:root {
  --bg: #ffffff;
  --text: #111111;
  --highlight: #e8e8e8;
  --accent: #8fd8c9;
  --accent-shadow: #59aa99;
  --badge-text-size: 1rem;
  --border: #eeeeee;
  --font-mono: "Berkeley Mono", "JetBrains Mono", "SF Mono", "Menlo", monospace;
}

body.dark-theme {
  --bg: #121212;
  --text: #eeeeee;
  --highlight: #2a2a2a;
  --border: #333333;
}

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

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  line-height: 1.6;
  letter-spacing: -0.02em;
  padding: 4rem 1rem;
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

.container {
  max-width: 700px;
  margin: 0 auto;
}

.header-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.theme-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text);
  padding: 8px;
}

.theme-btn svg {
  width: 24px;
  height: 24px;
}
.sun-icon {
  display: block;
}
.moon-icon {
  display: none;
}
body.dark-theme .sun-icon {
  display: none;
}
body.dark-theme .moon-icon {
  display: block;
}

.highlight {
  background-color: var(--highlight);
  padding: 0.1em 0.3em;
  border-radius: 2px;
}

.divider {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 3rem 0;
}

.logo-link,
.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.22em;
  color: inherit;
  text-decoration: none;
  vertical-align: baseline;
  position: relative;
}

.logo-link-label,
.footer-link-label {
  display: inline-block;
  border-bottom: 1px solid #dddddd;
  line-height: 0.9;
  font-weight: 400;
  padding-bottom: 0.08em;
  transition: border-color 140ms ease;
}

.logo-link:hover .logo-link-label,
.footer-link:hover .footer-link-label {
  border-bottom-color: var(--text);
}

.logo-link-arrow,
.footer-link-arrow {
  font-size: 0.7em;
  line-height: 0.9;
  transform: translateY(0.03em);
}

.command-container {
  background: #f9f9f9;
  border: 1px solid var(--border);
  padding: 1.1rem 1.2rem;
  display: inline-flex;
  justify-content: space-between;
  align-items: center;
  width: min(100%, 28rem);
  margin: 2rem 0;
}

body.dark-theme .command-container {
  background: #1a1a1a;
}

.command-box {
  font-size: 0.9rem;
}

.copy-btn {
  background: var(--accent);
  color: #111111;
  border: none;
  padding: 0.35rem 0.8rem;
  border-radius: 0.45rem;
  box-shadow: 0 2px 0 0 var(--accent-shadow);
  cursor: pointer;
  position: relative;
}
.copy-btn::after,
.logo-link::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 140%;
  left: 50%;
  transform: translateX(-50%);
  background: #111111;
  color: #ffffff;
  padding: 0.3rem 0.5rem;
  border-radius: 0.35rem;
  font-size: 0.72rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 140ms ease;
  white-space: nowrap;
  z-index: 100;
}

.logo-link:hover::after {
  opacity: 1;
}

.copy-btn.show-tooltip::after {
  opacity: 1;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.card {
  border: 1px solid var(--border);
  padding: 1.5rem;
}
.tag-list {
  list-style: none;
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}
.tag-list li {
  font-size: 0.7rem;
  opacity: 0.6;
  border: 1px solid var(--border);
  padding: 2px 6px;
}

@media (max-width: 600px) {
  .grid {
    grid-template-columns: 1fr;
  }
  .command-container {
    width: 100%;
  }
}