html, body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: #f7f7f9;
  color: #111;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.page {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 340px;
  max-width: 92vw;
  background: #fff;
  border-right: 1px solid #e6e6eb;
  padding: 18px 16px;
  box-sizing: border-box;
}

.sidebar h1 {
  margin: 0 0 8px 0;
  font-size: 20px;
  font-weight: 650;
}

.sidebar .muted {
  color: #555;
  font-size: 13px;
  line-height: 1.35;
}

.control {
  margin-top: 14px;
}

label {
  display: block;
  font-size: 13px;
  color: #222;
  margin-bottom: 6px;
}

select, button {
  width: 100%;
  box-sizing: border-box;
  font-size: 14px;
  padding: 10px 10px;
  border-radius: 8px;
  border: 1px solid #d7d7de;
  background: #fff;
}

button {
  cursor: pointer;
  background: #111;
  color: #fff;
  border: 1px solid #111;
}

button:disabled {
  background: #999;
  border-color: #999;
  cursor: not-allowed;
}

details {
  border: 1px solid #e6e6eb;
  border-radius: 8px;
  padding: 10px;
  background: #fafafe;
}

details summary {
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
}

details ul {
  margin: 10px 0 0 18px;
  padding: 0;
  font-size: 13px;
  color: #333;
}

.footer {
  margin-top: 18px;
  border-top: 1px solid #eee;
  padding-top: 12px;
}

.main {
  flex: 1;
  padding: 18px;
  box-sizing: border-box;
}

.calendarHeader {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.calendarHeader h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 650;
}

#calendar {
  background: #fff;
  border: 1px solid #e6e6eb;
  border-radius: 12px;
  padding: 10px;
}