/* =============================================================
   @cyanmycelium/mcp-broker, site styles
   Same charte as mcp-core, blue accent instead of green-cyan.
   ============================================================= */

:root {
  /* Surfaces */
  --bg:           #0b0f14;
  --bg-elev-1:    #11161d;
  --bg-elev-2:    #161c25;
  --bg-inline:    #1a212c;
  --rule:         #1f2731;
  --rule-strong:  #2a3340;

  /* Foreground */
  --fg:           #e6edf3;
  --fg-muted:     #9aa7b5;
  --fg-dim:       #6b7785;

  /* Accents (blue) */
  --blue:         #3b82f6;
  --blue-dim:     #2563eb;
  --blue-bright:  #60a5fa;
  --blue-deep:    #001a3d;
  --blue-fog:     rgba(59, 130, 246, 0.10);
  --blue-fog-2:   rgba(59, 130, 246, 0.18);
  --lime:         #b8e060;

  /* Syntax (Tokyo-Night-ish, tuned to the blue accent) */
  --syn-fg:       #c9d3df;
  --syn-comment:  #5c6776;
  --syn-keyword:  #c792ea;
  --syn-type:     #82d8ff;
  --syn-string:   #b8e060;
  --syn-number:   #ffb86b;
  --syn-fn:       #3b82f6;
  --syn-prop:     #e6edf3;
  --syn-punct:    #6b7785;
  --syn-builtin:  #f78c6c;
  --syn-decorator:#ffcb6b;

  /* Type */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Menlo, Consolas, monospace;

  /* Layout */
  --col: 860px;
  --gutter: 32px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv11', 'ss01', 'ss03';
}

::selection { background: var(--blue-fog-2); color: var(--fg); }

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------------- Layout shell ---------------- */

.shell {
  max-width: var(--col);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(11, 15, 20, 0.72);
  border-bottom: 1px solid var(--rule);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg);
  letter-spacing: -0.01em;
}
.brand-mark {
  width: 24px;
  height: 24px;
  display: inline-block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}
.topbar-links {
  display: flex;
  gap: 22px;
  font-size: 13px;
}
.topbar-links a { color: var(--fg-muted); }
.topbar-links a:hover { color: var(--fg); text-decoration: none; }

/* ---------------- Hero ---------------- */

.hero {
  padding: 96px 0 72px;
  border-bottom: 1px solid var(--rule);
}
.hero-mark {
  margin: 0 0 24px;
}
.hero-mark img {
  width: 96px;
  height: 96px;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--blue);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 12px var(--blue);
}
h1.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.5vw, 44px);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  line-height: 1.15;
  color: var(--fg);
}
h1.hero-title .at  { color: var(--blue); }
h1.hero-title .sl  { color: var(--fg-dim); }

.hero-sub {
  font-size: 20px;
  line-height: 1.5;
  color: var(--fg-muted);
  max-width: 620px;
  margin: 0 0 28px;
  text-wrap: pretty;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 36px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 24px;
  padding: 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  border-radius: 4px;
  background: var(--bg-elev-1);
  border: 1px solid var(--rule);
  color: var(--fg-muted);
}
.badge .k { color: var(--fg-dim); }
.badge .v { color: var(--fg); }
.badge.accent .v { color: var(--blue); }

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 44px;
  padding: 0 18px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 120ms, border-color 120ms, color 120ms, transform 120ms;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--blue);
  color: #ffffff;
  border-color: var(--blue);
}
.btn-primary:hover { background: var(--blue-bright); border-color: var(--blue-bright); color: var(--blue-deep); }
.btn-primary .cmd-dollar { color: #ffffff; opacity: 0.7; }
.btn-primary .copy-state { color: #ffffff; opacity: 0.7; font-size: 11px; }
.btn-primary:hover .cmd-dollar,
.btn-primary:hover .copy-state { color: var(--blue-deep); opacity: 0.7; }

.btn-secondary {
  background: transparent;
  color: var(--fg);
  border-color: var(--rule-strong);
}
.btn-secondary:hover { border-color: var(--fg-muted); background: var(--bg-elev-1); }
.btn-secondary svg { opacity: 0.8; }

/* ---------------- Sections ---------------- */

section {
  padding: 72px 0;
  border-bottom: 1px solid var(--rule);
}
section:last-of-type { border-bottom: none; }

.section-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--fg-dim);
  text-transform: uppercase;
  margin-bottom: 14px;
}
h2 {
  font-family: var(--font-sans);
  font-size: 28px;
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  color: var(--fg);
  text-wrap: balance;
}
h3 {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  margin: 36px 0 12px;
  color: var(--fg);
  letter-spacing: -0.01em;
}
h3 .h3-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--blue);
  margin-right: 10px;
  font-weight: 400;
}

p.intro {
  font-size: 17px;
  color: var(--fg-muted);
  max-width: 720px;
  margin: 0 0 24px;
  line-height: 1.6;
  text-wrap: pretty;
}
p {
  color: var(--fg-muted);
  margin: 0 0 16px;
}
p.caption {
  font-size: 14px;
  color: var(--fg-dim);
  margin: 12px 0 0;
}
p strong { color: var(--fg); font-weight: 600; }

/* Inline code */
code.inline,
p code, li code, td code, th code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--blue);
  background: var(--bg-inline);
  border: 1px solid var(--rule);
  padding: 1px 6px;
  border-radius: 4px;
  white-space: nowrap;
}
td code, th code { white-space: normal; }

/* ---------------- Why list ---------------- */

ol.why {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  counter-reset: why;
  display: grid;
  gap: 18px;
}
ol.why li {
  counter-increment: why;
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 16px;
  align-items: start;
}
ol.why li .why-icon {
  width: 32px;
  height: 32px;
  border: 1px solid var(--rule-strong);
  border-radius: 6px;
  display: grid;
  place-items: center;
  color: var(--blue);
  background: var(--bg-elev-1);
  flex-shrink: 0;
}
ol.why li .why-body {
  color: var(--fg-muted);
  line-height: 1.55;
}
ol.why li .why-body b { color: var(--fg); font-weight: 500; }

.conclusion {
  margin-top: 28px;
  padding: 18px 20px;
  background: var(--blue-fog);
  border-left: 2px solid var(--blue);
  border-radius: 0 6px 6px 0;
  color: var(--fg);
  font-size: 15px;
  line-height: 1.6;
}
.conclusion code { background: rgba(0,0,0,0.25); }

/* ---------------- Layer cards (architecture roles) ---------------- */

.stack {
  margin: 32px 0 40px;
  display: grid;
  gap: 0;
  position: relative;
}
.stack-layer {
  background: var(--bg-elev-1);
  border: 1px solid var(--rule-strong);
  border-radius: 8px;
  padding: 18px 22px;
  position: relative;
  transition: border-color 160ms, background 160ms;
}
.stack-layer:hover {
  border-color: var(--blue-dim);
  background: var(--bg-elev-2);
}
.stack-layer + .stack-arrow {
  height: 28px;
  display: grid;
  place-items: center;
  color: var(--fg-dim);
}
.stack-layer-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 6px;
}
.stack-layer-name {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--blue);
  font-weight: 500;
}
.stack-layer-idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-dim);
}
.stack-layer-body {
  color: var(--fg-muted);
  font-size: 15px;
  line-height: 1.5;
}

/* ---------------- Tables ---------------- */

.table-wrap {
  margin: 28px 0;
  border: 1px solid var(--rule);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-elev-1);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
thead th {
  background: var(--bg-elev-2);
  color: var(--fg);
  font-weight: 600;
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--rule-strong);
}
tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--rule);
  color: var(--fg-muted);
  vertical-align: top;
  line-height: 1.5;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: rgba(255,255,255,0.015); }

th.col-this, td.col-this {
  background: var(--blue-fog);
  color: var(--fg);
}
td.col-this { font-weight: 500; }
td.col-this code { background: rgba(0,0,0,0.3); color: var(--blue); border-color: rgba(59, 130, 246, 0.25); }
th.col-this { color: var(--blue); }

td.no { color: var(--fg-dim); font-family: var(--font-mono); font-size: 13px; }

/* ---------------- Code blocks ---------------- */

.code-wrap {
  margin: 20px 0 24px;
  background: #0a0e13;
  border: 1px solid var(--rule);
  border-radius: 8px;
  overflow: hidden;
  position: relative;
}
.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 14px 9px 16px;
  background: var(--bg-elev-1);
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-dim);
  letter-spacing: 0.04em;
}
.code-head .lang { color: var(--blue); text-transform: uppercase; letter-spacing: 0.16em; }
.code-head .copy-btn {
  background: transparent;
  border: 1px solid var(--rule-strong);
  color: var(--fg-muted);
  border-radius: 4px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  cursor: pointer;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: all 120ms;
}
.code-head .copy-btn:hover { color: var(--blue); border-color: var(--blue-dim); }
.code-head .copy-btn.copied { color: var(--blue); border-color: var(--blue); }

pre {
  margin: 0;
  padding: 18px 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.65;
  color: var(--syn-fg);
  tab-size: 2;
}
pre.scroll-y { max-height: 540px; overflow-y: auto; }
pre code { display: block; padding: 0 18px; min-width: max-content; }

.tk-c   { color: var(--syn-comment); font-style: italic; }
.tk-k   { color: var(--syn-keyword); }
.tk-t   { color: var(--syn-type); }
.tk-s   { color: var(--syn-string); }
.tk-n   { color: var(--syn-number); }
.tk-f   { color: var(--syn-fn); }
.tk-p   { color: var(--syn-prop); }
.tk-pu  { color: var(--syn-punct); }
.tk-b   { color: var(--syn-builtin); }
.tk-d   { color: var(--syn-decorator); }
.tk-step{ color: var(--blue); font-weight: 600; }

/* ---------------- Footer ---------------- */

footer {
  padding: 48px 0 64px;
  border-top: 1px solid var(--rule);
  color: var(--fg-dim);
  font-size: 13px;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
  align-items: baseline;
}
.footer-links {
  display: flex;
  gap: 22px;
  font-family: var(--font-mono);
}
.footer-links a { color: var(--fg-muted); }

/* ---------------- Toast (copy) ---------------- */

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--blue);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 10px 16px;
  border-radius: 6px;
  font-weight: 600;
  opacity: 0;
  transition: opacity 160ms, transform 160ms;
  pointer-events: none;
  z-index: 50;
  box-shadow: 0 8px 32px rgba(59, 130, 246, 0.3);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------------- Responsive ---------------- */

@media (max-width: 640px) {
  :root { --gutter: 20px; }
  .hero { padding: 64px 0 48px; }
  .hero-mark img { width: 72px; height: 72px; }
  section { padding: 48px 0; }
  h1.hero-title { font-size: 28px; }
  .hero-sub { font-size: 17px; }
  h2 { font-size: 22px; }
  .btn { width: 100%; justify-content: center; }
  .table-wrap { font-size: 13px; }
  thead th, tbody td { padding: 10px 12px; }
  .topbar-links { gap: 14px; }
}