:root{
  --bg:#F5F2EA;
  --surface:#FFFFFF;
  --surface-alt:#FBF8F1;
  --ink:#211F1B;
  --muted:#726C5F;
  --line:#E4DECB;
  --primary:#1F4D3C;
  --primary-dark:#153629;
  --primary-tint:#DCE7DF;
  --accent:#C6862F;
  --accent-tint:#F3E1C2;
  --available:#2E7D4F;
  --occupied:#B0452E;
  --reserved:#3B5E86;
  --maintenance:#8A6A2C;
  --radius:12px;
  --shadow:0 4px 16px rgba(21,54,41,0.08);
  --font-display:'Fraunces', serif;
  --font-body:'Public Sans', sans-serif;
  --font-mono:'JetBrains Mono', monospace;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-display);margin:0;color:var(--primary-dark);}
button{font-family:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;}
.hidden{display:none !important;}

/* ---------- LOCK SCREEN ---------- */
.lock-screen{
  min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  background:
    radial-gradient(circle at 20% 20%, rgba(198,134,47,0.10), transparent 45%),
    radial-gradient(circle at 80% 80%, rgba(31,77,60,0.14), transparent 50%),
    var(--primary-dark);
  padding:24px;
}
.lock-card{
  background:var(--surface);
  border-radius:16px;
  padding:40px 36px;
  width:100%;max-width:360px;
  text-align:center;
  box-shadow:0 20px 60px rgba(0,0,0,0.35);
}
.lock-mark{
  width:56px;height:56px;border-radius:50%;
  background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-weight:600;font-size:20px;
  margin:0 auto 16px;
}
.lock-card h1{font-size:26px;margin-bottom:4px;}
.lock-sub{color:var(--muted);margin:0 0 24px;font-size:14px;}
#lock-form{display:flex;gap:8px;}
#lock-pin{
  flex:1;padding:12px 14px;border-radius:10px;border:1px solid var(--line);
  font-size:16px;letter-spacing:2px;text-align:center;
}
#lock-form button{
  padding:12px 18px;border:none;border-radius:10px;background:var(--accent);color:#fff;font-weight:600;
  white-space:nowrap;flex-shrink:0;
}
.lock-hint{color:var(--occupied);font-size:13px;min-height:18px;margin:10px 0 0;}
.lock-note{font-size:12px;color:var(--muted);margin-top:18px;}

/* ---------- APP SHELL ---------- */
.app{display:flex;min-height:100vh;}
.sidebar{
  width:230px;flex-shrink:0;
  background:var(--primary-dark);color:#fff;
  display:flex;flex-direction:column;
  padding:24px 16px;
}
.brand{display:flex;align-items:center;gap:10px;padding:0 6px 24px;}
.brand-mark{
  width:36px;height:36px;border-radius:10px;background:var(--accent);
  display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-weight:700;
  flex-shrink:0;
}
.brand-name{font-family:var(--font-display);font-size:16px;font-weight:600;line-height:1.2;}
.brand-sub{font-size:11px;color:rgba(255,255,255,0.55);letter-spacing:0.06em;text-transform:uppercase;}
.nav{display:flex;flex-direction:column;gap:2px;flex:1;}
.nav-btn{
  display:flex;align-items:center;gap:10px;
  background:none;border:none;color:rgba(255,255,255,0.72);
  padding:11px 12px;border-radius:9px;text-align:left;font-size:14.5px;font-weight:500;
  transition:background 0.15s, color 0.15s;
}
.nav-ico{width:18px;text-align:center;font-size:15px;}
.nav-btn:hover{background:rgba(255,255,255,0.06);color:#fff;}
.nav-btn.active{background:var(--accent);color:#fff;}
.lock-btn{
  background:none;border:1px solid rgba(255,255,255,0.2);color:rgba(255,255,255,0.7);
  padding:8px;border-radius:9px;font-size:12.5px;width:100%;margin-top:8px;
}
.lock-btn:hover{border-color:rgba(255,255,255,0.4);color:#fff;}
.session-info{
  margin-top:auto;padding:10px 4px 6px;border-top:1px solid rgba(255,255,255,0.12);
  font-size:12px;color:rgba(255,255,255,0.6);
}
.session-info .session-name{color:#fff;font-weight:600;font-size:13px;}
.session-info .session-role{
  display:inline-block;margin-top:3px;padding:2px 8px;border-radius:20px;font-size:10.5px;
  background:rgba(255,255,255,0.12);color:rgba(255,255,255,0.85);text-transform:uppercase;letter-spacing:0.04em;
}
.sync-dot{
  display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--available);
  margin-right:6px;vertical-align:middle;transition:background 0.3s;
}
.sync-dot.stale{background:var(--maintenance);}
.sync-dot.error{background:var(--occupied);}
.admin-only-note{font-size:12.5px;color:var(--muted);font-style:italic;}

.main{flex:1;min-width:0;padding:0 32px 48px;}
.topbar{
  display:flex;align-items:center;gap:16px;
  padding:24px 0 20px;position:sticky;top:0;background:var(--bg);z-index:5;
}
.hamburger{display:none;background:none;border:none;font-size:20px;}
.topbar-title{font-family:var(--font-display);font-size:22px;font-weight:600;color:var(--primary-dark);}
.topbar-date{color:var(--muted);font-size:13px;margin-left:4px;flex:1;font-family:var(--font-mono);}

.btn{
  border:none;border-radius:9px;padding:10px 16px;font-size:13.5px;font-weight:600;
}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:#B4791F;}
.btn-ghost{background:var(--surface);border:1px solid var(--line);color:var(--primary-dark);}
.btn-ghost:hover{background:var(--primary-tint);}
.btn-danger{background:#fff;border:1px solid var(--occupied);color:var(--occupied);}
.btn-danger:hover{background:var(--occupied);color:#fff;}
.file-btn{display:inline-flex;align-items:center;}

/* ---------- VIEWS ---------- */
.view{display:none;}
.view.active{display:block;}

.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px;}
.stat-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;box-shadow:var(--shadow);
}
.stat-label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:0.05em;margin-bottom:6px;}
.stat-value{font-family:var(--font-display);font-size:26px;font-weight:600;color:var(--primary-dark);}

.panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;margin-bottom:20px;box-shadow:var(--shadow);
}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap;}
.panel-head h2{font-size:17px;}
.panel-head h4{font-size:14px;color:var(--primary-dark);margin-top:18px;}

.legend{display:flex;gap:14px;font-size:12.5px;color:var(--muted);}
.legend span{display:flex;align-items:center;gap:5px;}
.dot{width:9px;height:9px;border-radius:50%;display:inline-block;}
.dot-available{background:var(--available);}
.dot-occupied{background:var(--occupied);}
.dot-reserved{background:var(--reserved);}
.dot-maintenance{background:var(--maintenance);}

/* Signature element: room key-tag board */
.room-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:16px 14px;
}
.room-tag{
  position:relative;border-radius:12px 12px 5px 5px;
  padding:20px 8px 12px;text-align:center;color:#fff;cursor:pointer;
  transition:transform 0.12s;
}
.room-tag:hover{transform:translateY(-2px);}
.room-tag::before{
  content:'';position:absolute;top:8px;left:50%;transform:translateX(-50%);
  width:9px;height:9px;border-radius:50%;background:var(--bg);
  box-shadow:0 0 0 2px rgba(0,0,0,0.18) inset;
}
.room-tag .rt-num{font-family:var(--font-display);font-weight:700;font-size:18px;}
.room-tag .rt-type{font-size:10.5px;opacity:0.9;text-transform:uppercase;letter-spacing:0.04em;margin-top:2px;}
.room-tag.available{background:var(--available);}
.room-tag.occupied{background:var(--occupied);}
.room-tag.reserved{background:var(--reserved);}
.room-tag.maintenance{background:var(--maintenance);}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px;}

.table-wrap{overflow-x:auto;}
.table{width:100%;border-collapse:collapse;font-size:13.5px;}
.table th{
  text-align:left;font-size:11.5px;text-transform:uppercase;letter-spacing:0.04em;
  color:var(--muted);border-bottom:1px solid var(--line);padding:8px 10px;
}
.table td{padding:10px;border-bottom:1px solid var(--line);}
.table tbody tr:hover{background:var(--surface-alt);}
.table .muted-row td{color:var(--muted);text-align:center;padding:20px;}

.badge{
  display:inline-block;padding:3px 9px;border-radius:20px;font-size:11px;font-weight:600;
}
.badge-reserved{background:#E4ECF5;color:var(--reserved);}
.badge-checked-in{background:#E2EFE6;color:var(--available);}
.badge-checked-out{background:#EEEBE3;color:var(--muted);}
.badge-cancelled{background:#F5E4E0;color:var(--occupied);}
.badge-unpaid{background:#F5E4E0;color:var(--occupied);}
.badge-partial{background:var(--accent-tint);color:var(--accent);}
.badge-paid{background:#E2EFE6;color:var(--available);}
.badge-void{background:#EEEBE3;color:var(--muted);text-decoration:line-through;}
.badge-assistant{background:var(--accent-tint);color:var(--accent);}

.link-btn{background:none;border:none;color:var(--primary);font-weight:600;font-size:13px;padding:4px 6px;}
.link-btn:hover{text-decoration:underline;}
.icon-btn{background:none;border:none;font-size:14px;padding:4px 6px;color:var(--muted);}
.icon-btn:hover{color:var(--occupied);}

.filter-row{display:flex;gap:8px;}
.filter-row input, .filter-row select{padding:8px 10px;border-radius:8px;border:1px solid var(--line);font-size:13px;}
#guest-search, #billing-filter-status{padding:8px 10px;border-radius:8px;border:1px solid var(--line);font-size:13px;}

.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 16px;}
.form-grid label{display:flex;flex-direction:column;gap:5px;font-size:13px;color:var(--muted);font-weight:600;}
.form-grid input, .form-grid select, .form-grid textarea{
  padding:9px 11px;border-radius:8px;border:1px solid var(--line);font-size:14px;color:var(--ink);font-weight:400;
  font-family:var(--font-body);
}
.form-grid input.readonly-field{background:var(--surface-alt);color:var(--muted);}
.form-grid .span-2{grid-column:1/-1;}
.form-actions{grid-column:1/-1;display:flex;gap:10px;justify-content:flex-end;margin-top:6px;flex-wrap:wrap;}
.form-error{color:var(--occupied);font-size:13px;grid-column:1/-1;}
.hint-text{font-size:12.5px;color:var(--muted);margin:0 0 14px;line-height:1.5;}

/* ---------- MODALS ---------- */
.modal-overlay{
  position:fixed;inset:0;background:rgba(21,20,17,0.5);
  display:flex;align-items:center;justify-content:center;padding:20px;z-index:50;
}
.modal{
  background:var(--surface);border-radius:14px;padding:24px 26px;width:100%;max-width:560px;
  max-height:90vh;overflow-y:auto;box-shadow:0 30px 80px rgba(0,0,0,0.35);
}
.modal-wide{max-width:640px;}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.modal-head h3{font-size:18px;}
.modal-close{background:none;border:none;font-size:22px;color:var(--muted);line-height:1;}
.modal-close:hover{color:var(--occupied);}

.charge-row{display:flex;gap:8px;margin-bottom:14px;}
.charge-row input, .charge-row select{
  padding:9px 10px;border-radius:8px;border:1px solid var(--line);font-size:13.5px;
}
.charge-row input[type="text"]{flex:2;}
.charge-row input[type="number"]{flex:1;}

/* ---------- INVOICE ---------- */
.invoice{font-family:var(--font-body);}
.invoice-head{
  display:flex;justify-content:space-between;align-items:flex-start;
  border-bottom:2px dashed var(--line);padding-bottom:16px;margin-bottom:16px;
}
.invoice-head h2{font-family:var(--font-display);font-size:20px;}
.invoice-head .inv-meta{text-align:right;font-family:var(--font-mono);font-size:12.5px;color:var(--muted);}
.invoice-parties{display:flex;justify-content:space-between;margin-bottom:18px;font-size:13px;}
.invoice-parties strong{display:block;color:var(--primary-dark);font-family:var(--font-display);font-size:14px;margin-bottom:2px;}
.invoice table{width:100%;border-collapse:collapse;font-size:13.5px;margin-bottom:14px;}
.invoice th{text-align:left;font-size:11px;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--line);padding:6px 4px;}
.invoice td{padding:7px 4px;border-bottom:1px solid var(--line);font-family:var(--font-mono);font-size:13px;}
.invoice td.desc{font-family:var(--font-body);}
.invoice .totals{margin-left:auto;width:260px;font-family:var(--font-mono);font-size:13.5px;}
.invoice .totals div{display:flex;justify-content:space-between;padding:4px 0;}
.invoice .totals .grand{border-top:2px dashed var(--line);margin-top:6px;padding-top:8px;font-weight:700;font-size:15px;color:var(--primary-dark);}
.invoice .totals .discount-line{color:var(--accent);}
.invoice .payments{margin-top:14px;font-size:12.5px;color:var(--muted);}

.toast{
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%);
  background:var(--primary-dark);color:#fff;padding:11px 20px;border-radius:9px;font-size:13.5px;
  box-shadow:0 10px 30px rgba(0,0,0,0.25);z-index:100;
}

/* ---------- RESPONSIVE ---------- */
.sidebar-backdrop{
  display:none;position:fixed;inset:0;background:rgba(21,20,17,0.45);z-index:35;
}
@media (max-width:900px){
  .stat-row{grid-template-columns:repeat(2,1fr);}
  .two-col{grid-template-columns:1fr;}
  .form-grid{grid-template-columns:1fr;}
}
@media (max-width:760px){
  .sidebar{
    position:fixed;left:0;top:0;bottom:0;width:230px;
    transform:translateX(-100%);transition:transform 0.2s;z-index:40;
  }
  .sidebar.open{transform:translateX(0);}
  .sidebar.open ~ .sidebar-backdrop{display:block;}
  .hamburger{display:block;}
  .main{padding:0 16px 40px;width:100%;}
  .topbar{flex-wrap:wrap;padding-top:16px;gap:10px 12px;}
  .topbar-title{font-size:19px;}
  .topbar-date{display:none;}
  #btn-new-booking{margin-left:auto;}
  .panel{padding:16px;}
  .panel-head{gap:10px;}
  .legend{width:100%;order:3;flex-wrap:wrap;gap:8px 14px;}
  .filter-row{width:100%;flex-wrap:wrap;}
  .filter-row input, .filter-row select{flex:1 1 140px;}
  #guest-search{width:100%;}
  .modal{padding:20px 18px;max-width:100%;}
  .charge-row{flex-wrap:wrap;}
  .charge-row input[type="text"]{flex:1 1 100%;}
  .invoice-head{flex-direction:column;gap:10px;}
  .invoice-head .inv-meta{text-align:left;}
  .invoice-parties{flex-direction:column;gap:10px;}
  .invoice-parties > div:last-child{text-align:left;}
  .invoice .totals{width:100%;}
}
@media (max-width:480px){
  .stat-row{grid-template-columns:1fr 1fr;gap:10px;}
  .stat-card{padding:14px;}
  .stat-value{font-size:21px;}
  .room-grid{grid-template-columns:repeat(auto-fill,minmax(78px,1fr));gap:10px;}
  .table{font-size:12px;}
  .table th, .table td{padding:7px 6px;}
  .lock-card{padding:30px 22px;}
  .form-actions{justify-content:stretch;}
  .form-actions .btn{flex:1;}
  .btn-accent, .btn-ghost, .btn-danger{padding:10px 12px;}
  #btn-new-booking{width:100%;order:4;}
}

/* ---------- PRINT ---------- */
.print-letterhead{display:none;}
@media print{
  body *{visibility:hidden;}
  #invoice-content, #invoice-content *,
  .print-area, .print-area *{visibility:visible;}
  #invoice-content, .print-area{position:absolute;top:0;left:0;width:100%;}
  .no-print{display:none !important;}
  .print-letterhead{
    display:block;border-bottom:2px dashed var(--line);padding-bottom:14px;margin-bottom:18px;
  }
  .print-letterhead h2{font-family:var(--font-display);font-size:19px;margin:0 0 4px;}
  .print-letterhead .ph-meta{font-size:12px;color:var(--muted);}
  .print-letterhead .ph-period{font-size:12.5px;color:var(--ink);margin-top:4px;font-weight:600;}
}

/* warnings that must not be missed */
.alert-bar{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin:0 0 14px;padding:12px 14px;border-radius:10px;font-size:13.5px;line-height:1.45;}
.alert-bad{background:#F5E4E0;border:1px solid var(--occupied);color:#7A2A1A;}
#update-bar{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);z-index:60;background:var(--primary-dark);color:#fff;padding:10px 16px;border-radius:12px;font-size:13.5px;box-shadow:0 6px 24px rgba(0,0,0,.25);display:flex;gap:12px;align-items:center;}
#update-bar button{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:6px 12px;font-weight:600;cursor:pointer;}
@media print{ #global-alerts, #update-bar{display:none !important;} }