:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.08);
  --secondary: #0ea5e9;
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.1);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.1);
  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.08);
  --info: #3b82f6;
  --info-light: rgba(59, 130, 246, 0.1);
  
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-elevated: #ffffff;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;
  
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body { 
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 
  background: var(--bg-primary);
  color: var(--text-primary); 
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

header { 
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0.875rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  animation: slideDown 0.5s ease-out;
}

@keyframes slideDown {
  from { transform: translateY(-100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

nav { 
  display: flex; 
  gap: 0.5rem; 
  align-items: center;
}

nav a { 
  text-decoration: none; 
  color: var(--text-secondary); 
  font-weight: 500; 
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  font-size: 0.9375rem;
  white-space: nowrap;
}

nav a:hover { 
  color: var(--text-primary);
  background: var(--bg-subtle);
}

nav a.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}

main { 
  max-width: 100%;
  margin: 0 auto;
  padding: 1.5rem 2rem;
  animation: fadeIn 0.6s ease-out;
  width: 100%;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

h1 { 
  color: var(--text-primary);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
  letter-spacing: -0.025em;
}

h2 { 
  color: var(--text-primary);
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: 600;
  margin: 2rem 0 1rem;
  letter-spacing: -0.015em;
}

h3 {
  color: var(--text-secondary);
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  font-weight: 600;
  margin: 1.5rem 0 1rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

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

.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

th { 
  background: var(--bg-subtle);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 0.875rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

td { 
  padding: 1rem;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  vertical-align: middle;
}

tr {
  transition: background var(--transition-fast);
}

tr:hover { 
  background: var(--bg-subtle);
}

tr:last-child td {
  border-bottom: none;
}

tr {
  animation: rowSlideIn 0.3s ease-out backwards;
}

tr:nth-child(1) { animation-delay: 0.03s; }
tr:nth-child(2) { animation-delay: 0.06s; }
tr:nth-child(3) { animation-delay: 0.09s; }
tr:nth-child(4) { animation-delay: 0.12s; }
tr:nth-child(5) { animation-delay: 0.15s; }
tr:nth-child(6) { animation-delay: 0.18s; }
tr:nth-child(7) { animation-delay: 0.21s; }
tr:nth-child(8) { animation-delay: 0.24s; }
tr:nth-child(9) { animation-delay: 0.27s; }
tr:nth-child(10) { animation-delay: 0.3s; }

@keyframes rowSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

button, .btn { 
  padding: 0.625rem 1.25rem; 
  background: var(--primary);
  color: var(--text-inverse); 
  border: none; 
  border-radius: var(--radius-sm); 
  cursor: pointer;
  font-weight: 500;
  font-size: 0.875rem;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

button:hover, .btn:hover { 
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

button:active, .btn:active {
  transform: translateY(0);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--bg-subtle);
  border-color: var(--text-muted);
  box-shadow: var(--shadow-md);
}

.btn-success {
  background: var(--success);
}

.btn-success:hover {
  background: #059669;
}

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

.btn-danger:hover {
  background: #dc2626;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.status-diamond {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.1em;
  height: 1.1em;
  border-radius: 50%;
  margin-left: 0.25em;
  font-size: 0.9em;
}
.status-bronze { color: #cd7f32; }
.status-silver { color: #c0c0c0; }
.status-gold { color: #d4af37; }
.status-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.status-new {
  background: var(--info-light);
  color: var(--info);
}
.status-new::before { background: var(--info); }

.status-in-progress {
  background: var(--warning-light);
  color: #b45309;
}
.status-in-progress::before { background: var(--warning); }

.status-confirmed {
  background: var(--success-light);
  color: #047857;
}
.status-confirmed::before { background: var(--success); }

.status-checkin {
  background: rgba(139, 92, 246, 0.1);
  color: #7c3aed;
}
.status-checkin::before { background: #8b5cf6; }

.status-completed {
  background: var(--bg-subtle);
  color: var(--text-muted);
}
.status-completed::before { background: var(--text-muted); }

.status-cancelled {
  background: var(--danger-light);
  color: var(--danger);
}
.status-cancelled::before { background: var(--danger); }

form { 
  display: flex; 
  flex-direction: column; 
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

input, select, textarea { 
  padding: 0.625rem 0.875rem; 
  background: var(--bg-secondary);
  border: 1px solid var(--border); 
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9375rem;
  transition: all var(--transition-base);
  font-family: inherit;
  width: 100%;
}

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

input::placeholder, textarea::placeholder {
  color: var(--text-muted);
}

label { 
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.modal { 
  position: fixed; 
  top: 0; 
  left: 0; 
  width: 100%; 
  height: 100%; 
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(4px);
  display: flex; 
  justify-content: center; 
  align-items: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  padding: 1rem;
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content { 
  background: var(--bg-elevated);
  padding: 2rem; 
  border-radius: var(--radius-xl);
  width: 100%; 
  max-width: 560px; 
  max-height: 85vh; 
  overflow-y: auto;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xl);
  transform: scale(0.95) translateY(10px);
  transition: all var(--transition-slow);
}

.modal.active .modal-content {
  transform: scale(1) translateY(0);
}

.toast-container {
  position: fixed;
  top: 5rem;
  right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.875rem 1.25rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 280px;
  max-width: 400px;
  animation: toastSlideIn 0.3s ease-out;
  pointer-events: auto;
  font-size: 0.875rem;
}

.toast.toast-exit {
  animation: toastSlideOut 0.25s ease-in forwards;
}

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

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

.toast-success { border-left: 3px solid var(--success); }
.toast-error { border-left: 3px solid var(--danger); }
.toast-warning { border-left: 3px solid var(--warning); }
.toast-info { border-left: 3px solid var(--info); }

.loading-spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.filter-bar {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.filter-bar input, .filter-bar select {
  flex: 1;
  min-width: 180px;
}

.search-input-wrapper {
  position: relative;
  flex: 2;
  min-width: 240px;
}

.search-input-wrapper::before {
  content: '';
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
}

.search-input-wrapper input {
  padding-left: 2.5rem;
}

.action-buttons {
  display: flex;
  gap: 0.375rem;
  flex-wrap: nowrap;
}

.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.4;
}

.empty-state h3 {
  color: var(--text-secondary);
  margin: 0 0 0.5rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  text-align: center;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

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

.stat-value {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.8125rem;
  margin-top: 0.25rem;
  font-weight: 500;
}

.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  max-width: 480px;
}

hr { 
  margin: 2rem 0; 
  border: none; 
  border-top: 1px solid var(--border);
}

/* ========================================
   BOOKING CARDS (mobile/tablet view)
   ======================================== */
.booking-cards {
  display: none;
}

.booking-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 0.75rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  animation: cardSlideIn 0.3s ease-out backwards;
}

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

.booking-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}

.booking-card-name {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
}

.booking-card-id {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.booking-card-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.booking-card-field {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.booking-card-label {
  font-size: 0.6875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.booking-card-value {
  font-size: 0.875rem;
  color: var(--text-primary);
  font-weight: 500;
}

.booking-card-footer {
  display: flex;
  justify-content: flex-end;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-light);
}

@keyframes cardSlideIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ========================================
   RESPONSIVE — TABLET (≤1024px)
   ======================================== */
@media (max-width: 1024px) {
  header {
    padding: 0.75rem 1.5rem;
  }
  
  main {
    padding: 1.25rem 1.5rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .filter-bar {
    padding: 0.875rem;
  }
}

/* ========================================
   RESPONSIVE — PHONE (≤768px)
   ======================================== */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
  
  header {
    padding: 0.625rem 1rem;
  }
  
  nav {
    gap: 0.25rem;
  }
  
  nav a {
    padding: 0.4rem 0.625rem;
    font-size: 0.8125rem;
  }
  
  main {
    padding: 1rem;
  }
  
  h1 {
    margin-bottom: 1rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
  
  .stat-card {
    padding: 1rem;
  }
  
  .stat-value {
    font-size: 1.5rem;
  }
  
  .filter-bar {
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.875rem;
  }
  
  .filter-bar input,
  .filter-bar select {
    min-width: 100%;
    width: 100%;
  }
  
  .search-input-wrapper {
    min-width: 100%;
  }
  
  /* Hide tables, show cards */
  .table-container {
    display: none !important;
  }
  
  .booking-cards {
    display: block;
  }
  
  .toast-container {
    top: 4.5rem;
    right: 0.75rem;
    left: 0.75rem;
  }
  
  .toast {
    min-width: auto;
    max-width: none;
    width: 100%;
  }
  
  .modal-content {
    padding: 1.5rem;
    max-width: 100%;
    margin: 0.5rem;
  }
  
  .action-buttons {
    flex-direction: row;
  }
  
  .action-buttons button {
    flex: 1;
  }
  
  .form-card {
    max-width: 100%;
  }
  
  form {
    max-width: 100%;
  }
}

/* ========================================
   RESPONSIVE — SMALL PHONE (≤480px)
   ======================================== */
@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  header {
    padding: 0.5rem 0.75rem;
  }
  
  nav {
    gap: 0.125rem;
  }
  
  nav a {
    padding: 0.375rem 0.5rem;
    font-size: 0.75rem;
  }
  
  main {
    padding: 0.75rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }
  
  .stat-card {
    padding: 0.875rem 0.5rem;
  }
  
  .stat-label {
    font-size: 0.6875rem;
  }
  
  .booking-card {
    padding: 1rem;
  }
  
  .booking-card-body {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  
  .card {
    padding: 1rem;
  }
  
  .modal-content {
    padding: 1.25rem;
  }
}

/* ========================================
   RESPONSIVE — LARGE SCREENS (≥1440px)
   ======================================== */
@media (min-width: 1440px) {
  html {
    font-size: 17px;
  }
  
  main {
    max-width: 1440px;
    padding: 2rem 3rem;
  }
  
  header {
    padding: 1rem 3rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
  }
  
  .stat-card {
    padding: 1.5rem;
  }
  
  .filter-bar {
    padding: 1.25rem;
  }
}

/* ========================================
   RESPONSIVE — XL / TV (≥1920px)
   ======================================== */
@media (min-width: 1920px) {
  html {
    font-size: 18px;
  }
  
  main {
    max-width: 1680px;
    padding: 2.5rem 4rem;
  }
  
  header {
    padding: 1.25rem 4rem;
  }
  
  nav a {
    font-size: 1rem;
    padding: 0.625rem 1.25rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
  
  .stat-card {
    padding: 2rem;
  }
  
  .stat-value {
    font-size: 2.5rem;
  }
  
  .stat-label {
    font-size: 0.9375rem;
  }
  
  .table-container {
    border-radius: var(--radius-xl);
  }
  
  th {
    padding: 1rem 1.25rem;
    font-size: 0.75rem;
  }
  
  td {
    padding: 1.125rem 1.25rem;
  }
  
  .filter-bar {
    padding: 1.5rem;
    gap: 1rem;
    border-radius: var(--radius-xl);
  }
  
  .filter-bar input,
  .filter-bar select {
    padding: 0.875rem 1rem;
    font-size: 1rem;
  }
  
  button, .btn {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
  }
  
  .card {
    padding: 2rem;
    border-radius: var(--radius-xl);
  }
  
  .form-card {
    max-width: 560px;
    padding: 2rem;
  }
  
  .modal-content {
    max-width: 640px;
    padding: 2.5rem;
  }
  
  .booking-card {
    padding: 1.5rem;
    margin-bottom: 1rem;
  }
}

/* ========================================
   RESPONSIVE — 4K / HUGE TV (≥2560px)
   ======================================== */
@media (min-width: 2560px) {
  html {
    font-size: 20px;
  }
  
  main {
    max-width: 2000px;
    padding: 3rem 5rem;
  }
  
  header {
    padding: 1.5rem 5rem;
  }
  
  .stats-grid {
    gap: 2rem;
  }
  
  .stat-card {
    padding: 2.5rem;
  }
  
  .stat-value {
    font-size: 3rem;
  }
  
  .stat-label {
    font-size: 1.125rem;
  }
  
  nav a {
    font-size: 1.125rem;
    padding: 0.75rem 1.5rem;
  }
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
  header, .filter-bar, .action-buttons, .toast-container, button, .btn {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .card, .table-container {
    box-shadow: none;
    border: 1px solid #ccc;
  }
  
  main {
    padding: 0;
    max-width: 100%;
  }
}
/* Diamond/bronze/silver/gold status colors for client profiles */
.status-diamond { color: #4b8af5; background: rgba(75, 142, 245, 0.15); padding: 0.15rem 0.5rem; border-radius: 6px; }
.status-bronze { color: #cd7f32; background: rgba(205, 127, 50, 0.15); padding: 0.15rem 0.5rem; border-radius: 6px; }
.status-silver { color: #c0c0c0; background: rgba(192, 192, 192, 0.25); padding: 0.15rem 0.5rem; border-radius: 6px; }
.status-gold { color: #d4af37; background: rgba(212, 175, 55, 0.25); padding: 0.15rem 0.5rem; border-radius: 6px; }
.status-bronze::before, .status-silver::before, .status-gold::before, .status-diamond::before { content:''; display:inline-block; width:6px; height:6px; margin-right:4px; border-radius:50%; vertical-align: middle; }
.status-diamond::before { background:#4b8af5; }
.status-bronze::before { background:#cd7f32; }
.status-silver::before { background:#c0c0c0; }
.status-gold::before { background:#d4af37; }