:root {
  --bg: #ffffff;
  --fg: #111111;
  --line: #dddddd;
  --muted: #777777;
  --fill: #f4f4f4;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 12px 40px;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  max-width: 560px;
  margin-inline: auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding: 8px 0;
}

.tabs { display: flex; gap: 4px; }

.tabs a {
  padding: 8px 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--fg);
  text-decoration: none;
}

.tabs a.on { background: var(--fg); color: var(--bg); border-color: var(--fg); }

.who { margin: 0; font-size: 14px; color: var(--muted); }
.who a { color: var(--muted); margin-left: 6px; }

.flash {
  list-style: none;
  margin: 12px 0;
  padding: 10px 12px;
  border: 1px solid var(--fg);
  border-radius: 6px;
}

.days { display: flex; gap: 8px; margin: 16px 0 8px; }

.days a {
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--fg);
  text-decoration: none;
  font-size: 15px;
}

.days a.on { border-color: var(--fg); font-weight: 600; }

.section { font-size: 15px; margin: 20px 0 6px; font-weight: 600; }

.rooms { display: flex; gap: 10px; align-items: flex-start; }
.room { flex: 1; min-width: 0; }

.room h3 {
  margin: 0 0 4px;
  font-size: 14px;
  font-weight: 600;
  text-align: center;
}

.room h3 small { display: block; font-weight: normal; color: var(--muted); font-size: 12px; }

.grid { width: 100%; border-collapse: collapse; table-layout: fixed; }

.grid th, .grid td {
  border: 1px solid var(--line);
  padding: 0;
  text-align: center;
  font-weight: normal;
  font-size: 14px;
}

.grid th.time { width: 54px; color: var(--muted); padding: 4px 2px; font-size: 13px; }

.cell { height: 42px; }
.cell form { display: flex; align-items: center; justify-content: center; gap: 6px; height: 100%; }

.cell.taken { background: var(--fill); }
.cell.mine { background: var(--bg); outline: 2px solid var(--fg); outline-offset: -2px; }
.cell.past { background: var(--fill); }
.cell .past { color: var(--muted); }
.cell .taken, .cell .me { display: inline-block; padding: 0 4px; }

button {
  font: inherit;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
}

button.free { width: 100%; height: 100%; min-height: 44px; border: none; color: var(--muted); }
button.free:active { background: var(--fill); }

button.cancel { padding: 2px 8px; font-size: 13px; color: var(--muted); }

button.link {
  border: none;
  background: none;
  color: var(--muted);
  text-decoration: underline;
  padding: 4px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  margin: 16px 0;
  text-align: center;
}

.card h2 { font-size: 17px; margin: 0; }
.card .state { margin: 4px 0 14px; font-size: 13px; color: var(--muted); }
.card.open { border-color: var(--fg); }
.card.closed { background: var(--fill); }

.sizes { display: flex; gap: 10px; justify-content: center; }
.sizes form { flex: 1; max-width: 150px; }

.btn {
  display: block;
  width: 100%;
  min-height: 56px;
  font-size: 17px;
  line-height: 1.2;
  border: 1px solid var(--fg);
  border-radius: 8px;
  padding: 8px 12px;
}

.btn small { display: block; font-size: 12px; color: var(--muted); margin-top: 2px; }
.btn.voted { background: var(--fg); color: var(--bg); }
.btn.voted small { color: var(--bg); }

.count { margin: 14px 0 0; font-size: 22px; font-weight: 600; }
.sub { margin: 2px 0 0; font-size: 13px; color: var(--muted); }

.pick { display: flex; flex-wrap: wrap; gap: 8px; }
.pick button.free { width: auto; min-width: 96px; border: 1px solid var(--line); color: var(--fg); padding: 10px 16px; }

.add { display: flex; gap: 8px; margin: 12px 0; }
.add input { flex: 1; font: inherit; padding: 8px; border: 1px solid var(--line); border-radius: 6px; }

.members { list-style: none; padding: 0; margin: 0; }
.members li { display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); padding: 6px 0; }
.members li.hidden span { color: var(--muted); text-decoration: line-through; }

.note, .empty { color: var(--muted); font-size: 14px; }

footer { margin-top: 32px; border-top: 1px solid var(--line); padding-top: 10px; }
footer a { color: var(--muted); font-size: 14px; }