/* Modern Plain HTML Documentation & Demo Theme */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Canonical Design System Tokens */
  --mdc-font-family: var(--font-sans);
  --mdc-drawer-width: 340px;
  --mdc-fab-size: 44px;
  --mdc-color-bg: #0b0f19;
  --mdc-color-surface: #111827;
  --mdc-color-card: #1f2937;
  --mdc-color-border: #374151;
  --mdc-color-text-primary: #f9fafb;
  --mdc-color-text-secondary: #9ca3af;
  --mdc-color-accent: #6366f1;
  --mdc-color-accent-hover: #4f46e5;

  --color-bg: #0b0f19;
  --color-bg-subtle: #111827;
  --color-bg-card: #1f2937;
  --color-border: #374151;
  --color-text: #f9fafb;
  --color-text-muted: #9ca3af;
  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-accent: #6366f1;
  --color-accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --sidebar-width: 280px;
}

[data-theme='light'] {
  --mdc-color-bg: #ffffff;
  --mdc-color-surface: #f8fafc;
  --mdc-color-card: #ffffff;
  --mdc-color-border: #e2e8f0;
  --mdc-color-text-primary: #0f172a;
  --mdc-color-text-secondary: #64748b;
  --mdc-color-accent: #4f46e5;
  --mdc-color-accent-hover: #4338ca;

  --color-bg: #ffffff;
  --color-bg-subtle: #f8fafc;
  --color-bg-card: #ffffff;
  --color-border: #e2e8f0;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-accent: #4f46e5;
  --color-accent-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Global Announcement Banner */
.demo-site-banner {
  background: linear-gradient(90deg, #1e1b4b, #312e81, #1e293b);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  color: #f1f5f9;
  padding: 8px 16px;
  font-size: 0.84rem;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 60;
}

.demo-banner-inner {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  text-align: center;
}

.demo-banner-badge {
  background: rgba(99, 102, 241, 0.35);
  border: 1px solid rgba(165, 180, 252, 0.4);
  color: #e0e7ff;
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.demo-banner-text strong {
  color: #38bdf8;
  font-weight: 600;
}

.demo-banner-link {
  color: #38bdf8;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.15s ease;
}

.demo-banner-link:hover {
  color: #7dd3fc;
}

.demo-banner-text em {
  opacity: 0.8;
  font-size: 0.78rem;
  margin-left: 4px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 64px;
  max-width: 1440px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 18px;
}

.brand-badge {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 2px 8px;
  border-radius: 12px;
  background: var(--color-accent-gradient);
  color: #ffffff;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
}

.btn-theme-toggle:hover {
  background: var(--color-bg-subtle);
}

.nav-link-return {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s;
}

.nav-link-return:hover {
  color: var(--color-primary-hover);
}

/* Layout */
.app-layout {
  display: flex;
  justify-content: center;
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* Content Area */
.content-wrapper {
  flex: 1;
  padding: 40px 32px 80px;
  max-width: 860px;
  width: 100%;
  box-sizing: border-box;
}

.sandbox-section {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 28px 32px;
  margin: 36px 0;
}

.demo-banner {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 32px;
}

/* Critical Demo Access Callout */
.demo-access-callout {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.12) 0%, rgba(99, 102, 241, 0.15) 100%);
  border: 2px solid #f59e0b;
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.15);
  border-radius: 12px;
  padding: 18px 22px;
  margin: 24px 0;
  text-align: left;
}

.demo-access-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 800;
  color: #fbbf24;
  margin-bottom: 8px;
  letter-spacing: -0.2px;
}

[data-theme='light'] .demo-access-header {
  color: #b45309;
}

.demo-access-desc {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.5;
  margin: 0 0 14px 0 !important;
}

.demo-access-desc strong {
  color: #f59e0b;
}

[data-theme='light'] .demo-access-desc strong {
  color: #b45309;
}

.demo-access-action {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-access-request {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #f59e0b;
  color: #0f172a !important;
  font-weight: 700;
  font-size: 13px;
  padding: 8px 16px;
  border-radius: 8px;
  text-decoration: none !important;
  transition: all 0.15s ease;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.btn-access-request:hover {
  background: #fbbf24;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
}

.demo-access-hint {
  font-size: 12px;
  color: var(--color-text-muted);
}

.demo-banner h3 {
  font-size: 16px;
  color: var(--color-primary);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.demo-banner p {
  font-size: 14px;
  color: var(--color-text);
  margin: 0;
  line-height: 1.5;
}

/* Typography & Markdown Prose */
h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

h2 {
  font-size: 24px;
  font-weight: 700;
  margin-top: 36px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
}

h3 {
  font-size: 18px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 12px;
}

p {
  margin-bottom: 16px;
  font-size: 15px;
  line-height: 1.7;
}

ul,
ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

li {
  margin-bottom: 8px;
  font-size: 15px;
}

blockquote {
  border-left: 4px solid var(--color-primary);
  padding: 12px 18px;
  background: var(--color-bg-subtle);
  border-radius: 0 8px 8px 0;
  margin-bottom: 20px;
  font-style: normal;
}

code {
  font-family: var(--font-mono);
  font-size: 13.5px;
  background: var(--color-bg-subtle);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--color-border);
}

pre {
  background: #0d1117;
  color: #e6edf3;
  padding: 16px 20px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  overflow-x: auto;
  margin-bottom: 24px;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 13px;
  color: inherit;
}

/* Feature Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin: 32px 0;
}

.feature-card {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feature-card h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

.feature-card p {
  font-size: 13.5px;
  color: var(--color-text-muted);
  margin: 0;
}

/* Hero Section */
.hero-section {
  text-align: center;
  padding: 40px 0 20px;
}

.hero-title {
  font-size: 40px;
  font-weight: 800;
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--color-text-muted);
  max-width: 680px;
  margin: 0 auto 32px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
  padding: 10px 22px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

.btn-secondary {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 10px 22px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  transition: all 0.15s;
}

.btn-secondary:hover {
  border-color: var(--color-text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .app-layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding: 16px 24px;
  }
  .content-wrapper {
    padding: 24px;
  }
  .hero-title {
    font-size: 28px;
  }
}