:root {
  --bg: #f2f2f2;
  --chat-bg: #fff;
  --text: #222;
  --msg-bg: #fbe6ff;
  --input-bg: #fff;
  --border: #ccc;
  --button-bg: #1890ff;
  --button-hover: #1677cc;
  --emoji-hover: #e6f7ff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #181a20;
    --chat-bg: #23262f;
    --text: #f5f6fa;
    --msg-bg: #253046;
    --input-bg: #23262f;
    --border: #33384d;
    --button-bg: #3a7cff;
    --button-hover: #2553b8;
    --emoji-hover: #253046;
  }
}

/* Manual theme override */
body.dark, #chatBox.dark {
  --bg: #181a20;
  --chat-bg: #23262f;
  --text: #f5f6fa;
  --msg-bg: #253046;
  --input-bg: #23262f;
  --border: #33384d;
  --button-bg: #3a7cff;
  --button-hover: #2553b8;
  --emoji-hover: #253046;
}
body.light, #chatBox.light {
  --bg: #f2f2f2;
  --chat-bg: #fff;
  --text: #222;
  --msg-bg: #e6f7ff;
  --input-bg: #fff;
  --border: #ccc;
  --button-bg: #1890ff;
  --button-hover: #1677cc;
  --emoji-hover: #e6f7ff;
}

/* ANIMATED BLENDED BACKGROUND */
body {
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #a259ff 0%, #ffd700 100%);
  color: var(--text);
  padding: 1.25rem;
  margin: 0;
  transition: background 0.3s, color 0.3s;
  position: relative;
  overflow-x: hidden;
}

/* Animated, blurred, layered blobs! */
body::before {
  content: "";
  position: fixed;
  z-index: -1;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 60% 5%, #b97fffbb 0 22%, transparent 65%),
    radial-gradient(circle at 20% 80%, #ffdf70bb 0 25%, transparent 70%),
    radial-gradient(circle at 90% 90%, #ff99facc 0 21%, transparent 60%);
  opacity: 0.8;
  filter: blur(46px);
  animation: bgblobs 15s ease-in-out infinite alternate;
}
body.dark::before, #chatBox.dark::before {
  background:
    radial-gradient(circle at 60% 5%, #7547a799 0 22%, transparent 70%),
    radial-gradient(circle at 20% 80%, #ffd70099 0 25%, transparent 70%),
    radial-gradient(circle at 90% 90%, #a259ffaa 0 18%, transparent 70%);
  opacity: 0.65;
}
@keyframes bgblobs {
  0% {
    background-position: 60% 5%, 20% 80%, 90% 90%;
  }
  100% {
    background-position: 50% 40%, 80% 90%, 10% 80%;
  }
}

/* BG Combo Gradients - will be toggled by JS */
body.bg-combo-0 { background: linear-gradient(135deg, #1A1A1D 0%, #C3073F 100%); }
body.bg-combo-1 { background: linear-gradient(120deg, #2E8B57 0%, #F0F8FF 100%); }
body.bg-combo-2 { background: linear-gradient(110deg, #0F4C81 0%, #F9A03F 100%); }
body.bg-combo-3 { background: linear-gradient(100deg, #222831 0%, #EEEEEE 100%); }
body.bg-combo-4 { background: linear-gradient(120deg, #FF6F61 0%, #6B5B95 100%); }

body {
  transition: background 0.6s cubic-bezier(.4,2,.3,1), color 0.3s;
}

/* Chat Box and UI */

#chatBox {
  width: 90%;
  max-width: 500px;
  margin: 0 auto;
  background: var(--chat-bg);
  color: var(--text);
  padding: 1.25rem;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  position: relative;
  transition: background 0.3s, color 0.3s;
}
#themeToggle {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  font-size: 1.5em;
  cursor: pointer;
  color: var(--text);
  transition: color 0.3s;
}
#messages {
  height: 300px;
  overflow-y: auto;
  border: 1px solid var(--border);
  padding: 0.625rem;
  margin-bottom: 0.5rem;
  background: var(--input-bg);
  transition: background 0.3s, border 0.3s;
}
.msg {
  margin: 0.3125rem 0;
  padding: 0.3125rem 0.625rem;
  border-radius: 5px;
  background: var(--msg-bg);
  position: relative;
  word-break: break-word;
  transition: background 0.3s;
}
.name {
  font-weight: bold;
  margin-right: 0.3125rem;
}
.timestamp {
  display: block;
  font-size: 0.75em;
  color: #666;
  margin-top: 0.125rem;
}
.deleteBtn {
  position: absolute;
  right: 0.3125rem;
  top: 0.3125rem;
  background: transparent;
  border: none;
  color: red;
  cursor: pointer;
  font-size: 0.8em;
}
#name, #message, #sendBtn {
  width: 100%;
  box-sizing: border-box;
  display: block;
}
#name {
  padding: 0.5rem 0.5rem;
  margin-bottom: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--input-bg);
  color: var(--text);
  font-size: 1rem;
  transition: background 0.3s, color 0.3s, border 0.3s;
}
textarea#message {
  padding: 0.5rem 0.5rem;
  resize: vertical;
  min-height: 40px;
  max-height: 120px;
  margin-bottom: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: inherit;
  font-size: 1rem;
  background: var(--input-bg);
  color: var(--text);
  transition: background 0.3s, color 0.3s, border 0.3s;
}
#sendBtn {
  padding: 0.625rem;
  margin-top: 0;
  border: none;
  border-radius: 4px;
  background: var(--button-bg);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.3s;
}
#sendBtn:hover {
  background: var(--button-hover);
}

/* Emoji picker styles */
#emojiPicker {
  margin-bottom: 0.5rem;
  text-align: left;
  user-select: none;
}
.emojiBtn {
  font-size: 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  margin: 0.125rem;
  transition: transform 0.1s, background 0.3s;
  border-radius: 4px;
  color: var(--text);
}
.emojiBtn:hover {
  background: var(--emoji-hover);
  transform: scale(1.2);
}

/* Responsive adjustments */
@media (max-width: 600px) {
  body {
    padding: 1rem;
  }
  #chatBox {
    width: 100%;
    padding: 1rem;
    border-radius: 0;
    box-shadow: none;
  }
  #messages {
    height: 250px;
  }
  #sendBtn {
    font-size: 1.1rem;
    padding: 0.75rem;
  }
  #name, textarea#message {
    font-size: 1.1rem;
  }
  .emojiBtn {
    font-size: 1.75rem;
    margin: 0.25rem;
  }
}