/* Chat Interface Styles */
/* Vanilla CSS for chatbot interface */

.chat-container {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 var(--spacing-unit);
}

.chat-header {
    text-align: center;
    margin-bottom: 2rem;
}

.chat-header h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.chat-header p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* Chat Window */
.chat-window {
    background-color: var(--color-surface);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    height: 600px;
    max-height: 70vh;
}

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-light);
}

/* Message Bubble */
.message {
    display: flex;
    gap: 0.75rem;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

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

.message.bot .message-avatar {
    background: var(--color-border);
    color: var(--color-text);
}

.message-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.message-sender {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-light);
}

.message-bubble {
    padding: 0.75rem 1rem;
    border-radius: 12px;
    max-width: 100%;
    word-wrap: break-word;
    line-height: 1.5;
}

.message.user .message-bubble {
    background: var(--color-primary);
    color: white;
    border-bottom-right-radius: 4px;
}

.message.bot .message-bubble {
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-bottom-left-radius: 4px;
}

.message-time {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-top: 0.25rem;
}

/* Empty State */
.chat-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--color-text-light);
    text-align: center;
    padding: 2rem;
}

.chat-empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.chat-empty-text {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.chat-empty-subtext {
    font-size: 0.85rem;
    opacity: 0.7;
}

/* Input Area */
.chat-input-container {
    padding: 1.5rem;
    border-top: 1px solid var(--color-border);
    background-color: var(--color-surface);
    border-bottom-left-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

.chat-input-form {
    display: flex;
    gap: 0.75rem;
}

.chat-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: 24px;
    background-color: var(--color-bg);
    color: var(--color-text);
    font-size: 0.95rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s ease;
}

.chat-input:focus {
    border-color: var(--color-primary);
}

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

.chat-send-button {
    padding: 0.75rem 1.5rem;
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: 24px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.chat-send-button:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
}

.chat-send-button:active {
    transform: translateY(0);
}

.chat-send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Loading Indicator */
.message.bot.loading .message-bubble {
    display: flex;
    gap: 0.5rem;
    padding: 1rem;
}

.typing-indicator {
    display: flex;
    gap: 0.3rem;
}

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

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

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

@keyframes typing {
    0%, 60%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    30% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .chat-container {
        margin: 1rem auto;
    }

    .chat-window {
        height: 500px;
        max-height: 60vh;
    }

    .chat-header h2 {
        font-size: 1.5rem;
    }

    .chat-messages {
        padding: 1rem;
    }

    .chat-input-container {
        padding: 1rem;
    }

    .chat-input-form {
        gap: 0.5rem;
    }

    .chat-send-button {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }

    .message-avatar {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }

    .message-bubble {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .chat-window {
        height: 450px;
        max-height: 55vh;
    }

    .chat-send-button {
        padding: 0.75rem 1rem;
    }
}