:root {
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #d9dee6;
  --accent: #1a3a7a;
  --accent-soft: #eef2fb;
  --bg: #f7f8fb;
  --warn-bg: #fdecea;
  --warn-ink: #9a2f2f;
  --ok-bg: #e9f5ea;
  --ok-ink: #2a6a34;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "PingFang SC", "Microsoft JhengHei", "Noto Sans CJK TC", sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 24px;
  background: white;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
  gap: 8px;
}

.brand {
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  font-size: 1.1rem;
}

nav a {
  margin-left: 14px;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.92rem;
}

nav a:hover { color: var(--accent); }

.who { margin-left: 14px; color: var(--muted); font-size: 0.88rem; }

.lang-switch { margin-left: 14px; font-size: 0.88rem; }
.lang-switch a { margin-left: 0; color: var(--muted); }
.lang-switch a.active { color: var(--accent); font-weight: 600; }
.lang-sep { color: var(--line); margin: 0 4px; }

.lang-choice {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}
.lang-choice a {
  padding: 10px 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-decoration: none;
  color: var(--ink);
  background: white;
  font-size: 0.95rem;
}
.lang-choice a.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.container {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 24px 48px;
}

h1 { font-size: 1.5rem; margin-bottom: 4px; }
h2 { font-size: 1.15rem; margin-top: 28px; }
.subtitle { color: var(--muted); margin-top: 0; }

.flashes { margin-bottom: 16px; }
.flash {
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 8px;
  font-size: 0.92rem;
}
.flash-success { background: var(--ok-bg); color: var(--ok-ink); }
.flash-error { background: var(--warn-bg); color: var(--warn-ink); }

.card {
  background: white;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 22px;
  margin-bottom: 20px;
}

form .field { margin-bottom: 14px; }
form label { display: block; font-size: 0.86rem; color: var(--muted); margin-bottom: 4px; }
form input[type=text], form input[type=email], form input[type=password],
form input[type=number], form select, form textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 0.95rem;
}
form textarea { min-height: 80px; }
.field-errors { color: var(--warn-ink); font-size: 0.82rem; margin-top: 4px; }

button, .btn {
  display: inline-block;
  background: var(--accent);
  color: white;
  border: none;
  padding: 9px 16px;
  border-radius: 6px;
  font-size: 0.92rem;
  cursor: pointer;
  text-decoration: none;
}
button.secondary, .btn.secondary { background: var(--muted); }
button.danger, .btn.danger { background: var(--warn-ink); }

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
table th, table td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table th { color: var(--muted); font-weight: 600; background: var(--accent-soft); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.78rem;
  background: var(--accent-soft);
  color: var(--accent);
}

.pager { margin-top: 14px; display: flex; gap: 10px; align-items: center; }

.role-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-top: 18px; }
.role-grid .card p { color: var(--muted); font-size: 0.88rem; }

#person-search { width: 100%; padding: 9px 10px; border: 1px solid var(--line); border-radius: 6px; margin-bottom: 10px; }
#person-list { max-height: 260px; overflow-y: auto; border: 1px solid var(--line); border-radius: 6px; background: white; }
#person-list label { display: block; padding: 6px 10px; font-weight: 400; color: var(--ink); cursor: pointer; }
#person-list label:hover { background: var(--accent-soft); }
#selected-chips { margin: 10px 0; display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.82rem;
}

#tree-svg-wrap { background: white; border: 1px solid var(--line); border-radius: 10px; overflow: auto; }
.tree-node rect { fill: #f6f8fc; stroke: #aab4c8; cursor: pointer; }
.tree-node rect:hover { fill: var(--accent-soft); stroke: var(--accent); }
.tree-node text { font-size: 12px; fill: var(--ink); pointer-events: none; }
.tree-link { fill: none; stroke: #9aa5b8; stroke-width: 1.4px; }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(15, 23, 42, 0.45);
  display: none; align-items: center; justify-content: center; z-index: 50;
}
.modal-backdrop.open { display: flex; }
.modal-box {
  background: white; border-radius: 10px; padding: 20px 24px; max-width: 420px; width: 90%;
}
.modal-box h3 { margin-top: 0; }
.modal-box .close { float: right; cursor: pointer; color: var(--muted); }