/* === Reset + Base Typography === */

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

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

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

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--surface-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === Typography === */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.2;
  color: var(--text-primary);
}

h1 {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

h4 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  line-height: 1.3;
}

p {
  margin-bottom: var(--space-4);
}

a {
  color: var(--link-color);
  text-decoration: none;
  transition: color var(--duration-micro) var(--ease-stop-motion-3);
}

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

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

/* === Layout === */

.container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

/* === Focus === */

:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

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

/* === Skip Link === */

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--color-primary-500);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--font-size-sm);
  z-index: 100;
  transition: top var(--duration-short) var(--ease-standard);
}

.skip-link:focus {
  top: var(--space-2);
}

/* === Selection === */

::selection {
  background: var(--color-primary-100);
  color: var(--color-primary-900);
}

@media (prefers-color-scheme: dark) {
  ::selection {
    background: var(--color-primary-800);
    color: var(--color-primary-100);
  }
}