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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f5f5f5;
    height: 100vh;
    overflow: hidden;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.chat-header {
    background-color: #000000;
    color: white;
    padding: 1rem;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    gap: 1rem;

    h1 {
        margin: 0;
        font-size: 1.5rem;
        font-weight: 600;
    }

    .model-selector {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        flex-wrap: wrap;
        
        label {
            font-weight: 500;
            font-size: 0.9rem;
        }
        
        select {
            background-color: white;
            color: #374151;
            border: 1px solid #d1d5db;
            border-radius: 6px;
            padding: 0.5rem 0.75rem;
            font-size: 0.9rem;
            font-family: inherit;
            cursor: pointer;
            min-width: 200px;
            
            &:focus {
                outline: none;
                border-color: #663c99;
                box-shadow: 0 0 0 2px rgba(29, 78, 216, 0.2);
            }
            
            option {
                padding: 0.5rem;
            }
        }
        
        .streaming-toggle {
            display: flex;
            align-items: center;
            margin-left: 1rem;
            
            label {
                display: flex;
                align-items: center;
                gap: 0.5rem;
                cursor: pointer;
                font-size: 0.9rem;
                
                input[type="checkbox"] {
                    cursor: pointer;
                }
            }
        }
    }
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background-color: #fafafa;
}

.message {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
    border-radius: 12px;
    max-width: 80%;
    word-wrap: break-word;

    &.user-message {
        align-self: flex-end;
        background-color: #2563eb;
        color: white;

        .message-role {
            font-weight: 600;
            font-size: 0.8rem;
            opacity: 0.8;
            text-transform: uppercase;
        }

        .message-content {
            line-height: 1.5;
        }
    }

    &.assistant-message {
        align-self: flex-start;
        background-color: #646873;
        border: 1px solid #e5e7eb;
        color: #f3f3f3;

        .message-role {
            font-weight: 600;
            font-size: 0.8rem;
            color: #c4c5cd;
            text-transform: uppercase;
        }

        .message-content {
            line-height: 1.5;
        }

        &.loading {
            background-color: #f3f4f6;
            border-color: #d1d5db;

            .message-content {
                font-style: italic;
                color: #6b7280;
            }
        }
        
        &.streaming {
            .message-content {
                .cursor {
                    display: inline-block;
                    animation: blink 1s infinite;
                    color: #9ca3af;
                }
            }
        }
    }
}

.error-message {
    background-color: #fef2f2;
    border: 1px solid #fca5a5;
    color: #dc2626;
    padding: 1rem;
    margin: 0 1rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
}

.chat-input {
    display: flex;
    gap: 0.5rem;
    padding: 1rem;
    background-color: white;
    border-top: 1px solid #e5e7eb;

    textarea {
        flex: 1;
        padding: 0.75rem;
        border: 1px solid #d1d5db;
        border-radius: 8px;
        resize: none;
        min-height: 60px;
        max-height: 120px;
        font-family: inherit;
        font-size: 1rem;
        line-height: 1.5;

        &:focus {
            outline: none;
            border-color: #663c99;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        &.disabled {
            background-color: #f9fafb;
            color: #6b7280;
            cursor: not-allowed;
        }
    }

    button {
        padding: 0.75rem 1.5rem;
        background-color: #663c99;
        color: white;
        border: none;
        border-radius: 8px;
        font-weight: 600;
        cursor: pointer;
        transition: background-color 0.2s ease;
        align-self: flex-end;

        &:hover:not(.disabled) {
            background-color: #663c99;
        }

        &.disabled {
            background-color: #9ca3af;
            cursor: not-allowed;
        }

        &:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
        }
    }
}

/* Scrollbar styling for webkit browsers */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Cursor blink animation */
@keyframes blink {
    0%, 50% {
        opacity: 1;
    }
    51%, 100% {
        opacity: 0;
    }
}