/* General Styles */
:root {
    --bg-color: #343541;
    --chat-bg-color: #444654;
    --text-color: #D1D5DB;
    --input-bg-color: #40414F;
    --input-border-color: #5E5F6E;
    --button-bg-color: #10A37F;
    --button-hover-bg-color: #0E8C6F;
    --message-user-bg: #343541;
    --message-assistant-bg: #444654;
    --message-border-radius: 0.5rem;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --typing-indicator-dot: #A0A0A0;
    --link-color: #8AB4F8;
}

body {
    margin: 0;
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden; /* Prevent scroll on body */
}

.chat-container {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 800px;
    height: 100vh; /* Full viewport height */
    background-color: var(--chat-bg-color);
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
    border-radius: 8px;
    overflow: hidden;
}

/* Header */
.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--input-bg-color);
    border-bottom: 1px solid var(--input-border-color);
    color: var(--text-color);
}

.chat-header h1 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
    flex-grow: 1;
    text-align: center;
}

.logo {
    width: 40px;
    height: 40px;
    margin-right: 1rem;
    object-fit: contain;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 5px;
    transition: background-color 0.2s ease;
}

.theme-toggle:hover {
    background-color: var(--input-border-color);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
}

/* Main Chat Area */
.chat-main {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    scroll-behavior: smooth;
}

.chat-messages {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--message-border-radius);
    max-width: 80%;
    word-wrap: break-word;
    line-height: 1.5;
}

.user-message {
    align-self: flex-end;
    background-color: var(--message-user-bg);
    color: var(--text-color);
}

.assistant-message {
    align-self: flex-start;
    background-color: var(--message-assistant-bg);
    color: var(--text-color);
}

.message-content {
    flex-grow: 1;
}

.message a {
    color: var(--link-color);
    text-decoration: none;
}

.message a:hover {
    text-decoration: underline;
}

/* Starter Prompts */
.starter-prompts {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    background-color: transparent; /* Override message background */
    padding: 0;
    max-width: 100%;
    align-self: center;
}

.starter-prompt-button {
    background-color: var(--input-bg-color);
    color: var(--text-color);
    border: 1px solid var(--input-border-color);
    padding: 0.75rem 1rem;
    border-radius: 1.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.starter-prompt-button:hover {
    background-color: var(--input-border-color);
    border-color: var(--button-bg-color);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.25rem;
    padding: 0.5rem 1rem;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    height: 20px; /* Reserve space */
}

.typing-indicator.visible {
    opacity: 1;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background-color: var(--typing-indicator-dot);
    border-radius: 50%;
    animation: bounce 1.4s 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 bounce {
  0%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-8px); }
}

/* Thinking Loader Animation */
.loader {
  height: 40px;
  aspect-ratio: 2;
  border: 8px solid var(--text-color);
  box-sizing: border-box;
  background:
    radial-gradient(farthest-side,var(--text-color) 98%,#0000) left/16px 16px,
    radial-gradient(farthest-side,var(--text-color) 98%,#0000) left/16px 16px,
    radial-gradient(farthest-side,var(--text-color) 98%,#0000) center/16px 16px,
    radial-gradient(farthest-side,var(--text-color) 98%,#0000) right/16px 16px,
    var(--message-assistant-bg);
  background-repeat: no-repeat;
  filter: blur(3px) contrast(8);
  animation: l14 1s infinite;
  margin: 0.5rem 0;
  border-radius: 8px;
}

@keyframes l14 {
  100%  {background-position:right,left,center,right}
}

/* New Original Thinking Animation */
.thinking-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px;
  margin: 8px 0;
}

.thinking-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--text-color);
  opacity: 0.3;
  animation: thinkingPulse 1.5s ease-in-out infinite;
}

.thinking-dot:nth-child(1) {
  animation-delay: 0s;
}

.thinking-dot:nth-child(2) {
  animation-delay: 0.5s;
}

.thinking-dot:nth-child(3) {
  animation-delay: 1s;
}

@keyframes thinkingPulse {
  0%, 80%, 100% {
    opacity: 0.3;
    transform: scale(0.8);
  }
  40% {
    opacity: 1;
    transform: scale(1.2);
  }
}

/* Footer and Input Area */
.chat-footer {
    padding: 1rem;
    background-color: var(--input-bg-color);
    border-top: 1px solid var(--input-border-color);
}

.input-area {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.input-area textarea {
    flex-grow: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--input-border-color);
    border-radius: var(--message-border-radius);
    background-color: var(--chat-bg-color);
    color: var(--text-color);
    font-size: 1rem;
    font-family: var(--font-family);
    outline: none;
    transition: border-color 0.2s ease, height 0.2s ease;
    resize: none; /* Disable manual resize */
    overflow-y: hidden; /* Hide scrollbar during auto-resize */
    min-height: 48px; /* Minimum height to match button height */
    max-height: 120px; /* Maximum height (about 5 lines) */
    line-height: 1.4;
}

.input-area textarea:focus {
    border-color: var(--button-bg-color);
}

/* Fallback for old input[type="text"] selector in case it's still referenced */
.input-area input[type="text"] {
    flex-grow: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--input-border-color);
    border-radius: var(--message-border-radius);
    background-color: var(--chat-bg-color);
    color: var(--text-color);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s ease;
}

.input-area input[type="text"]:focus {
    border-color: var(--button-bg-color);
}

.input-area button {
    background-color: var(--button-bg-color);
    color: white;
    border: none;
    border-radius: var(--message-border-radius);
    padding: 0.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease;
}

.input-area button:hover {
    background-color: var(--button-hover-bg-color);
}

.input-area button svg {
    width: 24px;
    height: 24px;
}

/* Voice Input Button Specifics */
.voice-input-button {
    position: relative;
    overflow: hidden;
}

.voice-input-button.recording {
    background-color: #E53E3E; /* Red for recording */
}

.voice-input-button.recording::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 1.5s infinite ease-out;
    z-index: 0;
}

@keyframes pulse {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .chat-container {
        border-radius: 0;
        height: 100vh;
        max-width: 100%;
    }

    .chat-header h1 {
        font-size: 1.2rem;
    }

    .message {
        max-width: 90%;
        padding: 0.6rem 0.8rem;
    }

    .input-area textarea {
        padding: 0.6rem 0.8rem;
        font-size: 0.9rem;
        min-height: 42px; /* Smaller minimum height on mobile */
    }
    
    .input-area input[type="text"] {
        padding: 0.6rem 0.8rem;
        font-size: 0.9rem;
    }

    .input-area button {
        padding: 0.6rem;
    }

    .starter-prompt-button {
        padding: 0.6rem 0.8rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 768px) {
    .chat-header h1 {
        font-size: 1rem;
    }

    .logo {
        width: 32px;
        height: 32px;
    }
}

@media (max-width: 480px) {
    .chat-header {
        padding: 0.75rem;
    }

    .chat-header h1 {
        font-size: 0.9rem;
    }

    .logo {
        width: 28px;
        height: 28px;
        margin-right: 0.5rem;
    }

    .chat-main {
        padding: 0.75rem;
    }

    .chat-footer {
        padding: 0.75rem;
    }

    .input-area {
        flex-wrap: wrap;
    }

    .input-area textarea {
        flex-basis: 100%;
        margin-bottom: 0.5rem;
        min-height: 40px; /* Even smaller on very small screens */
    }

    .input-area input[type="text"] {
        flex-basis: 100%;
        margin-bottom: 0.5rem;
    }

    .voice-input-button, .send-button {
        flex-grow: 1;
    }
}