:root {
  --color-bg: #f5f5f5;
  --color-text: #555;
  --color-text-dark: #000;
  --color-link: #555;
  --color-link-hover: #000;
  --color-border: #ccc;
  --color-card-bg: #fff;

  --font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: clamp(16px, 1vw + 14px, 20px);
  --font-size-small: clamp(14px, 0.9vw + 12px, 18px);
  --font-size-h2: clamp(24px, 2vw + 20px, 32px);

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;

  --max-width: 50em;
  --gap: clamp(1rem, 2vw, 2rem);

  --transition: all 150ms ease-in-out;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--spacing-md) 0;
  line-height: 1.3;
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: 600;
}

p {
  margin: 0 0 var(--spacing-md) 0;
}

small {
  font-size: var(--font-size-small);
}

em {
  font-style: italic;
}

strong {
  font-weight: 600;
}

a,
a:link,
a:visited {
  border-bottom: 0.1em solid rgba(85, 85, 85, 0.3);
  color: var(--color-link);
  text-decoration: none;
  transition: var(--transition);
}

a:hover,
a:focus,
a:active {
  border-bottom-color: var(--color-text-dark);
  color: var(--color-text-dark);
}

a:focus {
  outline: 2px solid var(--color-text-dark);
  outline-offset: 2px;
}

.container {
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 0 var(--spacing-md);
}

header {
  padding: var(--spacing-lg) 0;
}

.header-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

@media (min-width: 32em) {
  .header-content {
    grid-template-columns: auto 1fr;
    gap: var(--spacing-md);
  }
}

.logo-section {
  display: flex;
  align-items: center;
}

.logo-section a {
  border: none;
  display: block;
}

.logo {
  display: block;
  width: 100%;
  height: auto;
  max-width: 200px;
}

.logo--inline {
  display: block;
}

.logo--stacked {
  display: none;
  max-width: 123px;
}

@media (min-width: 32em) {
  .logo--inline {
    display: none;
  }

  .logo--stacked {
    display: block;
  }
}

@media (min-width: 50em) {
  .logo--inline {
    display: block;
  }

  .logo--stacked {
    display: none;
  }
}

.intro-section {
  flex: 1;
}

.intro {
  margin: 0;
  font-size: clamp(14px, 1.5vw + 12px, 18px);
  line-height: 1.7;
}

main {
  padding: var(--spacing-lg) 0;
}

main > .container > p {
  margin-bottom: var(--spacing-lg);
}

.repos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--gap);
  margin: var(--spacing-sm) 0;
}

.repo-card {
  padding: var(--spacing-lg);
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  transition: var(--transition);
}

.repo-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-color: var(--color-link-hover);
}

.repo-card h2 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  font-size: clamp(20px, 1.5vw + 18px, 28px);
}

.repo-card h2 a {
  color: inherit;
  border: none;
}

.repo-card h2 a:hover {
  color: var(--color-link-hover);
}

.repo-card p {
  margin-bottom: 0;
  font-size: var(--font-size-small);
  color: var(--color-text);
}

footer {
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-small);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
}

.copyright {
  margin: 0;
  text-align: center;
}

@media (min-width: 50em) {
  .copyright {
    text-align: left;
  }
}

.copyright a {
  color: inherit;
}

@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;
  }
}