:root {
  --primary: #3a6ea5;
  --primary-dark: #2b5480;
  --bg: #f4f6f9;
  --card: #ffffff;
  --border: #e2e6ec;
  --text: #24303f;
  --muted: #6b7684;
  --danger: #d64545;
  --success: #2f9e6f;
  --warn: #d98a00;
  --radius: 10px;
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: "Noto Sans TC", system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.5;
}
a { color: var(--primary); text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* 登入 */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-card {
  background: var(--card); border-radius: 14px; padding: 34px 30px; width: 100%; max-width: 380px;
  box-shadow: 0 10px 40px rgba(0,0,0,.08);
}
.login-card h1 { margin: 0 0 4px; font-size: 24px; color: var(--primary-dark); }
.login-card .sub { color: var(--muted); margin: 0 0 22px; font-size: 14px; }

/* 版面 */
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 210px; background: #223143; color: #cdd6e2; flex-shrink: 0;
  display: flex; flex-direction: column; padding: 16px 0;
}
.sidebar .brand { font-size: 19px; font-weight: 700; color: #fff; padding: 6px 20px 18px; }
.sidebar nav a {
  display: block; padding: 10px 20px; color: #cdd6e2; font-size: 14.5px; border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: #2c3e55; color: #fff; }
.sidebar nav a.active { background: #2c3e55; color: #fff; border-left-color: var(--primary); }
.sidebar .spacer { flex: 1; }
.sidebar .userbox { padding: 12px 20px; border-top: 1px solid #33455c; font-size: 13px; color: #9fb0c4; }
.sidebar .userbox button {
  margin-top: 8px; background: none; border: 1px solid #4a5e78; color: #cdd6e2; border-radius: 6px;
  padding: 5px 10px; font-size: 12.5px;
}
.main { flex: 1; min-width: 0; }
.topbar {
  background: var(--card); border-bottom: 1px solid var(--border); padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 5;
}
.topbar h2 { margin: 0; font-size: 19px; }
.content { padding: 22px 24px; }

/* 手機 */
.menu-toggle { display: none; background: none; border: none; font-size: 22px; }
@media (max-width: 820px) {
  .sidebar { position: fixed; left: -220px; top: 0; bottom: 0; z-index: 20; transition: left .2s; }
  .sidebar.open { left: 0; }
  .menu-toggle { display: inline-block; }
  .backdrop { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 15; }
  .backdrop.show { display: block; }
}

/* 卡片與格線 */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.stat .label { color: var(--muted); font-size: 13px; }
.stat .value { font-size: 26px; font-weight: 700; margin-top: 4px; }
.stat .value.warn { color: var(--warn); }
.stat .value.danger { color: var(--danger); }

.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; margin-bottom: 18px; }
.card h3 { margin: 0 0 14px; font-size: 16px; }
.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.card-head h3 { margin: 0; }

/* 表格 */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { color: var(--muted); font-weight: 600; font-size: 13px; background: #fafbfc; }
tbody tr:hover { background: #f8fafc; }
.table-wrap { overflow-x: auto; }

/* 表單 */
label { display: block; font-size: 13.5px; color: var(--muted); margin: 10px 0 4px; }
input, select, textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14.5px; font-family: inherit; background: #fff; color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); }
textarea { min-height: 70px; resize: vertical; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > div { flex: 1; min-width: 140px; }

/* 按鈕 */
.btn {
  display: inline-block; background: var(--primary); color: #fff; border: none; border-radius: 8px;
  padding: 9px 16px; font-size: 14px; font-weight: 500;
}
.btn:hover { background: var(--primary-dark); }
.btn.sm { padding: 5px 11px; font-size: 13px; }
.btn.ghost { background: none; color: var(--primary); border: 1px solid var(--border); }
.btn.ghost:hover { background: #f0f4f9; }
.btn.danger { background: var(--danger); }
.btn.success { background: var(--success); }
.btn.warn { background: var(--warn); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }

/* 標籤 */
.tag { display: inline-block; padding: 2px 9px; border-radius: 20px; font-size: 12.5px; font-weight: 500; }
.tag.green { background: #e3f5ec; color: var(--success); }
.tag.red { background: #fbe6e6; color: var(--danger); }
.tag.gray { background: #edf0f3; color: var(--muted); }
.tag.blue { background: #e5eef8; color: var(--primary); }
.tag.orange { background: #fdefd9; color: var(--warn); }

.muted { color: var(--muted); }
.right { text-align: right; }
.center { text-align: center; }
.nowrap { white-space: nowrap; }
.err { color: var(--danger); font-size: 13.5px; margin: 8px 0; }
.ok-msg { color: var(--success); font-size: 13.5px; margin: 8px 0; }
.empty { color: var(--muted); text-align: center; padding: 30px; }
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 14px; }
.toolbar > div { min-width: 130px; }
.toolbar label { margin: 0 0 3px; }

/* Modal */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(20,28,40,.5); display: flex; align-items: flex-start;
  justify-content: center; padding: 40px 16px; z-index: 30; overflow-y: auto;
}
.modal { background: #fff; border-radius: 12px; width: 100%; max-width: 560px; padding: 22px 24px; }
.modal h3 { margin: 0 0 16px; }
.modal .close { float: right; background: none; border: none; font-size: 20px; color: var(--muted); }

.pill-group { display: flex; gap: 6px; flex-wrap: wrap; }
.pill-group button {
  border: 1px solid var(--border); background: #fff; border-radius: 20px; padding: 4px 12px; font-size: 13px; color: var(--muted);
}
.pill-group button.on { background: var(--primary); color: #fff; border-color: var(--primary); }