/* 全局样式 */
:root {
    --primary-color: #4361ee;
    --primary-light: #4895ef;
    --primary-dark: #3a0ca3;
    --secondary-color: #f72585;
    --text-color: #2b2d42;
    --text-secondary: #6c757d;
    --background-color: #f8f9fa;
    --card-bg: rgba(255, 255, 255, 0.85);
    --border-color: #dee2e6;
    --input-bg: rgba(255, 255, 255, 0.9);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --mono-font: 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
    --danger-color: #e63946;
    --success-color: #43a047;
    --success-light: #e8f5e9;
    --error-color: #e53935;
    --error-light: #ffebee;
    --info-color: #1e88e5;
    --info-light: #e3f2fd;
    --border-radius: 12px;
    --box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, #4361ee, #3a0ca3);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

/* 容器样式 */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 30px;
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

.logo i {
    font-size: 2.5rem;
    margin-right: 10px;
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

.slogan {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 搜索框样式 */
.search-container {
    padding: 20px;
    background-color: #fff;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.search-box {
    display: flex;
    align-items: center;
    background-color: #f1f3f5;
    border-radius: 50px;
    padding: 10px 20px;
    max-width: 600px;
    margin: 0 auto;
}

.search-box i {
    color: var(--text-light);
    margin-right: 10px;
    font-size: 1.2rem;
}

.search-box input {
    border: none;
    background: transparent;
    width: 100%;
    padding: 8px 0;
    font-size: 1rem;
    outline: none;
    color: var(--text-color);
}

/* 分类标签样式 */
.category-tabs {
    display: flex;
    padding: 15px 20px;
    background-color: #fff;
    overflow-x: auto;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.tab {
    background: none;
    border: none;
    padding: 10px 20px;
    margin-right: 10px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.tab:hover {
    background-color: rgba(67, 97, 238, 0.1);
    color: var(--primary-color);
}

.tab.active {
    background-color: var(--primary-color);
    color: white;
}

/* 工具容器样式 */
.tools-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 25px;
    padding: 30px;
    background-color: var(--bg-color);
}

/* 工具卡片样式 */
.tool-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
}

.tool-header {
    display: flex;
    align-items: center;
    padding: 20px;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.tool-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 15px;
}

.tool-header h2 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-color);
}

.tool-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

/* 输入组样式 */
.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 0.95rem;
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
    transition: var(--transition);
}

textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
    outline: none;
}

/* 选择组样式 */
.select-group {
    margin-bottom: 20px;
}

.select-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.select-input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 0.95rem;
    background-color: white;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23333' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 15px;
}

.select-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
    outline: none;
}

/* 数字输入样式 */
.number-input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 0.95rem;
}

.number-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
    outline: none;
}

/* 文本输入样式 */
.text-input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 0.95rem;
}

.text-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
    outline: none;
}

/* 复选框组样式 */
.checkbox-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 20px;
}

.checkbox-item {
    display: flex;
    align-items: center;
}

.checkbox-item input[type="checkbox"] {
    margin-right: 8px;
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

/* 颜色选择器组样式 */
.color-picker-group {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    gap: 15px;
}

.color-picker-group input[type="color"] {
    width: 60px;
    height: 40px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

/* 按钮组样式 */
.button-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

button {
    cursor: pointer;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
}

.primary-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.secondary-btn {
    background-color: #e9ecef;
    color: var(--text-color);
}

.secondary-btn:hover {
    background-color: #dee2e6;
    transform: translateY(-2px);
}

/* 输出容器样式 */
.output-container {
    margin-top: auto;
    padding-top: 10px;
}

.output {
    background-color: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 15px;
    min-height: 60px;
    font-family: 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.9rem;
    word-break: break-all;
    white-space: pre-wrap;
}

/* PDF工具样式 */
.file-input {
    width: 100%;
    padding: 10px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 10px;
    cursor: pointer;
}

.select-input {
    width: 100%;
    padding: 10px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-color);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 30px;
}

.file-list-container {
    margin: 15px 0;
    max-height: 150px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--input-bg);
}

.file-list {
    padding: 8px;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background-color: rgba(255, 255, 255, 0.5);
    border-radius: 6px;
    margin-bottom: 8px;
}

.file-item:last-child {
    margin-bottom: 0;
}

.file-icon {
    margin-right: 8px;
    font-size: 18px;
}

.file-icon.pdf {
    color: #e74c3c;
}

.file-icon.image {
    color: #3498db;
}

.file-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-right: 10px;
}

.file-remove {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    font-size: 18px;
    padding: 0 5px;
}

.input-help {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
    margin-bottom: 10px;
}

.empty-message {
    padding: 15px;
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
}

.success-message {
    background-color: var(--success-light);
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid var(--success-color);
    margin-top: 15px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    background-color: var(--primary-color);
    color: white;
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    margin-top: 10px;
    transition: background-color 0.2s;
}

.download-btn:hover {
    background-color: var(--primary-dark);
}

.download-btn i {
    margin-right: 8px;
}

.progress-message {
    padding: 10px;
    margin: 10px 0;
    background-color: var(--info-light);
    color: var(--info-color);
    border-radius: 8px;
    text-align: center;
    font-size: 14px;
}

/* 页脚样式 */
.footer {
    background-color: #fff;
    padding: 20px;
    text-align: center;
    color: var(--text-light);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .tools-container {
        grid-template-columns: 1fr;
        padding: 20px;
    }
    
    .checkbox-group {
        grid-template-columns: 1fr;
    }
    
    .logo h1 {
        font-size: 2rem;
    }
    
    .logo i {
        font-size: 2rem;
    }
    
    .slogan {
        font-size: 1rem;
    }
    
    body {
        padding: 10px;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.tool-card {
    animation: fadeIn 0.5s ease forwards;
}