/* ===== BASE STYLES & RESET ===== */
/* Foundation styles for Onyx Mail with proper element defaults */

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

/* ===== ROOT & HTML ===== */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  font-display: swap;
  height: 100%;
}

/* ===== BODY ===== */
body {
  font-family: var(--font-primary);
  font-size: var(--font-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--bg-base);
  overflow-x: hidden;
  min-height: 100vh;
  
  /* Font rendering optimizations */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-display: swap;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-md);
}

h1 {
  font-size: var(--font-5xl);
  font-weight: var(--font-weight-light);
  letter-spacing: 0.1em;
}

h2 {
  font-size: var(--font-3xl);
  color: var(--color-text-primary);
}

h3 {
  font-size: var(--font-2xl);
  color: var(--color-text-primary);
}

h4 {
  font-size: var(--font-xl);
  color: var(--color-text-secondary);
}

h5 {
  font-size: var(--font-lg);
  color: var(--color-text-secondary);
}

h6 {
  font-size: var(--font-base);
  color: var(--color-text-secondary);
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ===== LINKS ===== */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover,
a:focus {
  color: var(--color-secondary);
  text-decoration: none;
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===== LISTS ===== */
ul, ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
}

li {
  margin-bottom: var(--space-xs);
  color: var(--color-text-secondary);
}

/* Remove default list styles for nav elements */
nav ul,
nav ol {
  list-style: none;
  padding: 0;
  margin: 0;
}

nav li {
  margin: 0;
}

/* ===== CODE & PREFORMATTED ===== */
code,
pre,
samp,
kbd {
  font-family: var(--font-mono);
  font-size: 0.875em;
}

code {
  padding: 0.125rem 0.25rem;
  background: rgba(var(--color-primary-rgb), 0.1);
  border-radius: var(--radius-sm);
  color: var(--color-text-mono);
}

pre {
  padding: var(--space-md);
  background: var(--bg-card);
  border: var(--border-dark-subtle);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--space-md);
  line-height: var(--line-height-normal);
}

pre code {
  padding: 0;
  background: none;
  border-radius: 0;
}

/* ===== FORM ELEMENTS ===== */
input,
textarea,
select,
button {
  font-family: inherit;
  font-size: var(--font-base);
  line-height: var(--line-height-normal);
}

/* ===== IMAGES ===== */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ===== TABLES ===== */
table {
  border-collapse: collapse;
  width: 100%;
  margin-bottom: var(--space-md);
}

th,
td {
  padding: var(--space-sm);
  text-align: left;
  border-bottom: var(--border-dark-subtle);
}

th {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-semibold);
}

td {
  color: var(--color-text-secondary);
}

/* ===== BLOCKQUOTE ===== */
blockquote {
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-card);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
}

blockquote p {
  color: var(--color-text-primary);
  font-style: italic;
}

/* ===== HORIZONTAL RULE ===== */
hr {
  border: none;
  height: 1px;
  background: var(--border-dark);
  margin: var(--space-2xl) 0;
}

/* ===== ACCESSIBILITY ===== */
/* Screen reader only content */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip to content link */
.skip-link {
  position: absolute;
  top: -9999px;
  left: -9999px;
  background: var(--color-primary);
  color: white;
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  border-radius: var(--radius-md);
  z-index: var(--z-toast);
}

.skip-link:focus {
  top: var(--space-md);
  left: var(--space-md);
}

/* ===== SELECTION ===== */
::selection {
  background: rgba(var(--color-primary-rgb), 0.3);
  color: var(--color-text-primary);
}

::-moz-selection {
  background: rgba(var(--color-primary-rgb), 0.3);
  color: var(--color-text-primary);
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-dark-secondary);
}

::-webkit-scrollbar-thumb {
  background: rgba(var(--color-primary-rgb), 0.3);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(var(--color-primary-rgb), 0.5);
}

/* ===== FOCUS MANAGEMENT ===== */
/* Focus styles for better accessibility */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}