/**
 * Base Styles & CSS Reset
 * Discipleship Platform
 */

/* ========================================
   CSS RESET
   ======================================== */

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-size: 16px;
  line-height: var(--leading-normal);
}

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

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

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

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

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

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

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

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

p {
  margin-bottom: var(--space-4);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
}

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

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

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

em, i {
  font-style: italic;
}

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

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: var(--space-1) var(--space-2);
  background-color: var(--gray-100);
  border-radius: var(--radius-base);
  color: var(--gray-800);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background-color: var(--gray-100);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin-bottom: var(--space-4);
}

blockquote {
  border-left: 4px solid var(--primary-accent);
  padding-left: var(--space-4);
  margin: var(--space-4) 0;
  color: var(--text-secondary);
  font-style: italic;
}

hr {
  border: 0;
  border-top: 1px solid var(--border-light);
  margin: var(--space-8) 0;
}

/* ========================================
   LISTS
   ======================================== */

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

li {
  margin-bottom: var(--space-2);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
}

ul {
  list-style-type: disc;
}

ol {
  list-style-type: decimal;
}

/* ========================================
   FORMS
   ======================================== */

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

input:disabled, textarea:disabled, select:disabled, button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ========================================
   IMAGES & MEDIA
   ======================================== */

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

svg {
  max-width: 100%;
  height: auto;
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

/* Focus Styles - WCAG 2.1 AA Compliant */
*:focus {
  outline: 2px solid var(--primary-accent);
  outline-offset: 2px;
}

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

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

/* 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;
}

/* Skip to Content Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-accent);
  color: var(--white);
  padding: var(--space-2) var(--space-4);
  text-decoration: none;
  z-index: var(--z-tooltip);
}

.skip-link:focus {
  top: 0;
}

/* ========================================
   SELECTION
   ======================================== */

::selection {
  background-color: var(--primary-accent-light);
  color: var(--text-primary);
}

::-moz-selection {
  background-color: var(--primary-accent-light);
  color: var(--text-primary);
}

/* ========================================
   SCROLLBAR (Webkit)
   ======================================== */

::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--gray-400);
  border-radius: var(--radius-lg);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-500);
}

/* ========================================
   SMOOTH SCROLLING
   ======================================== */

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}