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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 600px;
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    text-align: center;
    position: relative;
}

header h1 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.anycoder-link {
    color: white;
    text-decoration: none;
    font-size: 0.9rem;
    opacity: 0.9;
    transition: opacity 0.3s;
}

.anycoder-link:hover {
    opacity: 1;
}

main {
    padding: 20px;
    height: 500px;
    display: flex;
    flex-direction: column;
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    overflow: hidden;
    background: #f8f9fa;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    max-width: 80%;
    animation: fadeIn 0.3s ease;
}

.message.user {
    align-self: flex-end;
    background: #667eea;
    color: white;
    border-radius: 18px 18px 4px 18px;
}

.message.assistant {
    align-self: flex-start;
    background: white;
    border-radius: 18px 18px 18px 4px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.message-content {
    padding: 12px 16px;
    line-height: 1.5;
    font-size: 0.95rem;
}

.typing::after {
    content: '...';
    animation: typing 1.5s infinite;
}

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

@keyframes typing {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.input-area {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    padding: 15px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

#userInput {
    flex: 1;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 1rem;
    resize: none;
    outline: none;
    transition: border-color 0.3s;
}

#userInput:focus {
    border-color: #667eea;
}

.send-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 12px 24px;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.send-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

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

.status-panel {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 12px;
    border: 1px solid #e0e0e0;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.status-label {
    font-weight: 600;
    color: #666;
    min-width: 100px;
}

.status-value {
    color: #333;
    font-weight: 500;
}

.progress-bar {
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
    flex: 1;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    margin-left: 10px;
    color: #666;
    font-size: 0.9rem;
}

.error-message {
    background: #fee;
    color: #c33;
    padding: 10px;
    border-radius: 8px;
    margin-top: 10px;
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    .container {
        border-radius: 0;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    .input-area {
        flex-direction: column;
    }
    
    .send-button {
        padding: 12px;
    }
}