/* ========================================
   CSS Reset
   ======================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--color-text);
}

h1 { font-size: var(--text-4xl); margin-bottom: var(--spacing-lg); }
h2 { font-size: var(--text-3xl); margin-bottom: var(--spacing-md); }
h3 { font-size: var(--text-2xl); margin-bottom: var(--spacing-md); }
h4 { font-size: var(--text-xl); margin-bottom: var(--spacing-sm); }
h5 { font-size: var(--text-lg); margin-bottom: var(--spacing-sm); }
h6 { font-size: var(--text-base); margin-bottom: var(--spacing-sm); }

p {
  margin-bottom: var(--spacing-md);
  line-height: var(--leading-relaxed);
}

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

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

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

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

blockquote {
  border-left: 4px solid var(--color-accent);
  padding: var(--spacing-md) var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  background: var(--color-bg-alt);
  font-style: italic;
  color: var(--color-text-secondary);
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-lg) 0;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

pre, code {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

pre {
  background: var(--color-bg-dark);
  color: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
  line-height: var(--leading-relaxed);
}

code {
  background: var(--color-bg-alt);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: var(--color-error);
}

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

small {
  font-size: var(--text-sm);
}

strong, b {
  font-weight: var(--weight-bold);
}

/* ========================================
   Container Classes
   ======================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
}

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

.container--wide {
  max-width: var(--container-wide);
}

/* ========================================
   Utility Classes
   ======================================== */

/* Text Alignment */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

/* Flexbox */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.flex-wrap {
  display: flex;
  flex-wrap: wrap;
}

.flex-1 {
  flex: 1;
}

/* Grid */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

/* Grid Gaps */
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

/* Margins */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mt-5 { margin-top: var(--spacing-2xl); }
.mt-6 { margin-top: var(--spacing-3xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-5 { margin-bottom: var(--spacing-2xl); }
.mb-6 { margin-bottom: var(--spacing-3xl); }

/* Padding */
.pt-0 { padding-top: 0; }
.pt-1 { padding-top: var(--spacing-sm); }
.pt-2 { padding-top: var(--spacing-md); }
.pt-3 { padding-top: var(--spacing-lg); }
.pt-4 { padding-top: var(--spacing-xl); }
.pt-5 { padding-top: var(--spacing-2xl); }
.pt-6 { padding-top: var(--spacing-3xl); }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: var(--spacing-sm); }
.pb-2 { padding-bottom: var(--spacing-md); }
.pb-3 { padding-bottom: var(--spacing-lg); }
.pb-4 { padding-bottom: var(--spacing-xl); }
.pb-5 { padding-bottom: var(--spacing-2xl); }
.pb-6 { padding-bottom: var(--spacing-3xl); }

/* Visibility */
.hidden {
  display: none !important;
}

.visible-desktop {
  display: block;
}

.visible-tablet {
  display: none;
}

.visible-mobile {
  display: none;
}

/* Screen Reader Only */
.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;
}

/* Misc */
.w-full { width: 100%; }
.h-full { height: 100%; }
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.rounded { border-radius: var(--radius-md); }
.rounded-full { border-radius: var(--radius-full); }
.shadow { box-shadow: var(--shadow-md); }
.bg-white { background: var(--color-white); }
.text-muted { color: var(--color-text-muted); }

/* ========================================
   Print Styles
   ======================================== */

@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  a,
  a:visited {
    text-decoration: underline;
  }

  pre,
  blockquote {
    border: 1px solid #999;
    page-break-inside: avoid;
  }

  thead {
    display: table-header-group;
  }

  tr,
  img {
    page-break-inside: avoid;
  }

  img {
    max-width: 100% !important;
  }

  p,
  h2,
  h3 {
    orphans: 3;
    widows: 3;
  }

  h2,
  h3 {
    page-break-after: avoid;
  }

  .sidebar,
  .topbar,
  .header,
  .footer,
  .btn,
  .no-print {
    display: none !important;
  }
}

/* ========================================
   Accessibility: Prefers 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;
  }
}

/* ========================================
   Responsive Breakpoint Adjustments
   ======================================== */

@media (max-width: 1024px) {
  .visible-desktop {
    display: none;
  }

  .visible-tablet {
    display: block;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .visible-tablet {
    display: none;
  }

  .visible-mobile {
    display: block;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .container {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }

  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-xl); }
}