/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Source+Sans+Pro:ital,wght@0,300;0,400;0,600;0,700;1,400;1,600&display=swap');

/* CSS Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-body-size);
  font-weight: var(--font-body-weight);
  line-height: var(--font-body-line-height);
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  flex: 1;
}

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

input, button, textarea, select {
  font: inherit;
}

/* Accessibility Focus States per DESIGN.md (2px accent-blue focus ring with 2px offset) */
:focus-visible {
  outline: 2px solid var(--color-accent) !important;
  outline-offset: 2px !important;
}

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--duration-fast) var(--easing-default);
}

a:hover {
  color: var(--color-accent-hover);
}

/* Typography Base Styles */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text);
  font-weight: var(--font-heading-weight);
  line-height: var(--font-heading-line-height);
  letter-spacing: var(--font-heading-letter-spacing);
}

h1 {
  font-size: var(--font-hero-size);
  line-height: var(--font-hero-line-height);
  letter-spacing: var(--font-display-letter-spacing);
  margin-bottom: var(--space-16);
}

@media (max-width: 768px) {
  h1 {
    font-size: var(--font-display-size);
  }
}

h2 {
  font-size: var(--font-display-size);
  line-height: var(--font-display-line-height);
  letter-spacing: var(--font-display-letter-spacing);
  margin-bottom: var(--space-12);
}

h3 {
  font-size: var(--font-heading-size);
  margin-bottom: var(--space-8);
}

h4 {
  font-size: var(--font-subheading-size);
  margin-bottom: var(--space-6);
}

p {
  margin-bottom: var(--space-16);
}

p:last-child {
  margin-bottom: 0;
}

ul, ol {
  margin-bottom: var(--space-16);
  padding-left: var(--space-24);
}

li {
  margin-bottom: var(--space-6);
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--space-24);
    padding-right: var(--space-24);
  }
}

.section {
  padding-top: var(--space-48);
  padding-bottom: var(--space-48);
}

@media (min-width: 768px) {
  .section {
    padding-top: var(--space-64);
    padding-bottom: var(--space-64);
  }
}

.section-surface {
  background-color: var(--color-surface);
}

.section-periwinkle {
  background-color: var(--color-background);
}

.section-dark {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4 {
  color: var(--color-on-primary);
}

.section-dark p {
  color: var(--color-text-on-dark-muted);
}

/* Eyebrow / Category Label */
.eyebrow {
  display: inline-block;
  font-size: var(--font-small-size);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-accent);
  margin-bottom: var(--space-8);
}

.section-dark .eyebrow {
  color: #8ab4f8;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--space-40);
}

.section-header.text-left {
  text-align: left;
  margin-left: 0;
  margin-right: 0;
}

/* 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: 0;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-accent);
  color: var(--color-on-primary);
  padding: var(--space-8) var(--space-16);
  z-index: 1000;
  text-decoration: none;
  font-weight: 600;
  border-radius: 0 0 var(--radius-sm) 0;
}

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