/* Q-day Clock — accessible static stylesheet.
 *
 * Design goals:
 *   - WCAG 2.1 AA target (per plan §E)
 *   - Okabe-Ito + grayscale palette (color-blind safe)
 *   - No external fonts, no analytics, no JS dependencies
 *   - Works with JavaScript disabled (symbolic-clock page is static SVG)
 *   - Readable at 200% browser zoom
 *
 * Palette:
 *   #d55e00  Okabe-Ito vermillion  (clock hand, primary accent)
 *   #0072b2  Okabe-Ito blue        (links)
 *   #111111  near-black text
 *   #555555  secondary label text
 *   #f7f7f7  near-white background
 *   #e4e4e4  rule / divider
 */

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

html {
  font-size: 100%;
}

body {
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  max-width: 44rem;
  background: #ffffff;
  color: #111111;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.55;
}

header {
  border-bottom: 1px solid #e4e4e4;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
}

header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

header .tagline {
  margin: 0;
  color: #555555;
  font-size: 1rem;
}

main {
  display: block;
}

footer {
  margin-top: 3rem;
  border-top: 1px solid #e4e4e4;
  padding-top: 1rem;
  color: #555555;
  font-size: 0.875rem;
}

a {
  color: #0072b2;
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover,
a:focus {
  color: #d55e00;
  outline-offset: 2px;
}

a:focus-visible {
  outline: 2px solid #d55e00;
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- Clock landing page ---------- */

section.clock {
  display: flex;
  justify-content: center;
  margin: 1rem 0 1.5rem;
}

section.clock svg {
  max-width: 100%;
  height: auto;
}

section.reading {
  text-align: center;
  margin: 0 0 2rem;
}

section.reading .hour {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  letter-spacing: 0.01em;
}

section.reading .verbal {
  margin: 0 auto;
  max-width: 36rem;
  color: #333333;
}

section.meta {
  margin: 0 0 2rem;
  border: 1px solid #e4e4e4;
  border-radius: 4px;
  padding: 0.75rem 1rem;
  background: #f7f7f7;
}

section.meta ul {
  margin: 0;
  padding-left: 1.25rem;
}

section.meta li {
  margin: 0.25rem 0;
}

section.links {
  margin: 1.5rem 0 0;
  font-size: 0.95rem;
  color: #333333;
}

section.links p {
  margin: 0.35rem 0;
}

/* ---------- Methodology page ---------- */

section.methodology .callout {
  border-left: 4px solid #d55e00;
  background: #fff5ec;
  padding: 0.75rem 1rem;
  margin: 0 0 1.5rem;
  color: #111111;
}

pre.methodology-body {
  white-space: pre-wrap;
  word-wrap: break-word;
  background: #f7f7f7;
  border: 1px solid #e4e4e4;
  border-radius: 4px;
  padding: 1rem;
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: #111111;
}

/* ---------- About page ---------- */

section.about h2 {
  margin-top: 1.75rem;
  font-size: 1.25rem;
  font-weight: 600;
}

section.about h3 {
  margin-top: 1.25rem;
  font-size: 1.05rem;
  font-weight: 600;
}

section.about code,
section.about pre {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

section.about pre {
  background: #f7f7f7;
  border: 1px solid #e4e4e4;
  border-radius: 4px;
  padding: 0.75rem 1rem;
  overflow-x: auto;
  font-size: 0.875rem;
}

section.about pre.pubkey {
  word-break: break-all;
  white-space: pre-wrap;
}

/* ---------- Print ---------- */

@media print {
  body {
    max-width: none;
    color: #000000;
  }
  a {
    color: #000000;
    text-decoration: underline;
  }
  footer,
  section.links {
    color: #333333;
  }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---------- Dark mode (system preference) ---------- */

@media (prefers-color-scheme: dark) {
  body {
    background: #111111;
    color: #f0f0f0;
  }
  header,
  footer {
    border-color: #333333;
  }
  header .tagline,
  footer,
  section.reading .verbal,
  section.links {
    color: #cccccc;
  }
  section.meta {
    background: #1c1c1c;
    border-color: #333333;
  }
  section.methodology .callout {
    background: #2a1a0a;
  }
  pre.methodology-body,
  section.about pre {
    background: #1c1c1c;
    border-color: #333333;
    color: #f0f0f0;
  }
  a {
    color: #56b4e9;  /* Okabe-Ito sky-blue, higher contrast on dark */
  }
  a:hover,
  a:focus {
    color: #f0e442;  /* Okabe-Ito yellow */
  }
}