/* ZChat Static Page Stylesheet — High-Performance Dark Theme (Zero-JS Fallback) */
:root {
  --bg-primary: #07090e;
  --bg-secondary: #0d111a;
  --bg-surface: #131926;
  --text-main: #f0f4fc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --border-color: #1e293b;
  --accent-emerald: #10b981;
  --accent-cyan: #06b6d4;
  --accent-sky: #38bdf8;
  --accent-amber: #f59e0b;
}

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

html, body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.65;
  color-scheme: dark;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-emerald);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover {
  color: #34d399;
  text-decoration: underline;
}

/* Header & Navigation */
.site-header {
  border-bottom: 1px solid var(--border-color);
  background: rgba(7, 9, 14, 0.92);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: #ffffff;
  text-decoration: none !important;
}
.brand-logo {
  width: 28px;
  height: 28px;
}
.brand-tag {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  font-family: 'JetBrains Mono', monospace;
  border: 1px solid rgba(16, 185, 129, 0.3);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  font-size: 0.9rem;
  flex-wrap: wrap;
}
.nav-link {
  color: var(--text-muted);
  text-decoration: none;
}
.nav-link:hover, .nav-link.active {
  color: #ffffff;
  text-decoration: none;
}
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: linear-gradient(135deg, #059669 0%, #0d9488 100%);
  color: #ffffff !important;
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: 1px solid #10b981;
  text-decoration: none !important;
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.25);
}
.cta-button:hover {
  background: linear-gradient(135deg, #10b981 0%, #14b8a6 100%);
}

/* Breadcrumbs */
.breadcrumbs {
  max-width: 900px;
  margin: 1.25rem auto 0;
  padding: 0 1.25rem;
  font-size: 0.825rem;
  color: var(--text-dim);
}
.breadcrumbs ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.breadcrumbs li::after {
  content: "›";
  margin-left: 0.4rem;
  color: var(--text-dim);
}
.breadcrumbs li:last-child::after {
  content: "";
}
.breadcrumbs a {
  color: var(--text-muted);
}
.breadcrumbs a:hover {
  color: var(--accent-emerald);
}

/* Main Content Container */
.content-wrapper {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

/* Page Hero */
.page-hero {
  margin-bottom: 2.5rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border-color);
}
h1 {
  font-size: 2.15rem;
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 0.85rem;
  color: #ffffff;
  letter-spacing: -0.02em;
}
.page-lead {
  font-size: 1.125rem;
  color: #cbd5e1;
  line-height: 1.6;
  margin: 0 0 1rem;
}
.page-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  font-size: 0.825rem;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
}

/* Typography & Headings */
h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: #38bdf8;
  margin: 2.25rem 0 0.85rem;
  letter-spacing: -0.01em;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(30, 41, 59, 0.6);
}
h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: #a7f3d0;
  margin: 1.5rem 0 0.5rem;
}
p {
  margin: 0 0 1.25rem;
  color: #cbd5e1;
}
ul, ol {
  margin: 0 0 1.25rem;
  padding-left: 1.5rem;
  color: #cbd5e1;
}
li {
  margin-bottom: 0.45rem;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  vertical-align: middle;
}
.badge-live {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
}
.badge-testing {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.4);
}
.badge-planned {
  background: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.4);
}

/* Callouts */
.callout {
  padding: 1rem 1.25rem;
  border-radius: 8px;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}
.callout-info {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-left: 4px solid var(--accent-emerald);
}
.callout-warning {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-left: 4px solid var(--accent-amber);
}
.callout-danger {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-left: 4px solid #ef4444;
}
.callout-title {
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: #ffffff;
}

/* Code & Pre */
code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875em;
  background: #0f172a;
  border: 1px solid #1e293b;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  color: #38bdf8;
  word-break: break-all;
}
pre {
  background: #0b0f19;
  border: 1px solid #1e293b;
  border-radius: 8px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  color: #cbd5e1;
}

/* Tables */
.table-container {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}
th {
  background: #0d131f;
  color: #38bdf8;
  font-weight: 600;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border-color);
}
td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid rgba(30, 41, 59, 0.6);
  color: #cbd5e1;
}
tr:last-child td {
  border-bottom: none;
}
tr:nth-child(even) td {
  background: rgba(13, 17, 26, 0.5);
}

/* Cards & Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
}
.card-title {
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: #05070a;
  padding: 3rem 1.25rem 2rem;
  font-size: 0.875rem;
  color: var(--text-dim);
}
.footer-container {
  max-width: 1100px;
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.footer-col-title {
  color: #ffffff;
  font-weight: 600;
  margin-bottom: 0.85rem;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 0.5rem;
}
.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}
.footer-links a:hover {
  color: var(--accent-emerald);
}
.footer-bottom {
  border-top: 1px solid rgba(30, 41, 59, 0.6);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  text-align: center;
  font-size: 0.8rem;
}
.footer-bottom-links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  justify-content: center;
}

@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.35rem; }
  .header-container { flex-wrap: wrap; }
  .nav-links { gap: 0.75rem; font-size: 0.825rem; }
}

/* 404 Not Found Page */
.not-found-wrapper {
  text-align: center;
  padding: 4.5rem 1.25rem 5rem;
}
.not-found-code {
  font-family: 'JetBrains Mono', monospace;
  color: #ef4444;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}
.not-found-title {
  font-size: 3rem;
  margin-bottom: 1rem;
}
.not-found-lead {
  max-width: 540px;
  margin: 0 auto 2rem;
  color: #94a3b8;
}
.not-found-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.not-found-link {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
}

/* Founder & Author Card Utilities */
.card-founder {
  margin-bottom: 1.5rem;
}
.founder-bio {
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
  color: #cbd5e1;
}
.founder-link {
  margin: 0;
  font-size: 0.85rem;
}

/* General Typography & Spacing Utilities */
.text-sm-p {
  font-size: 0.9rem;
}
.text-muted-p {
  font-size: 0.95rem;
  color: #cbd5e1;
}
.kbd-shortcut {
  background: #1e293b;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid #334155;
  font-family: monospace;
}
.notice-box {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 1rem;
  border-radius: 6px;
}
.border-accent-emerald { border-left: 4px solid #10b981; }
.border-accent-amber { border-left: 4px solid #f59e0b; }
.border-accent-rose { border-left: 4px solid #ef4444; }
.border-accent-indigo { border-left: 4px solid #6366f1; }
.text-cyan { color: #38bdf8; }
.text-emerald { color: #34d399; }
.text-white { color: #ffffff; }


/* Blog Listing & Article Styles */
.blog-card { margin-bottom: 1.5rem; }
.blog-meta { margin-bottom: 0.5rem; }
.blog-title { font-size: 1.35rem; margin: 0 0 0.5rem; border: none; padding: 0; }
.blog-title a { color: #ffffff; }
.blog-excerpt { font-size: 0.95rem; color: #cbd5e1; margin-bottom: 1rem; }
.blog-link { font-weight: 600; font-size: 0.9rem; }

/* Spacing & Content Utility Classes */
.m-0 { margin: 0; }
.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: 0.25rem; }
.mb-sm { margin-bottom: 0.5rem; }
.mb-md { margin-bottom: 0.75rem; }
.mb-lg { margin-bottom: 1rem; }
.mb-xl { margin-bottom: 1.5rem; }
.mb-2xl { margin-bottom: 2rem; }
.my-lg { margin: 1.5rem 0; }

.fs-sm { font-size: 0.9rem; }
.fs-xs { font-size: 0.85rem; }
.fs-lg { font-size: 1.1rem; }
.font-mono { font-family: 'JetBrains Mono', monospace; }

.text-slate-muted { color: #94a3b8; }
.list-indent { margin: 0; padding-left: 1.25rem; }