/* ============================================================
   Borkster — main.css
   Handwritten CSS, no frameworks.
   Palette: off-white bg, near-black text, slate blue accent.
   ============================================================ */

/* ------------------------------------------------------------
   Custom Properties
   ------------------------------------------------------------ */
:root {
  --bg:         #f8f7f4;
  --bg-alt:     #f0efe9;
  --text:       #1a1a1a;
  --text-muted: #6b7280;
  --accent:     #4a7c9e;
  --accent-dim: #3a6a8a;
  --border:     #dddbd5;

  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
               Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", ui-monospace,
               "SFMono-Regular", Menlo, Consolas, monospace;

  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2.5rem;
  --space-xl:  4rem;

  --max-width:        72rem;
  --max-width-prose:  65ch;
  --radius:           3px;
}

/* ------------------------------------------------------------
   Reset & Base
   ------------------------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%; /* 16px base */
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1.0625rem;   /* ~17px */
  line-height: 1.75;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
}

p,
h1,
h2,
h3,
h4,
blockquote,
ul,
ol,
pre,
figure {
  overflow-wrap: break-word;
}

/* ------------------------------------------------------------
   Typography
   ------------------------------------------------------------ */

/* Google Fonts: Inter */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--text);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.15rem; }

p + p {
  margin-top: var(--space-sm);
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 3px;
  transition: text-decoration-color 0.15s ease;
}

a:hover,
a:focus-visible {
  text-decoration-color: var(--accent);
}

strong {
  font-weight: 600;
}

em {
  font-style: italic;
}

code,
kbd,
samp {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.1em 0.35em;
}

pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-md);
  overflow-x: auto;
  line-height: 1.6;
}

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

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

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

li + li {
  margin-top: 0.35rem;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--space-lg) 0;
}

/* ------------------------------------------------------------
   Layout — Container
   ------------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.container--narrow {
  max-width: var(--max-width-prose);
}

/* ------------------------------------------------------------
   Site Header
   ------------------------------------------------------------ */
.site-header {
  border-bottom: 1px solid var(--border);
  padding-block: var(--space-md);
}

.site-header .container {
  display: flex;
  align-items: baseline;
  gap: var(--space-lg);
}

.site-title {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.site-title:hover,
.site-title:focus-visible {
  color: var(--accent);
  text-decoration-color: transparent;
}

.site-nav {
  display: flex;
  gap: var(--space-md);
}

.site-nav a {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: color 0.15s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent);
}

/* ------------------------------------------------------------
   Main Content
   ------------------------------------------------------------ */
main {
  flex: 1;
  padding-block: var(--space-xl);
}

/* ------------------------------------------------------------
   Home Page
   ------------------------------------------------------------ */
.home-intro {
  margin-bottom: var(--space-xl);
}

.home-tagline {
  font-size: 1.125rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Post list on home page */
.post-list__items {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.post-list__item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.post-list__date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.post-list__link {
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  transition: color 0.15s ease;
}

.post-list__link:hover,
.post-list__link:focus-visible {
  color: var(--accent);
}

/* ------------------------------------------------------------
   Post
   ------------------------------------------------------------ */
.post .container {
  margin-inline: auto;
}

.post-header {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border);
}

.post-title {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  line-height: 1.15;
  margin-top: 0;
}

.post-date {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: var(--space-xs);
}

.post-content {
  line-height: 1.8;
}

.post-content h2,
.post-content h3,
.post-content h4 {
  margin-top: var(--space-xl);
}

.post-content p:first-child {
  margin-top: 0;
}

/* ------------------------------------------------------------
   About Page
   ------------------------------------------------------------ */
.about .container {
  margin-inline: auto;
}

.about h1 {
  margin-top: 0;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
}

.about p + p {
  margin-top: var(--space-sm);
}

/* ------------------------------------------------------------
   Site Footer
   ------------------------------------------------------------ */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

/* ------------------------------------------------------------
   Responsive — Mobile First
   ------------------------------------------------------------ */
@media (max-width: 40rem) {
  :root {
    --space-xl: 2.5rem;
    --space-lg: 1.75rem;
  }

  body {
    font-size: 1rem;
  }

  .site-header .container {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .post-title {
    font-size: 1.5rem;
  }

  main {
    padding-block: var(--space-lg);
  }
}

/* ------------------------------------------------------------
   Accessibility
   ------------------------------------------------------------ */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:         #151512;
    --bg-alt:     #1e1d1a;
    --text:       #e8e6e1;
    --text-muted: #9ca3af;
    --accent:     #6fa3c4;
    --accent-dim: #5a8faf;
    --border:     #2e2d29;
  }
}