:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --border: #e3e6ea;
  --text: #1c2430;
  --muted: #6b7684;
  --primary: #2f6fed;
  --primary-dark: #1f52c4;
  --green: #1f9d55;
  --red: #d5372f;
  --radius: 12px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 20px 16px 60px; }
h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 17px; margin: 0 0 12px; }
.sub { color: var(--muted); font-size: 13px; margin-bottom: 20px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 18px;
}
label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
input[type=text], input[type=password], input[type=search], textarea, select {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
textarea { min-height: 120px; font-family: ui-monospace, monospace; font-size: 12.5px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 160px; }
button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  font-weight: 600;
}
button:hover { background: var(--primary-dark); }
button.secondary { background: #eef1f5; color: var(--text); }
button.secondary:hover { background: #e2e6ec; }
button:disabled { opacity: .5; cursor: not-allowed; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: .02em; }
tr:hover td { background: #fafbfc; }
.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.unused { background: #eef1f5; color: var(--muted); }
.badge.checked_in { background: #e6f6ec; color: var(--green); }
.badge.seat { background: #ff8a1e; color: #fff; font-weight: 800; letter-spacing: .3px; }
.stats { display: flex; gap: 14px; margin-bottom: 6px; }
.stat { flex: 1; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.stat .num { font-size: 26px; font-weight: 700; }
.stat .lbl { font-size: 12.5px; color: var(--muted); }
.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.toolbar > * { flex: none; }
.toolbar input[type=search] { flex: 1; min-width: 180px; }
a.link { color: var(--primary); text-decoration: none; font-weight: 600; }
a.link:hover { text-decoration: underline; }
.note { font-size: 12.5px; color: var(--muted); margin-top: 8px; }
.gate { max-width: 360px; margin: 80px auto; text-align: center; }
.projecttabs { display: flex; align-items: flex-end; gap: 5px; flex-wrap: wrap; border-bottom: 2px solid var(--border); padding-bottom: 0; }
.projecttab {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 14px; border-radius: 10px 10px 0 0;
  border: 1px solid var(--border); border-bottom: none;
  background: #e9ecf1; color: var(--muted); font-size: 13.5px; font-weight: 600;
  cursor: pointer; position: relative; top: 2px; transition: background .12s, color .12s;
}
.projecttab:hover { background: #dde1e8; }
.projecttab .pt-name { cursor: pointer; }
.projecttab.active {
  background: var(--card); color: var(--text);
  border-bottom: 2px solid var(--card); top: 2px;
  box-shadow: 0 -2px 8px rgba(0,0,0,.05);
}
.projecttab.active:hover { background: var(--card); }
.projecttab .pt-edit, .projecttab .pt-del {
  opacity: .5; font-weight: 400; cursor: pointer; font-size: 12px; line-height: 1;
}
.projecttab .pt-edit:hover, .projecttab .pt-del:hover { opacity: 1; }
.projecttab-add {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; margin-bottom: 6px;
  border-radius: 50%; border: 1px solid var(--border);
  background: #eef1f5; color: var(--text); font-size: 17px; font-weight: 700; line-height: 1;
  cursor: pointer; transition: background .12s, color .12s, transform .12s;
}
.projecttab-add:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: scale(1.06); }