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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    min-height: 100vh;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

header {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 2rem 1.5rem;
    text-align: center;
}

header h1 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1rem;
    opacity: 0.9;
}

main {
    padding: 2rem 1.5rem;
}

.input-section {
    margin-bottom: 2rem;
}

.input-section label {
    display: block;
    margin-bottom: 0.8rem;
    font-weight: bold;
    color: #333;
}

.url-input-container {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

#article-url {
    flex: 1;
    min-width: 200px;
    padding: 12px 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s;
}

#article-url:focus {
    outline: none;
    border-color: #667eea;
}

#fetch-btn {
    padding: 12px 20px;
    background-color: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

#fetch-btn:hover {
    background-color: #5a6fd8;
}

#help-btn {
    width: 40px;
    height: 40px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background-color: #9b59b6;
    color: white;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: background-color 0.3s;
}

#help-btn:hover {
    background-color: #8e44ad;
}

.loading {
    text-align: center;
    padding: 2rem;
    color: #666;
}

.result-section {
    margin-top: 2rem;
}

.article-content {
    background-color: #fafafa;
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid #eee;
    max-height: 60vh;
    overflow-y: auto;
    margin-bottom: 1.5rem;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
    margin: 1rem 0 0.8rem 0;
    color: #2c3e50;
}

.article-content p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: 1rem 0;
}

.action-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.action-buttons button {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

#copy-btn {
    background-color: #4CAF50;
    color: white;
}

#copy-btn:hover {
    background-color: #45a049;
}

#save-btn {
    background-color: #2196F3;
    color: white;
}

#save-btn:hover {
    background-color: #1976D2;
}

footer {
    text-align: center;
    padding: 1.5rem;
    background-color: #f8f9fa;
    color: #666;
    font-size: 0.9rem;
    border-top: 1px solid #eee;
}

@media (max-width: 768px) {
    .container {
        margin: 0;
        box-shadow: none;
    }
    
    header {
        padding: 1.5rem 1rem;
    }
    
    main {
        padding: 1.5rem 1rem;
    }
    
    .url-input-container {
        flex-direction: column;
    }
    
    #article-url {
        min-width: 100%;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-buttons button {
        width: 100%;
    }
}