:root {
  --red: #e53935;
  --yellow: #f9a825;
  --green: #43a047;
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #2563eb;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Sarabun", sans-serif;
  background: var(--bg);
  color: var(--text);
  padding-bottom: 2rem;
}
a { color: inherit; text-decoration: none; }

.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .75rem 1rem;
  background: #1e293b;
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
  flex-wrap: wrap;
}
.topbar .brand { font-weight: 700; font-size: 1.1rem; color: #fff; }
.topbar nav { display: flex; gap: .75rem; flex: 1; }
.topbar nav a { color: #cbd5e1; font-size: .9rem; }
.topbar .who { display: flex; align-items: center; gap: .75rem; font-size: .85rem; color: #cbd5e1; }
.topbar .logout { color: #f87171; }

.wrap { max-width: 720px; margin: 0 auto; padding: 1rem; }

.login-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card { background: var(--card); border-radius: 16px; padding: 2rem; width: 100%; max-width: 360px; box-shadow: 0 2px 12px rgba(0,0,0,.08); text-align: center; }
.login-card h1 { margin-bottom: .25rem; }
.login-card .sub { color: var(--muted); margin-top: 0; margin-bottom: 1.5rem; font-size: .9rem; }
.login-card form { text-align: left; display: flex; flex-direction: column; gap: .5rem; }

.page-title { font-size: 1.4rem; margin: .5rem 0 1rem; }
.hint { color: var(--muted); font-size: .85rem; margin-top: -.5rem; }
.back-link { display: inline-block; margin-bottom: .5rem; color: var(--muted); font-size: .9rem; }

label { font-size: .85rem; color: var(--muted); margin-top: .5rem; }
input, textarea, select {
  width: 100%;
  padding: .6rem .7rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
}
button, .btn {
  border: none;
  border-radius: 10px;
  padding: .7rem 1.1rem;
  font-size: .95rem;
  cursor: pointer;
  display: inline-block;
  text-align: center;
}
.btn-primary, button[type="submit"] { background: var(--accent); color: #fff; }
.btn-secondary { background: #e5e7eb; color: var(--text); }
.btn-danger { background: var(--red); color: #fff; }
.btn-sm { padding: .4rem .7rem; font-size: .8rem; }
.err { color: var(--red); font-size: .9rem; }

.section { margin-top: 1.5rem; }
.section h2 { font-size: 1.05rem; display: flex; align-items: center; gap: .4rem; }
.count { background: var(--border); border-radius: 999px; padding: .1rem .5rem; font-size: .75rem; color: var(--muted); }
.empty { color: var(--muted); font-size: .9rem; }

.task-list { display: flex; flex-direction: column; gap: .6rem; }
.task-card {
  background: var(--card);
  border-radius: 12px;
  padding: .8rem .9rem;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
  border-left: 4px solid var(--border);
}
.task-card.flag-red { border-left-color: var(--red); }
.task-card.flag-yellow { border-left-color: var(--yellow); }
.task-card.flag-green { border-left-color: var(--green); }
.task-top { display: flex; align-items: center; gap: .5rem; }
.task-title { font-weight: 600; flex: 1; }
.task-meta { color: var(--muted); font-size: .82rem; margin-top: .25rem; }

.flag-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.flag-dot.flag-red, .badge.flag-red { background: var(--red); }
.flag-dot.flag-yellow, .badge.flag-yellow { background: var(--yellow); }
.flag-dot.flag-green, .badge.flag-green { background: var(--green); }

.status-pill { font-size: .72rem; padding: .15rem .55rem; border-radius: 999px; background: var(--border); color: var(--muted); white-space: nowrap; }
.status-pill.status-open { background: #dbeafe; color: #1e40af; }
.status-pill.status-done { background: #fef3c7; color: #92400e; }
.status-pill.status-approved { background: #dcfce7; color: #166534; }

.overdue { color: var(--red); font-weight: 600; }
.due-today { color: var(--yellow); font-weight: 600; }

.fab { display: block; text-align: center; margin-top: 2rem; color: var(--accent); font-weight: 600; }

/* org tree */
.tree-scroll { overflow-x: auto; padding: 1rem 0; }
ul.org-tree, ul.org-tree ul {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: table;
  table-layout: fixed;
}
ul.org-tree { margin: 0 auto; }
ul.org-tree ul { width: 100%; }
ul.org-tree li {
  display: table-cell;
  padding: 1.2rem .5rem 0;
  vertical-align: top;
  position: relative;
}
ul.org-tree li::before {
  outline: solid 1px var(--border);
  content: "";
  left: 0; right: 0; top: 0;
  position: absolute;
}
ul.org-tree li:first-child::before { left: 50%; }
ul.org-tree li:last-child::before { right: 50%; }
ul.org-tree li:only-child::before { display: none; }
ul.org-tree > li::before { display: none; }
ul.org-tree ul::before {
  outline: solid 1px var(--border);
  content: "";
  height: 1.2rem;
  left: 50%;
  position: absolute;
  top: -1.2rem;
}
.person-node {
  display: inline-block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: .6rem .8rem;
  min-width: 110px;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.person-name { font-weight: 600; font-size: .9rem; white-space: nowrap; }
.person-badges { display: flex; gap: .25rem; margin-top: .3rem; justify-content: center; }
.badge { color: #fff; font-size: .7rem; border-radius: 999px; padding: .05rem .4rem; }
.inactive-tag { font-size: .7rem; color: var(--muted); margin-top: .2rem; }

/* task detail */
.task-header { display: flex; align-items: center; justify-content: space-between; gap: .5rem; flex-wrap: wrap; border-left: 4px solid var(--border); padding-left: .75rem; }
.task-header.flag-red { border-left-color: var(--red); }
.task-header.flag-yellow { border-left-color: var(--yellow); }
.task-header.flag-green { border-left-color: var(--green); }
.task-info { background: var(--card); border-radius: 12px; padding: .9rem; font-size: .9rem; }
.task-desc { white-space: pre-wrap; }
.task-actions { display: flex; gap: .6rem; margin-top: 1rem; flex-wrap: wrap; }
.reject-details summary { list-style: none; }
.reject-details summary::-webkit-details-marker { display: none; }
.reject-form { display: flex; gap: .5rem; margin-top: .5rem; }

.feed { display: flex; flex-direction: column; gap: .5rem; }
.feed-item { background: var(--card); border-radius: 10px; padding: .6rem .8rem; font-size: .88rem; }
.feed-item.feed-status_change { background: #f1f5f9; color: var(--muted); font-style: italic; }
.feed-meta { font-size: .75rem; color: var(--muted); margin-bottom: .15rem; }
.comment-form { display: flex; gap: .5rem; margin-top: .75rem; }
.comment-form textarea { flex: 1; }

.priority-picker { display: flex; gap: .5rem; }
.priority-opt { flex: 1; border: 2px solid var(--border); border-radius: 10px; padding: .5rem; text-align: center; font-size: .85rem; cursor: pointer; }
.priority-opt input { width: auto; }
.priority-opt.flag-red { border-color: #fecaca; }
.priority-opt.flag-yellow { border-color: #fde68a; }
.priority-opt.flag-green { border-color: #bbf7d0; }
.priority-opt:has(input:checked).flag-red { background: #fee2e2; border-color: var(--red); }
.priority-opt:has(input:checked).flag-yellow { background: #fef9c3; border-color: var(--yellow); }
.priority-opt:has(input:checked).flag-green { background: #dcfce7; border-color: var(--green); }

.form-card { background: var(--card); border-radius: 12px; padding: 1rem; display: flex; flex-direction: column; gap: .3rem; }
.form-card button { margin-top: 1rem; }

.user-list { display: flex; flex-direction: column; gap: .5rem; }
.user-row { background: var(--card); border-radius: 10px; padding: .7rem .9rem; display: flex; align-items: center; justify-content: space-between; gap: .5rem; flex-wrap: wrap; }
.user-inactive { opacity: .55; }
.muted { color: var(--muted); font-size: .85rem; }
.badge-owner { background: #ede9fe; color: #6d28d9; font-size: .7rem; padding: .1rem .4rem; border-radius: 999px; margin-left: .3rem; }
.badge-off { background: var(--border); color: var(--muted); font-size: .7rem; padding: .1rem .4rem; border-radius: 999px; margin-left: .3rem; }
.user-actions { display: flex; gap: .4rem; align-items: center; }
.inline-form { display: flex; gap: .4rem; margin-top: .3rem; }

@media (max-width: 480px) {
  .topbar { justify-content: space-between; }
  .topbar nav { order: 3; width: 100%; }
}