:root {
  --bg: #ffffff;
  --fg: #0f0f0f;
  --muted: #6b6b6b;
  --card-bg: #fafafa;
  --border: #e6e6e6;
  --accent: #2563eb;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0b;
    --fg: #f5f5f5;
    --muted: #a1a1a1;
    --card-bg: #151515;
    --border: #2a2a2a;
    --accent: #60a5fa;
  }
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
  font-size: 16px;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
}

header {
  padding-top: 3rem;
  padding-bottom: 1.5rem;
}

h1 {
  margin: 0 0 0.25rem 0;
  font-size: clamp(1.8rem, 2.8vw, 2.6rem);
  font-weight: 600;
  letter-spacing: -0.01em;
}

h2 {
  margin: 2rem 0 0.75rem 0;
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.subtitle {
  margin: 0 0 0.25rem 0;
  color: var(--fg);
  opacity: 0.9;
}

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

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  padding: 1.25rem;
  box-shadow: 0 1px 0 rgba(0,0,0,0.01);
}

.big {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.muted {
  margin: 0.5rem 0 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.small {
  font-size: 0.85rem;
}

.timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  padding: 1rem 1.25rem;
}

.item-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.item-title {
  margin: 0;
  font-weight: 600;
}

.item-date {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.item-note {
  margin: 0.35rem 0 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.since-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.since-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem 1rem;
  border-radius: calc(var(--radius) - 4px);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, transparent 0%, rgba(255,255,255,0.01) 100%);
}

.since-label {
  margin: 0;
  font-weight: 600;
  line-height: 1.25;
}

.since-time {
  margin: 0;
  font-size: clamp(1.25rem, 4vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
}

.since-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (min-width: 640px) {
  .since-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.footer {
  padding-top: 2rem;
  padding-bottom: 3rem;
  color: var(--muted);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  background: transparent;
  color: var(--muted);
  font-size: 0.9rem;
}