:root {
  color-scheme: light;
  --paper: #ffffff;
  --panel: #f7f7f7;
  --ink: #171717;
  --muted: #666666;
  --line: #d5d5d5;
  --accent: #0000ee;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

html.dark,
body.dark {
  color-scheme: dark;
  --paper: #1a1a1a;
  --panel: #222222;
  --ink: #eeeeee;
  --muted: #aaaaaa;
  --line: #555555;
  --accent: #66b3ff;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--paper);
}

body {
  min-height: 100dvh;
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 18px/1.68 var(--sans);
}

html.theme-ready body {
  transition: background 180ms ease, color 180ms ease;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.post-toolbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  min-height: calc(56px + env(safe-area-inset-top));
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: env(safe-area-inset-top) max(16px, env(safe-area-inset-right)) 0 max(16px, env(safe-area-inset-left));
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 96%, transparent);
  backdrop-filter: blur(14px);
}

.home-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--muted);
  font: 800 12px/1 var(--mono);
  text-decoration: none;
}

.theme-toggle {
  display: inline-flex;
  min-width: 78px;
  min-height: 44px;
  gap: 7px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 0 10px;
  background: var(--panel);
  color: var(--ink);
  font: 750 12px/1 var(--mono);
  cursor: pointer;
}

.theme-toggle [data-theme-icon] {
  font-size: 18px;
}

.post-main {
  width: min(100% - 32px, 680px);
  margin: 0 auto;
  padding: 54px 0 72px;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 5px 12px;
  margin: 0 0 14px;
  color: var(--muted);
  font: 12px/1.45 var(--mono);
}

.post-title {
  margin: 0 0 28px;
  font-size: clamp(32px, 6vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.post-body p {
  margin: 0 0 22px;
}

.post-body p:first-child {
  font-size: 20px;
}

@media (max-width: 480px) {
  body {
    font-size: 17px;
  }

  .post-main {
    width: min(100% - 28px, 680px);
    padding-top: 36px;
  }

  .post-title {
    font-size: 31px;
  }

  .theme-toggle {
    min-width: 72px;
  }
}