/* Mobile-first responsive design with dark mode support */

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #555555;
  --color-border: #e0e0e0;
  --color-accent: #0066cc;
  --color-accent-hover: #0052a3;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --text-base: 1.125rem;
  --text-lg: 1.375rem;
  --text-xl: 2rem;
  --text-h1: 2.75rem;
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0d0d0d;
    --color-text: #f5f5f5;
    --color-text-secondary: #b0b0b0;
    --color-border: #2a2a2a;
    --color-accent: #4d9fff;
    --color-accent-hover: #6ca8ff;
  }
}

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

html {
  scroll-behavior: auto;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--duration-normal) var(--ease), color var(--duration-normal) var(--ease);
}

body.not-found {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  text-align: center;
}

/* Layout */
.container {
  width: 100%;
  max-width: 42rem;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

header {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

main {
  min-height: calc(100vh - 300px);
  padding: var(--space-xl) 0;
}

.not-found-main {
  display: flex;
  flex: 1;
  align-items: center;
  min-height: auto;
}

.not-found-main .container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.not-found-main h1 {
  margin-bottom: var(--space-md);
  font-size: var(--text-h1);
}

.not-found-main a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.not-found-main a:hover {
  color: var(--color-accent-hover);
}

footer {
  margin-top: var(--space-xl);
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

section {
  margin-bottom: var(--space-xl);
}

/* Typography */
.wordmark {
  font-size: var(--text-h1);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.2;
}

h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-md);
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

p:last-child {
  margin-bottom: 0;
}

/* Hero section */
.hero h2 {
  color: var(--color-text);
}

/* Contact section */
.contact h2 {
  color: var(--color-text);
}

.contact p a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
  transition: color var(--duration-fast) var(--ease), border-color var(--duration-fast) var(--ease);
}

.contact p a:hover {
  color: var(--color-accent-hover);
  border-bottom-color: var(--color-accent-hover);
}

.contact p a:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  text-decoration: underline;
  border-radius: 2px;
}

.contact-details {
  margin-top: var(--space-md);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

/* Footer */
footer p {
  margin-bottom: var(--space-sm);
  font-size: 0.875rem;
}

footer p:last-child {
  margin-bottom: 0;
}

.privacy-notice {
  margin-top: var(--space-md);
  font-size: 0.8rem;
}

/* Responsive */
@media (min-width: 640px) {
  .container {
    padding: 0 var(--space-lg);
  }

  main {
    padding: var(--space-xl) 0;
  }
}

/* Focus management */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

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