:root {
  --primary-color: #c77dff;
  --secondary-color: #ffb3c1;
  --text-color: #333;
  --bg-color: #f5f5f5;
  --message-bg-user: #c77dff;
  --message-bg-bot: #ffb3c1;
  --message-text-user: #fff;
  --message-text-bot: #333;
  --container-bg: rgba(255, 255, 255, 0.85);
  --header-bg: rgba(255, 255, 255, 0.9);
  --border-color: #eee;
  --input-bg: #fff;
  --shadow-color: rgba(0, 0, 0, 0.1);
}

.dark-theme {
  --primary-color: #9d4edd;
  --secondary-color: #ff758f;
  --text-color: #f5f5f5;
  --bg-color: #1a1a1a;
  --message-bg-user: #7b2cbf;
  --message-bg-bot: #e5383b;
  --message-text-user: #fff;
  --message-text-bot: #fff;
  --container-bg: rgba(40, 40, 40, 0.85);
  --header-bg: rgba(40, 40, 40, 0.9);
  --border-color: #444;
  --input-bg: #333;
  --shadow-color: rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color 0.3s, color 0.3s;
}

body {
  margin: 0;
  font-family: 'Nunito', 'Segoe UI', sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  height: 100vh;
  overflow: hidden;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 1rem;
  position: relative;
  z-index: 1;
}

.background-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  overflow: hidden;
}

.floating-shapes .shape {
  animation: float 20s infinite ease-in-out;
}

.floating-shapes .shape:nth-child(2) {
  animation-delay: -2s;
  animation-duration: 23s;
}

.floating-shapes .shape:nth-child(3) {
  animation-delay: -4s;
  animation-duration: 25s;
}

.floating-shapes .shape:nth-child(4) {
  animation-delay: -6s;
  animation-duration: 22s;
}

.floating-shapes .shape:nth-child(5) {
  animation-delay: -8s;
  animation-duration: 24s;
}

.floating-shapes .shape:nth-child(6) {
  animation-delay: -10s;
  animation-duration: 21s;
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0);
  }
  25% {
    transform: translate(30px, 40px);
  }
  50% {
    transform: translate(-20px, 20px);
  }
  75% {
    transform: translate(10px, -30px);
  }
}

.chat-header {
  background: var(--header-bg);
  padding: 1rem;
  border-radius: 20px;
  box-shadow: 0 4px 15px var(--shadow-color);
  margin-bottom: 1rem;
  backdrop-filter: blur(10px);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.chat-header h1 {
  font-size: 1.8rem;
  margin: 0;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.dere-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  position: relative;
}

.dere-controls select {
  padding: 0.5rem;
  border-radius: 10px;
  border: 2px solid var(--primary-color);
  background: var(--input-bg);
  color: var(--text-color);
  font-family: 'Nunito', sans-serif;
  font-weight: 600;
  cursor: pointer;
  outline: none;
}

.tooltip {
  position: relative;
  cursor: pointer;
  color: var(--primary-color);
}

.tooltip-content {
  position: absolute;
  right: 0;
  top: 100%;
  width: 300px;
  background: var(--container-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1rem;
  box-shadow: 0 5px 15px var(--shadow-color);
  z-index: 10;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.tooltip:hover .tooltip-content {
  opacity: 1;
  visibility: visible;
}

.tooltip-content p {
  margin-bottom: 0.5rem;
}

.chat-container {
  flex: 1;
  background: var(--container-bg);
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(10px);
  overflow: hidden;
  box-shadow: 0 4px 15px var(--shadow-color);
  position: relative;
}

.waifu-avatar {
  position: absolute;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 5;
}

.typing-indicator {
  margin-top: 0.5rem;
  display: none;
}

.typing-indicator.active {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.typing-indicator span {
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--primary-color);
  border-radius: 50%;
  animation: typing 1s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-5px);
  }
}

.animate-avatar {
  animation: avatarPulse 0.5s ease-in-out;
}

@keyframes avatarPulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

.chat-messages {
  flex: 1;
  padding: 1rem;
  padding-top: 8rem; 
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar {
  width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
  background: rgba(0,0,0,0.05);
  border-radius: 4px;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 4px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-color);
}

.message {
  max-width: 70%;
  padding: 0.8rem 1.2rem;
  border-radius: 20px;
  animation: messageAppear 0.3s ease-out;
  box-shadow: 0 2px 5px var(--shadow-color);
  position: relative;
}

.user-message {
  background: var(--message-bg-user);
  color: var(--message-text-user);
  align-self: flex-end;
  border-bottom-right-radius: 5px;
}

.bot-message {
  background: var(--message-bg-bot);
  color: var(--message-text-bot);
  align-self: flex-start;
  border-bottom-left-radius: 5px;
}

.welcome-message {
  font-weight: 600;
  background: linear-gradient(to right, var(--message-bg-bot), var(--secondary-color));
  color: var(--message-text-bot);
}

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

.input-container {
  display: flex;
  gap: 0.5rem;
  padding: 1rem;
  border-top: 1px solid var(--border-color);
  background: var(--container-bg);
}

input[type="text"] {
  flex: 1;
  padding: 0.8rem 1.2rem;
  border: 2px solid var(--primary-color);
  border-radius: 20px;
  outline: none;
  font-family: 'Nunito', sans-serif;
  font-size: 1rem;
  background: var(--input-bg);
  color: var(--text-color);
  transition: all 0.3s;
}

input[type="text"]:focus {
  box-shadow: 0 0 0 2px rgba(199, 125, 255, 0.3);
}

button {
  padding: 0.8rem;
  border: none;
  border-radius: 50%;
  width: 45px;
  height: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-color);
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 5px var(--shadow-color);
}

button:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 10px var(--shadow-color);
}

button:active {
  transform: translateY(0);
}

#clearButton {
  background: #ff6b6b;
}

.footer {
  padding: 1rem 0;
  display: flex;
  justify-content: flex-end;
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
}

input:checked + .slider {
  background-color: var(--primary-color);
}

input:checked + .slider:before {
  transform: translateX(26px);
}

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

@media (max-width: 600px) {
  .container {
    padding: 0.5rem;
  }
  
  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .message {
    max-width: 85%;
  }
  
  .waifu-avatar svg {
    width: 100px;
    height: 100px;
  }
  
  .chat-messages {
    padding-top: 7rem;
  }
}