:root {
  color-scheme: light dark;
  --paper: #f7f8fa;
  --ink: #1a1d21;
  --muted: #5c6570;
  --accent: #0f6f5c;
  --border: #e6e9ee;
  --shadow: rgba(15, 17, 26, 0.08);
  --max-width: 780px;
  --radius: 18px;
  --bg-gradient: radial-gradient(circle at top, #ffffff, #f7f8fa 55%, #f0f2f5);
}

/* Dark applies when the reader picks it with the toggle, or when their system
   asks for it and they haven't chosen otherwise. */
:root[data-theme="dark"] {
  --paper: #0e1116;
  --ink: #e8eaed;
  --muted: #9aa4b0;
  --accent: #7dd3c7;
  --border: #262c34;
  --shadow: rgba(0, 0, 0, 0.45);
  --bg-gradient: radial-gradient(circle at top, #1d222a, #0e1116 55%, #0a0d11);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0e1116;
    --ink: #e8eaed;
    --muted: #9aa4b0;
    --accent: #7dd3c7;
    --border: #262c34;
    --shadow: rgba(0, 0, 0, 0.45);
    --bg-gradient: radial-gradient(circle at top, #1d222a, #0e1116 55%, #0a0d11);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Spectral", "Times New Roman", serif;
  background: var(--bg-gradient);
  color: var(--ink);
  line-height: 1.7;
}

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

a:hover {
  text-decoration: underline;
}

.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.brand__title {
  font-family: "Space Grotesk", "Gill Sans", sans-serif;
  font-size: 28px;
  font-weight: 600;
  color: var(--ink);
}

.brand__subtitle {
  color: var(--muted);
  font-size: 16px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: "Space Grotesk", "Gill Sans", sans-serif;
}

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--paper);
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 14px;
  font-family: inherit;
  cursor: pointer;
  box-shadow: 0 8px 20px var(--shadow);
}

.intro {
  padding: 28px 0 10px;
  font-size: 18px;
  color: var(--muted);
}

.post-list {
  display: grid;
  gap: 24px;
  padding-top: 16px;
}

.post-list__item {
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: 0 12px 40px var(--shadow);
}

.post-list__meta {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-family: "Space Grotesk", "Gill Sans", sans-serif;
}

.post-list__item h3 {
  margin: 10px 0 8px;
  font-size: 22px;
}

.post-list__item p {
  margin: 0;
  color: var(--muted);
}

.post {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-top: 24px;
  box-shadow: 0 16px 50px var(--shadow);
}

.post__header {
  margin-bottom: 24px;
}

.post__meta {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-family: "Space Grotesk", "Gill Sans", sans-serif;
}

h1,
h2,
h3 {
  font-family: "Space Grotesk", "Gill Sans", sans-serif;
  color: var(--ink);
}

blockquote {
  margin: 28px 0;
  padding: 18px 22px;
  border-left: 4px solid var(--accent);
  background: rgba(15, 111, 92, 0.08);
  font-style: italic;
}

ul {
  padding-left: 20px;
}

.site-footer {
  margin-top: 48px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 700px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .post {
    padding: 24px;
  }
}