:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b7280;
  --border: #e5e7eb;
  --subtle-bg: #f9fafb;
  --accent: #2563eb;

  --updated-bg: #eff6ff;
  --updated-fg: #1d4ed8;
  --fixed-bg: #ecfdf5;
  --fixed-fg: #047857;
  --qa-bg: #fef3c7;
  --qa-fg: #92400e;
  --new-bg: #f3e8ff;
  --new-fg: #6b21a8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f17;
    --fg: #e5e7eb;
    --muted: #9ca3af;
    --border: #1f2937;
    --subtle-bg: #111827;

    --updated-bg: #1e3a8a33;
    --updated-fg: #93c5fd;
    --fixed-bg: #065f4633;
    --fixed-fg: #6ee7b7;
    --qa-bg: #78350f33;
    --qa-fg: #fcd34d;
    --new-bg: #581c8733;
    --new-fg: #d8b4fe;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}

.site-header h1 {
  font-size: 2.25rem;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}

.tagline {
  color: var(--muted);
  margin: 0;
  font-size: 1.05rem;
}

main {
  padding-bottom: 80px;
}

.entry-day {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.entry-day:last-child {
  border-bottom: none;
}

.date {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 20px;
}

.subsection {
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
  margin: 28px 0 12px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
}

.entry {
  display: flex;
  gap: 16px;
  padding: 12px 0;
  align-items: flex-start;
}

.entry-body {
  flex: 1;
  min-width: 0;
}

.entry-body h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 4px;
  line-height: 1.4;
}

.entry-body p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.tag {
  display: inline-block;
  flex-shrink: 0;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: 999px;
  min-width: 68px;
  text-align: center;
  margin-top: 2px;
}

.tag-updated { background: var(--updated-bg); color: var(--updated-fg); }
.tag-fixed   { background: var(--fixed-bg);   color: var(--fixed-fg); }
.tag-qa      { background: var(--qa-bg);      color: var(--qa-fg); }
.tag-new     { background: var(--new-bg);     color: var(--new-fg); }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

.site-footer p { margin: 0; }

.status {
  text-align: center;
  color: var(--muted);
  padding: 40px 0;
  font-size: 0.95rem;
}

@media (max-width: 600px) {
  .site-header { padding: 40px 0 24px; }
  .site-header h1 { font-size: 1.75rem; }
  .entry {
    flex-direction: column;
    gap: 8px;
  }
  .tag { align-self: flex-start; }
}