:root {
  --bg-main: #0b0f19;
  --bg-surface: #111827;
  --bg-card: #1f2937;
  --bg-card-hover: #283548;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #6366f1;

  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-glow: rgba(79, 70, 229, 0.25);

  --whatsapp-green: #25d366;
  --whatsapp-dark: #128c7e;
  --whatsapp-bg: #0b141a;
  --whatsapp-bubble-bot: #202c33;
  --whatsapp-bubble-user: #005c4b;

  --emerald: #10b981;
  --purple: #8b5cf6;
  --amber: #f59e0b;
  --rose: #f43f5e;
  --blue: #3b82f6;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 12px 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--whatsapp-green));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.brand-text h2 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-meta {
  background-color: rgba(37, 211, 102, 0.15);
  color: var(--whatsapp-green);
  border: 1px solid rgba(37, 211, 102, 0.3);
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
  width: 100%;
}

.nav-item:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  transform: translateX(3px);
}

.nav-item.active {
  background: linear-gradient(90deg, rgba(79, 70, 229, 0.2), rgba(79, 70, 229, 0.05));
  color: #818cf8;
  border-left: 3px solid var(--primary);
  font-weight: 600;
}

.nav-item svg {
  flex-shrink: 0;
}

.sidebar-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.server-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-dot.online {
  background-color: var(--emerald);
  box-shadow: 0 0 8px var(--emerald);
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 32px;
  overflow-y: auto;
  max-height: 100vh;
}

.top-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

.header-title h1 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.header-title p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 2px;
}

/* Tabs */
.tab-pane {
  display: none;
  animation: fadeIn 0.25s ease forwards;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #6366f1);
  color: white;
  box-shadow: 0 2px 8px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover), var(--primary));
  box-shadow: 0 4px 12px var(--primary-glow);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.15);
}

.stat-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.icon-blue { background: rgba(59, 130, 246, 0.15); color: var(--blue); }
.icon-purple { background: rgba(139, 92, 246, 0.15); color: var(--purple); }
.icon-emerald { background: rgba(16, 185, 129, 0.15); color: var(--emerald); }
.icon-amber { background: rgba(245, 158, 11, 0.15); color: var(--amber); }

.stat-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-top: 2px;
}

/* Cards & Tables */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.card-table {
  padding: 0;
  overflow: hidden;
}

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

.card-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.card-header p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.data-table th {
  padding: 14px 20px;
  background-color: rgba(255, 255, 255, 0.02);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

.data-table tbody tr:hover {
  background-color: rgba(255, 255, 255, 0.02);
}

/* Status Badges */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.status-CONFIRMED {
  background-color: rgba(16, 185, 129, 0.15);
  color: var(--emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-COMPLETED {
  background-color: rgba(59, 130, 246, 0.15);
  color: var(--blue);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.status-CANCELLED {
  background-color: rgba(244, 63, 94, 0.15);
  color: var(--rose);
  border: 1px solid rgba(244, 63, 94, 0.3);
}

/* Filter Bar */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Services Grid */
.section-header-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.service-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s ease;
  position: relative;
}

.service-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: var(--shadow-md);
}

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

.service-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.service-duration-badge {
  background-color: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.3);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: var(--radius-full);
}

.service-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
  min-height: 40px;
}

.service-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
}

.service-price {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--emerald);
}

/* Schedules Matrix */
.schedules-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.schedule-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.schedule-day {
  font-weight: 600;
  font-size: 0.95rem;
  width: 120px;
}

.schedule-inputs {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* WhatsApp Simulator */
.simulator-wrapper {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 32px;
  align-items: start;
}

.simulator-info {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.simulator-info h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.simulator-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.alert-box {
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-md);
  padding: 16px;
  font-size: 0.85rem;
}

.alert-box strong {
  color: #a5b4fc;
}

.alert-box ul {
  margin-top: 8px;
  padding-left: 18px;
  color: var(--text-secondary);
}

.alert-box li {
  margin-bottom: 4px;
}

.alert-box code {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  color: white;
}

/* Phone Mockup */
.phone-mockup {
  background-color: var(--whatsapp-bg);
  border: 4px solid #2d3748;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: 0 20px 30px -10px rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
  height: 600px;
}

.phone-header {
  background-color: var(--whatsapp-bubble-bot);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.phone-avatar {
  width: 38px;
  height: 38px;
  background-color: var(--whatsapp-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: white;
  font-size: 0.85rem;
}

.phone-contact {
  display: flex;
  flex-direction: column;
}

.contact-name {
  font-weight: 600;
  font-size: 0.9rem;
}

.contact-status {
  font-size: 0.72rem;
  color: var(--whatsapp-green);
}

.chat-messages {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chat-bubble {
  max-width: 82%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 0.84rem;
  line-height: 1.4;
  word-break: break-word;
  animation: fadeIn 0.2s ease;
}

.bot-bubble {
  background-color: var(--whatsapp-bubble-bot);
  align-self: flex-start;
  border-top-left-radius: 2px;
  color: var(--text-primary);
}

.user-bubble {
  background-color: var(--whatsapp-bubble-user);
  align-self: flex-end;
  border-top-right-radius: 2px;
  color: white;
}

.chat-buttons-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 8px;
}

.chat-btn-option {
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #38bdf8;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  cursor: pointer;
  text-align: center;
  font-family: inherit;
  transition: background 0.15s ease;
}

.chat-btn-option:hover {
  background-color: rgba(255, 255, 255, 0.15);
}

.chat-input-area {
  padding: 12px;
  background-color: var(--whatsapp-bubble-bot);
  display: flex;
  gap: 8px;
}

.chat-input-area input {
  flex: 1;
  background-color: #2a3942;
  border: none;
  border-radius: var(--radius-full);
  padding: 10px 16px;
  color: white;
  font-family: inherit;
  font-size: 0.88rem;
  outline: none;
}

.chat-input-area button {
  background-color: var(--whatsapp-green);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #111;
  cursor: pointer;
  transition: transform 0.15s ease;
}

.chat-input-area button:hover {
  transform: scale(1.05);
}

/* Forms & Modals */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.col-span-2 {
  grid-column: span 2;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input, .form-select, .form-textarea {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-hint {
  font-size: 0.74rem;
  color: var(--text-muted);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  cursor: pointer;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-backdrop.active {
  display: flex;
  animation: fadeIn 0.2s ease;
}

.modal {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 480px;
  padding: 24px;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--bg-card);
  color: var(--text-primary);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  font-size: 0.88rem;
  font-weight: 500;
  display: none;
  z-index: 2000;
  animation: slideUp 0.3s ease;
}

.toast.show {
  display: block;
}

.toast.success {
  border-color: var(--emerald);
  color: var(--emerald);
}

.toast.error {
  border-color: var(--rose);
  color: var(--rose);
}

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

/* Responsive */
@media (max-width: 900px) {
  .app-layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .simulator-wrapper {
    grid-template-columns: 1fr;
  }
  .phone-mockup {
    max-width: 420px;
    margin: 0 auto;
  }
}