body {
  font-family: "Vazirmatn", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: #f5f6f8;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  color: #2b2f33;
}

#chat-container {
  width: 92%;
  max-width: 680px;
  height: 92vh;
  max-height: 860px;
  background-color: #ffffff;
  border-radius: 16px;
  box-shadow: 0 8px 28px rgba(0,0,0,0.08);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#chat-header {
  background-color: #00695C;
  color: white;
  padding: 16px 20px;
  text-align: center;
  font-weight: 600;
  font-size: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
  display: flex;
  justify-content: space-between;
  align-items: center;
  letter-spacing: 0.2px;
}

#tasks-toggle {
  background: #ffffff;
  color: #00695C;
  border: 1px solid #0a7a6d;
  border-radius: 18px;
  padding: 6px 12px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
}
#tasks-toggle:hover {
  background: #e7f3f1;
  border-color: #0a7a6d;
}

#tasks-view { 
  padding: 16px 20px; 
  overflow-y: auto; 
  flex-grow: 1; 
  background: #fafbfc;
}
#tasks-list { list-style: none; margin: 0; padding: 0; }
#tasks-list li { 
  display: flex; 
  align-items: center; 
  gap: 10px; 
  padding: 12px 0; 
  border-bottom: 1px solid #eee; 
  font-size: 15px; 
}
#tasks-list input[type="checkbox"] {
  accent-color: #00796B;
}

#chat-messages {
  flex-grow: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Messages */
.message {
  padding: 12px 16px;
  border-radius: 16px;
  margin-bottom: 4px;
  max-width: 85%;
  line-height: 1.7;
  font-size: 15px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.04);
}

.message.user {
  background-color: #e8f5f3;
  color: #0f3f38;
  align-self: flex-start;
  border-bottom-right-radius: 6px;
  border: 1px solid #d5ebe8;
}

.message.model {
  background-color: #f4f6f8;
  color: #33383c;
  align-self: flex-end;
  border-bottom-left-radius: 6px;
  border: 1px solid #e7eaee;
  white-space: pre-wrap;
}

.message.model.loading {
  background-color: #f4f6f8;
  color: #8b8f93;
  align-self: flex-end;
  border-bottom-left-radius: 6px;
  border: 1px solid #e7eaee;
  animation: pulse 1.5s infinite;
}

/* Input Area */
#input-area {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 1px solid #e6e8ea;
  padding: 12px;
  background: #ffffff;
  align-items: stretch;
}

/* Suggestions Bar */
#suggestions-bar {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  white-space: nowrap;
  padding: 6px 0;
  width: 100%;
  -webkit-overflow-scrolling: touch;
}
#suggestions-bar::-webkit-scrollbar {
  height: 6px;
}
#suggestions-bar::-webkit-scrollbar-thumb {
  background-color: #cbd3da;
  border-radius: 8px;
}
.suggestion-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 18px;
  border: 1px solid #d8dde2;
  background: #f7f9fb;
  color: #2b2f33;
  font-size: 13px;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.2s ease, border-color 0.2s ease;
  font-weight: 500;
  letter-spacing: 0.1px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
.suggestion-chip:hover {
  background: #eef3f6;
  border-color: #c8d0d7;
}

#input-row {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}

#user-input {
  flex: 1 1 auto;
  border: 1px solid #d8dde2;
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 15px;
  resize: none;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  margin-left: 0; /* reset from previous horizontal layout */
}

#send-button {
  background-color: #00796B;
  color: white;
  border: none;
  border-radius: 14px;
  width: 48px;
  height: 44px;
  font-size: 20px;
  cursor: pointer;
  transition: background-color 0.25s ease, transform 0.08s ease;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
}

/* Scrollbar styling for better feel */
#chat-messages::-webkit-scrollbar,
#tasks-view::-webkit-scrollbar {
  width: 8px;
}
#chat-messages::-webkit-scrollbar-track,
#tasks-view::-webkit-scrollbar-track {
  background: transparent;
}
#chat-messages::-webkit-scrollbar-thumb,
#tasks-view::-webkit-scrollbar-thumb {
  background-color: #cbd3da;
  border-radius: 8px;
}
#chat-messages::-webkit-scrollbar-thumb:hover,
#tasks-view::-webkit-scrollbar-thumb:hover {
  background-color: #b7c1ca;
}

/* Animations */
@keyframes pulse {
  0% { opacity: 0.7; }
  50% { opacity: 1; }
  100% { opacity: 0.7; }
}

@keyframes blink {
  0% { border-color: transparent; }
  50% { border-color: #8b8f93; }
  100% { border-color: transparent; }
}

/* Small screens */
@media (max-width: 420px) {
  #chat-container {
    width: 96%;
    height: 94vh;
  }
  #chat-header {
    font-size: 15px;
    padding: 14px 16px;
  }
  .message { font-size: 14px; }
  #user-input { font-size: 14px; }
  #suggestions-bar { width: 100%; }
}