:root {
  --color-bg:           #fafaf8;
  --color-surface:      #ffffff;
  --color-text:         #1a1a1a;
  --color-muted:        #6b7280;
  --color-border:       #e5e7eb;
  --color-accent:       #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-orange:       #e8541a;

  --font-body: 'Noto Sans', sans-serif;
  --font-ui:   'Noto Sans', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  --width-content: 860px;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
}

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

html {
  font-size: 18px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  width: 100%;
  max-width: var(--width-content);
  margin-inline: auto;
  padding: var(--space-lg) var(--space-md);
}

img, video {
  max-width: 100%;
  display: block;
  margin-inline: auto;
}

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

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

ul, ol {
  padding-left: var(--space-lg);
  margin-bottom: var(--space-md);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-ui);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}

h1 { font-size: 2.2rem; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.25rem; }

h1 + h2, h2 + h3 { margin-top: var(--space-sm); }

p {
  margin-bottom: var(--space-md);
}

blockquote {
  border-left: 3px solid var(--color-accent);
  margin-left: 0;
  padding: var(--space-sm) var(--space-md);
  color: var(--color-muted);
  font-style: italic;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-border);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

pre {
  padding: var(--space-md);
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: var(--space-md);
  font-size: 0.9rem;
  line-height: 1.5;
}

pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: var(--space-xl);
}

table {
  border-collapse: collapse;
  margin-bottom: var(--space-md);
}

th, td {
  border: 1px solid var(--color-border);
  padding: 4px 10px;
  text-align: left;
}

th {
  font-weight: bold;
}

/* --- Site header + nav --- */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-md);
  display: flex;
  align-items: baseline;
  gap: var(--space-lg);
  max-width: var(--width-content);
  margin-inline: auto;
  width: 100%;
}

.site-header__title {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.site-header__title a {
  color: var(--color-text);
  text-decoration: none;
}

.site-nav {
  margin-left: auto;
  display: flex;
  gap: var(--space-md);
  font-family: var(--font-ui);
  font-size: 0.95rem;
}

.site-nav a {
  color: var(--color-text);
  text-decoration: none;
}

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

footer {
  color: var(--color-muted);
  text-align: right;
  padding: var(--space-md);
  border-top: 1px solid var(--color-border);
  font-size: 0.9rem;
}

/* --- Homepage post list --- */
.post-list {
  list-style: none;
  padding-left: 0;
}

.post-list__item {
  margin-bottom: var(--space-sm);
  display: flex;
  gap: var(--space-md);
  align-items: baseline;
}

.post-list__date {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-muted);
  min-width: 6.5rem;
}

/* --- Single-post meta --- */
.post-meta {
  margin-bottom: var(--space-lg);
}

.post-meta h1 {
  margin-top: 0;
  margin-bottom: var(--space-xs);
}

.post-meta__date {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* --- Dark mode --- */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:           #2f2f2f;
    --color-surface:      #383838;
    --color-text:         #e0ddd8;
    --color-muted:        #9a9690;
    --color-border:       #444440;
    --color-accent:       #7aa2d4;
    --color-accent-hover: #9ab8e0;
    --color-orange:       #d45f30;
  }

  code {
    background: #3a3a3a;
  }
}