/* Base Styles - Typography, Reset, Base Elements */

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

html {
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  text-align: center;
  font-family: var(--font-family-base);
  font-weight: var(--font-weight-normal);
  font-style: normal;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  transition: background-color var(--transition-base), color var(--transition-base);
}

body {
  margin: 0;
  background-color: var(--color-bg-secondary);
  min-height: 100vh;
  transition: background-color var(--transition-base);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-base);
  font-weight: var(--font-weight-bold);
  font-style: normal;
  margin: 0;
  line-height: 1.2;
  color: var(--color-text-primary);
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
}

h4 {
  font-size: clamp(1.1rem, 2.5vw, 1.25rem);
}

h5 {
  font-size: clamp(1rem, 2vw, 1.1rem);
}

h6 {
  font-size: clamp(0.9rem, 1.8vw, 1rem);
}

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

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

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

ul,
ol {
  list-style-position: inside;
  margin: 0 0 var(--spacing-md) 0;
  padding: 0;
}

li {
  margin: 0 0 var(--spacing-sm) 0;
  color: var(--color-text-secondary);
}

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

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  background-color: var(--color-bg-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

[data-theme="dark"] header {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

@media screen and (max-width: 768px) {
  header {
    padding: var(--spacing-sm) var(--spacing-lg);
  }
}


.logo {
  font-family: var(--font-family-base);
  font-weight: var(--font-weight-bold);
  font-style: normal;
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  color: var(--color-text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.logo:hover {
  color: var(--color-accent);
}

/* Footer */
footer {
  background-color: var(--color-bg-primary);
  padding: var(--spacing-2xl) var(--spacing-xl);
  margin: var(--spacing-3xl) 0 0 0;
  transition: background-color var(--transition-base);
}

footer p {
  margin: 0 0 var(--spacing-sm) 0;
  color: var(--color-text-secondary);
}

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

footer a:hover {
  color: var(--color-accent);
}

footer .colophon {
  font-size: 0.875rem;
  font-family: var(--font-family-base);
  margin: var(--spacing-xl) auto;
  width: 200px;
  opacity: 0.6;
  color: var(--color-text-tertiary);
}

footer svg {
  max-width: 80px;
  max-height: 80px;
  height: auto;
  opacity: 0.2;
  margin: var(--spacing-md) auto;
}

footer svg path {
  fill: var(--color-text-primary);
}

/* Main Content */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Responsive Breakpoints */
@media screen and (max-width: 768px) {
  header {
    padding: var(--spacing-md) var(--spacing-lg);
  }

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

  footer {
    padding: var(--spacing-xl) var(--spacing-lg);
  }
}

@media screen and (max-width: 480px) {
  header {
    padding: var(--spacing-sm) var(--spacing-md);
  }

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