/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* 头部样式 */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 2rem 1rem;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 主内容区域 */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 工具栏样式 */
.toolbar {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

#searchInput,
#categoryFilter {
    padding: 0.8rem 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    flex: 1;
    min-width: 200px;
    transition: all 0.3s ease;
}

#searchInput:focus,
#categoryFilter:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* 工具容器 */
.tool-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

/* 工具卡片样式 */
.tool-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid #eaeaea;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.tool-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.tool-card .category {
    display: inline-block;
    background: #667eea;
    color: white;
    padding: 0.2rem 0.8rem;
    border-radius: 50px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.tool-card a {
    display: inline-block;
    text-decoration: none;
    background: #667eea;
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 500;
    transition: background 0.3s ease;
}

.tool-card a:hover {
    background: #5a67d8;
}

/* 底部样式 */
footer {
    text-align: center;
    padding: 2rem 1rem;
    background: #333;
    color: white;
    margin-top: 3rem;
}

footer p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 空状态提示 */
.empty-state {
    text-align: center;
    padding: 4rem 1rem;
    color: #666;
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

/* 响应式调整 */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .toolbar {
        flex-direction: column;
    }
    
    #searchInput,
    #categoryFilter {
        min-width: auto;
    }
    
    .tool-container {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.8rem;
    }
    
    header p {
        font-size: 1rem;
    }
    
    .tool-container {
        grid-template-columns: 1fr;
    }
}

/* 添加工具区域样式 */
.add-tool-section {
    margin-bottom: 2rem;
}

.toggle-btn {
    background: #48bb78;
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.toggle-btn:hover {
    background: #38a169;
    transform: translateY(-2px);
}

.form-container {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-top: 1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 1px solid #eaeaea;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #444;
}

.form-group input[type="text"],
.form-group input[type="url"] {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.category-input-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.category-input-group select,
.category-input-group input[type="text"] {
    flex: 1;
    min-width: 150px;
    padding: 0.8rem 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.category-input-group select:focus,
.category-input-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.category-input-group span {
    color: #666;
    font-size: 1rem;
    white-space: nowrap;
}

.submit-btn {
    background: #667eea;
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    background: #5a67d8;
    transform: translateY(-2px);
}

/* 响应式调整表单 */
@media (max-width: 768px) {
    .form-container {
        padding: 1.5rem;
    }
    
    .category-input-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .category-input-group select,
    .category-input-group input[type="text"] {
        min-width: auto;
    }
    
    .category-input-group span {
        text-align: center;
        margin: 0.5rem 0;
    }
}

@media (max-width: 480px) {
    .toggle-btn,
    .submit-btn {
        width: 100%;
    }
}