:root {
  --color-bg: #eff1f5;
  --color-surface: #e6e9ef;
  --color-border: #ccd0da;
  --color-text: #4c4f69;
  --color-text-secondary: #6c6f85;
  --color-accent: #40a02b;
  --color-accent-hover: #179299;
  --color-accent-secondary: #8839ef;
  --color-accent-secondary-hover: #9d4edd;
  --color-card-shadow: rgba(76, 79, 105, 0.08);
  --max-width: 960px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  --header-font: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --body-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1e1e2e;
    --color-surface: #313244;
    --color-border: #45475a;
    --color-text: #cdd6f4;
    --color-text-secondary: #a6adc8;
    --color-accent: #a6e3a1;
    --color-accent-hover: #94e2d5;
    --color-accent-secondary: #cba6f7;
    --color-accent-secondary-hover: #d38ef1;
    --color-card-shadow: rgba(0, 0, 0, 0.3);
  }
}

@media (prefers-contrast: more) {
  :root {
    --color-border: #999;
    --color-text-secondary: #333;
  }
  .site-header h1 .gradient-text {
    -webkit-text-fill-color: var(--color-accent);
    background: none;
    background-clip: unset;
    -webkit-background-clip: unset;
  }
}

@media (prefers-color-scheme: dark) and (prefers-contrast: more) {
  :root {
    --color-border: #888;
    --color-text-secondary: #bbb;
  }
  .site-header h1 .gradient-text {
    -webkit-text-fill-color: var(--color-accent);
    background: none;
    background-clip: unset;
    -webkit-background-clip: unset;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0s;
    --transition-base: 0s;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  html {
    scroll-padding-top: 0;
  }
  .site-header h1 .gradient-text {
    -webkit-text-fill-color: var(--color-accent);
    background: none;
    background-clip: unset;
    -webkit-background-clip: unset;
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 2rem;
}

body {
  font-family: var(--body-font);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

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

.site-header {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.site-header h1 {
  font-family: var(--header-font);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.site-header h1 .gradient-text {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: filter var(--transition-base);
}

.site-header h1:hover .gradient-text {
  filter: brightness(1.1);
}

.site-header .subtitle {
  color: var(--color-text-secondary);
  font-size: clamp(0.85rem, 2vw, 0.95rem);
}

.site-nav {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-xs);
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
}

.site-nav a:visited {
  color: var(--color-text-secondary);
}

.site-nav a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

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

.site-nav a:hover::after {
  width: 100%;
}

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

.section-title {
  font-family: var(--header-font);
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: "";
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  margin-top: 0.25rem;
}

.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

@media (min-width: 768px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.card {
  background: var(--color-surface);
  border: 2px solid transparent;
  border-radius: 8px;
  padding: var(--spacing-md);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: 0 8px 24px var(--color-card-shadow);
  transform: translateY(-2px);
  border-image: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary)) 1;
}

@supports not (border-image: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary)) 1) {
  .card:hover {
    box-shadow: 0 8px 24px var(--color-card-shadow);
    transform: translateY(-2px);
    border-color: var(--color-accent);
  }
}

.card-icon {
  width: 40px;
  height: 40px;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.card h3 {
  font-family: var(--header-font);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
}

.card ul {
  list-style: none;
  padding: 0;
}

.card ul li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.3rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.card ul li::before {
  content: "\2012";
  position: absolute;
  left: 0;
  color: var(--color-accent-secondary);
}

.links-section {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  margin-bottom: var(--spacing-xl);
}

.links-section h2 {
  font-family: var(--header-font);
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.links-section p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-md);
}

.links-section a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-accent);
  color: var(--color-bg);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.links-section a:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--color-card-shadow);
}

.links-section a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.links-section a:visited {
  color: var(--color-bg);
}

.site-footer {
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-xl);
}

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

a:focus,
a:hover {
  z-index: 1;
}

*:focus {
  outline-style: solid;
  outline-width: 2px;
  outline-offset: 2px;
}

@media (prefers-reduced-visuals: reduced) {
  .card {
    border-width: 2px;
  }
  .card-icon,
  .site-header h1 .gradient-text {
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: inherit;
  }
  .site-header h1 .gradient-text {
    -webkit-text-fill-color: var(--color-text);
  }
}