@layer reset, base, page;

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

  * {
    margin: 0;
  }

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

  body {
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
  }
}

@layer base {
  :root {
    color-scheme: light dark;

    --color-bg: hsl(220 15% 97%);
    --color-text: hsl(220 15% 12%);
    --color-text-muted: hsl(220 10% 35%);
    --color-accent: hsl(220 80% 45%);
    --color-accent-hover: hsl(220 80% 35%);

    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
                 Roboto, "Helvetica Neue", Arial, sans-serif;

    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-3xl: clamp(2rem, 5vw, 3.5rem);
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --color-bg: hsl(220 15% 8%);
      --color-text: hsl(220 15% 90%);
      --color-text-muted: hsl(220 10% 65%);
      --color-accent: hsl(220 80% 65%);
      --color-accent-hover: hsl(220 80% 55%);
    }
  }

  @media (prefers-contrast: more) {
    :root {
      --color-text: hsl(0 0% 0%);
      --color-text-muted: hsl(0 0% 20%);
    }
  }

  body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-bg);
  }

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

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

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

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

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

@layer page {
  .skip-link {
    position: absolute;
    inset-inline-start: -9999px;
    padding: 0.5rem 1rem;
    background: var(--color-accent);
    color: hsl(0 0% 100%);
    z-index: 100;
  }

  .skip-link:focus {
    inset-inline-start: 1rem;
    inset-block-start: 1rem;
  }

  .hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
    text-align: center;
  }

  .hero h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
  }

  .tagline {
    margin-block-start: 0.5rem;
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
  }

  .description {
    margin-block-start: 1.5rem;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
    max-width: 56ch;
  }

  .project {
    margin-block-start: 2rem;
    font-size: var(--font-size-sm);
  }

  .contact {
    margin-block-start: 1rem;
    font-size: var(--font-size-sm);
  }
}