/* ==========================================================================
   AiNoted Base Styles — base.css
   Global typography, body defaults, and foundational element styling.
   All values reference design tokens from variables.css.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Body
   -------------------------------------------------------------------------- */
body {
  background-color: var(--bg-base);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
}

/* --------------------------------------------------------------------------
   Headings — h1 through h6
   Modular scale with tighter tracking for a modern, dense feel.
   -------------------------------------------------------------------------- */
h1, .h1 {
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

h2, .h2 {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

h3, .h3 {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

h4, .h4 {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

h5, .h5 {
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-normal);
  color: var(--text-primary);
}

h6, .h6 {
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   Paragraphs
   -------------------------------------------------------------------------- */
p {
  margin-bottom: var(--space-4);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

p:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Links
   -------------------------------------------------------------------------- */
a {
  color: var(--primary-500);
  transition: color var(--duration-fast) var(--ease-default),
              text-decoration var(--duration-fast) var(--ease-default);
}

a:hover {
  color: var(--primary-400);
  text-decoration: underline;
}

a:active {
  color: var(--primary-600);
}

/* --------------------------------------------------------------------------
   Text Selection
   -------------------------------------------------------------------------- */
::selection {
  background-color: var(--primary-500);
  color: var(--text-primary);
}

::-moz-selection {
  background-color: var(--primary-500);
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   Custom Scrollbar (WebKit)
   -------------------------------------------------------------------------- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-deepest);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-700);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-deepest);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-600);
}

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--primary-700) var(--bg-deepest);
}

/* --------------------------------------------------------------------------
   Inline Code & Code Blocks
   -------------------------------------------------------------------------- */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--bg-surface);
  color: var(--primary-400);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-md);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  overflow-x: auto;
  line-height: var(--leading-relaxed);
}

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

/* --------------------------------------------------------------------------
   Keyboard Input
   -------------------------------------------------------------------------- */
kbd {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  background-color: var(--bg-overlay);
  color: var(--text-secondary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-default);
  box-shadow: 0 1px 0 var(--border-default);
}

/* --------------------------------------------------------------------------
   Blockquote
   -------------------------------------------------------------------------- */
blockquote {
  border-left: 3px solid var(--primary-500);
  padding-left: var(--space-4);
  margin: var(--space-4) 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* --------------------------------------------------------------------------
   Horizontal Rule
   -------------------------------------------------------------------------- */
hr {
  border: none;
  height: 1px;
  background-color: var(--border-subtle);
  margin: var(--space-8) 0;
}

/* --------------------------------------------------------------------------
   Focus Visible — Global keyboard-navigation outline.
   -------------------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Remove outline for mouse interactions */
:focus:not(:focus-visible) {
  outline: none;
}

/* --------------------------------------------------------------------------
   Small & Caption Text
   -------------------------------------------------------------------------- */
small,
.text-sm {
  font-size: var(--text-sm);
}

.text-xs {
  font-size: var(--text-xs);
}

.text-muted {
  color: var(--text-muted);
}

.text-tertiary {
  color: var(--text-tertiary);
}

/* --------------------------------------------------------------------------
   Strong & Emphasis
   -------------------------------------------------------------------------- */
strong, b {
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

em, i {
  font-style: italic;
}

/* --------------------------------------------------------------------------
   Mark (highlight)
   -------------------------------------------------------------------------- */
mark {
  background-color: var(--primary-900);
  color: var(--primary-200);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}