:root {
  --deep: #0f302b;
  --deep-d1: #0a221e;
  --deep-t1: #274540;
  --deep-t3: #cfd6d5;
  --deep-t4: #f3f5f4;
  --gold: #b08a58;
  --gold-t3: #e7dccd;
  --gold-t4: #f9f7f3;
  --cream: #faf8f5;
  --ink: #1c1c1a;
  --red: #b8433a;
  --green: #2f7d5c;
  --amber: #b8862f;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  background: var(--cream);
  color: var(--ink);
  line-height: 1.6;
}
a { color: var(--deep); }
/* ===== 側欄式版面（比照 GolfPrint 營運後台的結構）=====
   240px 深色側欄 + 淺色內容區。選中項目刻意「不」整塊反白——
   側欄本來就是深色，整塊反白會比內容區還搶眼；改用淡底＋品牌色左標。 */
body.has-sidebar { display: flex; min-height: 100vh; }

.sidebar {
  flex: 0 0 240px;
  width: 240px;
  background: var(--deep);
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 22px 12px 18px;
}
.sidebar-brand {
  padding: 0 12px;
  margin-bottom: 26px;
  color: #fff;
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.5px;
}
.sidebar-brand span { color: var(--gold); }
.sidebar-sub {
  margin-top: 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: rgba(255,255,255,0.38);
}

.sidebar nav { display: flex; flex-direction: column; gap: 22px; }
.nav-group-title {
  padding: 0 12px 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: rgba(255,255,255,0.34);
}
.sidebar nav a {
  position: relative;
  display: block;
  padding: 8px 12px 8px 14px;
  border-radius: 10px;
  font-size: 14px;
  color: rgba(255,255,255,0.62);
  text-decoration: none;
  transition: background .12s, color .12s;
}
.sidebar nav a::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  width: 3px; height: 16px;
  transform: translateY(-50%);
  border-radius: 0 3px 3px 0;
  background: transparent;
  transition: background .12s;
}
.sidebar nav a:hover { background: rgba(255,255,255,0.07); color: #fff; }
.sidebar nav a.active {
  background: rgba(255,255,255,0.10);
  color: #fff;
  font-weight: 600;
}
.sidebar nav a.active::before { background: var(--gold); }

.sidebar-logout { margin-top: auto; padding-top: 22px; }
.logout-btn {
  width: 100%;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.22);
  color: rgba(255,255,255,0.7);
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
  transition: background .12s, color .12s;
}
.logout-btn:hover { background: rgba(255,255,255,0.09); color: #fff; }

.content { flex: 1; min-width: 0; padding: 30px 32px 60px; }
.content-inner { max-width: 1100px; margin: 0 auto; }

h1.page-title { font-size: 22px; color: var(--deep); margin: 0 0 20px; }
.card {
  background: #fff; border-radius: 12px; padding: 20px;
  box-shadow: 0 2px 8px rgba(15,48,43,0.08); margin-bottom: 20px;
}
.grid { display: grid; gap: 16px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
/* grid 項目預設 min-width:auto，裡面若有寬表格會把欄位撐開、1fr 也壓不住，
   導致整頁出現橫向捲動。設成 0 才能讓內容乖乖縮回欄寬內。 */
.grid > * { min-width: 0; }
@media (max-width: 900px) { .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr 1fr; } }
.stat { background: #fff; border-radius: 12px; padding: 18px; box-shadow: 0 2px 8px rgba(15,48,43,0.08); }
.stat .label { font-size: 12px; color: #888; margin-bottom: 6px; }
.stat .value { font-size: 26px; font-weight: 800; color: var(--deep); }
.stat .value.gold { color: var(--gold); }
.btn {
  display: inline-block; padding: 9px 18px; border-radius: 8px; font-size: 13px;
  font-weight: 600; cursor: pointer; text-decoration: none; border: none;
}
.btn-primary { background: var(--deep); color: #fff; }
.btn-gold { background: var(--gold); color: #fff; }
.btn-outline { background: transparent; border: 1.5px solid var(--gold); color: var(--gold); }
.btn-danger { background: var(--red); color: #fff; }
.btn-sm { padding: 5px 12px; font-size: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--deep-t4); }
th { color: #888; font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
tr:hover td { background: var(--gold-t4); }
.tag {
  display: inline-block; font-size: 12px; padding: 3px 10px; border-radius: 20px;
  font-weight: 600; background: var(--deep-t4); color: var(--deep);
}
.tag.status-空櫃 { background: #e5f3ec; color: var(--green); }
.tag.status-已租 { background: var(--gold-t3); color: #7b613e; }
.tag.status-待清空 { background: #fbe9e7; color: var(--red); }
.tag.status-維修中 { background: #eee; color: #666; }
.tag.status-active { background: #e5f3ec; color: var(--green); }
.tag.status-ended, .tag.status-terminated { background: #eee; color: #777; }
.tag.status-paid { background: #e5f3ec; color: var(--green); }
.tag.status-unpaid { background: var(--gold-t3); color: #7b613e; }
.tag.status-overdue { background: #fbe9e7; color: var(--red); }
form.inline-form { display: inline; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--deep); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 9px 12px; border: 1px solid #ddd; border-radius: 8px; font-size: 14px;
  font-family: inherit;
}
.form-row { display: flex; gap: 16px; }
.form-row .form-group { flex: 1; }
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-error { background: #fbe9e7; color: var(--red); }
.alert-info { background: var(--deep-t4); color: var(--deep); }
.cabinet-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; }
.cabinet-cell {
  border-radius: 10px; padding: 12px 10px; text-align: center; text-decoration: none;
  border: 1px solid #eee; transition: transform .1s;
}
.cabinet-cell:hover { transform: translateY(-2px); }
.cabinet-cell .code { font-weight: 800; color: var(--deep); font-size: 15px; }
.cabinet-cell .rent { font-size: 12px; color: #888; margin-top: 4px; }
.cabinet-cell.status-空櫃 { background: #e5f3ec; }
.cabinet-cell.status-已租 { background: var(--gold-t3); }
.cabinet-cell.status-待清空 { background: #fbe9e7; }
.cabinet-cell.status-維修中 { background: #eee; }
.login-wrap { max-width: 380px; margin: 90px auto; }
.login-wrap .card { text-align: center; }
.chat-thread { display: flex; flex-direction: column; gap: 10px; max-height: 500px; overflow-y: auto; padding: 8px; }
.msg { max-width: 70%; padding: 10px 14px; border-radius: 14px; font-size: 14px; }
.msg.in { background: var(--deep-t4); align-self: flex-start; }
.msg.out { align-self: flex-end; color: #fff; }
.msg.out.bot { background: var(--gold); }
.msg.out.staff { background: var(--deep); }
.msg .meta { font-size: 10px; opacity: 0.65; margin-top: 4px; }
.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-wrap: wrap; gap: 10px; }
.section-title { font-size: 15px; font-weight: 700; color: var(--deep); margin: 0 0 12px; }
small.hint { color: #999; }

/* ===== 手機／平板（原本整份 CSS 只有一條 900px 的 grid 規則，
   導覽列、表格、表單在手機上都會爆版）===== */
@media (max-width: 720px) {
  /* 側欄在窄螢幕收合成頂部橫向捲動列：分組標題隱藏、項目攤平成一排 */
  body.has-sidebar { display: block; }
  .sidebar {
    position: sticky;
    top: 0;
    z-index: 20;
    flex: none;
    width: auto;
    height: auto;
    padding: 12px 14px 10px;
  }
  .sidebar-brand { margin-bottom: 10px; font-size: 15px; padding: 0; }
  .sidebar-sub { display: none; }
  .sidebar nav {
    flex-direction: row;
    gap: 4px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 2px;
  }
  .sidebar nav::-webkit-scrollbar { display: none; }
  .nav-group { display: contents; }
  .nav-group-title { display: none; }
  .sidebar nav a { flex: 0 0 auto; font-size: 13px; padding: 7px 12px; }
  .sidebar nav a::before { display: none; }
  .sidebar nav a.active { background: rgba(255,255,255,0.18); }
  /* 登出移到品牌名右側，不佔掉一整列 */
  .sidebar-logout { position: absolute; top: 10px; right: 14px; margin: 0; padding: 0; }
  .logout-btn { width: auto; padding: 6px 12px; font-size: 12px; }

  .content { padding: 18px 14px 48px; }
  h1.page-title { font-size: 19px; margin-bottom: 16px; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .card { padding: 16px; }
  .stat { padding: 14px; }
  .stat .value { font-size: 22px; }

  /* 表格改為可橫向捲動，避免整個頁面被寬表格撐開 */
  .content table { display: block; overflow-x: auto; white-space: nowrap; max-width: 100%; }

  .form-row { flex-direction: column; gap: 0; }
  .msg { max-width: 88%; }
  .cabinet-grid { grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 8px; }
  .login-wrap { margin: 40px auto; }
  .btn { padding: 8px 14px; }
  .toolbar .btn, .toolbar form { margin-top: 2px; }
}

@media (max-width: 420px) {
  .cabinet-grid { grid-template-columns: repeat(auto-fill, minmax(84px, 1fr)); }
  .sidebar-brand { font-size: 14px; }
}