/* --- General Setup & Theme --- */
:root {
  --primary-green: #28a745;
  --dark-green: #155724;
  --light-green-bg: #eaf6ec;
  --bot-bubble-bg: #f0fdf4;
  --background-color: #f8f9fa;
  --card-background: #ffffff;
  --text-color: #212529;
  --border-color: #e9ecef;
  --danger-red: #d62828;
  --danger-red-hover: #b52020;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

body {
  font-family: 'Poppins', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  margin: 0;
  padding: 0; /* Changed for mobile-first */
  display: grid;
  place-items: center;
  min-height: 100vh;
}

/* --- Keyframe Animations --- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Base Mobile Styles --- */
.app-container {
  background: var(--card-background);
  width: 100vw;
  height: 100dvh; /* Dynamic viewport height for mobile */
  border-radius: 0;
  box-shadow: none;
  border: none;
  display: flex;
  flex-direction: column;
  max-height: none;
}

.app-header, .app-footer {
  padding: 1rem 1.25rem;
}

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

.title-section {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo {
  height: 45px;
  width: 45px;
  border-radius: 50%;
  border: 2px solid var(--light-green-bg);
}

.title-section h1 {
  color: var(--dark-green);
  font-weight: 600;
  margin: 0;
  font-size: 1.2rem;
}

.title-section p {
  margin: 0;
  color: #6c757d;
  font-size: 0.85rem;
}

.selectors-wrapper {
  margin-top: 1rem;
}
.select-container {
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  margin-top: 1rem;
}
.select-prompt {
  margin: 0 0 0.75rem 0;
  font-size: 0.9rem;
  color: #495057;
}

.select-wrapper {
  position: relative;
}
.select-wrapper::after {
  content: '\f078';
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  top: 50%;
  right: 1rem;
  transform: translateY(-50%);
  color: var(--primary-green);
  pointer-events: none;
}

.selector-dropdown {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid #ced4da;
  border-radius: 8px;
  background-color: #fff;
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}
.selector-dropdown:focus {
  outline: none;
  border-color: var(--primary-green);
}
.selector-dropdown:disabled {
  background-color: #e9ecef;
  cursor: not-allowed;
}

.chat-window {
  flex-grow: 1;
  padding: 1.25rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.chat-window::-webkit-scrollbar { width: 6px; }
.chat-window::-webkit-scrollbar-track { background: transparent; }
.chat-window::-webkit-scrollbar-thumb { background-color: var(--border-color); border-radius: 20px; }

.message {
  display: flex;
  max-width: 90%;
  align-items: flex-start;
  gap: 0.75rem;
  animation: fadeIn 0.5s ease-in-out;
}

.message-content {
  padding: 0.75rem 1.1rem;
  border-radius: 18px;
  line-height: 1.6;
}

.bot-message { align-self: flex-start; }
.bot-message .message-content { background-color: var(--bot-bubble-bg); border: 1px solid var(--light-green-bg); border-top-left-radius: 5px; }
.bot-message .avatar { font-size: 1.5rem; color: var(--primary-green); margin-top: 5px; }

.user-action-message { align-self: flex-end; font-style: italic; color: #6c757d; }
.user-action-message .message-content { background-color: #e9ecef; border-top-right-radius: 5px; padding: 0.5rem 1rem; }

.chat-buttons { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
.chat-button { padding: 0.5rem 1.1rem; background-color: #fff; color: var(--primary-green); border: 1px solid var(--primary-green); border-radius: 20px; cursor: pointer; font-size: 0.9rem; font-weight: 500; transition: all 0.2s ease; }
.chat-button:hover { background-color: var(--primary-green); color: #fff; transform: translateY(-2px); box-shadow: 0 4px 10px rgba(40, 167, 69, 0.2); }

.product-details-card { border: 1px solid var(--border-color); border-radius: 12px; padding: 1rem; background: #fff; margin-top: 0.25rem; }
.product-details-card h3 { margin: 0 0 1rem 0; color: var(--dark-green); border-bottom: 2px solid var(--light-green-bg); padding-bottom: 0.75rem; }
.product-details-card p { margin: 0 0 0.75rem 0; font-size: 0.95rem; }
.product-details-card p:last-child { margin-bottom: 0; }
.product-details-card p strong { color: #343a40; }

.ai-response-content ul { list-style-type: none; padding-left: 0; margin-top: 0.75rem; }
.ai-response-content li { background: rgba(255,255,255,0.8); padding: 0.75rem 1rem; margin-bottom: 0.5rem; border-radius: 8px; border-left: 4px solid var(--primary-green); font-size: 0.95rem; }

.product-image-container { padding: 0.25rem; background: #fff; border: 1px solid var(--border-color); border-radius: 12px; overflow: hidden; max-width: 250px; }
.product-image-container img { display: block; width: 100%; border-radius: 8px; }
.message-content.image-only-content { padding: 0; background: transparent; border: none; }

.app-footer {
  background: #f8f9fa;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.contact-bar {
  display: flex;
  flex-direction: column; /* Stacks vertically on mobile */
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: #495057;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}
.contact-bar span { display: flex; align-items: center; }
.contact-bar i { margin-right: 0.5rem; color: var(--primary-green); }
.app-footer #endChatBtn { background: var(--danger-red); color: #fff; border: none; padding: 0.6rem 1.5rem; border-radius: 8px; font-size: 1rem; font-weight: 500; font-family: 'Poppins', sans-serif; cursor: pointer; transition: all 0.2s ease; align-self: center; width: fit-content; }
.app-footer #endChatBtn:hover { background: var(--danger-red-hover); transform: translateY(-2px); }
.app-footer #endChatBtn:disabled { background: #e9ecef; color: #ced4da; cursor: not-allowed; transform: none; }

/* --- Tablet Styles (768px and up) --- */
@media (min-width: 768px) {
  body {
    padding: 20px;
  }
  .app-container {
    width: 100%;
    max-width: 800px;
    height: 90vh;
    max-height: 850px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
  }
  .app-header, .app-footer {
    padding: 20px 30px;
  }
  .title-section h1 {
    font-size: 1.4rem;
  }
  .contact-bar {
    flex-direction: row; /* Side-by-side on tablets */
    justify-content: space-around;
    font-size: 0.9rem;
  }
}

/* --- Laptop & Desktop Styles (992px and up) --- */
@media (min-width: 992px) {
  .app-container {
    max-width: 850px; /* Slightly larger for desktops */
  }
}