:root {
  color-scheme: light dark;
  --bg: #f6f6f8;
  --card: #ffffff;
  --card-hover: #fbfbfc;
  --text: #1b1d21;
  --muted: #6b7078;
  --faint: #8a8f97;
  --accent: #2454ff;
  --accent-hover: #1c44e0;
  --accent-text: #ffffff;
  --border: #e4e5e8;
  --shadow: 0 1px 2px rgba(20, 21, 26, 0.04), 0 8px 24px rgba(20, 21, 26, 0.05);
  --radius: 14px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16171b;
    --card: #1e1f24;
    --card-hover: #232429;
    --text: #f1f1f3;
    --muted: #9a9ea6;
    --faint: #6f747c;
    --accent: #6690ff;
    --accent-hover: #85a5ff;
    --accent-text: #10142b;
    --border: #303237;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 8px 24px rgba(0, 0, 0, 0.28);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  display: flex;
  justify-content: center;
  padding: 64px 20px;
  line-height: 1.5;
}

main {
  width: 100%;
  max-width: 560px;
}

.page-header { margin-bottom: 32px; }

.eyebrow {
  margin: 0 0 6px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
}

h1 {
  font-size: 1.6rem;
  font-weight: 650;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.sub {
  color: var(--muted);
  margin: 0;
  font-size: 0.925rem;
  max-width: 46ch;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}

.loading, .empty {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}

.latest-card { margin-bottom: 40px; }

.badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border-radius: 999px;
  padding: 3px 10px;
}

.latest-top {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}

.latest-version {
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.latest-date {
  color: var(--muted);
  font-size: 0.85rem;
}

.latest-notes {
  margin: 10px 0 20px;
  color: var(--muted);
  font-size: 0.9rem;
  white-space: pre-line;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: var(--accent-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 22px;
  border-radius: 10px;
  transition: background-color 0.15s ease;
}

.download-btn:hover { background: var(--accent-hover); }
.download-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.hash-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  font-size: 0.8rem;
  color: var(--faint);
}

.hash-label { color: var(--muted); }

.hash-value {
  font-family: var(--mono);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 200px;
}

.copy-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 7px;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 9px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
  flex-shrink: 0;
}

.copy-btn:hover { border-color: var(--accent); color: var(--accent); }
.copy-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.copy-btn[data-copied="true"] { border-color: var(--accent); color: var(--accent); }

.history-section h2 {
  font-size: 0.8rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0 0 12px;
}

.history-list {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
  box-shadow: var(--shadow);
}

details.history-item {
  border-top: 1px solid var(--border);
}

details.history-item:first-child { border-top: none; }

details.history-item summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: background-color 0.15s ease;
}

details.history-item summary::-webkit-details-marker { display: none; }

details.history-item summary:hover { background: var(--card-hover); }
details.history-item summary:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.summary-left {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.item-version { font-weight: 600; font-size: 0.92rem; }
.item-date { color: var(--muted); font-size: 0.82rem; }

.chevron {
  color: var(--faint);
  transition: transform 0.15s ease;
  flex-shrink: 0;
}

details.history-item[open] .chevron { transform: rotate(90deg); }

.item-body {
  padding: 0 22px 20px;
}

.item-notes {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.87rem;
  white-space: pre-line;
}

.item-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.item-link {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
}

.item-link:hover { text-decoration: underline; }

.item-hash {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--faint);
}