/* Light/dark theming inspired by x.com. Defaults to system; overridable via [data-theme] on <html>. */
:root {
  --bg: #ffffff;
  --bg-subtle: #f7f9f9;
  --bg-hover: #eff3f4;
  --fg: #0f1419;
  --fg-muted: #536471;
  --border: #eff3f4;
  --border-strong: #cfd9de;
  --accent: #1d9bf0;
  --accent-hover: #1a8cd8;
  --code-bg: #eff3f4;
  --focus: #1d9bf0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --bg-subtle: #16181c;
    --bg-hover: #1d1f23;
    --fg: #e7e9ea;
    --fg-muted: #71767b;
    --border: #2f3336;
    --border-strong: #3e4144;
    --code-bg: #1d1f23;
  }
}

:root[data-theme='light'] {
  --bg: #ffffff;
  --bg-subtle: #f7f9f9;
  --bg-hover: #eff3f4;
  --fg: #0f1419;
  --fg-muted: #536471;
  --border: #eff3f4;
  --border-strong: #cfd9de;
  --code-bg: #eff3f4;
}

:root[data-theme='dark'] {
  --bg: #000000;
  --bg-subtle: #16181c;
  --bg-hover: #1d1f23;
  --fg: #e7e9ea;
  --fg-muted: #71767b;
  --border: #2f3336;
  --border-strong: #3e4144;
  --code-bg: #1d1f23;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

code {
  background: var(--code-bg);
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, monospace;
  font-size: 0.9em;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--fg);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.brand:hover {
  text-decoration: none;
  color: var(--fg);
}
.brand .arrow {
  color: var(--accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 0.85rem;
  border-radius: 9999px;
  color: var(--fg);
  font-weight: 500;
  font-size: 0.95rem;
}
.site-nav a:hover {
  background: var(--bg-hover);
  text-decoration: none;
}
.site-nav a[aria-current='page'] {
  background: var(--bg-hover);
  font-weight: 700;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-left: 0.5rem;
  border: 1px solid transparent;
  border-radius: 9999px;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
}
.theme-toggle:hover {
  background: var(--bg-hover);
}
.theme-toggle:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}
.theme-toggle .icon-sun {
  display: none;
}
.theme-toggle .icon-moon {
  display: block;
}
@media (prefers-color-scheme: dark) {
  .theme-toggle .icon-sun { display: block; }
  .theme-toggle .icon-moon { display: none; }
}
:root[data-theme='dark'] .theme-toggle .icon-sun { display: block; }
:root[data-theme='dark'] .theme-toggle .icon-moon { display: none; }
:root[data-theme='light'] .theme-toggle .icon-sun { display: none; }
:root[data-theme='light'] .theme-toggle .icon-moon { display: block; }

/* Main */
.site-main {
  flex: 1;
  max-width: 880px;
  margin: 0 auto;
  width: 100%;
  padding: 3rem 1.5rem 4rem;
}

/* Hero */
.hero {
  margin-bottom: 3rem;
}
.hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0 0 1rem;
}
.lede {
  font-size: 1.1rem;
  color: var(--fg-muted);
  margin: 0;
  max-width: 56ch;
}

/* Tool grid */
.tools {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.tool-card {
  display: block;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  color: var(--fg);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}
.tool-card:hover {
  background: var(--bg-subtle);
  border-color: var(--border-strong);
  text-decoration: none;
}
.tool-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 9999px;
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.tool-card h2 {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 0.25rem;
}
.tool-card .tagline {
  color: var(--fg-muted);
  font-size: 0.93rem;
  margin: 0;
}

.empty {
  color: var(--fg-muted);
  text-align: center;
  padding: 3rem 0;
}

/* About / prose */
.prose {
  max-width: 65ch;
}
.prose h1 {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin: 0 0 1rem;
}
.prose h2 {
  font-size: 1.2rem;
  font-weight: 800;
  margin: 2.25rem 0 0.75rem;
  letter-spacing: -0.01em;
}
.prose p {
  margin: 0 0 1rem;
  color: var(--fg);
}
.prose .lede {
  font-size: 1.15rem;
  color: var(--fg-muted);
  margin-bottom: 1.5rem;
}

.tool-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
  border-top: 1px solid var(--border);
}
.tool-list li {
  display: grid;
  grid-template-columns: minmax(140px, max-content) 1fr;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
}
.tool-list strong {
  font-weight: 700;
}
.tool-list-desc {
  color: var(--fg-muted);
}

.repo-link {
  display: inline-block;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--border-strong);
  border-radius: 9999px;
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, monospace;
  font-size: 0.92rem;
  word-break: break-all;
}
.repo-link:hover {
  background: var(--bg-hover);
  text-decoration: none;
}

/* Footer */
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 880px;
  margin: 0 auto;
  width: 100%;
  padding: 1.5rem;
  color: var(--fg-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

@media (max-width: 600px) {
  .site-header {
    padding: 0.5rem 1rem;
  }
  .site-nav a {
    padding: 0.4rem 0.6rem;
    font-size: 0.9rem;
  }
  .site-main {
    padding: 2rem 1rem 3rem;
  }
  .hero h1 {
    font-size: 2rem;
  }
  .tool-list li {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}
