/* ================================================================
   Thiên Tâm — Design System v2
   Xây trên nền Bootstrap 5.3 + Be Vietnam Pro
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

/* ================================================================
   DESIGN TOKENS
   ================================================================ */
:root {
  /* Brand */
  --tt-brand:      #1a3c5e;
  --tt-brand-dk:   #0d2d4b;
  --tt-brand-md:   #2567aa;
  --tt-brand-soft: #dbeafe;
  --tt-brand-tint: #eff6ff;

  /* Interactive accent — bright blue cho buttons, active states, focus rings */
  --tt-accent:      #2563eb;
  --tt-accent-dk:   #1d4ed8;
  --tt-accent-soft: #eff6ff;
  --tt-accent-mute: #dbeafe;

  /* Bootstrap override — primary = accent blue (không phải brand navy) */
  --bs-primary:          #2563eb;
  --bs-primary-rgb:      37, 99, 235;
  --bs-link-color:       #2563eb;
  --bs-link-hover-color: #1d4ed8;

  /* Semantic colors */
  --tt-success:    #16a34a;
  --tt-success-bg: #dcfce7;
  --tt-warning:    #d97706;
  --tt-warning-bg: #fef3c7;
  --tt-danger:     #dc2626;
  --tt-danger-bg:  #fee2e2;
  --tt-info:       #0891b2;
  --tt-info-bg:    #e0f2fe;
  --tt-purple:     #7c3aed;
  --tt-purple-bg:  #ede9fe;
  --tt-orange:     #ea580c;
  --tt-orange-bg:  #fff7ed;

  /* Surfaces */
  --tt-surface:   #f8fafc;
  --tt-surface-2: #f1f5f9;
  --tt-surface-3: #e8edf3;
  --tt-white:     #ffffff;

  /* Borders */
  --tt-border:   #e2e8f0;
  --tt-border-2: #cbd5e1;

  /* Text */
  --tt-text-1: #0f172a;
  --tt-text-2: #334155;
  --tt-text-3: #64748b;
  --tt-text-4: #94a3b8;

  /* Radius */
  --tt-r-xs: 4px;
  --tt-r-sm: 6px;
  --tt-r:    10px;
  --tt-r-lg: 14px;
  --tt-r-xl: 18px;

  /* Shadow */
  --tt-sh-xs: 0 1px 2px rgba(15,23,42,.06);
  --tt-sh-sm: 0 1px 3px rgba(15,23,42,.08), 0 1px 2px rgba(15,23,42,.05);
  --tt-sh:    0 4px 12px rgba(15,23,42,.08), 0 2px 4px rgba(15,23,42,.05);
  --tt-sh-lg: 0 10px 30px rgba(15,23,42,.1), 0 4px 12px rgba(15,23,42,.06);

  /* Transition */
  --tt-ease: cubic-bezier(.4, 0, .2, 1);
  --tt-t:    .15s var(--tt-ease);
}

/* ================================================================
   BASE
   ================================================================ */
body {
  font-family: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', sans-serif;
  background: var(--tt-surface);
  color: var(--tt-text-1);
  font-size: .9rem;
  -webkit-font-smoothing: antialiased;
}

/* ================================================================
   TOP BAR
   ================================================================ */
.top-bar {
  background: linear-gradient(135deg, var(--tt-brand-dk) 0%, var(--tt-brand) 55%, var(--tt-brand-md) 100%);
  border-bottom: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 2px 12px rgba(0,0,0,.2);
}

/* ================================================================
   SIDEBAR NAV
   ================================================================ */
.sidebar-nav {
  min-width: 220px;
  gap: 1px;
  background: #f4f8ff;
  border: 1px solid var(--tt-border);
  border-radius: var(--tt-r-lg);
  padding: .375rem;
}

.sidebar-nav .nav-link {
  text-align: left;
  color: var(--tt-text-2);
  font-size: .865rem;
  font-weight: 500;
  padding: .5rem .875rem;
  border-radius: var(--tt-r-sm);
  white-space: nowrap;
  transition: background var(--tt-t), color var(--tt-t), border-color var(--tt-t);
  border: 1px solid transparent;
  position: relative;
}

.sidebar-nav .nav-link:hover {
  background: var(--tt-accent-soft);
  color: var(--tt-accent);
  border-color: var(--tt-accent-mute);
}

.sidebar-nav .nav-link.active {
  background: var(--tt-accent);
  color: #fff;
  border-color: var(--tt-accent);
  box-shadow: 0 2px 8px rgba(37,99,235,.22);
}

.sidebar-nav .nav-link .badge {
  font-size: .65em;
  font-weight: 600;
  opacity: .8;
}

.sidebar-nav .nav-link.active .badge {
  background: rgba(255,255,255,.25) !important;
}

.sidebar-group {
  font-size: .675rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--tt-text-4);
  letter-spacing: .09em;
  padding: .9rem .875rem .28rem;
}

/* ================================================================
   CARDS
   ================================================================ */
.card {
  border: 1px solid var(--tt-border);
  border-radius: var(--tt-r);
  box-shadow: var(--tt-sh-sm);
}

.stat-card {
  border-radius: var(--tt-r-lg) !important;
  border: 1px solid var(--tt-border) !important;
  box-shadow: var(--tt-sh-sm) !important;
  background: var(--tt-white);
  transition: transform var(--tt-t), box-shadow var(--tt-t);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--tt-sh) !important;
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--tt-r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.card-header {
  background: var(--tt-surface-2);
  border-bottom: 1px solid var(--tt-border);
  font-size: .82rem;
  font-weight: 600;
  color: var(--tt-text-2);
}

.card-header.bg-transparent {
  background: var(--tt-surface-2) !important;
}

/* ================================================================
   TAB CONTENT
   ================================================================ */
.tab-content {
  background: var(--tt-white);
  border: 1px solid var(--tt-border);
  border-radius: var(--tt-r-lg);
  box-shadow: var(--tt-sh-sm);
}

/* ================================================================
   SUBSECTION HEADER
   ================================================================ */
.subsec-hdr {
  font-weight: 700;
  font-size: .95rem;
  color: var(--tt-text-1);
  border-bottom: 2px solid var(--tt-border);
  padding-bottom: .5rem;
  margin: 0 0 1rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}

.subsec-hdr:not(:first-child) { margin-top: 2rem; }

/* ================================================================
   TABLES
   ================================================================ */
.table {
  font-size: .855rem;
  color: var(--tt-text-2);
}

.table th {
  white-space: nowrap;
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--tt-text-3);
  vertical-align: middle;
  border-bottom-width: 1px;
}

.table td {
  vertical-align: middle;
  border-color: var(--tt-border);
}

.table-light th {
  background: var(--tt-surface-2) !important;
  color: var(--tt-text-3);
}

/* Header bảng tối — đồng bộ navy thương hiệu (thay đen #212529 của Bootstrap) */
.table-dark,
thead.table-dark {
  --bs-table-bg: #1a3c5e;
  --bs-table-color: #fff;
  --bs-table-border-color: #2b507a;
}

.table-dark th,
thead.table-dark th {
  background: #1a3c5e;
  color: #fff;
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  border-color: #2b507a;
  vertical-align: middle;
}

thead.table-dark th.bg-primary,
thead.table-dark .bg-primary {
  background: #2b507a !important;
}

.table-hover tbody tr {
  transition: background var(--tt-t);
}

.table-hover tbody tr:hover {
  background: var(--tt-accent-soft) !important;
}

th.sortable {
  cursor: pointer;
  user-select: none;
}

th.sortable:hover {
  background: var(--tt-accent-soft) !important;
  color: var(--tt-accent) !important;
}

/* ================================================================
   PROGRESS BARS
   ================================================================ */
.progress {
  height: 8px;
  border-radius: 99px;
  background: var(--tt-border);
  overflow: hidden;
}

.progress-bar {
  border-radius: 99px;
  font-size: 0;
  transition: width .4s ease;
}

/* Preserve legacy 16px usage */
.progress[style*="height:16px"],
.progress[style*="height: 16px"] {
  height: 16px !important;
  border-radius: var(--tt-r-xs) !important;
}

.progress[style*="height:16px"] .progress-bar,
.progress[style*="height: 16px"] .progress-bar {
  font-size: .65rem !important;
  line-height: 16px !important;
}

/* ================================================================
   BADGES
   ================================================================ */
.badge {
  font-weight: 600;
  letter-spacing: .015em;
}

.badge-hang { font-size: .72em; }

.badge-active {
  background: var(--tt-success-bg) !important;
  color: var(--tt-success) !important;
}

.badge-maintenance {
  background: var(--tt-orange-bg) !important;
  color: var(--tt-orange) !important;
}

.badge-inactive {
  background: var(--tt-surface-2) !important;
  color: var(--tt-text-3) !important;
}

.badge-manual {
  background: var(--tt-accent-soft) !important;
  color: var(--tt-accent) !important;
}

.badge-auto {
  background: var(--tt-purple-bg) !important;
  color: var(--tt-purple) !important;
}

/* ================================================================
   BUTTONS
   ================================================================ */
.btn {
  font-weight: 500;
  transition: all var(--tt-t);
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--tt-accent);
  border-color: var(--tt-accent);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--tt-accent-dk);
  border-color: var(--tt-accent-dk);
  box-shadow: 0 4px 12px rgba(37,99,235,.28);
}

.btn-outline-primary {
  color: var(--tt-accent);
  border-color: var(--tt-accent);
}

.btn-outline-primary:hover {
  background: var(--tt-accent);
  border-color: var(--tt-accent);
}

/* ================================================================
   FORM CONTROLS
   ================================================================ */
.form-control,
.form-select {
  border-color: var(--tt-border-2);
  color: var(--tt-text-1);
  background-color: var(--tt-white);
  transition: border-color var(--tt-t), box-shadow var(--tt-t);
}

.form-control::placeholder { color: var(--tt-text-4); }

.form-control:focus,
.form-select:focus {
  border-color: var(--tt-accent);
  box-shadow: 0 0 0 .2rem rgba(37,99,235,.12);
  background-color: var(--tt-white);
}

.form-label {
  font-weight: 600;
  font-size: .83rem;
  color: var(--tt-text-2);
  margin-bottom: .3rem;
}

.input-group-text {
  background: var(--tt-surface-2);
  border-color: var(--tt-border-2);
  color: var(--tt-text-3);
}

/* ================================================================
   MODALS
   ================================================================ */
.modal-content {
  border: 1px solid var(--tt-border);
  border-radius: var(--tt-r-lg);
  box-shadow: var(--tt-sh-lg);
}

.modal-header {
  background: var(--tt-surface-2);
  border-bottom: 1px solid var(--tt-border);
  border-radius: var(--tt-r-lg) var(--tt-r-lg) 0 0;
  padding: .875rem 1.25rem;
}

.modal-title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--tt-text-1);
}

.modal-footer {
  background: var(--tt-surface-2);
  border-top: 1px solid var(--tt-border);
  border-radius: 0 0 var(--tt-r-lg) var(--tt-r-lg);
}

/* ================================================================
   ALERTS
   ================================================================ */
.alert {
  border-radius: var(--tt-r);
  border-width: 1px;
}

.alert-info {
  background: var(--tt-info-bg);
  border-color: #a5f3fc;
  color: #0e7490;
}

.alert-warning {
  background: var(--tt-warning-bg);
  border-color: #fde68a;
  color: #92400e;
}

.alert-danger {
  background: var(--tt-danger-bg);
  border-color: #fca5a5;
  color: #991b1b;
}

.alert-success {
  background: var(--tt-success-bg);
  border-color: #86efac;
  color: #166534;
}

/* ================================================================
   DROPDOWN
   ================================================================ */
.dropdown-menu {
  border: 1px solid var(--tt-border);
  border-radius: var(--tt-r);
  box-shadow: var(--tt-sh);
  padding: .375rem;
}

.dropdown-item {
  font-size: .875rem;
  border-radius: var(--tt-r-xs);
  transition: background var(--tt-t);
  padding: .45rem .875rem;
}

.dropdown-item:hover { background: var(--tt-surface-2); }

.dropdown-header {
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--tt-text-4);
  padding: .375rem .875rem .25rem;
}

.dropdown-divider { border-color: var(--tt-border); margin: .25rem 0; }

/* ================================================================
   LOADING OVERLAY
   ================================================================ */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(248,250,252,.9);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

/* ================================================================
   CHART
   ================================================================ */
.chart-box { position: relative; height: 280px; }

/* ================================================================
   XE / VEHICLE DETAILS
   ================================================================ */
.xe-detail-row td {
  background: var(--tt-surface-2) !important;
  padding: 1rem !important;
}

.xe-expire-warn { background: #fffbeb !important; }
.xe-expire-over { background: #fef2f2 !important; }
.xe-info-group  { font-size: .82rem; }
.xe-info-group .label {
  color: var(--tt-text-3);
  font-size: .73rem;
  margin-bottom: 1px;
}

/* ================================================================
   PHIEU MUON
   ================================================================ */
.pm-stat-card {
  border-radius: var(--tt-r);
  border: 1px solid var(--tt-border);
  box-shadow: var(--tt-sh-xs);
  transition: transform var(--tt-t), box-shadow var(--tt-t);
}

.pm-stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--tt-sh);
}

.pm-stat-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--tt-r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

#pm-body tr td:first-child { width: 4px; padding: 0; border-right: none; }
#pm-body tr.pm-row-returned { opacity: .6; }

/* ================================================================
   SCROLLBAR
   ================================================================ */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--tt-border-2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--tt-text-4); }

/* ================================================================
   UTILITY OVERRIDES
   ================================================================ */
.text-muted { color: var(--tt-text-3) !important; }
.border     { border-color: var(--tt-border) !important; }

/* Nav tabs in pages that use horizontal tabs */
.nav-tabs .nav-link {
  font-weight: 600;
  font-size: .875rem;
  color: var(--tt-text-3);
  border-radius: var(--tt-r-sm) var(--tt-r-sm) 0 0;
  transition: color var(--tt-t), background var(--tt-t);
}

.nav-tabs .nav-link:hover {
  color: var(--tt-accent);
  background: var(--tt-accent-soft);
}

.nav-tabs .nav-link.active {
  color: var(--tt-accent);
  font-weight: 700;
  background: var(--tt-white);
  border-color: var(--tt-border) var(--tt-border) var(--tt-white);
}

/* Toast / Toasts container */
.toast-container { position: fixed; top: 70px; right: 16px; z-index: 9999; }

/* ================================================================
   PAGE HERO (tn-register, nhan-vien, và các trang phụ)
   ================================================================ */
.page-hero {
  background: linear-gradient(145deg, #0d2d4b 0%, #1a3c5e 42%, #2567aa 100%);
  color: #fff;
  padding: 2rem 0 3.5rem;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -8%;
  width: 42%;
  height: 170%;
  background: radial-gradient(ellipse, rgba(255,255,255,.07) 0%, transparent 68%);
  pointer-events: none;
}

.page-hero h4,
.page-hero h3 {
  font-size: 1.3rem;
  letter-spacing: -.01em;
  font-weight: 700;
}

.page-hero .hero-eyebrow {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .09em;
  color: rgba(255,255,255,.55);
  margin-bottom: .5rem;
}

/* Hero glass stat tile */
.hero-stat {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--tt-r);
  padding: .75rem 1.25rem;
  text-align: center;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  min-width: 90px;
}

.hero-stat .num {
  font-size: 1.6rem;
  font-weight: 800;
  line-height: 1;
  color: #fff;
}

.hero-stat .lbl {
  font-size: .7rem;
  color: rgba(255,255,255,.65);
  margin-top: .25rem;
}

/* ================================================================
   CARD-HDR (dùng trong tn-register, nhan-vien)
   ================================================================ */
.card-hdr {
  background: var(--tt-surface-2);
  border-bottom: 1px solid var(--tt-border);
  border-radius: var(--tt-r) var(--tt-r) 0 0;
  padding: .65rem 1.25rem;
  font-size: .74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--tt-text-3);
  display: flex;
  align-items: center;
  gap: .5rem;
}

/* ================================================================
   EMPTY STATE
   ================================================================ */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
}

.empty-state-icon {
  width: 72px;
  height: 72px;
  background: var(--tt-accent-soft);
  border: 2px solid var(--tt-accent-mute);
  border-radius: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--tt-accent);
  margin-bottom: 1.25rem;
}

.empty-state h5 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--tt-text-2);
  margin-bottom: .4rem;
}

.empty-state p {
  color: var(--tt-text-3);
  font-size: .875rem;
  margin-bottom: 1.5rem;
}

/* ================================================================
   ALERT SUMMARY (overview tab)
   ================================================================ */
.alert-item {
  display: flex;
  align-items: center;
  gap: .625rem;
  padding: .5rem .75rem;
  border-radius: var(--tt-r-sm);
  font-size: .84rem;
  transition: background var(--tt-t);
}

.alert-item:hover { background: var(--tt-surface); }

/* ================================================================
   IMPORT STEPS
   ================================================================ */
.import-step {
  display: none;
}
.import-step.active {
  display: block;
}