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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f5f6fa;
    color: #2c3e50;
    line-height: 1.4;
}

/* 头部样式 */
.header {
    background-color: #fff;
    padding: 0.8rem 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.logo h1 {
    font-size: 1.2rem;
    margin: 0;
}

.subtitle {
    color: #3498db;
    font-size: 0.9rem;
    margin-left: 0.5rem;
    padding: 0.2rem 0.5rem;
    background-color: rgba(52, 152, 219, 0.1);
    border-radius: 4px;
}

/* 主容器样式 */
.container {
    max-width: 1200px;
    margin: 0.5rem auto;
    padding: 0 0.5rem;
}

/* 正则分类样式 */
.regex-categories {
    column-count: 3;
    column-gap: 0.5rem;
    margin: 0 auto;
}

.category {
    background: #fff;
    border-radius: 8px;
    padding: 0.8rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    break-inside: avoid;
    margin-bottom: 0.5rem;
    page-break-inside: avoid;
    -webkit-column-break-inside: avoid;
}

.category h2 {
    font-size: 1rem;
    color: #2c3e50;
    margin-bottom: 0.5rem;
    padding-bottom: 0.3rem;
    border-bottom: 2px solid #3498db;
}

.regex-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.5rem;
}

/* 正则项目和工具提示样式 */
.regex-item {
    padding: 0.5rem;
    background-color: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    text-align: center;
    position: relative;
}

.regex-item:hover {
    background-color: #3498db;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* 工具提示气泡 */
.regex-item::after {
    content: "点击获取正则表达式";
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.4rem 0.8rem;
    background-color: #2c3e50;
    color: #fff;
    font-size: 0.8rem;
    border-radius: 4px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 10;
    pointer-events: none;
}

/* 工具提示三角形 */
.regex-item::before {
    content: "";
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: #2c3e50;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 10;
    pointer-events: none;
}

/* 显示工具提示 */
.regex-item:hover::after {
    opacity: 1;
    visibility: visible;
    bottom: calc(100% + 10px);
}

.regex-item:hover::before {
    opacity: 1;
    visibility: visible;
    bottom: calc(100% + 4px);
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    z-index: 1000;
}

.modal-content {
    position: relative;
    background-color: #fff;
    margin: 2rem auto;
    padding: 1.5rem;
    width: 700px;
    max-width: 800px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    max-height: calc(100vh - 4rem);
    overflow-y: auto;
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: #666;
}

.close:hover {
    color: #e74c3c;
}

.regex-versions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

.version {
    background-color: #f8f9fa;
    padding: 0.8rem;
    border-radius: 4px;
}

.version h3 {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

pre {
    background-color: #fff;
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid #e9ecef;
    font-size: 0.85rem;
    overflow-x: auto;
}

.copy-btn {
    margin-top: 0.5rem;
    padding: 0.3rem 0.8rem;
    background-color: #3498db;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: background-color 0.2s;
}

.copy-btn:hover {
    background-color: #2980b9;
}

.regex-description {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #e9ecef;
}

.regex-description h3 {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.regex-description p {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.5;
}

/* 响应式调整 */
@media (max-width: 1024px) {
    .regex-categories {
        column-count: 2;
    }
}

@media (max-width: 768px) {
    .regex-categories {
        column-count: 1;
    }
    .regex-list {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
    .regex-versions {
        grid-template-columns: 1fr;
    }
    .modal-content {
        width: 95%;
        margin: 1rem auto;
    }
    .subtitle {
        display: none;
    }
    .container {
        padding: 0 0.3rem;
    }
    /* 移动端工具提示调整 */
    .regex-item::after {
        display: none;
    }
    
    .regex-item::before {
        display: none;
    }
}

.search-container {
    width: 100%;
    padding: 10px 0;
    display: flex;
    justify-content: center;
    margin-bottom: 10px;
}

.search-box {
    position: relative;
    width: 60%;
    max-width: 600px;
}

.search-box input {
    width: 100%;
    padding: 15px 45px 15px 20px;
    border: 2px solid #3498db;
    border-radius: 25px;
    font-size: 16px;
    transition: all 0.3s ease;
    outline: none;
    background-color: rgba(255, 255, 255, 0.9);
    box-shadow: 0 4px 6px rgba(52, 152, 219, 0.1);
}

.search-box input:focus {
    border-color: #2980b9;
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.2);
    background-color: #ffffff;
    transform: translateY(-1px);
}

.search-box input::placeholder {
    color: #95a5a6;
}

.search-box .search-icon {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: #3498db;
    font-size: 20px;
    pointer-events: none;
    transition: all 0.3s ease;
}

.search-box input:focus + .search-icon {
    color: #2980b9;
}

/* 搜索结果高亮样式 */
.regex-item.highlight {
    background-color: #fff3cd;
    border-color: #3498db;
    box-shadow: 0 2px 4px rgba(52, 152, 219, 0.15);
    transform: translateY(-1px);
}

.regex-item.hidden {
    display: none;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .search-box {
        width: 90%;
    }
    
    .search-container {
        padding: 15px 0;
    }
}