/**
 * OKHAM.ORG UI Kit - Base Styles
 * Foundation-grade typography, layout, and resets
 */

/* Modern CSS Reset */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--okham-font-family);
  font-size: var(--okham-font-size-base);
  line-height: var(--okham-line-height-normal);
  color: var(--okham-color-text);
  background-color: var(--okham-color-bg);
  min-height: 100vh;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--okham-font-weight-semibold);
  line-height: var(--okham-line-height-tight);
  color: var(--okham-color-text);
  margin-bottom: var(--okham-space-4);
}

h1 {
  font-size: var(--okham-font-size-4xl);
  font-weight: var(--okham-font-weight-bold);
}

h2 {
  font-size: var(--okham-font-size-3xl);
}

h3 {
  font-size: var(--okham-font-size-2xl);
}

h4 {
  font-size: var(--okham-font-size-xl);
}

h5 {
  font-size: var(--okham-font-size-lg);
}

h6 {
  font-size: var(--okham-font-size-base);
}

p {
  margin-bottom: var(--okham-space-4);
  color: var(--okham-color-text-secondary);
}

a {
  color: var(--okham-color-accent);
  text-decoration: none;
  transition: color var(--okham-transition-fast);
}

a:hover {
  color: var(--okham-color-accent-hover);
  text-decoration: underline;
}

a:focus-visible {
  outline: var(--okham-focus-ring-width) solid var(--okham-focus-ring-color);
  outline-offset: var(--okham-focus-ring-offset);
  border-radius: var(--okham-radius-sm);
}

code {
  font-family: var(--okham-font-family-mono);
  font-size: 0.9em;
  background-color: var(--okham-color-surface);
  padding: 0.125rem 0.25rem;
  border-radius: var(--okham-radius-sm);
  border: 1px solid var(--okham-color-border-subtle);
}

pre {
  font-family: var(--okham-font-family-mono);
  font-size: var(--okham-font-size-sm);
  background-color: var(--okham-color-surface);
  padding: var(--okham-space-4);
  border-radius: var(--okham-radius-md);
  border: 1px solid var(--okham-color-border);
  overflow-x: auto;
  margin-bottom: var(--okham-space-4);
}

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

ul, ol {
  margin-bottom: var(--okham-space-4);
  padding-left: var(--okham-space-6);
}

li {
  margin-bottom: var(--okham-space-2);
  color: var(--okham-color-text-secondary);
}

/* Container System */
.okham-container {
  width: 100%;
  max-width: var(--okham-container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--okham-space-4);
  padding-right: var(--okham-space-4);
}

@media (min-width: 640px) {
  .okham-container {
    padding-left: var(--okham-space-6);
    padding-right: var(--okham-space-6);
  }
}

@media (min-width: 1024px) {
  .okham-container {
    padding-left: var(--okham-space-8);
    padding-right: var(--okham-space-8);
  }
}

.okham-container-narrow {
  max-width: var(--okham-container-lg);
}

/* Section Spacing */
.okham-section {
  padding-top: var(--okham-space-16);
  padding-bottom: var(--okham-space-16);
}

@media (min-width: 768px) {
  .okham-section {
    padding-top: var(--okham-space-20);
    padding-bottom: var(--okham-space-20);
  }
}

@media (min-width: 1024px) {
  .okham-section {
    padding-top: var(--okham-space-24);
    padding-bottom: var(--okham-space-24);
  }
}

/* Utility Classes */
.okham-text-muted {
  color: var(--okham-color-text-muted);
}

.okham-text-secondary {
  color: var(--okham-color-text-secondary);
}

.okham-text-center {
  text-align: center;
}

.okham-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Focus-visible polyfill for better keyboard navigation */
:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: var(--okham-focus-ring-width) solid var(--okham-focus-ring-color);
  outline-offset: var(--okham-focus-ring-offset);
}

/* Smooth scroll behavior */
html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}