/* styles.css - Quản lý phòng trọ */
:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-border: #bfdbfe;
  --success: #16a34a;
  --success-light: #f0fdf4;
  --success-border: #bbf7d0;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --warning-border: #fde68a;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --danger-border: #fecaca;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.03);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: #f1f5f9;
  color: var(--slate-800);
  line-height: 1.5;
  font-size: 15px;
  min-height: 100vh;
  padding-bottom: 80px; /* Space for mobile nav */
}

@media (min-width: 768px) {
  body {
    padding-bottom: 24px;
  }
}

/* Header */
.app-header {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
  color: #ffffff;
  padding: 16px 20px;
  position: sticky;
  top: 0;
  z-index: 40;
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.15);
}

.header-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  background: rgba(255, 255, 255, 0.2);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.brand-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.brand-subtitle {
  font-size: 12px;
  opacity: 0.85;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Navigation */
.app-nav {
  background: #ffffff;
  border-bottom: 1px solid var(--slate-200);
  position: sticky;
  top: 74px;
  z-index: 30;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  gap: 4px;
  padding: 6px 16px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}
.nav-container::-webkit-scrollbar {
  display: none;
}

.nav-btn {
  background: transparent;
  border: none;
  font-size: 14px;
  font-weight: 600;
  color: var(--slate-600);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.15s ease;
  min-height: 44px;
}

.nav-btn:hover {
  background: var(--slate-100);
  color: var(--primary);
}

.nav-btn.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
}

.nav-badge {
  background: var(--slate-200);
  color: var(--slate-700);
  font-size: 11px;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  font-weight: 700;
}

.nav-btn.active .nav-badge {
  background: var(--primary);
  color: #fff;
}

/* Mobile Bottom Navigation */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #ffffff;
  border-top: 1px solid var(--slate-200);
  z-index: 50;
  padding: 6px 8px;
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.05);
}

@media (max-width: 767px) {
  .app-nav {
    display: none;
  }
  .mobile-bottom-nav {
    display: flex;
    justify-content: space-around;
  }
}

.m-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--slate-500);
  font-size: 11px;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex: 1;
  min-height: 52px;
}

.m-nav-item .m-icon {
  font-size: 20px;
  margin-bottom: 2px;
}

.m-nav-item.active {
  color: var(--primary);
}

/* Main Container */
.main-content {
  max-width: 1100px;
  margin: 20px auto;
  padding: 0 16px;
}

/* Notice / Sample Data Banner */
.sample-banner {
  background: #fefce8;
  border: 1px solid #fef08a;
  border-left: 5px solid #eab308;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.sample-banner-text {
  font-size: 13.5px;
  color: #713f12;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sample-banner-actions {
  display: flex;
  gap: 8px;
}

/* Cards */
.card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--slate-200);
  box-shadow: var(--shadow-sm);
  padding: 20px;
  margin-bottom: 20px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--slate-100);
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--slate-900);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-subtitle {
  font-size: 13px;
  color: var(--slate-500);
  margin-top: 2px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 14.5px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  min-height: 44px;
  text-decoration: none;
  user-select: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
  min-height: 36px;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 14px 24px;
  font-size: 16px;
  min-height: 52px;
  font-weight: 700;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
}
.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-success {
  background: var(--success);
  color: #ffffff;
}
.btn-success:hover {
  background: #15803d;
}

.btn-danger {
  background: var(--danger);
  color: #ffffff;
}
.btn-danger:hover {
  background: #b91c1c;
}

.btn-outline {
  background: #ffffff;
  border-color: var(--slate-300);
  color: var(--slate-700);
}
.btn-outline:hover {
  background: var(--slate-50);
  border-color: var(--slate-400);
}

.btn-outline-danger {
  background: #ffffff;
  border-color: var(--danger-border);
  color: var(--danger);
}
.btn-outline-danger:hover {
  background: var(--danger-light);
}

.btn-ghost {
  background: transparent;
  color: var(--slate-600);
}
.btn-ghost:hover {
  background: var(--slate-100);
  color: var(--slate-900);
}

/* Forms */
.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 640px) {
  .form-grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .form-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .form-grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--slate-700);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-label .req {
  color: var(--danger);
  margin-left: 2px;
}

.form-hint {
  font-size: 12px;
  color: var(--slate-500);
  margin-top: 2px;
}

.form-error-msg {
  font-size: 12.5px;
  color: var(--danger);
  font-weight: 600;
  display: none;
  align-items: center;
  gap: 4px;
  margin-top: 4px;
}

.form-error-msg.show {
  display: flex;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  font-size: 15px;
  border: 1.5px solid var(--slate-300);
  border-radius: var(--radius-md);
  background: #ffffff;
  color: var(--slate-900);
  min-height: 46px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-control.input-error {
  border-color: var(--danger);
  background-color: #fffaf0;
}
.form-control.input-error:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

.input-suffix {
  position: absolute;
  right: 14px;
  color: var(--slate-500);
  font-weight: 500;
  font-size: 13px;
  pointer-events: none;
}

.form-control.has-suffix {
  padding-right: 48px;
}

/* Stat Grid */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.stat-card {
  background: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.stat-icon.blue { background: var(--primary-light); color: var(--primary); }
.stat-icon.green { background: var(--success-light); color: var(--success); }
.stat-icon.amber { background: var(--warning-light); color: var(--warning); }
.stat-icon.slate { background: var(--slate-100); color: var(--slate-600); }

.stat-value {
  font-size: 20px;
  font-weight: 800;
  color: var(--slate-900);
  line-height: 1.2;
}

.stat-label {
  font-size: 12.5px;
  color: var(--slate-500);
  margin-top: 2px;
}

/* Room Cards Grid */
.rooms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.room-card {
  background: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.room-card:hover {
  box-shadow: var(--shadow-md);
}

.room-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.room-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--slate-900);
}

.room-tenant {
  font-size: 13px;
  color: var(--slate-500);
  margin-top: 3px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.badge-success { background: var(--success-light); color: var(--success); border: 1px solid var(--success-border); }
.badge-warning { background: var(--warning-light); color: var(--warning); border: 1px solid var(--warning-border); }
.badge-secondary { background: var(--slate-100); color: var(--slate-600); border: 1px solid var(--slate-200); }
.badge-primary { background: var(--primary-light); color: var(--primary); border: 1px solid var(--primary-border); }
.badge-sync-on { background: #dcfce7; color: #15803d; border: 1px solid #86efac; font-weight: 700; }
.badge-sync-off { background: rgba(255, 255, 255, 0.2); color: #ffffff; border: 1px solid rgba(255, 255, 255, 0.35); }

/* Conflict Modal Styles */
.conflict-compare-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 14px;
  margin: 14px 0;
}

@media (max-width: 550px) {
  .conflict-compare-box {
    grid-template-columns: 1fr;
  }
}

.conflict-col {
  background: #ffffff;
  border-radius: var(--radius-sm);
  padding: 12px;
  border: 1px solid var(--slate-200);
}

.conflict-col.remote {
  border-color: #93c5fd;
  background: #eff6ff;
}

.conflict-col.local {
  border-color: #fde68a;
  background: #fffbeb;
}

.room-info-row {
  display: flex;
  justify-content: space-between;
  font-size: 13.5px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--slate-200);
}

.room-info-label { color: var(--slate-500); }
.room-info-value { font-weight: 600; color: var(--slate-800); }

.room-actions {
  display: flex;
  gap: 8px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--slate-100);
}

/* Dynamic fee section */
.fees-container {
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-top: 8px;
}

.fee-row {
  display: grid;
  grid-template-columns: 1fr 140px 40px;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}

@media (max-width: 500px) {
  .fee-row {
    grid-template-columns: 1fr 110px 36px;
    gap: 6px;
  }
}

.fee-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
  margin-bottom: 12px;
}

.fee-chip-btn {
  background: #ffffff;
  border: 1px dashed var(--slate-300);
  color: var(--slate-700);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  cursor: pointer;
}
.fee-chip-btn:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* Calculation Breakdown Card */
.calc-summary-card {
  background: linear-gradient(135deg, #f8fafc 0%, #edf2f7 100%);
  border: 2px solid var(--primary-border);
  border-radius: var(--radius-lg);
  padding: 18px;
  margin-top: 20px;
}

.calc-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.calc-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  font-size: 14px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.calc-row-detail {
  font-size: 12.5px;
  color: var(--slate-500);
  margin-top: 2px;
}

.calc-row.grand-total {
  border-top: 2px solid var(--slate-400);
  border-bottom: none;
  padding-top: 14px;
  margin-top: 6px;
}

.grand-total-label {
  font-size: 16px;
  font-weight: 800;
  color: var(--slate-900);
}

.grand-total-val {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
}

/* Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--slate-200);
}

.custom-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
  white-space: nowrap;
}

.custom-table th {
  background: var(--slate-50);
  padding: 12px 14px;
  font-weight: 700;
  color: var(--slate-700);
  border-bottom: 1px solid var(--slate-200);
}

.custom-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--slate-100);
  color: var(--slate-800);
}

.custom-table tr:hover {
  background: #fcfdfe;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(2px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  background: #ffffff;
  width: 100%;
  max-width: 580px;
  max-height: 90vh;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(16px);
  transition: transform 0.2s ease;
}

.modal-overlay.open .modal-dialog {
  transform: translateY(0);
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--slate-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--slate-900);
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
}

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--slate-200);
  background: var(--slate-50);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* Toast */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: #ffffff;
  color: var(--slate-900);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  border-left: 4px solid var(--primary);
  min-width: 280px;
  max-width: 380px;
  pointer-events: auto;
  animation: slideIn 0.2s ease forwards;
}

.toast.success { border-left-color: var(--success); }
.toast.danger { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }

@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Bill Print / Receipt Preview */
.receipt-box {
  background: #ffffff;
  border: 1px dashed var(--slate-300);
  border-radius: var(--radius-md);
  padding: 20px;
  font-family: inherit;
}

.receipt-header {
  text-align: center;
  border-bottom: 2px dashed var(--slate-300);
  padding-bottom: 14px;
  margin-bottom: 14px;
}

.receipt-title {
  font-size: 18px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--slate-900);
}

.receipt-subtitle {
  font-size: 13px;
  color: var(--slate-500);
}

.receipt-items {
  margin: 14px 0;
}

.receipt-item-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 13.5px;
}

.receipt-item-row.bold {
  font-weight: 700;
  color: var(--slate-900);
}

.receipt-total-row {
  border-top: 2px dashed var(--slate-400);
  margin-top: 10px;
  padding-top: 12px;
  display: flex;
  justify-content: space-between;
  font-size: 17px;
  font-weight: 800;
  color: var(--primary);
}

@media print {
  body * {
    visibility: hidden;
  }
  #printable-receipt, #printable-receipt * {
    visibility: visible;
  }
  #printable-receipt {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    margin: 0;
    padding: 20px;
    border: none;
  }
}

/* Helpers */
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-muted { color: var(--slate-500); }
.font-bold { font-weight: 700; }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-primary { color: var(--primary); }
.hidden { display: none !important; }