/* ============================================================
   avons.github.io — shared base styles
   style.css · v1.0
   ============================================================ */

/* ── Variables ── */
:root {
  --black:       #0a0a0a;
  --off-black:   #1a1a1a;
  --dark-grey:   #333333;
  --mid-grey:    #555555;
  --light-grey:  #999999;
  --rule:        #e0e0e0;
  --soft-bg:     #f8f8f8;
  --bg:          #fafaf8;
  --white:       #ffffff;

  /* Accent — red (warn callout) */
  --accent-red:       #8b1a1a;
  --accent-red-light: #fdf0f0;

  /* Accent — green (insight callout) */
  --accent-green:       #4a9068;
  --accent-green-light: #eef4f0;
  --accent-green-text:  #1d3d2a;

  /* Dark mode transition */
  color-scheme: light dark;
}

/* ── Dark Mode ── */
html.dark body {
  --black:       #e0e0e0; /* Off-white text */
  --off-black:   #d1d1d1;
  --dark-grey:   #b0b0b0;
  --mid-grey:    #888888;
  --light-grey:  #666666;
  --rule:        #333333; /* Subtle border */
  --soft-bg:     #242424; /* Lighter charcoal */
  --bg:          #1a1a1a; /* Base charcoal */
  --white:       #2a2a2a; /* Card surface */

  /* Accent — red dark mode (softened) */
  --accent-red:       #e05a4a;
  --accent-red-light: #2d1a1a;

  /* Accent — green dark mode (softened) */
  --accent-green:       #5aaa7a;
  --accent-green-light: #1a241e;
  --accent-green-text:  #c8e8d4;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* ── Base ── */
body {
  font-family: "Lora", Georgia, serif;
  background: var(--bg);
  color: var(--black);
  line-height: 1.8;
}

/* ── Typography ── */
h1 {
  font-family: "DM Serif Display", Georgia, serif;
  font-weight: 700;
  color: var(--black);
  letter-spacing: -0.02em;
  line-height: 1.1;
}
h2 {
  font-family: "DM Serif Display", Georgia, serif;
  font-weight: 700;
  color: var(--black);
  letter-spacing: -0.01em;
}
h3 {
  font-family: "Source Serif 4", serif;
  font-weight: 600;
  color: var(--mid-grey);
  font-style: italic;
}
p { margin-bottom: 14px; }
a { color: var(--black); font-weight: 600; text-decoration: none; transition: color 0.15s, opacity 0.15s; }
a:hover { text-decoration: none; opacity: 0.7; }
strong { color: var(--black); }
code {
  font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
  font-size: 0.86em;
  background: var(--soft-bg);
  border: 1px solid var(--rule);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--dark-grey);
}

/* ── Masthead ── */
.masthead {
  border-bottom: 3px solid var(--black);
  padding: 0 64px;
}
.masthead-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0 20px;
  border-bottom: 1px solid var(--rule);
}
.site-name {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--black);
}
.logo-img { height: 56px; width: auto; object-fit: contain; }
.logo-text {
  font-family: "DM Serif Display", Georgia, serif;
  font-size: clamp(1.4rem, 4vw, 2.2rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--black);
}
.logo-text strong { font-weight: 700; }
.masthead-meta { text-align: right; }
.masthead-meta p {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  color: var(--light-grey);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.8;
}
.masthead-nav {
  display: flex;
  gap: 32px;
  padding: 14px 0;
  align-items: center;
}
.masthead-nav a {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dark-grey);
  text-decoration: none;
  transition: color 0.15s;
}
.masthead-nav a:hover { color: var(--black); }
.masthead-tagline {
  font-family: "Source Serif 4", serif;
  font-style: italic;
  font-size: 0.88rem;
  color: var(--light-grey);
  margin-left: auto;
}

/* ── Footer ── */
.site-footer {
  border-top: 3px solid var(--black);
  padding: 48px 64px;
  text-align: center;
  background: var(--bg);
}
.site-footer p {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
  color: var(--light-grey);
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}
.site-footer a {
  color: var(--mid-grey);
  text-decoration: none;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
}
.site-footer a:hover { color: var(--black); opacity: 1; }
.footer-links { display: flex; gap: 24px; justify-content: center; margin-bottom: 12px; }

/* ── Utility ── */
.section-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--light-grey);
  margin-bottom: 24px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
}

/* ── Responsive ── */
@media (max-width: 860px) {
  .masthead { padding: 0 24px; }
  .site-footer { padding: 24px; flex-direction: column; }
  .masthead-meta { display: none; }
}

/* ============================================================
   Shared header + footer components
   ============================================================ */

/* ── Font import note: add to each HTML <head>
   https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,500;0,600;1,400;1,500&family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;1,400&family=JetBrains+Mono:wght@400;500&display=swap
── */

/* ── Shared site header ── */
.site-header {
  border-bottom: 3px solid var(--black);
  padding: 0 64px;
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}
.site-header-nav {
  display: flex;
  gap: 28px;
  padding: 10px 0;
  align-items: center;
}
.site-header-nav a {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dark-grey);
  text-decoration: none;
  transition: color 0.15s;
}
.site-header-nav a:hover { color: var(--black); text-decoration: none; }
.site-header-nav .back-link {
  display: flex;
  align-items: center;
  gap: 6px;
}
.site-header-nav .back-link::before {
  content: "←";
  font-size: 0.9rem;
}
.nav-divider {
  width: 1px;
  height: 14px;
  background: var(--rule);
}
.site-tagline {
  font-family: "Lora", Georgia, serif;
  font-style: italic;
  font-size: 0.85rem;
  color: var(--light-grey);
  margin-left: auto;
}

/* ── Dark mode toggle button (site headers) ── */
.theme-toggle {
  background: none;
  border: 1px solid var(--rule);
  border-radius: 3px;
  color: var(--mid-grey);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
  flex-shrink: 0;
}
.theme-toggle:hover {
  border-color: var(--dark-grey);
  color: var(--black);
}

/* ── Shared site footer ── */
.site-footer-links {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.site-footer-links a {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  color: var(--mid-grey);
  text-decoration: none;
  letter-spacing: 0.04em;
  font-weight: 400;
}
.site-footer-links a:hover { color: var(--black); text-decoration: none; }
.site-footer-meta {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
  color: var(--light-grey);
  letter-spacing: 0.03em;
  line-height: 1.9;
}
.site-footer-meta a {
  color: var(--light-grey);
  text-decoration: none;
}
.site-footer-meta a:hover { color: var(--mid-grey); }

/* ── Article footer ── */
.site-footer-article {
  border-top: 3px solid var(--black);
  padding: 32px 64px;
  text-align: center;
  background: var(--bg);
}
.article-attribution {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  color: var(--mid-grey);
  letter-spacing: 0.04em;
  margin-bottom: 16px;
  line-height: 1.6;
}

/* ── Responsive ── */
@media (max-width: 860px) {
  .site-header  { padding: 0 20px; position: static; }
  .site-footer  { padding: 28px 20px; }
  .site-footer-article  { padding: 28px 20px; }
  .site-header-nav .site-tagline { display: none; }
}