:root {
    --primary-color: #2c5aa0;
    --secondary-color: #e8f2ff;
    --strong-clor: black;
    --accent-color: #00a650;
    --text-dark: #333;
    --text-light: #666;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --chat-bg: white;
    --messages-bg: #fafafa;
    --input-bg: white;
    --avatar-shadow: 0 2px 8px rgba(0,0,0,0.1);
    --typing-bg: #f0f0f0;
    --scrollbar-track: #f1f1f1;
    --scrollbar-thumb: #c1c1c1;
    --scrollbar-thumb-hover: #a1a1a1;
    --code-bg: #f4f4f4;
    --pre-bg: #f8f8f8;
    --blockquote-bg: #f9f9f9;
}

/* Dark mode variables - black theme */
[data-theme="dark"] {
    --primary-color: #4a9eff;
    --secondary-color: #1a1a1a;
    --strong-color: white;
    --accent-color: #00d466;
    --text-dark: #e5e5e5;
    --text-light: #b0b0b0;
    --border-color: #333;
    --shadow: 0 2px 20px rgba(0,0,0,0.3);
    --bg-gradient: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 100%);
    --chat-bg: #1e1e1e;
    --messages-bg: #141414;
    --input-bg: #2a2a2a;
    --avatar-shadow: 0 2px 12px rgba(74, 158, 255, 0.3);
    --typing-bg: #2a2a2a;
    --scrollbar-track: #2a2a2a;
    --scrollbar-thumb: #555;
    --scrollbar-thumb-hover: #777;
    --code-bg: #2a2a2a;
    --pre-bg: #252525;
    --blockquote-bg: #252525;
}

* {
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

body { 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: var(--bg-gradient);
    height: 100vh;
    overflow: hidden;
    line-height: 1.6;
}

.chat-container {
    height: 100vh;
    max-width: none;
    margin: 0;
    background: var(--chat-bg);
    border-radius: 0;
    box-shadow: none;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.chat-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    text-align: center;
    border-radius: 12px 12px 0 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-content {
    flex: 1;
}

.chat-header h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 600;
}

.chat-header p {
    margin: 5px 0 0 0;
    opacity: 0.9;
    font-size: 0.9rem;
}

.header-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* Dark mode toggle button - Sexy design */
.theme-toggle {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    width: 60px;
    height: 32px;
    cursor: pointer;
    display: flex;
    align-items: center;
    padding: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-50%) scale(1.05);
}

.theme-toggle-slider {
    width: 26px;
    height: 26px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

[data-theme="dark"] .theme-toggle-slider {
    transform: translateX(28px);
    background: #1a1a1a;
    color: #4a9eff;
    box-shadow: 0 2px 12px rgba(74, 158, 255, 0.4);
}

#messages { 
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: var(--messages-bg);
    scroll-behavior: smooth;
    min-height: 0;
}

.message { 
    margin-bottom: 20px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
    flex-shrink: 0;
    box-shadow: var(--avatar-shadow);
}

.user .message-avatar {
    background: var(--primary-color);
    color: white;
    order: 2;
}

.assistant .message-avatar {
    background: var(--accent-color);
    color: white;
}

.message-content {
    flex: 1;
    padding: 12px 16px;
    border-radius: 18px;
    position: relative;
    max-width: 70%;
}

.user .message-content {
    background: var(--primary-color);
    color: white;
    margin-left: auto;
    order: 1;
}

.assistant .message-content {
    background: var(--chat-bg);
    border: 1px solid var(--border-color);
    color: var(--text-dark);
}

/* Markdown Styling */
.message-content h1, 
.message-content h2, 
.message-content h3 {
    margin: 0 0 10px 0;
    font-weight: 600;
}

.message-content h1 { font-size: 1.3rem; }
.message-content h2 { font-size: 1.2rem; }
.message-content h3 { font-size: 1.1rem; }

.message-content p {
    margin: 0 0 10px 0;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content ul, 
.message-content ol {
    margin: 10px 0;
    padding-left: 20px;
}

.message-content li {
    margin-bottom: 5px;
}

.message-content strong {
    font-weight: 600;
    color: var(--strong-color);
}

.message-content em {
    font-style: italic;
    color: var(--text-light);
}

.message-content code {
    background: var(--code-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 0.9em;
    color: var(--text-dark);
}

.message-content pre {
    background: var(--pre-bg);
    padding: 12px;
    border-radius: 6px;
    overflow-x: auto;
    border-left: 4px solid var(--primary-color);
}

.message-content blockquote {
    border-left: 4px solid var(--accent-color);
    margin: 10px 0;
    padding: 10px 15px;
    background: var(--blockquote-bg);
    font-style: italic;
}

.user .message-content strong {
    color: #ffffff;
    font-weight: 600;
}

.timestamp {
    font-size: 0.75rem;
    color: var(--text-light);
    text-align: center;
    margin: 10px 0;
}

#input-area { 
    display: flex;
    padding: 20px;
    background: var(--input-bg);
    border-top: 1px solid var(--border-color);
    gap: 12px;
    flex-shrink: 0;
}

#text-input { 
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
    background: var(--chat-bg);
    color: var(--text-dark);
}

#text-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.1);
}

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

#send-button { 
    padding: 12px 24px;
    border: none;
    background: var(--primary-color);
    color: white;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
    white-space: nowrap;
}

#send-button:hover {
    background: var(--accent-color);
    transform: scale(1.05);
}

#send-button:disabled {
    background: #666;
    cursor: not-allowed;
    transform: none;
}

.typing-indicator {
    display: none;
    padding: 10px 16px;
    background: var(--typing-bg);
    border-radius: 18px;
    margin-bottom: 10px;
    max-width: 70%;
}

.typing-indicator span {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-light);
    margin: 0 2px;
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

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

.connection-status {
    text-align: center;
    padding: 10px;
    font-size: 0.9rem;
    background: var(--secondary-color);
    color: var(--primary-color);
    flex-shrink: 0;
}

.error-message {
    background: #ffe6e6 !important;
    border-color: #ff9999 !important;
    color: #cc0000 !important;
}

[data-theme="dark"] .error-message {
    background: #3d1a1a !important;
    border-color: #661a1a !important;
    color: #ff6666 !important;
}

/* Scrollbar styling */
#messages::-webkit-scrollbar {
    width: 6px;
}

#messages::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

#messages::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 3px;
}

#messages::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover);
}

/* Enhanced Mobile responsiveness */
@media (max-width: 768px) {
    body { 
        padding: 0; 
    }
    
    .chat-container { 
        border-radius: 0;
        height: 100vh;
    }
    
    #messages { 
        padding: 15px 10px; 
    }
    
    .message-content { 
        max-width: 90%; 
        padding: 10px 14px;
    }
    
    .chat-header {
        padding: 15px;
    }
    
    .chat-header h1 { 
        font-size: 1.3rem; 
    }
    
    .chat-header p {
        font-size: 0.8rem;
    }
    
    #input-area {
        padding: 15px;
    }
    
    #text-input {
        font-size: 16px; /* Prevents zoom on iOS */
    }

    .theme-toggle {
        width: 50px;
        height: 28px;
        right: 15px;
    }

    .theme-toggle-slider {
        width: 22px;
        height: 22px;
        font-size: 10px;
    }

    [data-theme="dark"] .theme-toggle-slider {
        transform: translateX(22px);
    }
}

/* Large screen optimizations */
@media (min-width: 1200px) {
    .chat-container {
        max-width: 1200px;
        margin: 0 auto;
        height: 100vh;
        border-radius: 0;
    }
    
    #messages {
        padding: 30px;
    }
    
    .message-content {
        max-width: 60%;
    }
}

/* Simple loader styles */
#loader {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 10px;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border-left-color: #09f;
    animation: spin 1s ease infinite;
}

[data-theme="dark"] #loader {
    background: #121212;
    color: #fff;
}

[data-theme="dark"] .spinner {
    border-left-color: #0cf;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
} 

/* Session ID */
.session-id {
    font-size: 0.8rem;
    color: var(--text-dark);
    opacity: 0.8;
    margin-top: 4px;
}

[data-theme="dark"] .session-id {
    color: var(--text-light);
}

/* Reduce header size on short screens */
@media (max-height: 750px) {
    .chat-header {
        padding: 10px;
    }
    .chat-header h1 {
        font-size: 1.3rem;
    }
    .chat-header p {
        font-size: 0.75rem;
    }
    .session-id {
        font-size: 0.7rem;
    }
} 

.icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 8px;
    border: 1px solid var(--border, #ddd);
    background: var(--btn-bg, #fff);
    cursor: pointer;
    margin-left: 8px;
    transition: transform .06s ease, background .2s ease;
  }
  .icon-button:hover { transform: translateY(-1px); background: var(--btn-hover, #f6f6f6); }
  .icon-button svg { display: block; }
  

  .link-btn {
      cursor: pointer;
      text-decoration: underline;
      color: var(--primary-color); 
  }


  .dob-form {
    margin-top: 15px;
    background: var(--chat-bg, #fff);
    padding: 15px;
    border-radius: 12px;
    box-shadow: var(--shadow, 0 2px 10px rgba(0,0,0,0.1));
    max-width: 350px;
    font-family: Arial, sans-serif;
  }
  
  .dob-form label {
    font-weight: bold;
    color: var(--text-dark, #333);
    display: block;
    margin-bottom: 6px;
  }
  
  .dob-form input[type="date"] {
    padding: 8px 10px;
    border: 1px solid var(--border-color, #ccc);
    border-radius: 6px;
    font-size: 14px;
    width: 100%;
    margin-bottom: 10px;
  }
  
  .dob-form button {
    background: var(--primary-color, #2c5aa0);
    color: white;
    border: none;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.3s ease;
  }
  

  .asr-interim-text {
    text-align: center;
    font-style: italic;
    font-size: 0.9rem;
    color: var(--text-secondary, #666);
    margin: 0.3rem 0 0.5rem 0;
    min-height: 1.2rem;
    transition: opacity 0.2s ease;
  }