:root {
  --bg: #FAEEDA;
  --accent: #854F0B;
  --text: #633806;
  --kicker: #BA7517;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: background 0.4s ease, color 0.4s ease;
}
#stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem 1rem;
}
#kicker { font-size: 1rem; letter-spacing: 0.06em; margin: 0; color: var(--kicker); }
#weeklabel { font-size: 2.4rem; font-weight: 500; line-height: 1; margin: 0; color: var(--accent); }
#weeknum { font-size: clamp(6rem, 28vw, 12rem); font-weight: 500; line-height: 0.9; margin: 0.25rem 0 0; color: var(--accent); }
#datum { font-size: 1.1rem; margin: 1.25rem 0 0; }
#toggle {
  background: transparent; border: none; color: var(--text);
  opacity: 0.6; cursor: pointer; margin-top: 1.5rem;
  font: inherit; font-size: 0.85rem;
  display: inline-flex; align-items: center; gap: 6px;
}
#toggle:hover { opacity: 0.9; }
#toggle-chev { transition: transform 0.25s ease; }
#toggle[aria-expanded="true"] #toggle-chev { transform: rotate(180deg); }
#cal {
  width: 100%; max-width: 360px; margin-top: 1rem;
  display: grid; grid-template-rows: 0fr; opacity: 0;
  transition: grid-template-rows 0.35s ease, opacity 0.3s ease, margin-top 0.35s ease;
}
#cal:not(.open) { margin-top: 0; }
#cal.open { grid-template-rows: 1fr; opacity: 1; }
.cal-inner { overflow: hidden; min-height: 0; }
#cal-head { display: flex; align-items: center; justify-content: center; gap: 1rem; margin-bottom: 0.75rem; }
#cal-head button { background: transparent; border: none; color: var(--text); cursor: pointer; opacity: 0.6; font-size: 1.1rem; }
#cal-head button:hover { opacity: 1; }
#calmonth { font-size: 0.9rem; opacity: 0.8; min-width: 8rem; }
#calgrid { display: grid; grid-template-columns: 0.8fr repeat(7, 1fr); gap: 2px; font-size: 0.95rem; }
.cal-h { font-size: 0.75rem; font-weight: 500; padding: 6px 0; opacity: 0.85; }
.cal-h.nr { opacity: 0.5; }
.cal-nr { font-size: 0.75rem; padding: 7px 0; opacity: 0.4; }
.cal-nr.cur { opacity: 0.95; font-weight: 500; }
.cal-d { padding: 7px 0; }
.cal-d.today { background: var(--accent); color: #fff; border-radius: 6px; font-weight: 500; }
#season { font-size: 0.8rem; margin-top: 1.75rem; opacity: 0.65; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
#about-toggle {
  position: fixed; bottom: 1rem; right: 1rem;
  width: 32px; height: 32px; border-radius: 50%;
  background: transparent; border: 1px solid var(--text);
  color: var(--text); opacity: 0.4; cursor: pointer;
  font: inherit; font-size: 1rem; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.2s ease;
}
#about-toggle:hover, #about-toggle[aria-expanded="true"] { opacity: 0.85; }
#about {
  position: fixed; bottom: 3.6rem; right: 1rem;
  max-width: 230px; text-align: right;
  padding: 0.85rem 1rem;
  background: var(--bg); border: 1px solid var(--kicker); border-radius: 10px;
  color: var(--text); font-size: 0.85rem; line-height: 1.5;
  opacity: 0; transform: translateY(6px); pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
#about.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
#about p { margin: 0; }
#about p + p { margin-top: 0.8rem; }
#about strong { font-weight: 500; }