/**
 * Lakshya Welfare Society — Base Styles & Accessibility Reset
 * Implements WCAG 2.1 AA compliant typography, focus management,
 * reduced motion, and semantic defaults.
 */

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

html {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text-main);
  background-color: var(--color-cream);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

/* Accessibility: Skip Navigation Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 9999;
  background-color: var(--color-primary-900);
  color: var(--color-surface);
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  font-size: var(--text-sm);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-lg);
  transition: top var(--transition-fast);
  text-decoration: none;
}

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

/* Accessibility: High-Visibility Focus Rings */
:focus-visible {
  outline: 3px solid var(--color-primary-500);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Selection Color */
::selection {
  background-color: var(--color-primary-100);
  color: var(--color-primary-900);
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-primary-900);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2rem, 4vw + 1rem, var(--text-5xl));
  margin-bottom: var(--space-4);
}

h2 {
  font-size: clamp(1.625rem, 2.5vw + 0.75rem, var(--text-4xl));
  margin-bottom: var(--space-3);
}

h3 {
  font-size: clamp(1.25rem, 1.5vw + 0.5rem, var(--text-2xl));
  margin-bottom: var(--space-2);
}

h4 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-main);
  max-width: 68ch;
}

p.lead {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--color-text-muted);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-800);
  text-decoration-color: var(--color-accent);
}

img, svg, picture, video {
  max-width: 100%;
  height: auto;
  display: block;
}

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

li {
  margin-bottom: var(--space-2);
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-8) 0;
}

/* Utility: Visually Hidden for Screen Readers */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

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