* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Light/Dark Mode Color Variables */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-header-footer: #ffffff;
  --text-primary: #000000;
  --text-secondary: #666666;
  --border-color: #e0e0e0;
  --user-bubble-bg: linear-gradient(135deg, #3399ff 0%, #1a7acc 100%);
  --user-bubble-shadow: rgba(51, 153, 255, 0.15);
  --assistant-bubble-bg: linear-gradient(135deg, #e8e8e8 0%, #d8d8d8 100%);
  --assistant-bubble-shadow: rgba(0, 0, 0, 0.05);
  --assistant-bubble-base: #e0e0e0;
  --input-bg: #f5f5f5;
  --input-border: #d0d0d0;
  --input-focus-border: #3399ff;
  --typing-dot: #999999;
  --live-tag-bg: rgba(0, 0, 0, 0.08);
  --live-tag-hover-bg: rgba(0, 0, 0, 0.12);
  --live-tag-text: #000000;
  --link-color: #0066cc;
  --link-hover: #0052a3;
  --scrollbar-thumb: rgba(0, 0, 0, 0.2);
  --scrollbar-thumb-hover: rgba(0, 0, 0, 0.3);
}

/* Dark mode - auto-detect */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-primary: #1a1a1a;
    --bg-secondary: #0f0f0f;
    --bg-header-footer: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #aaaaaa;
    --border-color: #333333;
    --user-bubble-bg: linear-gradient(135deg, #3399ff 0%, #1a7acc 100%);
    --user-bubble-shadow: rgba(51, 153, 255, 0.15);
    --assistant-bubble-bg: linear-gradient(135deg, #3a3a3a 0%, #2f2f2f 100%);
    --assistant-bubble-shadow: rgba(0, 0, 0, 0.2);
    --assistant-bubble-base: #353535;
    --input-bg: #2a2a2a;
    --input-border: #4a4a4a;
    --input-focus-border: #3399ff;
    --typing-dot: #888888;
    --live-tag-bg: rgba(255, 255, 255, 0.08);
    --live-tag-hover-bg: rgba(255, 255, 255, 0.12);
    --live-tag-text: #ffffff;
    --link-color: #66aaff;
    --link-hover: #88ccff;
    --scrollbar-thumb: rgba(255, 255, 255, 0.2);
    --scrollbar-thumb-hover: rgba(255, 255, 255, 0.3);
  }
}

/* Force dark mode with data-theme */
:root[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #0f0f0f;
  --bg-header-footer: #1a1a1a;
  --text-primary: #ffffff;
  --text-secondary: #aaaaaa;
  --border-color: #333333;
  --user-bubble-bg: linear-gradient(135deg, #3399ff 0%, #1a7acc 100%);
  --user-bubble-shadow: rgba(51, 153, 255, 0.15);
  --assistant-bubble-bg: linear-gradient(135deg, #3a3a3a 0%, #2f2f2f 100%);
  --assistant-bubble-shadow: rgba(0, 0, 0, 0.2);
  --assistant-bubble-base: #353535;
  --input-bg: #2a2a2a;
  --input-border: #4a4a4a;
  --input-focus-border: #3399ff;
  --typing-dot: #888888;
  --live-tag-bg: rgba(255, 255, 255, 0.08);
  --live-tag-hover-bg: rgba(255, 255, 255, 0.12);
  --live-tag-text: #ffffff;
  --link-color: #66aaff;
  --link-hover: #88ccff;
  --scrollbar-thumb: rgba(255, 255, 255, 0.2);
  --scrollbar-thumb-hover: rgba(255, 255, 255, 0.3);
}

/* Force light mode with data-theme */
:root[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-header-footer: #ffffff;
  --text-primary: #000000;
  --text-secondary: #666666;
  --border-color: #e0e0e0;
  --user-bubble-bg: linear-gradient(135deg, #3399ff 0%, #1a7acc 100%);
  --user-bubble-shadow: rgba(51, 153, 255, 0.15);
  --assistant-bubble-bg: linear-gradient(135deg, #e8e8e8 0%, #d8d8d8 100%);
  --assistant-bubble-shadow: rgba(0, 0, 0, 0.05);
  --assistant-bubble-base: #e0e0e0;
  --input-bg: #f5f5f5;
  --input-border: #d0d0d0;
  --input-focus-border: #3399ff;
  --typing-dot: #999999;
  --live-tag-bg: rgba(0, 0, 0, 0.08);
  --live-tag-hover-bg: rgba(0, 0, 0, 0.12);
  --live-tag-text: #000000;
  --link-color: #0066cc;
  --link-hover: #0052a3;
  --scrollbar-thumb: rgba(0, 0, 0, 0.2);
  --scrollbar-thumb-hover: rgba(0, 0, 0, 0.3);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-weight: 400;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Sticky Header */
#header {
  position: sticky;
  top: 0;
  background-color: var(--bg-header-footer);
  padding: 16px 80px;
  z-index: 100;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.03);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) #header {
    box-shadow: 0 2px 24px rgba(0, 0, 0, 0.2);
  }
}

:root[data-theme="dark"] #header {
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.2);
}

#header h1 {
  font-size: 20px;
  font-weight: 500;
  color: var(--text-primary);
  text-align: center;
}

/* Main Chat Container with auto-hide scrollbar */
#chat-container {
  flex: 1;
  overflow-y: scroll;
  overflow-x: hidden;
  padding: 20px 80px;
  background-color: var(--bg-secondary);
  position: relative;
  z-index: 1;
  scrollbar-width: thin;
  scrollbar-color: transparent transparent;
}

#chat-container:hover,
#chat-container:focus-within {
  scrollbar-color: var(--scrollbar-thumb) transparent;
}

/* Webkit scrollbar - auto-hide */
#chat-container::-webkit-scrollbar {
  width: 10px;
}

#chat-container::-webkit-scrollbar-track {
  background: transparent;
}

#chat-container::-webkit-scrollbar-thumb {
  background: transparent;
  border-radius: 10px;
  border: 2px solid transparent;
  background-clip: content-box;
  transition: background 0.2s ease;
}

#chat-container:hover::-webkit-scrollbar-thumb,
#chat-container:focus-within::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  background-clip: content-box;
}

#chat-container::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
  background-clip: content-box;
}

#chat-messages {
  max-width: 800px;
  margin: 0 auto;
}

/* Messages */
.message {
  margin-bottom: 15px;
  padding: 12px 16px;
  border-radius: 18px;
  max-width: 75%;
  line-height: 1.5;
  display: inline-block;
  word-wrap: break-word;
  box-shadow: 0 1px 3px var(--user-bubble-shadow);
}

.message.user {
  background: var(--user-bubble-bg);
  margin-left: auto;
  float: right;
  clear: both;
  color: #ffffff;
}

.message.assistant {
  background: var(--assistant-bubble-bg);
  box-shadow: 0 1px 3px var(--assistant-bubble-shadow);
  float: left;
  clear: both;
  color: var(--text-primary);
}

/* Typing indicator */
.message.typing {
  background: var(--assistant-bubble-bg);
  box-shadow: 0 1px 3px var(--assistant-bubble-shadow);
  padding: 12px 20px;
  float: left;
  clear: both;
  max-width: 80px;
}

.typing-dots {
  display: flex;
  gap: 4px;
  align-items: center;
  height: 20px;
}

.typing-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--typing-dot);
  animation: typing 1.4s infinite;
}

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

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

@keyframes typing {
  0%, 60%, 100% {
    opacity: 0.3;
    transform: translateY(0);
  }
  30% {
    opacity: 1;
    transform: translateY(-10px);
  }
}

/* Song container */
.message.song {
  background: transparent;
  box-shadow: none;
  max-width: 100%;
  padding: 0;
  float: left;
  clear: both;
  margin-bottom: 20px;
}

/* Spotify embed */
.song-embed {
  border-radius: 12px;
  margin-bottom: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Live show tag */
.live-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--live-tag-text);
  background: var(--live-tag-bg);
  padding: 6px 12px;
  border-radius: 12px;
  margin-bottom: 8px;
  font-weight: 500;
  float: right;
  clear: both;
  transition: background 0.15s ease;
  cursor: pointer;
}

.live-tag:hover {
  background: var(--live-tag-hover-bg);
}

.live-tag a {
  color: inherit;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.live-tag svg {
  width: 12px;
  height: 12px;
  stroke: currentColor;
}

/* Song story */
.song-story {
  background: var(--assistant-bubble-bg);
  box-shadow: 0 1px 3px var(--assistant-bubble-shadow);
  padding: 12px 16px;
  border-radius: 18px;
  max-width: 75%;
  line-height: 1.5;
  color: var(--text-primary);
  clear: both;
}

/* Clear floats */
#chat-messages::after {
  content: "";
  display: table;
  clear: both;
}

/* Sticky Input Footer */
#input-footer {
  position: sticky;
  bottom: 0;
  background-color: var(--bg-header-footer);
  padding: 16px 80px;
  z-index: 100;
  box-shadow: 0 -2px 20px rgba(0, 0, 0, 0.03);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) #input-footer {
    box-shadow: 0 -2px 24px rgba(0, 0, 0, 0.2);
  }
}

:root[data-theme="dark"] #input-footer {
  box-shadow: 0 -2px 24px rgba(0, 0, 0, 0.2);
}

/* Input wrapper - contains textarea and send button */
#input-wrapper {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  display: flex;
  align-items: flex-end;
}

#user-input {
  flex: 1;
  padding: 12px 50px 12px 16px;
  border: 1px solid var(--input-border);
  border-radius: 20px;
  background-color: var(--input-bg);
  color: var(--text-primary);
  font-size: 16px;
  font-family: 'Inter', sans-serif;
  resize: none;
  overflow: hidden;
  min-height: 44px;
  max-height: 200px;
  line-height: 1.5;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

#user-input::placeholder {
  color: var(--text-secondary);
}

#user-input:focus {
  outline: none;
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 2px rgba(51, 153, 255, 0.08);
}

#send-button {
  position: absolute;
  right: 12px;
  bottom: 12px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease;
  color: var(--link-color);
}

#send-button:hover {
  color: var(--link-hover);
}

#send-button:active {
  color: var(--link-hover);
}

#send-button svg {
  width: 20px;
  height: 20px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  #header,
  #input-footer {
    padding-left: 20px;
    padding-right: 20px;
  }
  
  #chat-container {
    padding-left: 20px;
    padding-right: 20px;
  }
}