/**
 * Content Pages Design System
 * Standalone CSS for static content pages (no React/Tailwind dependency)
 * Matches the main app's design tokens for visual consistency
 */

/* ===========================================
   DESIGN TOKENS
   =========================================== */
:root {
  /* Colors - matching app */
  --color-bg: #0f0f12;
  --color-surface: #1a1a1f;
  --color-surface-hover: #2a2a35;

  --color-content: #fafafa;
  --color-content-secondary: #a1a1aa;
  --color-content-tertiary: #8b8c92;
  --color-content-disabled: #6b6b75;

  --color-stroke-subtle: #2a2a35;

  --color-accent: #f59e0b;
  --color-accent-hover: #fbbf24;

  /* Typography */
  --font-sans: 'IBM Plex Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Layout */
  --content-max-width: 720px;
  --nav-height: 56px;
}

/* ===========================================
   BASE RESET & DEFAULTS
   =========================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-content);
  line-height: 1.6;
  min-height: 100vh;
}

/* ===========================================
   SKIP LINK (Accessibility)
   =========================================== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-accent);
  color: var(--color-bg);
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 6px 6px;
  z-index: 200;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
}

/* ===========================================
   NAVIGATION
   =========================================== */
.content-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  padding: 0 var(--space-lg);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-stroke-subtle);
}

.content-nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 600;
  color: var(--color-content);
  text-decoration: none;
}

.content-nav__logo:hover {
  color: var(--color-accent);
}

.content-nav__logo svg {
  width: 24px;
  height: 24px;
}

.content-nav__cta {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-bg);
  background-color: var(--color-accent);
  text-decoration: none;
  border-radius: 6px;
  transition: background-color 0.15s ease;
}

.content-nav__cta:hover {
  background-color: var(--color-accent-hover);
}

.content-nav__logo:focus-visible,
.content-nav__cta:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===========================================
   PAGE LAYOUT
   =========================================== */
.content-page {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg) var(--space-3xl);
}

/* ===========================================
   TYPOGRAPHY
   =========================================== */
.content-h1 {
  font-size: 2.25rem;
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-lg);
  color: var(--color-content);
}

/* Lead paragraph - first p after h1 */
.content-h1 + p {
  font-size: 1.125rem;
  color: var(--color-content);
  margin-bottom: var(--space-xl);
}

.content-h2 {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.3;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  color: var(--color-content);
}

.content-h3 {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-content);
}

.content-body p {
  margin-bottom: var(--space-md);
  color: var(--color-content-secondary);
}

.content-body a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.content-body a:hover {
  color: var(--color-accent-hover);
}

.content-body a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.content-body strong {
  font-weight: 600;
  color: var(--color-content);
}

/* External links get a subtle indicator */
.content-body a[target="_blank"]::after {
  content: " ↗";
  font-size: 0.75em;
  opacity: 0.7;
}

/* ===========================================
   LISTS
   =========================================== */
.content-list {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
  color: var(--color-content-secondary);
}

.content-list li {
  margin-bottom: var(--space-sm);
}

.content-list li::marker {
  color: var(--color-accent);
}

/* ===========================================
   TABLES
   =========================================== */
.content-body table {
  width: 100%;
  margin: var(--space-lg) 0;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.content-body th,
.content-body td {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--color-stroke-subtle);
}

.content-body th {
  font-weight: 600;
  color: var(--color-content);
  background-color: var(--color-surface);
}

.content-body td {
  color: var(--color-content-secondary);
}

.content-body tbody tr:hover td {
  background-color: var(--color-surface);
}

/* ===========================================
   CODE BLOCKS
   =========================================== */
.content-body pre {
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  background-color: var(--color-surface);
  border-radius: 8px;
  overflow-x: auto;
}

.content-body pre code {
  padding: 0;
  background: none;
  color: var(--color-content-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* ===========================================
   CALLOUT BOX
   =========================================== */
.content-callout {
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-xl) 0;
  background-color: var(--color-surface);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 6px 6px 0;
}

.content-callout p {
  margin: 0;
  color: var(--color-content-secondary);
}

/* ===========================================
   CALL TO ACTION
   =========================================== */
.content-body .content-cta {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  margin: var(--space-xl) 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-bg);
  background-color: var(--color-accent);
  border-radius: 8px;
  text-decoration: none;
  transition: background-color 0.15s ease;
}

.content-body .content-cta:hover {
  background-color: var(--color-accent-hover);
  color: var(--color-bg);
}

.content-body .content-cta:focus-visible {
  outline: 2px solid var(--color-content);
  outline-offset: 2px;
}

/* ===========================================
   CODE
   =========================================== */
.content-body code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.125em 0.375em;
  background-color: var(--color-surface);
  border-radius: 4px;
  color: var(--color-accent);
}

/* ===========================================
   FOOTER
   =========================================== */
.content-footer {
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-stroke-subtle);
}

.content-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
}

.content-footer__links a {
  font-size: 0.875rem;
  color: var(--color-content-tertiary);
  text-decoration: none;
}

.content-footer__links a:hover {
  color: var(--color-accent);
}

.content-footer__links a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.content-footer__copyright {
  font-size: 0.75rem;
  color: var(--color-content-disabled);
}

/* ===========================================
   RESPONSIVE
   =========================================== */
@media (max-width: 640px) {
  .content-h1 {
    font-size: 1.75rem;
  }

  .content-h2 {
    font-size: 1.25rem;
  }

  .content-page {
    padding: var(--space-xl) var(--space-md) var(--space-2xl);
  }

  .content-nav {
    padding: 0 var(--space-md);
  }

  .content-nav__logo span {
    display: none;
  }

  .content-body table {
    display: block;
    overflow-x: auto;
  }
}