/**
 * Base styles: resets, typography, and element defaults.
 */

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

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

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text-body);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Headings */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  color: var(--color-text);
  line-height: 1.1;
  margin-top: 0;
  text-transform: uppercase;
}

h1 {
  font-size: var(--text-hero);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 0.96;
}

h2 {
  font-size: var(--text-5xl);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
}

h4 {
  font-size: var(--text-lg);
  font-weight: 700;
}

/* Paragraphs */
p {
  margin-top: 0;
  margin-bottom: 1em;
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

/* Lists */
ul,
ol {
  padding-left: 1.5em;
}

li {
  margin-bottom: 0.5em;
}

/* Selection */
::selection {
  background-color: rgba(47, 123, 255, 0.3);
  color: var(--color-text);
}

/* Focus styles for accessibility */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* Remove default button styles */
button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* Visually hidden (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;
}