:root {
  --bg-app: #0f172a;
  --bg-sidebar: #1e293b;
  --bg-card: #1e293b;
  --bg-card-subtle: #334155;
  --bg-input: #0f172a;
  --border-color: #334155;
  --border-focus: #38bdf8;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --primary: #0ea5e9;
  --primary-hover: #0284c7;
  --primary-subtle: rgba(14, 165, 233, 0.15);
  
  --whatsapp-green: #25d366;
  --whatsapp-dark: #128c7e;
  --whatsapp-bg: #0b141a;
  --whatsapp-bubble-bot: #202c33;
  --whatsapp-bubble-user: #005c4b;
  
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --purple: #a855f7;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

.font-mono {
  font-family: 'JetBrains Mono', monospace;
}

/* ==========================================================================
   Login Screen
   ========================================================================== */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top center, #1e293b 0%, #0f172a 100%);
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
  animation: popIn 0.3s ease;
}

.login-header {
  text-align: center;
  margin-bottom: 28px;
}

.login-header .brand-icon.lg {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  margin: 0 auto 16px;
}

.login-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.login-header p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 4px;
}

.login-footer-hint {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.5;
}

.alert {
  padding: 12px 14px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  margin-bottom: 18px;
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

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

.sidebar {
  width: 270px;
  background-color: var(--bg-sidebar);
  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;
  margin-bottom: 32px;
  padding: 0 8px;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.brand-text h2 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  text-align: left;
}

.nav-item:hover {
  background-color: var(--bg-card-subtle);
  color: var(--text-main);
}

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

/* User Box in Sidebar Footer */
.sidebar-user-box {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #0284c7);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.user-details {
  overflow: hidden;
}

.user-details h4 {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.btn-xs {
  padding: 4px 8px;
  font-size: 0.75rem;
}

/* ==========================================================================
   Main Content & Topbar
   ========================================================================== */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--bg-app);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 32px;
  border-bottom: 1px solid var(--border-color);
}

.page-title h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

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

.tab-content-container {
  padding: 32px;
  flex: 1;
}

.tab-pane {
  display: none;
  animation: fadeIn 0.25s ease;
}

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

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

/* ==========================================================================
   Cards, Tables & Badges
   ========================================================================== */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
}

.card-header h2, .card-header h3 {
  font-size: 1.15rem;
  font-weight: 600;
}

.card-header p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.card-body {
  padding: 24px;
}

.max-w-700 {
  max-width: 700px;
}

.mt-4 {
  margin-top: 20px;
}

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

.action-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.82rem;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.35);
}

.btn-secondary {
  background-color: var(--bg-card-subtle);
  border-color: var(--border-color);
  color: var(--text-main);
}

.btn-secondary:hover {
  background-color: #475569;
}

.btn-outline {
  background: transparent;
  border-color: var(--border-color);
  color: var(--text-main);
}

.btn-outline:hover {
  background-color: var(--bg-card-subtle);
  border-color: var(--text-muted);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.05);
}

.btn-block {
  width: 100%;
}

.text-danger {
  color: var(--danger) !important;
}

.dot-status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success);
  display: inline-block;
}

/* Forms */
.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.88rem;
  color: var(--text-main);
}

.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  font-size: 0.9rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.form-row {
  display: flex;
  gap: 16px;
}

.form-row .col {
  flex: 1;
}

.form-text {
  display: block;
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 6px;
}

.info-box {
  background-color: rgba(14, 165, 233, 0.08);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  font-size: 0.83rem;
  color: #bae6fd;
}

.card-footer-actions {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
}

/* Tables */
.table-responsive {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.table th {
  background-color: rgba(15, 23, 42, 0.5);
  color: var(--text-muted);
  font-weight: 600;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
  vertical-align: middle;
}

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

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.badge-success {
  background-color: rgba(16, 185, 129, 0.15);
  color: var(--success);
}

.badge-primary {
  background-color: var(--primary-subtle);
  color: var(--primary);
}

.badge-in {
  background-color: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
}

.badge-out {
  background-color: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.badge-role-admin {
  background-color: rgba(168, 85, 247, 0.15);
  color: #c084fc;
}

.badge-role-operator {
  background-color: rgba(14, 165, 233, 0.15);
  color: #38bdf8;
}

.badge-role-viewer {
  background-color: rgba(148, 163, 184, 0.15);
  color: #94a3b8;
}

.badge-active {
  background-color: rgba(16, 185, 129, 0.15);
  color: #10b981;
}

.badge-inactive {
  background-color: rgba(239, 68, 68, 0.15);
  color: #ef4444;
}

/* ==========================================================================
   WhatsApp Simulator
   ========================================================================== */
.simulator-wrapper {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 28px;
  align-items: start;
}

.quick-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.phone-mockup {
  background-color: var(--whatsapp-bg);
  border: 1px solid #2a3942;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
  display: flex;
  flex-direction: column;
  height: 640px;
  max-width: 480px;
  overflow: hidden;
  position: relative;
}

.phone-header {
  background-color: #202c33;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid #2a3942;
}

.phone-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--whatsapp-green), var(--whatsapp-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
}

.phone-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: #e9edef;
}

.phone-info p {
  font-size: 0.75rem;
  color: #8696a0;
}

.phone-messages {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background-color: #0b141a;
  background-image: radial-gradient(#182229 1px, transparent 1px);
  background-size: 16px 16px;
}

.msg {
  display: flex;
  flex-direction: column;
  max-width: 82%;
  animation: popIn 0.2s ease;
}

@keyframes popIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.msg-bot {
  align-self: flex-start;
}

.msg-bot .msg-bubble {
  background-color: var(--whatsapp-bubble-bot);
  color: #e9edef;
  border-radius: 0 12px 12px 12px;
}

.msg-user {
  align-self: flex-end;
}

.msg-user .msg-bubble {
  background-color: var(--whatsapp-bubble-user);
  color: #e9edef;
  border-radius: 12px 0 12px 12px;
}

.msg-bubble {
  padding: 10px 14px;
  font-size: 0.88rem;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
  box-shadow: 0 1px 0.5px rgba(11, 20, 26, 0.13);
}

.msg-time {
  font-size: 0.68rem;
  color: #8696a0;
  margin-top: 4px;
  align-self: flex-end;
}

.phone-input-bar {
  background-color: #202c33;
  padding: 10px 12px;
  display: flex;
  gap: 8px;
  align-items: center;
  border-top: 1px solid #2a3942;
}

.phone-input-bar input {
  flex: 1;
  background-color: #2a3942;
  border: none;
  padding: 10px 14px;
  border-radius: var(--radius-full);
  color: #e9edef;
  font-size: 0.9rem;
  outline: none;
  font-family: inherit;
}

.btn-send {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--whatsapp-green);
  border: none;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.btn-send:hover {
  transform: scale(1.05);
  background-color: #20b858;
}

/* ==========================================================================
   Modals
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  padding: 20px;
}

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

.modal-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  box-shadow: var(--shadow-lg);
  transform: translateY(12px);
  transition: transform 0.2s ease;
  overflow: hidden;
}

.modal-overlay.active .modal-box {
  transform: translateY(0);
}

.modal-sm {
  max-width: 440px;
}

.modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 1.15rem;
  font-weight: 600;
}

.btn-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.btn-close:hover {
  color: var(--text-main);
}

.modal-box form {
  padding: 24px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--border-color);
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 2000;
}

.toast {
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 500;
  background-color: #1e293b;
  color: #fff;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  animation: slideInRight 0.3s ease;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast-success {
  border-left: 4px solid var(--success);
}

.toast-error {
  border-left: 4px solid var(--danger);
}

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