/* ==============================================================================
   BASE & RESET STYLES - zeshannasir.com
   ============================================================================== */

/* Self-hosted variable fonts. No third-party request is made for typography,
   which is what lets the page claim zero third-party telemetry truthfully. */
@font-face {
  font-family: 'Inter';
  src: url('../assets/fonts/inter-var.woff2') format('woff2-variations');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'JetBrains Mono';
  src: url('../assets/fonts/jetbrains-mono-var.woff2') format('woff2-variations');
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-canvas);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

::selection {
  background-color: var(--accent-teal);
  color: var(--text-inverse);
}

/* Accessible focus ring */
:focus-visible {
  outline: 2px solid var(--accent-teal);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Accessibility skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1.5rem;
  padding: 0.75rem 1.25rem;
  background: var(--accent-teal);
  color: var(--text-inverse);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-md);
  z-index: 10000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1.5rem;
}

/* Fluid Layout Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--text-primary);
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  font-weight: var(--weight-bold);
}

h1 { font-size: var(--text-h1); }
h2 { font-size: var(--text-h2); }
h3 { font-size: var(--text-h3); }

p {
  color: var(--text-secondary);
  font-size: var(--text-body);
  line-height: var(--leading-normal);
}

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

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

ul, ol {
  list-style: none;
}

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

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

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