/* Base Styles and Typography */
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  font-size: var(--font-size-body);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  font-weight: var(--font-weight-normal);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

p {
  font-size: var(--font-size-body);
  line-height: var(--line-height-normal);
}

/* Mobile Typography Adjustments */
@media (max-width: 1023px) {
  h1, h2, h3, h4, h5, h6 {
    line-height: var(--line-height-normal);
  }
}

/* Desktop Typography Adjustments */
@media (min-width: 1024px) {
  h1, h2, h3, h4, h5, h6 {
    letter-spacing: var(--letter-spacing-tight);
  }
}

/* Links */
a {
  color: var(--color-text);
  -webkit-transition: opacity var(--transition-fast);
  -o-transition: opacity var(--transition-fast);
  transition: opacity var(--transition-fast);
}

a:hover {
  opacity: 0.8;
}

a:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

a:focus:not(:focus-visible) {
  outline: none;
}

/* Buttons */
button {
  font-family: inherit;
  cursor: pointer;
  -webkit-transition: -webkit-transform var(--transition-fast), opacity var(--transition-fast);
  transition: -webkit-transform var(--transition-fast), opacity var(--transition-fast);
  -o-transition: transform var(--transition-fast), opacity var(--transition-fast);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  transition: transform var(--transition-fast), opacity var(--transition-fast), -webkit-transform var(--transition-fast);
}

button:hover {
  opacity: 0.9;
}

button:active {
  -webkit-transform: scale(0.98);
  -ms-transform: scale(0.98);
  transform: scale(0.98);
}

button:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

button:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

button:focus:not(:focus-visible) {
  outline: none;
}

/* Utility Classes */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Enhanced focus indicators for better keyboard navigation visibility */
*:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

/* Ensure focus is visible on all interactive elements */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

/* Skip to main content link - for keyboard navigation accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  z-index: 10000;
  padding: 1rem 1.5rem;
  background-color: var(--color-text);
  color: var(--color-background);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  -webkit-border-radius: 0 0 var(--radius-sm) 0;
  border-radius: 0 0 var(--radius-sm) 0;
  -webkit-transition: top var(--transition-fast);
  -o-transition: top var(--transition-fast);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

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

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}