/* ============================================
   IBM Design Language - Custom Stylesheet
   ============================================ */

/* ============================================
   1. CSS Variables (Design Tokens)
   ============================================ */

:root {
  /* Primary Colors */
  --ibm-blue: #0f62fe;
  --ibm-blue-dark: #0043ce;
  --ibm-blue-light: #4589ff;

  /* Grayscale */
  --ibm-gray-10: #f4f4f4;
  --ibm-gray-20: #e0e0e0;
  --ibm-gray-30: #c6c6c6;
  --ibm-gray-50: #8d8d8d;
  --ibm-gray-70: #525252;
  --ibm-gray-90: #262626;
  --ibm-gray-100: #161616;

  /* Semantic Colors */
  --ibm-white: #ffffff;
  --ibm-green: #24a148;
  --ibm-red: #da1e28;
  --ibm-yellow: #f1c21b;

  /* Spacing System */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-2xl: 3rem;     /* 48px */

  /* Typography */
  --font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: 'IBM Plex Mono', 'Courier New', Courier, monospace;

  /* Design Tokens */
  --border-radius: 0;      /* IBM Design Language: No rounded corners */
  --transition: all 0.2s cubic-bezier(0.2, 0, 0.38, 0.9);
}

/* ============================================
   2. Base Styles
   ============================================ */

html {
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  color: var(--ibm-gray-70);
}

/* ============================================
   3. Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family);
  color: var(--ibm-gray-90);
  font-weight: 600;
}

h1 {
  font-size: 2.5rem;      /* 40px */
  line-height: 1.2;
  margin-bottom: var(--spacing-xl);
}

h2 {
  font-size: 2rem;        /* 32px */
  line-height: 1.25;
  margin-bottom: var(--spacing-lg);
}

h3 {
  font-size: 1.5rem;      /* 24px */
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: 1.25rem;     /* 20px */
  line-height: 1.4;
  margin-bottom: var(--spacing-md);
}

p {
  font-size: 1rem;        /* 16px */
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

small {
  font-size: 0.875rem;    /* 14px */
}

/* ============================================
   4. Code Blocks
   ============================================ */

code {
  font-family: var(--font-family-mono);
  background-color: var(--ibm-gray-10);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
}

pre {
  font-family: var(--font-family-mono);
  background-color: var(--ibm-gray-10);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  overflow-x: auto;
}

pre code {
  background-color: transparent;
  padding: 0;
}

/* Inline code with IBM red accent */
:not(pre) > code {
  color: var(--ibm-red);
}

/* ============================================
   5. Links
   ============================================ */

a {
  color: var(--ibm-blue);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--ibm-blue-dark);
  text-decoration: underline;
}

a:focus {
  outline: 2px solid var(--ibm-blue);
  outline-offset: 2px;
}

/* ============================================
   6. Buttons
   ============================================ */

button,
.md-button {
  font-family: var(--font-family);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.md-button--primary {
  background-color: var(--ibm-blue);
  color: var(--ibm-white);
}

.md-button--primary:hover {
  background-color: var(--ibm-blue-dark);
}

/* ============================================
   7. Tables
   ============================================ */

table {
  border-collapse: collapse;
  width: 100%;
  margin-bottom: var(--spacing-lg);
}

th {
  background-color: var(--ibm-gray-10);
  color: var(--ibm-gray-90);
  font-weight: 600;
  text-align: left;
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 2px solid var(--ibm-gray-20);
}

td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--ibm-gray-20);
}

tr:hover {
  background-color: var(--ibm-gray-10);
}

/* ============================================
   8. Admonitions
   ============================================ */

.admonition {
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.admonition.note {
  border-left: 4px solid var(--ibm-blue);
  background-color: rgba(15, 98, 254, 0.05);
}

.admonition.warning {
  border-left: 4px solid var(--ibm-yellow);
  background-color: rgba(241, 194, 27, 0.05);
}

.admonition.danger {
  border-left: 4px solid var(--ibm-red);
  background-color: rgba(218, 30, 40, 0.05);
}

.admonition.success {
  border-left: 4px solid var(--ibm-green);
  background-color: rgba(36, 161, 72, 0.05);
}

/* ============================================
   9. Navigation
   ============================================ */

.md-header {
  background-color: var(--ibm-gray-100);
}

.md-tabs {
  background-color: var(--ibm-gray-100);
}

/* Top navigation tabs - white text */
.md-tabs__link {
  color: var(--ibm-white) !important;
  opacity: 0.7;
}

.md-tabs__link--active,
.md-tabs__link:hover {
  color: var(--ibm-white) !important;
  opacity: 1;
}

/* Sidebar Navigation - smaller than body text (14px) */
.md-nav {
  font-size: 0.875rem;  /* 14px - smaller than body text (16px) */
}

.md-nav__link {
  color: var(--ibm-gray-90);
  font-size: 0.875rem;  /* 14px */
}

.md-nav__link:hover {
  color: var(--ibm-blue);
}

.md-nav__link--active {
  color: var(--ibm-blue);
  font-weight: 600;
}

/* Primary navigation items */
.md-nav--primary .md-nav__item {
  font-size: 0.875rem;  /* 14px for main sections */
}

.md-nav--primary .md-nav__link {
  font-size: 0.875rem;  /* 14px */
}

/* Secondary navigation items (subsections) */
.md-nav--secondary .md-nav__link {
  font-size: 0.875rem;  /* 14px for subsections */
}

/* ============================================
   10. Content Area
   ============================================ */

.md-content {
  padding: var(--spacing-xl);
}

/* ============================================
   11. Images
   ============================================ */

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
}

/* ============================================
   12. Blockquotes
   ============================================ */

blockquote {
  border-left: 4px solid var(--ibm-blue);
  padding-left: var(--spacing-md);
  margin-left: 0;
  color: var(--ibm-gray-70);
  font-style: italic;
}

/* ============================================
   13. Horizontal Rules
   ============================================ */

hr {
  border: none;
  border-top: 1px solid var(--ibm-gray-20);
  margin: var(--spacing-xl) 0;
}

/* ============================================
   14. Lists
   ============================================ */

ul, ol {
  padding-left: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   15. Responsive Design
   ============================================ */

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  .md-content {
    padding: var(--spacing-md);
  }
}

/* ============================================
   16. Accessibility Enhancements
   ============================================ */

/* Focus indicators */
*:focus {
  outline: 2px solid var(--ibm-blue);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --ibm-gray-70: #000000;
    --ibm-gray-90: #000000;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================
   17. Content Width Customization
   ============================================ */

/* グリッド全体を自然に広げる（デフォルト: 61rem ≈ 976px → 80rem ≈ 1280px） */
.md-grid {
  max-width: 80rem;
}

/* コンテンツエリアを少し広げる（デフォルト: 46rem ≈ 736px → 56rem ≈ 896px） */
.md-content__inner {
  max-width: 56rem;
}

/* Made with Bob */