:root {
  --vps-accent: #c1954e;
  --vps-bg: #ffffff;
  --vps-text: #222;
  --vps-border: #ddd;
}

/* Open Chat Button */
.vps-open-chat {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 99998;
  background: var(--vps-accent);
  color: #fff;
  border: none;
  padding: 12px 20px;
  border-radius: 25px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: all 0.3s ease;
}

.vps-open-chat:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

/* Modal Overlay */
.vps-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
}

/* Hidden state */
.vps-hidden { 
  display: none !important; 
}

/* Modal Panel */
.vps-modal-panel {
  width: 420px;
  max-width: 95%;
  max-height: 90vh;
  background: var(--vps-bg);
  color: var(--vps-text);
  border-radius: 12px;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.3s ease;
}

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

/* Header */
.vps-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  background: var(--vps-accent);
  color: #fff;
}

.vps-brand { 
  display: flex; 
  align-items: center; 
  gap: 10px; 
}

.vps-logo { 
  max-height: 36px; 
  display: block; 
}

.vps-title { 
  margin: 0; 
  font-size: 1.1rem; 
  font-weight: 600;
  color: #fff; 
}

.vps-close {
  background: transparent;
  border: 0;
  color: #fff;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: background 0.2s;
}

.vps-close:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Body */
.vps-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
  min-height: 0;
}

/* Messages Container */
.vps-messages { 
  overflow-y: auto;
  flex: 1;
  padding-right: 8px;
  min-height: 300px;
  max-height: 400px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Scrollbar styling */
.vps-messages::-webkit-scrollbar {
  width: 6px;
}

.vps-messages::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 3px;
}

.vps-messages::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 3px;
}

.vps-messages::-webkit-scrollbar-thumb:hover {
  background: #aaa;
}

/* Individual Messages */
.vps-message { 
  padding: 10px 14px;
  border-radius: 12px;
  max-width: 85%;
  word-wrap: break-word;
  line-height: 1.5;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.vps-user { 
  background: #e3f2fd;
  align-self: flex-end;
  margin-left: auto;
  border-bottom-right-radius: 4px;
}

.vps-bot { 
  background: #f5f5f5;
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

/* Loading Indicator */
.vps-loading { 
  font-style: italic;
  color: #666;
  margin: 6px 0;
  padding-left: 14px;
}

/* Form */
.vps-form { 
  display: flex;
  gap: 8px;
  margin-top: 4px;
  border-top: 1px solid var(--vps-border);
  padding-top: 12px;
}

.vps-form input { 
  flex: 1;
  padding: 10px 12px;
  border: 1px solid var(--vps-border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.vps-form input:focus {
  border-color: var(--vps-accent);
}

.vps-send { 
  background: var(--vps-accent);
  color: #fff;
  border: 0;
  padding: 10px 18px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s;
}

.vps-send:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.vps-send:active {
  transform: translateY(0);
}

/* Quick Add to Cart Button */
.vps-quick-add { 
  margin-top: 8px;
  background: #2d6a2d;
  color: #fff;
  border: 0;
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
}

.vps-quick-add:hover {
  background: #236323;
}

.vps-quick-add:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Mobile Responsive */
@media (max-width: 480px) {
  .vps-modal-panel {
    width: 100%;
    max-width: 100%;
    height: 100vh;
    max-height: 100vh;
    border-radius: 0;
  }
  
  .vps-messages {
    max-height: calc(100vh - 200px);
  }
  
  .vps-open-chat {
    right: 15px;
    bottom: 15px;
    padding: 10px 16px;
    font-size: 14px;
  }
}