/* =========================================================================
   Ghost Agent — documentation theme
   A calm, dark, documentation-first design. Typography-led hierarchy,
   refined spacing, subtle depth. Every existing class name from the
   generated HTML is preserved; styles are refined, not renamed.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Surface palette — flat navy softened with a trace of warmth. */
  --bg:         #0b0d12;
  --bg-soft:    #10141c;
  --bg-card:    #161b26;
  --bg-hover:   #1c2230;
  --border:     #242b3c;
  --border-soft:#1c2230;

  /* Text */
  --fg:         #e8ecf4;
  --fg-muted:   #b4bccc;
  --fg-dim:     #7d8699;
  --fg-faint:   #535c6e;

  /* Accents — a narrower, more editorial set. */
  --accent:     #8ab4ff;
  --accent-2:   #c0a7ff;
  --accent-soft:rgba(138,180,255,0.12);
  --good:       #6fd4a4;
  --warn:       #f0b96a;
  --bad:        #f07070;

  /* Code */
  --code-bg:    #0a0d13;
  --code-fg:    #d9e2f5;

  /* Type */
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Motion */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  font-feature-settings: 'cv11', 'ss01', 'ss03', 'cv02';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at -10% -10%, rgba(138,180,255,0.04), transparent 60%),
    radial-gradient(1000px 500px at 110% 10%, rgba(192,167,255,0.035), transparent 55%),
    var(--bg);
  background-attachment: fixed;
}

::selection { background: rgba(138,180,255,0.28); color: #fff; }

/* Custom scrollbars (webkit) — thin, tonal, fades out. */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.06);
  border-radius: 10px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.12); background-clip: padding-box; }

/* =========================================================================
   Sidebar
   ========================================================================= */

aside.sidebar {
  background: linear-gradient(180deg, rgba(255,255,255,0.015), transparent 40%), var(--bg-soft);
  border-right: 1px solid var(--border-soft);
  padding: 1.5rem 0.9rem 2.5rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  scrollbar-gutter: stable;
}

aside.sidebar h1 {
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0.2rem 0.6rem 1.4rem;
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

/* Little "ghost dot" mark before the product name. */
aside.sidebar h1::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #c0d4ff 0%, var(--accent) 55%, #4d6fb3 100%);
  box-shadow:
    0 0 0 2px rgba(138,180,255,0.08),
    0 0 12px rgba(138,180,255,0.5);
  flex-shrink: 0;
}

aside.sidebar nav h3 {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-faint);
  margin: 1.5rem 0.6rem 0.4rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border-soft);
}
aside.sidebar nav h3:first-of-type { border-top: none; padding-top: 0; margin-top: 0.2rem; }

aside.sidebar nav a {
  display: block;
  color: var(--fg-muted);
  text-decoration: none;
  padding: 0.32rem 0.6rem;
  margin: 1px 0;
  border-radius: 5px;
  font-size: 0.88rem;
  font-weight: 400;
  letter-spacing: -0.005em;
  position: relative;
  transition: background 0.12s var(--ease), color 0.12s var(--ease);
}
aside.sidebar nav a:hover {
  background: var(--bg-hover);
  color: var(--fg);
}
aside.sidebar nav a.current {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}
aside.sidebar nav a.current::before {
  content: "";
  position: absolute;
  left: -0.9rem;
  top: 0.55rem;
  bottom: 0.55rem;
  width: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* =========================================================================
   Main column
   ========================================================================= */

main {
  padding: 3rem 3.5rem 4rem;
  max-width: 1040px;
  min-width: 0;          /* prevents grid overflow on wide pre blocks */
}

main h1, main h2, main h3, main h4 {
  scroll-margin-top: 1.5rem;
  font-family: var(--sans);
}

main h1 {
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.2;
  margin: 0 0 0.5rem;
  color: var(--fg);
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

main h2 {
  margin-top: 2.8rem;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.012em;
  color: var(--fg);
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border-soft);
}

main h3 {
  color: var(--accent);
  margin-top: 1.9rem;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.005em;
}

main h4 {
  color: var(--fg);
  margin-top: 1.3rem;
  font-size: 0.95rem;
  font-weight: 600;
}

p, li { color: var(--fg-muted); }
main p { margin: 0.6rem 0 0.9rem; }

strong { color: var(--fg); font-weight: 600; }
em { color: var(--fg); }

a {
  color: var(--accent);
  text-decoration: none;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 0.12s var(--ease);
}
main a { border-bottom: 1px solid rgba(138,180,255,0.25); padding-bottom: 1px; }
main a:hover { color: #b8cfff; border-bottom-color: rgba(138,180,255,0.65); }

ul, ol { padding-left: 1.3rem; }
li { margin: 0.25rem 0; }
li::marker { color: var(--fg-faint); }

hr {
  border: 0;
  border-top: 1px solid var(--border-soft);
  margin: 2.2rem 0;
}

.subtitle {
  color: var(--fg-dim);
  font-size: 1.02rem;
  line-height: 1.55;
  font-weight: 400;
  margin: 0 0 1.8rem;
  max-width: 72ch;
}

/* =========================================================================
   Code
   ========================================================================= */

code {
  font-family: var(--mono);
  background: var(--code-bg);
  border: 1px solid var(--border-soft);
  padding: 0.08em 0.38em;
  border-radius: 4px;
  font-size: 0.84em;
  font-weight: 500;
  color: var(--code-fg);
  word-break: break-word;
}

main a code { color: inherit; }

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.55;
  position: relative;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.02),
    0 1px 2px rgba(0,0,0,0.2);
}
pre::before {
  /* window dots — ambient, not decorative-only. */
  content: "";
  position: absolute;
  top: 0.75rem;
  left: 1rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.10);
  box-shadow:
    14px 0 0 rgba(255,255,255,0.07),
    28px 0 0 rgba(255,255,255,0.05);
}
pre code {
  background: transparent;
  border: 0;
  padding: 1.25rem 0 0;
  display: block;
  color: var(--code-fg);
  font-size: inherit;
}

kbd {
  font-family: var(--mono);
  font-size: 0.78em;
  padding: 0.1em 0.45em;
  border-radius: 4px;
  background: linear-gradient(180deg, #1e2434, #161b26);
  color: var(--fg);
  border: 1px solid var(--border);
  box-shadow: 0 1px 0 rgba(0,0,0,0.3), inset 0 -1px 0 rgba(255,255,255,0.04);
}

/* =========================================================================
   Tables
   ========================================================================= */

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.1rem 0 1.5rem;
  font-size: 0.88rem;
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  overflow: hidden;
}
th, td {
  border-bottom: 1px solid var(--border-soft);
  padding: 0.6rem 0.85rem;
  text-align: left;
  vertical-align: top;
}
th {
  background: rgba(255,255,255,0.02);
  color: var(--fg);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border);
}
tbody tr:last-child td { border-bottom: 0; }
tbody tr { transition: background 0.12s var(--ease); }
tbody tr:hover td { background: rgba(138,180,255,0.025); }
td code { font-size: 0.82em; white-space: nowrap; }

/* =========================================================================
   Cards
   ========================================================================= */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 0.9rem;
  margin: 1.4rem 0 2rem;
}
.card {
  position: relative;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.022), rgba(255,255,255,0.005)),
    var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.05rem 1.1rem 1rem;
  text-decoration: none;
  color: var(--fg);
  display: block;
  transition: border-color 0.15s var(--ease), transform 0.15s var(--ease), box-shadow 0.15s var(--ease);
  overflow: hidden;
}
.card::after {
  /* subtle top highlight — a touch of depth, not a glare. */
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.08), transparent);
  opacity: 0.6;
}
.card:hover {
  border-color: rgba(138,180,255,0.45);
  transform: translateY(-2px);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.03) inset,
    0 10px 24px -12px rgba(0,0,0,0.6),
    0 0 0 1px rgba(138,180,255,0.08);
}
.card h3 {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.005em;
}
.card p { margin: 0; color: var(--fg-dim); font-size: 0.85rem; line-height: 1.5; }
main .card { border-bottom: 1px solid var(--border); }  /* cancel main a border */
.card:hover p { color: var(--fg-muted); }

/* =========================================================================
   Badges & callouts
   ========================================================================= */

.badge {
  display: inline-block;
  padding: 0.12rem 0.55rem;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 500;
  background: rgba(138,180,255,0.08);
  color: var(--accent);
  border: 1px solid rgba(138,180,255,0.22);
  margin-right: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  vertical-align: middle;
}
.badge.good { color: var(--good); border-color: rgba(111,212,164,0.28); background: rgba(111,212,164,0.07); }
.badge.warn { color: var(--warn); border-color: rgba(240,185,106,0.28); background: rgba(240,185,106,0.07); }
.badge.bad  { color: var(--bad);  border-color: rgba(240,112,112,0.28); background: rgba(240,112,112,0.07); }

.note {
  border-left: 3px solid var(--accent);
  background:
    linear-gradient(90deg, rgba(138,180,255,0.04), transparent 60%),
    var(--bg-card);
  padding: 0.85rem 1.1rem;
  margin: 1.2rem 0;
  border-radius: 0 6px 6px 0;
  font-size: 0.92rem;
  color: var(--fg-muted);
}
.note strong { color: var(--accent); }
.note.warn { border-left-color: var(--warn); background: linear-gradient(90deg, rgba(240,185,106,0.05), transparent 60%), var(--bg-card); }
.note.warn strong { color: var(--warn); }
.note.bad  { border-left-color: var(--bad);  background: linear-gradient(90deg, rgba(240,112,112,0.05), transparent 60%), var(--bg-card); }
.note.bad strong { color: var(--bad); }

/* =========================================================================
   Hero block (index page)
   ========================================================================= */

.hero {
  margin: 0 0 2.2rem;
  padding: 2rem 2rem 1.8rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background:
    radial-gradient(800px 300px at 100% 0%, rgba(192,167,255,0.09), transparent 60%),
    radial-gradient(700px 300px at 0% 100%, rgba(138,180,255,0.08), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,0.02), transparent 70%),
    var(--bg-card);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.04),
    0 24px 60px -40px rgba(0,0,0,0.9);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.018) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.7;
}
.hero > * { position: relative; }
.hero h1 {
  border-bottom: 0;
  padding-bottom: 0;
  margin: 0 0 0.6rem;
  font-size: 2.3rem;
  letter-spacing: -0.025em;
}
.hero .subtitle { margin-bottom: 1rem; font-size: 1.05rem; color: var(--fg-muted); }
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.2rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 0.9rem;
}
.eyebrow::before {
  content: "";
  width: 20px; height: 1px;
  background: var(--accent);
  display: inline-block;
}

/* =========================================================================
   Diagrams (kept from previous theme — refined edges only)
   ========================================================================= */

.diagram {
  position: relative;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(138,180,255,0.07) 0%, transparent 55%),
    radial-gradient(ellipse at 80% 100%, rgba(192,167,255,0.05) 0%, transparent 55%),
    linear-gradient(180deg, #0f1522 0%, #090c13 100%);
  border: 1px solid rgba(138,180,255,0.16);
  border-radius: 14px;
  padding: 2rem 1.8rem 1.4rem;
  margin: 2rem 0;
  overflow-x: auto;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.04),
    inset 0 0 0 1px rgba(255,255,255,0.02),
    0 24px 60px -30px rgba(0,0,0,0.9),
    0 6px 20px -10px rgba(0,0,0,0.6);
}
.diagram::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 14px;
  background: linear-gradient(135deg,
    rgba(138,180,255,0.05) 0%,
    transparent 30%,
    transparent 70%,
    rgba(192,167,255,0.04) 100%);
  pointer-events: none;
  z-index: 0;
}
.diagram > svg {
  position: relative;
  z-index: 1;
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
  filter: drop-shadow(0 6px 14px rgba(0, 0, 0, 0.35));
}
.diagram svg text {
  font-family: var(--sans);
  font-weight: 500;
  letter-spacing: 0.015em;
  -webkit-font-smoothing: antialiased;
}
.diagram svg text[font-weight="700"] {
  font-weight: 700;
  letter-spacing: 0.16em;
  font-size: 11px;
  opacity: 0.9;
}
.diagram svg rect { stroke-width: 1; }
.diagram svg rect[fill="#131822"] { fill: transparent; }
.diagram svg rect[fill="#1a2030"] {
  fill: rgba(255, 255, 255, 0.028);
  stroke: rgba(255, 255, 255, 0.08);
}
.diagram svg rect[fill="#0c0f14"] { fill: rgba(255, 255, 255, 0.05); }
.diagram svg line {
  stroke-width: 1.25;
  opacity: 0.78;
  stroke-linecap: round;
}
.diagram svg path { stroke-linejoin: round; stroke-linecap: round; }
.diagram svg marker path { fill: rgba(138,180,255,0.85); }
.diagram svg rect[stroke="#7aa7ff"] { stroke: rgba(138,180,255,0.75); }
.diagram svg rect[stroke="#b894ff"] { stroke: rgba(192,167,255,0.72); }
.diagram svg rect[stroke="#5dd39e"] { stroke: rgba(111,212,164,0.72); }
.diagram svg rect[stroke="#ffb454"] { stroke: rgba(240,185,106,0.72); }
.diagram svg rect[stroke="#ff6e6e"] { stroke: rgba(240,112,112,0.72); }
.diagram svg rect[stroke="#2a3245"] { stroke: rgba(255, 255, 255, 0.09); }

.caption {
  position: relative;
  z-index: 1;
  color: var(--fg-dim);
  text-align: center;
  font-size: 0.8rem;
  margin-top: 0.9rem;
  letter-spacing: 0.04em;
  font-style: italic;
  opacity: 0.75;
}

/* =========================================================================
   Footer & misc
   ========================================================================= */

footer {
  margin-top: 4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border-soft);
  color: var(--fg-dim);
  font-size: 0.82rem;
  line-height: 1.6;
}
footer a { color: var(--fg-muted); border-bottom: 0; }
footer a:hover { color: var(--accent); }

.kv {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 0.4rem 1rem;
  margin: 1rem 0;
}
.kv dt { color: var(--fg-dim); font-family: var(--mono); font-size: 0.82rem; }
.kv dd { margin: 0; color: var(--fg-muted); }

/* Focus ring for keyboard nav. */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* =========================================================================
   Responsive
   ========================================================================= */

@media (max-width: 1024px) {
  body { grid-template-columns: 240px 1fr; }
  main { padding: 2.2rem 2rem 3rem; }
}

@media (max-width: 760px) {
  body { grid-template-columns: 1fr; }
  aside.sidebar {
    position: static;
    height: auto;
    padding: 1rem 1rem 1.4rem;
    border-right: 0;
    border-bottom: 1px solid var(--border-soft);
  }
  aside.sidebar nav { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 0.5rem; }
  aside.sidebar nav h3 { grid-column: 1 / -1; }
  main { padding: 1.6rem 1.2rem 2.5rem; }
  main h1 { font-size: 1.75rem; }
  .hero { padding: 1.4rem 1.2rem; }
  .hero h1 { font-size: 1.85rem; }
}

/* =========================================================================
   Print
   ========================================================================= */

@media print {
  body { grid-template-columns: 1fr; background: #fff; color: #111; }
  aside.sidebar { display: none; }
  main { padding: 0; max-width: none; }
  .card, .note, .diagram, pre { break-inside: avoid; }
  a { color: inherit; text-decoration: none; border-bottom: 0; }
  pre, code { background: #f5f5f7 !important; color: #111 !important; border-color: #ddd !important; }
}