:root {
  --color-primary: #1a73e8;
  --color-primary-dark: #1557b0;
  --color-primary-light: #e8f0fe;
  --color-success: #0f9d58;
  --color-warning: #f4b400;
  --color-danger: #d93025;
  --color-gray-50: #f8f9fa;
  --color-gray-100: #f1f3f4;
  --color-gray-200: #e8eaed;
  --color-gray-300: #dadce0;
  --color-gray-400: #bdc1c6;
  --color-gray-500: #9aa0a6;
  --color-gray-600: #80868b;
  --color-gray-700: #5f6368;
  --color-gray-800: #3c4043;
  --color-gray-900: #202124;
  --color-white: #ffffff;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.1);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.12);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.15);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1200px;
  --header-height: 56px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background: var(--color-gray-50);
  color: var(--color-gray-900);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button {
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* Utility: container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px;
}

/* Loading screen */
.loading-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  color: var(--color-gray-500);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 12px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header__logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-gray-900);
}

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

.header__nav a,
.header__nav button {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-gray-700);
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  background: none;
  transition: background 0.2s;
}

.header__nav a:hover,
.header__nav button:hover {
  background: var(--color-gray-100);
  text-decoration: none;
}

/* Main content area */
.main {
  padding-top: calc(var(--header-height) + 16px);
  min-height: 100vh;
}

/* Button styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.938rem;
  border: 1px solid transparent;
  transition: all 0.2s;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
}

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

.btn--secondary {
  background: var(--color-white);
  color: var(--color-gray-700);
  border-color: var(--color-gray-300);
}

.btn--secondary:hover {
  background: var(--color-gray-50);
  border-color: var(--color-gray-400);
}

.btn--danger {
  background: var(--color-danger);
  color: var(--color-white);
}

.btn--danger:hover {
  background: #c62828;
}

.btn--sm {
  padding: 6px 12px;
  font-size: 0.813rem;
}

.btn--block {
  width: 100%;
}

/* Form elements */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-700);
  margin-bottom: 4px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  font-size: 0.938rem;
  color: var(--color-gray-900);
  background: var(--color-white);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-error {
  font-size: 0.813rem;
  color: var(--color-danger);
  margin-top: 4px;
}

/* Card */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  padding: 24px;
}

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

/* Table */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-gray-200);
  font-size: 0.875rem;
}

th {
  font-weight: 600;
  color: var(--color-gray-700);
  background: var(--color-gray-50);
  white-space: nowrap;
}

tr:hover td {
  background: var(--color-gray-50);
}

/* Toast notification */
.toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  font-weight: 500;
  min-width: 280px;
  max-width: 420px;
  animation: slideIn 0.3s ease;
}

.toast--success {
  background: var(--color-success);
  color: var(--color-white);
}

.toast--error {
  background: var(--color-danger);
  color: var(--color-white);
}

.toast--warning {
  background: var(--color-warning);
  color: var(--color-gray-900);
}

.toast--info {
  background: var(--color-primary);
  color: var(--color-white);
}

.toast__close {
  margin-left: auto;
  background: none;
  border: none;
  color: inherit;
  opacity: 0.8;
  font-size: 1.25rem;
  cursor: pointer;
}

.toast__close:hover {
  opacity: 1;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Page sections */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gray-900);
}

.page-subtitle {
  font-size: 0.938rem;
  color: var(--color-gray-500);
  margin-top: 2px;
}

/* Status badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge--inquiry {
  background: #fef3cd;
  color: #856404;
}

.badge--quotation {
  background: #cce5ff;
  color: #004085;
}

.badge--negotiation {
  background: #ffe0b2;
  color: #e65100;
}

.badge--confirmed {
  background: #d4edda;
  color: #155724;
}

.badge--completed {
  background: var(--color-gray-200);
  color: var(--color-gray-700);
}

.badge--cancelled {
  background: #f8d7da;
  color: #721c24;
}

/* Grid */
.grid {
  display: grid;
  gap: 16px;
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 16px;
}

.modal {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-gray-200);
}

.modal__title {
  font-size: 1.125rem;
  font-weight: 600;
}

.modal__close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-gray-500);
  cursor: pointer;
}

.modal__body {
  padding: 24px;
}

.modal__footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 16px 24px;
  border-top: 1px solid var(--color-gray-200);
}

/* Master Menu Layout */
.menu-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 16px;
  align-items: start;
}

.menu-sidebar {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-200);
  overflow: hidden;
}

.menu-category-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  cursor: pointer;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--color-gray-100);
  transition: background 0.15s;
}

.menu-category-item:last-child {
  border-bottom: none;
}

.menu-category-item:hover {
  background: var(--color-gray-50);
}

.menu-category-item.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
}

.menu-category-count {
  background: var(--color-gray-100);
  border-radius: 100px;
  padding: 1px 8px;
  font-size: 0.75rem;
  color: var(--color-gray-600);
}

.menu-category-item.active .menu-category-count {
  background: var(--color-primary);
  color: var(--color-white);
}

.menu-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  gap: 12px;
}

.menu-item-row.inactive {
  opacity: 0.5;
}

.menu-item-info {
  flex: 1;
  min-width: 0;
}

.menu-item-name {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
}

.menu-item-desc {
  display: block;
  font-size: 0.75rem;
  color: var(--color-gray-500);
  margin-top: 1px;
}

.menu-subgroup {
  margin-bottom: 8px;
}

.menu-subgroup:not(:last-child) {
  border-bottom: 1px solid var(--color-gray-100);
  padding-bottom: 8px;
}

.menu-subgroup-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-500);
  margin-bottom: 4px;
  padding: 4px 0;
}

.menu-item-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

/* Toggle switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 36px;
  height: 20px;
  cursor: pointer;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--color-gray-300);
  border-radius: 20px;
  transition: background 0.2s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 16px;
  width: 16px;
  left: 2px;
  bottom: 2px;
  background: var(--color-white);
  border-radius: 50%;
  transition: transform 0.2s;
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--color-primary);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(16px);
}

@media (max-width: 768px) {
  .menu-layout {
    grid-template-columns: 1fr;
  }
}

/* Calendar */
.calendar-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.calendar-nav h3 {
  font-size: 1.125rem;
  font-weight: 600;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
  background: var(--color-gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.calendar-day-header {
  background: var(--color-gray-50);
  padding: 8px 4px;
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-gray-600);
  text-transform: uppercase;
}

.calendar-cell {
  background: var(--color-white);
  min-height: 80px;
  padding: 4px;
  cursor: pointer;
  position: relative;
  transition: background 0.15s;
}

.calendar-cell:hover {
  background: var(--color-gray-50);
}

.calendar-cell.other-month {
  background: var(--color-gray-50);
}

.calendar-cell.other-month .cal-day-num {
  color: var(--color-gray-400);
}

.calendar-cell.today .cal-day-num {
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.cal-day-num {
  display: inline-block;
  font-size: 0.813rem;
  font-weight: 500;
  line-height: 24px;
  text-align: center;
  width: 24px;
}

.cal-dots {
  display: flex;
  gap: 2px;
  margin-top: 2px;
  flex-wrap: wrap;
}

.cal-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.cal-event-count {
  position: absolute;
  top: 2px;
  right: 4px;
  font-size: 0.688rem;
  color: var(--color-gray-500);
}

/* Event rows (in day detail / list) */
.event-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-gray-100);
  flex-wrap: wrap;
}

.event-row:last-child {
  border-bottom: none;
}

.event-row-actions {
  margin-left: auto;
}

@media (max-width: 768px) {
  .calendar-cell {
    min-height: 60px;
    padding: 2px;
  }

  .cal-day-num {
    font-size: 0.75rem;
    width: 20px;
    line-height: 20px;
  }

  .calendar-cell.today .cal-day-num {
    width: 20px;
    height: 20px;
  }

  .calendar-day-header {
    font-size: 0.688rem;
    padding: 4px 2px;
  }
}

/* Event Planner */
.menu-section {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  overflow: hidden;
}

.menu-section[open] {
  border-color: var(--color-primary);
}

.menu-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.938rem;
  background: var(--color-gray-50);
  user-select: none;
}

.menu-section-header:hover {
  background: var(--color-gray-100);
}

.menu-section-count {
  font-weight: 400;
  font-size: 0.75rem;
  color: var(--color-gray-500);
  background: var(--color-gray-200);
  padding: 1px 8px;
  border-radius: 100px;
}

.menu-section-body {
  padding: 12px 16px;
}

.menu-sub-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-500);
  margin: 8px 0 4px;
}

.menu-sub-label:first-child {
  margin-top: 0;
}

.menu-checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 4px;
}

.menu-checkbox-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.813rem;
  transition: background 0.15s;
}

.menu-checkbox-item:hover {
  background: var(--color-gray-50);
}

.menu-checkbox-item input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

@media (max-width: 600px) {
  .menu-checkbox-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 400px) {
  .menu-checkbox-grid {
    grid-template-columns: 1fr;
  }
}

/* Quotation Page */
#q-content .card table td {
  padding: 6px 0;
}

.q-charge-row input {
  font-size: 0.813rem;
}

.q-charge-remove {
  width: 32px;
  height: 32px;
  padding: 0 !important;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Mobile responsive */
@media (max-width: 768px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .card {
    padding: 16px;
  }

  .modal {
    max-width: 100%;
    margin: 8px;
    border-radius: var(--radius-md);
  }

  .table-container {
    margin: 0 -16px;
  }

  .container {
    padding: 12px;
  }
}

@media (max-width: 480px) {
  .header__nav a,
  .header__nav button {
    padding: 6px 8px;
    font-size: 0.813rem;
  }

  .btn {
    padding: 8px 16px;
    font-size: 0.875rem;
  }
}