/* ========================================
   SKY WhatsApp Integration - Styles
   Modern, Premium UI Design
   ======================================== */

:root {
  /* Colors - Dark Theme with WhatsApp Accent */
  --bg-primary: #0a0f1a;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-card: #1a2332;
  --bg-hover: #243447;
  
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --accent-primary: #25D366;
  --accent-secondary: #128C7E;
  --accent-gradient: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
  
  --border-color: #374151;
  --border-light: rgba(255, 255, 255, 0.1);
  
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(37, 211, 102, 0.3);
  
  /* Sizing */
  --sidebar-width: 280px;
  --header-height: 80px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

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

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 100;
}

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

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

.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
}

.logo-icon svg {
  width: 24px;
  height: 24px;
  color: white;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
  font-weight: 500;
}

.nav-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

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

.nav-item.active {
  background: var(--accent-gradient);
  color: white;
  box-shadow: var(--shadow-glow);
}

.sidebar-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--error);
}

.status-indicator.online {
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  background: var(--bg-primary);
}

.content-header {
  height: var(--header-height);
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-left h1 {
  font-size: 24px;
  font-weight: 700;
}

.header-left .subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 2px;
}

.header-right {
  display: flex;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

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

.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* Messages Container */
.messages-container {
  padding: 24px 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Message Card */
.message-card {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

.message-card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md);
}

.message-card.outbound {
  background: linear-gradient(135deg, rgba(37, 211, 102, 0.1) 0%, rgba(18, 140, 126, 0.1) 100%);
  border-color: rgba(37, 211, 102, 0.3);
}

.message-avatar {
  width: 48px;
  height: 48px;
  background: var(--bg-tertiary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.message-content {
  flex: 1;
  min-width: 0;
}

.message-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.message-from {
  font-weight: 600;
  color: var(--accent-primary);
}

.message-arrow {
  color: var(--text-muted);
}

.message-to {
  font-weight: 500;
  color: var(--text-secondary);
}

.message-time {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-muted);
}

.message-body {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
  word-wrap: break-word;
}

.message-footer {
  margin-top: 12px;
}

.message-status {
  font-size: 12px;
  color: var(--text-muted);
}

.message-status.sent {
  color: var(--info);
}

.message-status.delivered {
  color: var(--success);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 80px 40px;
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 2px dashed var(--border-color);
}

.empty-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: var(--bg-tertiary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.empty-icon svg {
  width: 40px;
  height: 40px;
  color: var(--text-muted);
}

.empty-state h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.empty-state p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

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

.modal {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 480px;
  margin: 20px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  transform: scale(0.9) translateY(20px);
  transition: all 0.3s ease;
}

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

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

.modal-header h2 {
  font-size: 20px;
}

.modal-close {
  width: 36px;
  height: 36px;
  border: none;
  background: var(--bg-tertiary);
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 24px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: var(--error);
  color: white;
}

/* Forms */
form {
  padding: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 15px;
  font-family: inherit;
  transition: all 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.2);
}

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

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  padding-top: 8px;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 16px 24px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  font-weight: 500;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 2000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.success {
  border-color: var(--success);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, var(--bg-secondary) 100%);
}

.toast.error {
  border-color: var(--error);
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.2) 0%, var(--bg-secondary) 100%);
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .content-header {
    padding: 0 16px;
  }
  
  .messages-container {
    padding: 16px;
  }
  
  .message-card {
    padding: 16px;
  }
  
  .header-left h1 {
    font-size: 18px;
  }
  
  .btn {
    padding: 10px 16px;
  }
  
  .btn span:not(.btn-text):not(.btn-loader) {
    display: none;
  }
}