:root{
  --bg:#f2f6fc;
  --surface:#ffffff;
  --surface-2:#f8f9fc;
  --border:#e3e6f0;
  --border-strong:#d1d3e2;
  --text:#3a3b45;
  --text-dim:#858796;
  --primary:#4e73df;
  --primary-h:#2e59d9;
  --primary-light:#eaecf4;
  --accent:#36b9cc;
  --success:#1cc88a;
  --danger:#e74a3b;
  --warn:#f6c23e;
  --shadow:0 .15rem 1.75rem 0 rgba(58,59,69,.07);
  --shadow-lg:0 .5rem 2rem 0 rgba(58,59,69,.13);

  /* dark sidebar */
  --sb-bg:#212529;
  --sb-text:#adb5bd;
  --sb-text-active:#ffffff;
  --sb-section:#6c757d;
  --sb-hover:rgba(255,255,255,.08);
  --sb-active:rgba(255,255,255,.12);
}
*{box-sizing:border-box}
body{
  font-family:'Sarabun',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:var(--bg);
  color:var(--text);
  margin:0;
  min-height:100vh;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* ============ Sidebar Layout (dark) ============ */
.layout{display:flex;min-height:100vh}
.sidebar{
  width:240px;
  background:var(--sb-bg);
  color:var(--sb-text);
  border-right:none;
  box-shadow:0 0 .35rem rgba(0,0,0,.4);
  display:flex;
  flex-direction:column;
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  z-index:10;
}
.sidebar-brand{
  padding:20px 24px;
  border-bottom:1px solid rgba(255,255,255,.06);
  background:rgba(0,0,0,.15);
  display:flex;
  align-items:center;
  gap:10px;
}
.sidebar-brand-icon{font-size:24px}
.sidebar-brand-text{font-weight:700;font-size:18px;color:#fff}
.sidebar-brand-sub{font-size:11px;color:var(--sb-text);margin-top:2px}

.sidebar-menu{flex:1;padding:12px 8px;overflow-y:auto}
.sidebar-section{
  font-size:10px;
  font-weight:700;
  color:var(--sb-section);
  text-transform:uppercase;
  letter-spacing:1.2px;
  padding:14px 16px 6px;
}
.sidebar a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 16px;
  color:var(--sb-text);
  font-size:14px;
  font-weight:500;
  border-radius:4px;
  margin:1px 0;
  border-left:3px solid transparent;
  transition:all .15s;
}
.sidebar a:hover{background:var(--sb-hover);text-decoration:none;color:var(--sb-text-active)}
.sidebar a.active{background:var(--sb-active);color:var(--sb-text-active);border-left-color:var(--primary);font-weight:600}
.sidebar a .icon{font-size:18px;width:22px;text-align:center;opacity:.85}
.sidebar a.active .icon,.sidebar a:hover .icon{opacity:1}

/* parent menu (expandable) */
.sidebar-parent{
  display:flex;
  align-items:center;
  gap:10px;
  width:100%;
  padding:10px 16px;
  background:transparent;
  border:none;
  border-left:3px solid transparent;
  border-radius:4px;
  margin:1px 0;
  color:var(--sb-text);
  font-size:14px;
  font-weight:500;
  font-family:inherit;
  cursor:pointer;
  text-align:left;
  transition:all .15s;
}
.sidebar-parent:hover{background:var(--sb-hover);color:var(--sb-text-active)}
.sidebar-parent .icon{font-size:18px;width:22px;text-align:center;opacity:.85}
.sidebar-parent .caret{font-size:10px;opacity:.6;transition:transform .2s}
.sidebar-parent.open{color:var(--sb-text-active);background:rgba(255,255,255,.04)}
.sidebar-parent.open .caret{transform:rotate(180deg);opacity:1}

/* submenu collapse/expand */
.submenu{
  max-height:0;
  overflow:hidden;
  transition:max-height .25s ease;
}
.sidebar-parent.open + .submenu{max-height:400px}
.submenu a{
  padding:8px 16px 8px 36px;
  font-size:13px;
  font-weight:400;
  color:var(--sb-text);
  border-radius:4px;
  margin:1px 8px;
}
.submenu a .icon{font-size:14px;width:18px}
.submenu a.active{background:var(--sb-active);color:var(--sb-text-active);border-left-color:var(--primary);font-weight:600}

.sidebar-foot{
  border-top:1px solid rgba(255,255,255,.06);
  background:rgba(0,0,0,.2);
  padding:14px 16px;
  display:flex;
  align-items:center;
  gap:10px;
}
.sidebar-foot-info{flex:1;min-width:0}
.sidebar-foot-name{font-size:13px;color:#fff;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sidebar-foot-role{font-size:11px;color:var(--sb-text)}
.sidebar-foot .btn-sec{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.15)}
.sidebar-foot .btn-sec:hover{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.25)}

.main{
  flex:1;
  margin-left:240px;
  min-width:0;
}
.container{max-width:1280px;margin:0 auto;padding:18px 20px}

/* mobile: sidebar collapses */
.sidebar-toggle{display:none;background:none;border:none;color:var(--text);font-size:24px;cursor:pointer;padding:8px}
@media(max-width:900px){
  .sidebar{transform:translateX(-100%);transition:transform .2s}
  .sidebar.open{transform:translateX(0)}
  .main{margin-left:0}
  .sidebar-toggle{display:block;position:fixed;top:12px;left:12px;z-index:20;background:var(--surface);border:1px solid var(--border);border-radius:6px;box-shadow:var(--shadow)}
  .container{padding:24px 16px;padding-top:60px}
}

.card{
  background:var(--surface);
  border-radius:10px;
  padding:24px;
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  margin-bottom:16px;
}
.card-header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:16px;
  padding-bottom:12px;
  border-bottom:1px solid var(--border);
}
.card-header h2{margin:0;font-size:18px;color:var(--text)}

h1{font-size:24px;margin:0 0 16px;color:var(--text)}

.btn{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 16px;
  border-radius:6px;
  border:1px solid transparent;
  background:var(--primary);
  color:white;
  font-size:14px;
  font-weight:500;
  cursor:pointer;
  text-decoration:none;
  transition:background .15s;
  font-family:inherit;
}
.btn:hover{background:var(--primary-h);text-decoration:none}
.btn-sec{background:var(--surface);color:var(--text);border-color:var(--border-strong)}
.btn-sec:hover{background:var(--surface-2);border-color:var(--primary)}
.btn-danger{background:var(--danger)}
.btn-danger:hover{background:#b91c1c}
.btn-sm{padding:4px 10px;font-size:12px}
.btn-icon{padding:4px 6px;font-size:15px;line-height:1;background:transparent;border:none;color:inherit;border-radius:4px;opacity:.85;display:inline-block;text-decoration:none}
.btn-icon:hover{background:var(--surface-2);opacity:1;text-decoration:none}
.btn-icon + .btn-icon{margin-left:4px}

.form-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:8px 12px}
.field{display:flex;flex-direction:column;gap:3px}
.field label{
  font-size:12px;
  color:var(--text);
  font-weight:600;
  letter-spacing:.2px;
}
.field label .req{color:var(--danger);margin-left:2px}
.field input,.field select,.field textarea{
  background:#fafbfc;
  border:1px solid var(--border);
  border-radius:6px;
  padding:6px 10px;
  color:var(--text);
  font-size:13px;
  font-family:inherit;
  transition:all .15s;
  min-height:32px;
}
.field input:hover,.field select:hover,.field textarea:hover{
  border-color:var(--border-strong);
  background:#fff;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:var(--primary);
  background:#fff;
  box-shadow:0 0 0 3px rgba(78,115,223,.15);
}
.field input:disabled{background:#f1f3f9;color:var(--text-dim);cursor:not-allowed;border-style:dashed}
.field textarea{min-height:60px;resize:vertical;line-height:1.4}

.section-title{
  font-size:13px;
  font-weight:700;
  color:var(--primary);
  text-transform:uppercase;
  letter-spacing:1px;
  margin:24px 0 10px;
  grid-column:span 12;
  padding:10px 14px;
  background:linear-gradient(90deg, var(--primary-light), transparent);
  border-left:4px solid var(--primary);
  border-radius:0 6px 6px 0;
  display:flex;
  align-items:center;
  gap:8px;
}
.section-title:first-child{margin-top:0}
.section-title::before{content:'▸';font-size:14px;opacity:.7}

.col-2{grid-column:span 2}.col-3{grid-column:span 3}.col-4{grid-column:span 4}.col-5{grid-column:span 5}.col-6{grid-column:span 6}.col-8{grid-column:span 8}.col-12{grid-column:span 12}
@media(max-width:768px){.col-2,.col-3,.col-4,.col-5,.col-6,.col-8{grid-column:span 12}}

.radio-group{display:flex;gap:16px;align-items:center;padding:8px 0;flex-wrap:wrap}
.radio-group label{
  display:flex;
  align-items:center;
  gap:6px;
  cursor:pointer;
  font-size:14px;
  color:var(--text);
  padding:6px 12px;
  border-radius:6px;
  border:1px solid var(--border);
  background:var(--surface);
  transition:all .15s;
}
.radio-group label:hover{border-color:var(--primary)}
.radio-group input[type=radio]{accent-color:var(--primary);margin:0}
.radio-group input[type=radio]:checked + span,
.radio-group label:has(input:checked){background:var(--primary-light);border-color:var(--primary);color:var(--primary)}

.table{width:100%;border-collapse:collapse;font-size:13px}
.table th,.table td{text-align:left;padding:6px 8px;border-bottom:1px solid var(--border)}
.table th{
  color:var(--text-dim);
  font-weight:600;
  font-size:11px;
  text-transform:uppercase;
  letter-spacing:.3px;
  background:var(--surface-2);
}
.table tr:hover td{background:var(--surface-2)}

.tag{
  display:inline-block;
  padding:2px 10px;
  border-radius:999px;
  font-size:11px;
  font-weight:600;
  background:var(--surface-2);
  color:var(--text-dim);
  border:1px solid var(--border);
}
.tag-head  {background:#ea580c;color:#fff;border-color:#c2410c}      /* หัว = ส้มเข้มเต็ม */
.tag-trail {background:#ffedd5;color:#9a3412;border-color:#fdba74}  /* หาง = ส้มอ่อน */
.tag-10w   {background:#dcfce7;color:#15803d;border-color:#4ade80}  /* สิบล้อ = เขียว */
.tag-office{background:#e0e7ff;color:#3730a3;border-color:#a5b4fc}  /* สำนักงาน = ม่วงคราม */
/* tag ในคอลัมน์ "คู่ปัจจุบัน" — เขียวเสมอ ไม่ว่าประเภทคู่จะเป็นอะไร */
.tag-pair{background:#f1f5f9;color:#475569;border-color:#cbd5e1;font-weight:600}

/* Modal */
.modal-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,.5);
  display:flex;align-items:center;justify-content:center;
  z-index:100;padding:20px;
  animation:fadein .15s;
}
.modal-content{
  background:var(--surface);
  border-radius:10px;
  max-width:780px;width:100%;max-height:85vh;
  display:flex;flex-direction:column;
  box-shadow:var(--shadow-lg);
}
.modal-header{
  padding:14px 20px;
  border-bottom:1px solid var(--border);
  display:flex;justify-content:space-between;align-items:center;
}
@keyframes fadein{from{opacity:0}to{opacity:1}}

/* hover effect for compartments popup button */
.comp-popup-btn:hover{background:var(--surface-2) !important;border-color:var(--primary) !important}

/* status pill — select ที่หน้าตาเหมือน tag แต่กดเปลี่ยนค่าได้ */
.status-pill{
  appearance:none;
  -webkit-appearance:none;
  border:1px solid var(--border);
  border-radius:999px;
  padding:4px 26px 4px 12px;
  font-size:12px;
  font-weight:600;
  cursor:pointer;
  font-family:inherit;
  background-color:#f5f5f4;
  color:#57534e;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='currentColor'><path d='M6 9L1.5 4.5h9z'/></svg>");
  background-repeat:no-repeat;
  background-position:right 8px center;
  background-size:9px;
  transition:filter .15s, transform .1s;
  min-height:0 !important;
}
.status-pill:hover{filter:brightness(.96)}
.status-pill:focus{outline:none;box-shadow:0 0 0 3px rgba(78,115,223,.2)}
.status-pill[data-status="ใช้งาน"]{background-color:#dcfce7;color:#15803d;border-color:#86efac}
.status-pill[data-status="ซ่อม"]  {background-color:#fed7aa;color:#9a3412;border-color:#fb923c}
.status-pill[data-status="จอด"]  {background-color:#e0e7ff;color:#3730a3;border-color:#a5b4fc}
.status-pill[data-status="ปลดระวาง"]{background-color:#fee2e2;color:#991b1b;border-color:#fca5a5}

.tabs{
  display:flex;
  gap:4px;
  border-bottom:1px solid var(--border);
  margin-bottom:16px;
  background:var(--surface);
  padding:0 12px;
  border-radius:10px 10px 0 0;
  box-shadow:var(--shadow);
}
.tab{
  padding:12px 20px;
  color:var(--text-dim);
  text-decoration:none;
  border-bottom:2px solid transparent;
  font-size:14px;
  font-weight:500;
  transition:all .15s;
}
.tab.active{color:var(--primary);border-bottom-color:var(--primary)}
.tab:hover{color:var(--primary);text-decoration:none}

.alert{padding:12px 16px;border-radius:6px;margin-bottom:16px;font-size:14px;border:1px solid}
.alert-err{background:#fef2f2;color:#991b1b;border-color:#fecaca}

.empty{text-align:center;padding:48px;color:var(--text-dim)}

.toolbar{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap;align-items:center}
.toolbar input,.toolbar select{
  background:var(--surface);
  border:1px solid var(--border-strong);
  border-radius:6px;
  padding:6px 10px;
  color:var(--text);
  font-size:13px;
}
.toolbar input:focus,.toolbar select:focus{outline:none;border-color:var(--primary)}

.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-bottom:24px}
.stat{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:10px;
  padding:20px;
  box-shadow:var(--shadow);
  border-top:3px solid var(--primary);
}
.stat-num{font-size:32px;font-weight:700;color:var(--primary);margin-bottom:4px;line-height:1}
.stat-lbl{font-size:13px;color:var(--text-dim)}

.history-item{
  padding:12px;
  border-left:3px solid var(--border);
  margin-bottom:8px;
  background:var(--surface-2);
  border-radius:0 6px 6px 0;
}
.history-item.create{border-left-color:var(--success);background:#f0fdf4}
.history-item.update{border-left-color:var(--primary);background:var(--primary-light)}
.history-item.delete{border-left-color:var(--danger);background:#fef2f2}
.history-meta{font-size:12px;color:var(--text-dim);margin-bottom:6px}
.history-diff{
  font-family:'Cascadia Mono','Consolas',monospace;
  font-size:12px;
  color:var(--text);
  white-space:pre-wrap;
  background:var(--surface);
  border:1px solid var(--border);
  padding:8px 12px;
  border-radius:4px;
  margin-top:6px;
  max-height:200px;
  overflow:auto;
}

/* login page */
.login-bg{
  background:linear-gradient(135deg, #4e73df 0%, #224abe 60%, #1a2c6b 100%);
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:20px;
}
.login-card{
  background:var(--surface);
  padding:40px;
  border-radius:14px;
  width:100%;
  max-width:380px;
  border:1px solid var(--border);
  box-shadow:var(--shadow-lg);
}

code{
  background:var(--surface-2);
  padding:2px 6px;
  border-radius:4px;
  font-size:12px;
  color:var(--primary);
  font-family:'Cascadia Mono','Consolas',monospace;
}