/* Modern Chat Interface with Unique Design */
:root {
    --primary-color: #7C3AED;  /* Vibrant Purple */
    --secondary-color: #4B5563;
    --accent-color: #EC4899;   /* Pink */
    --gradient-start: #7C3AED;
    --gradient-end: #EC4899;
    --background-color: #F3F4F6;
    --chat-bg: #FFFFFF;
    --message-user-bg: linear-gradient(135deg, #7C3AED 0%, #8B5CF6 100%);
    --message-bot-bg: #F9FAFB;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --text-light: #FFFFFF;
    --border-color: #E5E7EB;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    line-height: 1.6;
    background: var(--background-color);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    max-width: 1200px;
    height: 100vh;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    background: var(--chat-bg);
    position: relative;
    overflow: hidden;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

/* Header Styles */
.chat-header {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    padding: 1.2rem;
    color: var(--text-light);
    position: relative;
    overflow: hidden;
}

.header-content {
    position: relative;
    z-index: 1;
}

.bot-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.bot-avatar {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.bot-details {
    display: flex;
    flex-direction: column;
}

.bot-name {
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.bot-status {
    font-size: 0.9rem;
    opacity: 0.9;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #10B981;
    border-radius: 50%;
    display: inline-block;
}

/* Chat Area */
.chat-area {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    background: var(--background-color);
    scroll-behavior: smooth;
}

/* Message Styles */
.message {
    display: flex;
    align-items: flex-end;
    margin-bottom: 1rem;
    max-width: 70%;
    position: relative;
    transition: var(--transition);
}

.message.user {
    margin-left: auto;
    flex-direction: row-reverse;
}

.message-content {
    position: relative;
    transition: var(--transition);
}

.message-bubble {
    padding: 1rem 1.2rem;
    border-radius: 20px;
    position: relative;
    transition: var(--transition);
}

.message.user .message-bubble {
    background: var(--message-user-bg);
    color: var(--text-light);
    border-bottom-right-radius: 5px;
    box-shadow: var(--shadow-md);
}

.message.bot .message-bubble {
    background: var(--message-bot-bg);
    border-bottom-left-radius: 5px;
    box-shadow: var(--shadow-sm);
}

/* Image Message */
.message-image-container {
    margin-bottom: 0.5rem;
    border-radius: 15px;
    overflow: hidden;
    position: relative;
}

.message-image {
    max-width: 300px;
    border-radius: 15px;
    transition: var(--transition);
}

.message-caption {
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.message-time {
    font-size: 0.75rem;
    margin-top: 0.4rem;
    opacity: 0.8;
}

.user .message-time {
    color: var(--text-light);
}

/* Input Area */
.chat-input-area {
    padding: 1.2rem;
    background: var(--chat-bg);
    border-top: 1px solid var(--border-color);
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 0.8rem;
    background: var(--background-color);
    border-radius: 20px;
    padding: 0.8rem;
    transition: var(--transition);
}

.input-wrapper:focus-within {
    box-shadow: var(--shadow-md);
}

#messageInput {
    flex: 1;
    border: none;
    background: transparent;
    padding: 0.5rem;
    font-size: 1rem;
    max-height: 120px;
    resize: none;
}

#messageInput:focus {
    outline: none;
}

.input-actions {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.action-btn {
    background: transparent;
    border: none;
    padding: 0.6rem;
    border-radius: 12px;
    color: var(--secondary-color);
    cursor: pointer;
    transition: var(--transition);
}

.action-btn:hover {
    background: rgba(124, 58, 237, 0.1);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.send-btn {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.send-btn:hover {
    transform: translateY(-2px) rotate(15deg);
    box-shadow: var(--shadow-md);
}

/* Image Preview */
.image-preview-container {
    position: relative;
    margin-bottom: 1rem;
}

.preview-image {
    max-width: 150px;
    border-radius: 12px;
    border: 2px solid var(--primary-color);
}

.remove-preview {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--accent-color);
    color: white;
    border: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    box-shadow: var(--shadow-sm);
}

/* Typing Indicator */
.typing-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 1.2rem;
    background: var(--message-bot-bg);
    border-radius: 20px;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dot {
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
    opacity: 0.6;
    animation: typingBounce 1.4s infinite ease-in-out;
}

@keyframes typingBounce {
    0%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-4px); }
}

/* Toast Notification */
.error-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100%);
    background: linear-gradient(135deg, #EF4444, #DC2626);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 15px;
    font-size: 0.95rem;
    z-index: 2000;
    opacity: 0;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

.error-toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

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

    .message {
        max-width: 85%;
    }

    .message-image {
        max-width: 250px;
    }

    .input-wrapper {
        padding: 0.6rem;
    }

    .action-btn {
        padding: 0.5rem;
    }

    .send-btn {
        width: 40px;
        height: 40px;
    }
}