/* --- Variables & System Logic --- */
:root {
  color-scheme: light dark;
  /* Light Mode Palette */
  --bg: #ffffff;
  --fg: #1a1a1a;
  --accent: #0000ff; /* Classic HTML blue */
  --border: #000000;
  --code-bg: #f4f4f4;
  --meta: #666666;
  --max-width: 800px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d0d;
    --fg: #e0e0e0;
    --accent: #4dabff;
    --border: #333333;
    --code-bg: #1a1a1a;
    --meta: #999999;
  }
}

/* --- Layout Architecture --- */
* { box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, monospace;
  line-height: 1.6;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
  text-rendering: optimizeLegibility;
}

/* --- Navigation & Footer --- */
nav ul { list-style: none; padding: 0; display: flex; gap: 1rem; border-bottom: 4px solid var(--fg); padding-bottom: 0.5rem; }
nav a { text-transform: uppercase; font-weight: 900; text-decoration: none; }
nav a:hover { background: var(--fg); color: var(--bg); }

footer { margin-top: 4rem; border-top: 1px solid var(--border); padding-top: 1rem; font-size: 0.8rem; text-transform: uppercase; }

/* --- Typography (Brutalist) --- */
h1, h2, h3 { line-height: 1.1; margin-top: 2rem; font-weight: 900; text-transform: uppercase; }
h1 { font-size: 2.2rem; margin-bottom: 1rem; }
h2 { border-left: 10px solid var(--accent); padding-left: 0.75rem; }

a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
a:hover { background: var(--accent); color: var(--bg); text-decoration: none; }

/* --- Weblorg / Template Specifics --- */
section b { display: block; font-size: 0.7rem; text-transform: uppercase; color: var(--meta); margin-top: 0.5rem; }

.post { display: flex; justify-content: space-between; border-bottom: 1px dashed var(--border); padding: 0.5rem 0; }
.post time { font-size: 0.8rem; color: var(--meta); }

/* --- Org-Mode Tables (Heavy Grid) --- */
table { width: 100%; border-collapse: collapse; margin: 2rem 0; border: 3px solid var(--fg); }
th, td { border: 1px solid var(--fg); padding: 0.75rem; text-align: left; }
th { background: var(--fg); color: var(--bg); text-transform: uppercase; font-size: 0.8rem; }

/* --- Code & Pre blocks --- */
pre { padding: 1rem; border: 1px solid var(--border); background: var(--code-bg); overflow-x: auto; }
code { background: var(--code-bg); padding: 0.2rem 0.4rem; }

/* --- Accessibility & Efficiency --- */
img { max-width: 100%; height: auto; filter: grayscale(1); }
img:hover { filter: grayscale(0); }

/* --- Accessibility: Skip Link --- */
.skip-link {
    position: absolute;
    top: -100px; /* Hide off-screen */
    left: 50%;
    transform: translateX(-50%);
    background: var(--fg);
    color: var(--bg);
    padding: 1rem 2rem;
    z-index: 999;
    font-weight: 900;
    text-transform: uppercase;
    border: 3px solid var(--accent);
    text-decoration: none;
    transition: top 0.2s ease-in-out;
}

/* Show the link when a user tabs to it */
.skip-link:focus {
    top: 0;
    outline: none; /* We use the border and color change as the indicator */
}

/* Ensure the main area doesn't show a blue ring when focused via skip-link */
#main-content:focus {
    outline: none;
}

/* --- Footnote Alignment --- */
.footdef {
    display: flex;
    align-items: flex-start; /* Keeps number at the top if text wraps */
    gap: 1rem;               /* Space between number and text */
    margin-bottom: 0.5rem;
}

/* Ensure the paragraph doesn't add its own block margins */
.footpara {
    margin: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Style the footnote number to be a fixed width for alignment */
.footnum {
    font-weight: bold;
    min-width: 1.5rem;
    text-align: right;
    text-decoration: none;
    font-size: 0.85rem;
    color: var(--accent);
}

@media (max-width: 600px) {
    body { padding: 1rem; }
    .post { flex-direction: column; }
}