/* Mailing List Archive - Dark/Light Theme */
:root, [data-theme="dark"] {
  --bg-primary: #08080d;
  --bg-card: #101018;
  --bg-card-hover: #181824;
  --border: #252535;
  --text-primary: #e8e8f0;
  --text-secondary: #8888a0;
  --text-label: #6a6a82;
  --accent: #e03e3e;
  --accent-glow: rgba(224, 62, 62, 0.12);
  --accent-blue: #4a80c8;
  --grid-opacity: 0.015;
  --font-display: 'Chakra Petch', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

[data-theme="light"] {
  --bg-primary: #f0f0f4;
  --bg-card: #ffffff;
  --bg-card-hover: #f8f8fc;
  --border: #d0d0da;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a64;
  --text-label: #7a7a90;
  --accent: #c23535;
  --accent-glow: rgba(194, 53, 53, 0.08);
  --accent-blue: #3568a8;
  --grid-opacity: 0.04;
}

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

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-weight: 300;
  line-height: 1.6;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(128,128,128,var(--grid-opacity)) 1px, transparent 1px),
    linear-gradient(90deg, rgba(128,128,128,var(--grid-opacity)) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

.page-wrapper {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 60px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}

.site-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-decoration: none;
}

.site-title span { color: var(--accent); }
.site-title:hover { color: var(--text-primary); }

.header-nav {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.header-btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text-secondary);
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-card);
  cursor: pointer;
  transition: all 0.2s ease;
}

.header-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent);
  background: var(--accent-glow);
}

.nav-sep {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 4px;
}

.search-box { margin-bottom: 24px; }

.search-box input {
  width: 100%;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 300;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s ease;
}

.search-box input:focus {
  border-color: var(--accent);
}

.search-box input::placeholder {
  color: var(--text-label);
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-label);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--accent);
  text-decoration: none;
}

.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { margin: 0 6px; color: var(--text-label); }

h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.2;
  margin-bottom: 12px;
}

h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-label);
  margin: 28px 0 12px;
}

.subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.empty {
  font-size: 13px;
  color: var(--text-label);
  font-style: italic;
  padding: 20px 0;
}

.card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 20px;
  margin-bottom: 8px;
  text-decoration: none;
  color: var(--text-primary);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
}

.card-highlight {
  border-color: rgba(224, 62, 62, 0.3);
  background: var(--accent-glow);
}

.card-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
}

.card-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-label);
}

.card-arrow {
  font-size: 14px;
  color: var(--text-label);
}

.msg-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px 20px;
  margin-bottom: 8px;
  text-decoration: none;
  color: var(--text-primary);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.msg-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
}

.msg-card-subject {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 4px;
}

.msg-card-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-label);
  margin-bottom: 6px;
}

.msg-card-snippet {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.msg-card-folder {
  color: var(--accent-blue);
}

.message h1 {
  font-size: clamp(20px, 3vw, 28px);
  margin-bottom: 16px;
}

.msg-meta {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 16px;
  margin-bottom: 24px;
}

.msg-meta-row {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 3px 0;
}

.msg-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-label);
  display: inline-block;
  width: 50px;
}

.msg-body {
  white-space: pre-wrap;
  word-wrap: break-word;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px;
  margin-bottom: 24px;
  overflow-x: auto;
}

.site-footer {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.site-footer p {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-label);
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

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

.site-footer a:hover { text-decoration: underline; }

@media (max-width: 600px) {
  .page-wrapper { padding: 0 16px 40px; }
  .msg-body { padding: 14px; font-size: 12px; }
}