/* ===== Reset & Variables ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --kf-dark: #17102F;
  --kf-purple: #6844DF;
  --kf-purple-light: #8b6fe8;
  --kf-purple-subtle: #f0ecff;
  --kf-nav-link: #6256A3;
  --kf-text: #313131;
  --kf-text-muted: #6b7084;
  --kf-bg: #ffffff;
  --kf-white: #ffffff;
  --kf-border: #e2e4ec;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
  --sidebar-width: 260px;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--kf-text);
  background: var(--kf-bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--kf-purple); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--kf-purple-light); }

img { max-width: 100%; height: auto; }

/* ===== Header ===== */
.site-header {
  background: var(--kf-dark);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  position: sticky;
  top: 0;
  z-index: 200;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.75rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo img { display: block; }

.header-nav { display: flex; gap: 0.25rem; }

.nav-link {
  padding: 0.5rem 1rem;
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-link:hover { color: #fff; background: rgba(255,255,255,0.1); }
.nav-link.active { color: #fff; background: rgba(255,255,255,0.15); }

/* ===== Layout ===== */
.page-layout {
  display: flex;
  min-height: calc(100vh - 60px);
}

/* ===== Sidebar ===== */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--kf-white);
  border-right: 1px solid var(--kf-border);
  padding: 1.5rem 0;
  position: sticky;
  top: 53px;
  height: calc(100vh - 53px);
  overflow-y: auto;
}

.sidebar-toggle {
  display: none;
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 300;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: var(--kf-purple);
  color: white;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(104,68,223,0.4);
  align-items: center;
  justify-content: center;
}

.sidebar-heading {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--kf-text-muted);
  padding: 0 1.5rem;
  margin-bottom: 0.5rem;
}

.sidebar-link {
  display: block;
  padding: 0.45rem 1.5rem;
  font-size: 0.9rem;
  color: var(--kf-text);
  transition: all var(--transition);
}
.sidebar-link:hover {
  background: var(--kf-purple-subtle);
  color: var(--kf-purple);
}
.sidebar-link.active {
  background: var(--kf-purple-subtle);
  color: var(--kf-purple);
  font-weight: 600;
  border-right: 3px solid var(--kf-purple);
}

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  min-width: 0;
  padding: 2.5rem 3rem;
  max-width: 900px;
}

/* ===== Documentation Content ===== */
/* Applied to both .doc-content and .main-content for consistent styling */
.doc-content, .main-content {
  line-height: 1.7;
}

.doc-content h1, .main-content h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--kf-text);
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--kf-purple-subtle);
}

.doc-content h2, .main-content h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--kf-text);
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--kf-border);
}

.doc-content h3, .main-content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--kf-purple);
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

.doc-content h4, .main-content h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--kf-text-muted);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: 0.85rem;
}

.doc-content p, .main-content p {
  margin-bottom: 1em;
  line-height: 1.7;
}

.doc-content ul, .doc-content ol,
.main-content ul, .main-content ol {
  margin-bottom: 1.25em;
  padding-left: 1.5em;
}

.doc-content li, .main-content li {
  margin-bottom: 0.4em;
  line-height: 1.65;
}

.doc-content li::marker, .main-content li::marker {
  color: var(--kf-purple);
}

.doc-content a, .main-content a {
  font-weight: 500;
  color: var(--kf-purple);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}
.doc-content a:hover, .main-content a:hover {
  color: var(--kf-purple-light);
  border-bottom-color: var(--kf-purple-light);
}

.doc-content code, .main-content code {
  padding: 2px 7px;
  font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
  font-size: 0.85rem;
  color: var(--kf-purple);
  background: var(--kf-purple-subtle);
  border-radius: 5px;
  border: 1px solid rgba(104,68,223,0.1);
}

.doc-content pre, .main-content pre {
  padding: 1.25rem 1.5rem;
  margin: 0.5rem 0 1.5rem;
  font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
  font-size: 0.85rem;
  background: #1e1e2e;
  color: #cdd6f4;
  border-radius: var(--radius);
  overflow-x: auto;
  border: 1px solid #2a2a3e;
  line-height: 1.6;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.doc-content pre code, .main-content pre code {
  padding: 0;
  color: inherit;
  background: transparent;
  border: none;
  border-radius: 0;
  font-size: inherit;
}

.doc-content blockquote, .main-content blockquote {
  padding: 1rem 1.25rem;
  margin: 1em 0;
  color: var(--kf-text-muted);
  background: var(--kf-purple-subtle);
  border-left: 4px solid var(--kf-purple);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.doc-content blockquote > :first-child, .main-content blockquote > :first-child { margin-top: 0; }
.doc-content blockquote > :last-child, .main-content blockquote > :last-child { margin-bottom: 0; }

.doc-content strong, .main-content strong {
  color: var(--kf-text);
  font-weight: 600;
}

.doc-content table, .main-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0 1.5em;
  font-size: 0.925rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.doc-content table th, .main-content table th {
  font-weight: 600;
  background: var(--kf-purple-subtle);
  text-align: left;
  color: var(--kf-purple);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.doc-content table th, .doc-content table td,
.main-content table th, .main-content table td {
  padding: 0.65rem 1rem;
  border: 1px solid var(--kf-border);
}
.doc-content table tr:hover td, .main-content table tr:hover td {
  background: #fafbfe;
}

.doc-content hr, .main-content hr {
  height: 1px;
  margin: 2.5rem 0;
  background: var(--kf-border);
  border: 0;
}

.doc-content img, .main-content img {
  border-radius: var(--radius);
  border: 1px solid var(--kf-border);
  margin: 1rem 0;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

/* Note/warning style for bold paragraphs starting with Note */
.doc-content p > strong:first-child, .main-content p > strong:first-child {
  color: var(--kf-purple);
}

/* ===== Integration Detail ===== */
.integration-detail { max-width: 800px; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--kf-text-muted);
  margin-bottom: 1.5rem;
  transition: color var(--transition), gap var(--transition);
}
.back-link:hover { color: var(--kf-purple); gap: 0.5rem; }

.type-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: 10px;
  background: var(--kf-purple-subtle);
  color: var(--kf-purple);
  text-transform: capitalize;
}

.integration-description {
  font-size: 1.05rem;
  color: var(--kf-text-muted);
  line-height: 1.7;
}

.btn-action {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: #fff;
  background: var(--kf-text);
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition);
}
.btn-action:hover { background: #000; color: #fff; transform: translateY(-1px); }
.btn-action.btn-secondary { background: var(--kf-purple); }
.btn-action.btn-secondary:hover { background: var(--kf-purple-light); color: #fff; }

/* ===== Footer ===== */
.site-footer {
  padding: 1.5rem 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--kf-text-muted);
  border-top: 1px solid var(--kf-border);
}
.site-footer a { color: var(--kf-purple); font-weight: 500; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -280px;
    top: 53px;
    height: calc(100vh - 53px);
    width: 280px;
    z-index: 250;
    box-shadow: 4px 0 24px rgba(0,0,0,0.1);
    transition: left var(--transition);
  }
  .sidebar.open { left: 0; }
  .sidebar-toggle { display: flex; }
  .main-content { padding: 1.5rem 1.25rem; }
  .header-inner { padding: 0.75rem 1rem; }
  .header-logo img { width: 140px; }
  .doc-content h1 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
  .header-nav { display: none; }
}