/* CSS Custom Properties for consistent theming */
:root {
    /* Color Palette */
    --primary-bg: #0f0f0f;
    --secondary-bg: #1a1a1a;
    --tertiary-bg: #262626;
    --quaternary-bg: #333333;
    
    --primary-text: #ffffff;
    --secondary-text: #e0e0e0;
    --muted-text: #b3b3b3;
    
    --accent-primary: #007acc;
    --accent-primary-hover: #005999;
    --accent-secondary: #4a9eff;
    
    --user-message-bg: #1e3a8a;
    --ai-message-bg: #374151;
    
    --border-color: #404040;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --shadow-strong: rgba(0, 0, 0, 0.5);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 50%;
    
    /* Typography */
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-standard: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* Reset and Base Styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    height: 100vh;
    width: 100vw;
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
    color: var(--primary-text);
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    padding: var(--spacing-md);
    position: relative;
}

/* Background decoration */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(0, 122, 204, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(74, 158, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* Chat Container */
.chat-container {
    height: 80%;
    width: min(900px, 90%);
    max-width: 900px;
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: linear-gradient(145deg, var(--secondary-bg), var(--tertiary-bg));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    overflow-y: auto;
    overflow-x: hidden;
    box-shadow: 0 8px 32px var(--shadow-color);
    backdrop-filter: blur(10px);
    scrollbar-width: thin;
    scrollbar-color: var(--accent-primary) var(--tertiary-bg);
}

/* Custom Scrollbar */
.chat-container::-webkit-scrollbar {
    width: 6px;
}

.chat-container::-webkit-scrollbar-track {
    background: var(--tertiary-bg);
    border-radius: var(--radius-sm);
}

.chat-container::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.chat-container::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary-hover);
}

/* Chat Boxes */
.user-chatbox, 
.ai-chatbox {
    display: flex;
    align-items: flex-start;
    max-width: 85%;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    animation: slideIn 0.3s ease-out;
}

.user-chatbox {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.ai-chatbox {
    align-self: flex-start;
    flex-direction: row;
}

/* Slide-in animation for new messages */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Chat Message Areas */
.user-chat-area, 
.ai-chat-area {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 12px var(--shadow-color);
    font-size: var(--font-size-base);
    line-height: 1.6;
    word-wrap: break-word;
    max-width: 100%;
    transition: all var(--transition-fast);
    position: relative;
}

.user-chat-area {
    background: linear-gradient(135deg, var(--user-message-bg), #2563eb);
    color: var(--primary-text);
    border-radius: var(--radius-lg) var(--radius-lg) var(--radius-sm) var(--radius-lg);
    margin-left: auto;
}

.ai-chat-area {
    background: linear-gradient(135deg, var(--ai-message-bg), #4b5563);
    color: var(--primary-text);
    border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) var(--radius-sm);
    border: 1px solid var(--border-color);
}

/* Profile Images */
/* Profile Images */
.user-image,
.ai-image {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    object-fit: cover;
    box-shadow: 0 2px 8px var(--shadow-color);
    border: 2px solid var(--border-color);
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

#ai-image {
    width: 150px;
    height: 150px;
}

#user-image {
    width: 100px;
    height: 100px;
}

.user-image:hover,
.ai-image:hover {
    transform: scale(1.05);
}

/* Loading Animation */
.loading {
    width: 18px;
    height: 18px;
    transform: scale(2);
    filter: drop-shadow(2px 2px 5px var(--shadow-strong));
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.8;
        transform: scale(2);
    }
    50% {
        opacity: 1;
        transform: scale(2.2);
    }
}

/* Input & Prompt Section */
.prompt-area {
    height: 15%;
    width: min(900px, 90%);
    max-width: 900px;
    background-color: #1e1e1e;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
    gap: 10px;
    box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
}

.prompt-area input {
    flex: 1;
    height: 50px;
    width: 100%;
    background-color: #2a2a2a;
    padding: 10px;
    outline: none;
    border: none;
    border-radius: 25px;
    color: #ffffff;
    font-size: 22px;
    box-shadow: inset 2px 2px 5px #0d0d0d, inset -2px -2px 5px #2a2a2a;
    transition: all 0.3s;
}

.prompt-area input:focus {
    background-color: #3a3a3a;
    box-shadow: inset 3px 3px 7px #0d0d0d, inset -3px -3px 7px #3a3a3a;
}

.prompt-area button {
    height: 55px;
    width: 55px;
    border-radius: 50%;
    background: linear-gradient(145deg, #0b0d10, #010c19);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 3px 3px 8px #0d0d0d, -3px -3px 8px #2a2a2a;
    transition: all 0.3s ease-in-out;
}

.prompt-area button:hover {
    background: linear-gradient(145deg, #005FCC, #003E99);
}

.choose {
    height: 60%;
    width: 60%;
    border-radius: 50%;
}

/* Button icons */
#image-icon,
.prompt-area button img {
    height: 50%;
    width: 50%;
}

/* Responsive Design */
@media (max-width: 768px) {
    .chat-container {
        height: 80%;
        width: 95%;
        gap: 12px;
        padding: 7px;
    }

    .user-chatbox, .ai-chatbox {
        max-width: 92%;
        gap: 7px;
        padding: 5px;
    }

    .user-chat-area, .ai-chat-area {
        font-size: 18px;
        padding: 10px;
    }

    .user-chatbox{
        max-width: 70%;
    }

    #user-image, #ai-image {
        width: 80px;
        height: 80px;
    }

    .user-image{
        height: 80%;
        width: 80%;
    }

    .prompt-area {
        height: 15%;
        width: 95%;
        padding: 5px;
    }

    .prompt-area input {
        height: 45px;
        max-width: 80%;
        font-size: 20px;
    }

    .prompt-area button {
        height: 45px;
        width: 45px;
    }

    .choose,
    #image-icon,
    .prompt-area button img {
        height: 50%;
        width: 50%;
    }
}

@media (max-width: 480px) {
    body {
        margin: 0;
        padding: 0;
        height: 92vh;
    }
    .chat-container {
        height: 85%;
        width: 100%;
        background: none;
        margin: 0;
        border: none;
    }

    .user-chat-area, .ai-chat-area {
        font-size: 15px;
        /* max-width: 100%; */
        padding: 7px;
    }

    .ai-chatbox, .user-chatbox{
        max-width: 94%;
    }

    #user-image, #ai-image {
        width: 40px;
        height: 40px;
    }

    .user-image{
        height: 80%;
        width: 80%;
    }

    .prompt-area {
        height: 15%;
        width: 100%;
        padding: 10px;
        background: none;
    }

    .prompt-area input {
        height: 50px;
        max-width: 80%;
        font-size: 16px;
    }

    .prompt-area button {
        height: 50px;
        width: 50px;
    }

    .choose,
    #image-icon,
    .prompt-area button img {
        height: 45%;
        width: 45%;
    }
}