }
.brand b { font-family: var(--ot-font-display); font-weight: 600; font-size: 19px; color: #fff; letter-spacing: -0.02em; }
.brand b .t { color: inherit; }
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-links a {
  font-family: var(--ot-font-body); font-size: 13.5px; font-weight: 500; color: var(--ot-fg-muted);
  text-decoration: none; padding: 8px 13px; border-radius: var(--ot-radius-pill);
  position: relative; white-space: nowrap;
  transition: color var(--ot-duration-fast) var(--ot-ease), background var(--ot-duration-fast) var(--ot-ease);
}
.nav-links a:hover { color: #fff; background: rgba(255,255,255,0.06); }
.nav-links a.frame:hover { color: var(--c-frame); }
.nav-links a.cog:hover { color: var(--c-cog); }
.nav-links a.op:hover { color: var(--c-op); }
.nav-links a.active { color: var(--ot-blue-300); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 13px; right: 13px; bottom: 3px; height: 2px;
  background: var(--ot-blue-400); border-radius: 2px;
}
@media (max-width: 860px) { .nav-links { display: none; } }

.progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: var(--ot-gradient-brand-soft); z-index: 60;
  box-shadow: 0 0 12px rgba(91,123,255,0.5);
  transition: width 80ms linear;
}

/* primary CTA pill (mirrors the site's pill-primary) */
.xlink {
  display: inline-flex; align-items: center; gap: 8px; flex-shrink: 0;
  font-family: var(--ot-font-display); font-weight: 600; font-size: 14.5px; letter-spacing: -0.01em;
  color: #fff; text-decoration: none;
  background: var(--ot-blue-500);
  padding: 9px 18px; border-radius: var(--ot-radius-pill);
  border: none; box-shadow: var(--ot-shadow-button);
  transition: transform var(--ot-duration) var(--ot-ease),
              box-shadow var(--ot-duration) var(--ot-ease),
              background var(--ot-duration-fast) var(--ot-ease);
}
.xlink:hover { background: var(--ot-blue-600); transform: translateY(-2px); box-shadow: var(--ot-shadow-button-hover); }
.xlink .ar { color: #fff; }
@media (max-width: 980px) { .xlink { display: none; } }

/* ───────── type ───────── */
.eyebrow {
  font-family: var(--ot-font-body); font-weight: 600; font-size: 13px;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--ot-blue-300);
  display: inline-flex; align-items: center; gap: 8px;
}
.eyebrow::before { content: "—"; color: inherit; }
.eyebrow.f { color: var(--c-frame); }
.eyebrow.c { color: var(--c-cog); }
.eyebrow.o { color: var(--c-op); }

h1.disp {
  font-family: var(--ot-font-display); font-weight: 800;
  font-size: clamp(40px, 6.5vw, 84px); line-height: 1.0; letter-spacing: -0.025em;
  margin: 20px 0 0; text-wrap: balance;
}
h2.disp {
  font-family: var(--ot-font-display); font-weight: 800;
  font-size: clamp(32px, 4.6vw, 56px); line-height: 1.04; letter-spacing: -0.02em;
  margin: 14px 0 0; text-wrap: balance;
}
h3.disp {
  font-family: var(--ot-font-display); font-weight: 700;
  font-size: clamp(22px, 2.6vw, 30px); line-height: 1.15; letter-spacing: -0.01em;
  margin: 0; color: #fff;
}
h4.disp {
  font-family: var(--ot-font-display); font-weight: 700; font-size: 19px;
  line-height: 1.3; margin: 0; color: #fff;
}
.grad { background: var(--ot-gradient-brand); -webkit-background-clip: text; background-clip: text; color: transparent; -webkit-text-fill-color: transparent; }

p.lede { font-size: 21px; line-height: 1.55; color: var(--ot-fg-muted); margin: 22px 0 0; text-wrap: pretty; }
p { font-size: 17px; line-height: 1.65; color: var(--ot-fg-muted); text-wrap: pretty; }
.col p, .wide > p { margin: 18px 0; }
p strong, li strong { color: #fff; font-weight: 600; }
p em, li em { color: var(--ot-blue-200); font-style: italic; }
a.ilink { color: var(--ot-link); text-decoration: none; border-bottom: 1px solid rgba(91,123,255,0.4); }
a.ilink:hover { color: var(--ot-link-hover); }
code.inline {
  font-family: var(--ot-font-mono); font-size: 0.86em;
  background: rgba(255,255,255,0.07); border: 1px solid var(--ot-border);
  padding: 1px 6px; border-radius: 6px; color: #cdd6f4;
}
code.inline.f { color: var(--c-frame); background: var(--c-frame-soft); border-color: var(--c-frame-line); }
code.inline.c { color: #c7a6ec; background: var(--c-cog-soft); border-color: var(--c-cog-line); }
code.inline.o { color: var(--ot-coral-400); background: var(--c-op-soft); border-color: var(--c-op-line); }

ul.body, ol.body { color: var(--ot-fg-muted); font-size: 17px; line-height: 1.6; padding-left: 22px; }
ul.body li, ol.body li { margin: 9px 0; }
ul.body li::marker { color: var(--ot-blue-400); }

/* ───────── level marker ───────── */
.level {
  display: inline-flex; align-items: center; gap: 10px; margin: 0 0 8px;
  font-family: var(--ot-font-mono); font-size: 12px; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--ot-fg-subtle);
}
.level .num {
  display: inline-grid; place-items: center; width: 26px; height: 26px;
  border-radius: 50%; border: 1px solid var(--ot-border-strong);
  font-weight: 600; color: #fff;
}
.level.f .num { border-color: var(--c-frame-line); color: var(--c-frame); }
.level.c .num { border-color: var(--c-cog-line); color: #c7a6ec; }
.level.o .num { border-color: var(--c-op-line); color: var(--ot-coral-400); }
.level b { color: #fff; font-weight: 600; letter-spacing: 0.06em; }
.level-block { margin: 40px 0; }
.level-block h4.disp { margin-bottom: 8px; }

/* ───────── concept badge / section header ───────── */
.kicker { display: flex; align-items: center; gap: 14px; }
.glyph {
  width: 48px; height: 48px; border-radius: 14px; flex-shrink: 0;
  display: grid; place-items: center; font-family: var(--ot-font-mono);
  font-weight: 600; font-size: 22px; color: #fff;
  border: 1px solid var(--ot-border-strong);
}
.glyph.f { background: var(--c-frame-soft); border-color: var(--c-frame-line); color: var(--c-frame); }
.glyph.c { background: var(--c-cog-soft); border-color: var(--c-cog-line); color: #c7a6ec; }
.glyph.o { background: var(--c-op-soft); border-color: var(--c-op-line); color: var(--ot-coral-400); }

/* ───────── code blocks ───────── */
.code {
  background: #050b1f; border: 1px solid var(--ot-border-strong);
  border-radius: var(--ot-radius-lg); overflow: hidden; margin: 26px 0;
  box-shadow: 0 18px 50px rgba(0,0,0,0.4);
}
.code-head {
  display: flex; align-items: center; gap: 10px; padding: 11px 16px;
  background: rgba(255,255,255,0.03); border-bottom: 1px solid var(--ot-border);
  font-family: var(--ot-font-mono); font-size: 12px; color: var(--ot-fg-subtle);
}
.code-head .dot { width: 10px; height: 10px; border-radius: 50%; }
.code-head .fname { color: #cdd6f4; }
.code-head .tag {
  margin-left: auto; font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 3px 9px; border-radius: var(--ot-radius-pill);
  border: 1px solid var(--ot-border); color: var(--ot-fg-subtle);
}
.code-head .tag.f { color: var(--c-frame); border-color: var(--c-frame-line); }
.code-head .tag.c { color: #c7a6ec; border-color: var(--c-cog-line); }
.code-head .tag.o { color: var(--ot-coral-400); border-color: var(--c-op-line); }
.code pre {
  margin: 0; padding: 20px 22px; overflow-x: auto;
  font-family: var(--ot-font-mono); font-size: 13.5px; line-height: 1.7; color: #c9d1e8;
}
.code pre code { font-family: inherit; white-space: pre; }
.tok-c { color: #5e6b8f; font-style: italic; }
.tok-s { color: #ffb39a; }
.tok-k { color: #7da2ff; }
.tok-b { color: #c7a6ec; }
.tok-n { color: #ffc97a; }
.tok-f { color: #6ee0c8; }
.tok-self { color: #8a93b8; font-style: italic; }

/* ───────── callouts / anchors ───────── */
.anchor {
  border-radius: var(--ot-radius-lg); padding: 20px 22px; margin: 26px 0;
  background: rgba(255,255,255,0.025); border: 1px solid var(--ot-border);
}
.anchor .chip {
  display: inline-flex; align-items: center; gap: 7px; margin-bottom: 10px;
  font-family: var(--ot-font-mono); font-size: 11px; letter-spacing: 0.07em; text-transform: uppercase;
  padding: 4px 10px; border-radius: var(--ot-radius-pill); font-weight: 600;
}
.anchor p { margin: 0; font-size: 15.5px; line-height: 1.6; }
.anchor p + p { margin-top: 10px; }
.anchor--swe { background: rgba(48,86,245,0.07); border-color: rgba(91,123,255,0.28); }
.anchor--swe .chip { color: var(--ot-blue-300); background: rgba(48,86,245,0.16); }
.anchor--pm { background: rgba(255,132,99,0.06); border-color: rgba(255,132,99,0.26); }
.anchor--pm .chip { color: var(--ot-coral-400); background: rgba(255,132,99,0.14); }
.anchor--key { background: rgba(142,91,200,0.07); border-color: rgba(142,91,200,0.3); }
.anchor--key .chip { color: #c7a6ec; background: rgba(142,91,200,0.16); }

.two { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.two .anchor { margin: 0; }
@media (max-width: 720px) { .two { grid-template-columns: 1fr; } }

/* ───────── tables ───────── */
.tbl { width: 100%; border-collapse: collapse; margin: 26px 0; font-size: 15px; }
.tbl th, .tbl td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--ot-border); vertical-align: top; }
.tbl th { font-family: var(--ot-font-display); font-weight: 700; color: #fff; font-size: 13px; letter-spacing: 0.02em; }
.tbl td { color: var(--ot-fg-muted); line-height: 1.5; }
.tbl tr:hover td { background: rgba(255,255,255,0.02); }
.tbl td:first-child { color: #fff; font-weight: 600; }
.tbl code { font-family: var(--ot-font-mono); font-size: 12.5px; color: #9fd8ff; }
.tbl .pill { font-family: var(--ot-font-mono); font-size: 11px; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--ot-border-strong); }

/* ───────── diagrams ───────── */
.fig { margin: 32px 0; }
.fig-cap { font-size: 13px; color: var(--ot-fg-subtle); text-align: center; margin-top: 14px; font-style: italic; }

/* stack diagram */
.stack { display: flex; flex-direction: column; gap: 10px; max-width: 620px; margin: 0 auto; }
.stack .layer {
  display: grid; grid-template-columns: 120px 1fr; align-items: center; gap: 18px;
  padding: 16px 20px; border-radius: var(--ot-radius-md);
  border: 1px solid var(--ot-border); background: var(--ot-surface);
}
.stack .layer .lbl { font-family: var(--ot-font-display); font-weight: 700; font-size: 16px; }
.stack .layer .desc { font-size: 14px; color: var(--ot-fg-subtle); }
.stack .layer.model { border-color: var(--ot-border); }
.stack .layer.model .lbl { color: var(--ot-fg-subtle); }
.stack .layer.frame { border-color: var(--c-frame-line); background: linear-gradient(90deg, var(--c-frame-soft), transparent); }
.stack .layer.frame .lbl { color: var(--c-frame); }
.stack .layer.cog { border-color: var(--c-cog-line); background: linear-gradient(90deg, var(--c-cog-soft), transparent); }
.stack .layer.cog .lbl { color: #c7a6ec; }
.stack .layer.op { border-color: var(--c-op-line); background: linear-gradient(90deg, var(--c-op-soft), transparent); }
.stack .layer.op .lbl { color: var(--ot-coral-400); }
.stack .arrow { text-align: center; color: var(--ot-fg-subtle); font-size: 13px; font-family: var(--ot-font-mono); }

/* inheritance graph */
.tree { display: flex; flex-direction: column; align-items: center; gap: 0; }
.tree .node {
  position: relative; width: 100%; max-width: 480px; padding: 14px 18px;
  border-radius: var(--ot-radius-md); border: 1px solid var(--c-frame-line);
  background: var(--ot-surface); text-align: left;
}
.tree .node .nh { display: flex; align-items: baseline; gap: 10px; }
.tree .node .scope { font-family: var(--ot-font-mono); font-size: 11px; color: var(--c-frame); text-transform: uppercase; letter-spacing: 0.05em; }
.tree .node .name { font-family: var(--ot-font-display); font-weight: 700; font-size: 16px; color: #fff; }
.tree .node .adds { font-size: 13px; color: var(--ot-fg-subtle); margin-top: 4px; }
.tree .node .adds b { color: var(--ot-blue-200); font-weight: 500; }
.tree .conn { width: 2px; height: 26px; background: var(--c-frame-line); }
.tree .node.me { border-color: var(--c-op-line); background: linear-gradient(180deg, var(--c-op-soft), transparent); }
.tree .node.me .scope { color: var(--ot-coral-400); }
.tree .indent { font-size: 11px; color: var(--ot-fg-subtle); font-family: var(--ot-font-mono); margin-top: 6px; }

/* op orchestration flow */
.flow { display: flex; flex-direction: column; gap: 0; align-items: stretch; max-width: 560px; margin: 0 auto; }
.flow .step {
  display: flex; align-items: center; gap: 14px; padding: 14px 18px;
  border-radius: var(--ot-radius-md); border: 1px solid var(--ot-border); background: var(--ot-surface);
}
.flow .step .ic { width: 34px; height: 34px; border-radius: 9px; flex-shrink: 0; display: grid; place-items: center; font-family: var(--ot-font-mono); font-size: 13px; font-weight: 600; }
.flow .step.cog { border-color: var(--c-cog-line); }
.flow .step.cog .ic { background: var(--c-cog-soft); color: #c7a6ec; }
.flow .step.human { border-color: rgba(255,255,255,0.2); background: rgba(255,255,255,0.04); }
.flow .step.human .ic { background: rgba(255,255,255,0.1); color: #fff; }
.flow .step .t { font-weight: 600; color: #fff; font-size: 15px; }
.flow .step .s { font-size: 13px; color: var(--ot-fg-subtle); }
.flow .step .meta { margin-left: auto; font-family: var(--ot-font-mono); font-size: 11px; color: var(--ot-fg-subtle); }
.flow .par { display: flex; gap: 10px; }
.flow .par .step { flex: 1; }
.flow .down { text-align: center; color: var(--c-op); font-size: 16px; padding: 5px 0; }

/* ───────── context-assembly visualizer ───────── */
.viz {
  border: 1px solid var(--ot-border-strong); border-radius: var(--ot-radius-xl);
  background: rgba(5,11,31,0.7); overflow: hidden; margin: 32px 0;
}
.viz-top { padding: 18px 22px; border-bottom: 1px solid var(--ot-border); display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.viz-top .ttl { font-family: var(--ot-font-display); font-weight: 700; color: #fff; font-size: 16px; }
.viz-top .sub { font-size: 13px; color: var(--ot-fg-subtle); }
.viz-grid { display: grid; grid-template-columns: 300px 1fr; gap: 0; }
@media (max-width: 760px) { .viz-grid { grid-template-columns: 1fr; } }
.viz-controls { padding: 18px; border-right: 1px solid var(--ot-border); display: flex; flex-direction: column; gap: 10px; }
@media (max-width: 760px) { .viz-controls { border-right: none; border-bottom: 1px solid var(--ot-border); } }
.viz-controls .ctl-h { font-family: var(--ot-font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ot-fg-subtle); margin-bottom: 2px; }
.frame-toggle {
  display: flex; align-items: flex-start; gap: 11px; padding: 11px 13px; cursor: pointer;
  border-radius: var(--ot-radius-md); border: 1px solid var(--ot-border);
  background: var(--ot-surface); transition: all var(--ot-duration-fast) var(--ot-ease); user-select: none;
}
.frame-toggle:hover { border-color: var(--ot-border-strong); }
.frame-toggle .sw {
  width: 18px; height: 18px; border-radius: 5px; flex-shrink: 0; margin-top: 1px;
  border: 1.5px solid var(--ot-fg-subtle); display: grid; place-items: center;
  transition: all var(--ot-duration-fast) var(--ot-ease); position: relative;
}
.frame-toggle .sw::after { content: "✓"; font-size: 12px; color: #fff; opacity: 0; }
.frame-toggle.on .sw { opacity: 1; }
.frame-toggle.on .sw::after { opacity: 1; }
.frame-toggle .meta-t { font-weight: 600; color: #fff; font-size: 13.5px; }
.frame-toggle .meta-s { font-size: 11.5px; color: var(--ot-fg-subtle); margin-top: 2px; font-family: var(--ot-font-mono); }
.frame-toggle.locked { opacity: 0.85; cursor: not-allowed; }
.frame-toggle.locked .lk { margin-left: auto; font-size: 10px; color: var(--ot-fg-subtle); font-family: var(--ot-font-mono); }
.viz-output { padding: 0; min-height: 360px; display: flex; flex-direction: column; }
.viz-output .out-head { padding: 12px 18px; border-bottom: 1px solid var(--ot-border); display: flex; gap: 14px; align-items: center; font-family: var(--ot-font-mono); font-size: 11.5px; color: var(--ot-fg-subtle); }
.viz-output .out-head .stat b { color: #fff; }
.viz-prompt { padding: 16px 18px; overflow-y: auto; max-height: 460px; font-family: var(--ot-font-mono); font-size: 13px; line-height: 1.6; }
.pblock { margin: 0 0 14px; padding: 10px 13px; border-radius: 8px; border-left: 3px solid; background: rgba(255,255,255,0.02); animation: fadein 0.25s var(--ot-ease); }
@keyframes fadein { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.pblock .ph { font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 6px; opacity: 0.9; }
.pblock .pl { color: #b9c2dd; white-space: pre-wrap; }
.pblock .pl .ov { color: #ffc97a; }
.pblock.empty { border-left-color: var(--ot-border-strong); color: var(--ot-fg-subtle); font-style: italic; background: none; }
.legend { display: flex; gap: 16px; flex-wrap: wrap; padding: 12px 18px; border-top: 1px solid var(--ot-border); font-size: 11.5px; color: var(--ot-fg-subtle); }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }

/* ───────── misc ───────── */
.hr-note { font-size: 13px; color: var(--ot-fg-subtle); font-style: italic; }
.tldr { border: 1px dashed var(--ot-border-strong); border-radius: var(--ot-radius-lg); padding: 18px 22px; margin: 24px 0; background: rgba(255,255,255,0.015); }
.tldr .tl { font-family: var(--ot-font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ot-blue-300); margin-bottom: 8px; }
.tldr p { margin: 0; font-size: 16px; color: var(--ot-fg); }
footer { padding: 60px 0 80px; border-top: 1px solid var(--ot-border); color: var(--ot-fg-subtle); font-size: 14px; }
footer .wrap { display: flex; flex-direction: column; gap: 8px; }
.section-tag { font-family: var(--ot-font-mono); font-size: 12px; color: var(--ot-fg-subtle); letter-spacing: 0.05em; }