/* =========================================
   Tool UI - 高级文件处理工具公共样式库
   适用于：拖拽上传、双栏/多栏布局、控制面板等
   ========================================= */

.tool-container-standard {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 900px !important;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 30px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15) 0%, rgba(255, 255, 255, 0.05) 100%);
    backdrop-filter: blur(25px) saturate(180%);
    -webkit-backdrop-filter: blur(25px) saturate(180%);
    will-change: transform, backdrop-filter;
    transform: translateZ(0);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-medium), inset 0 1px 1px var(--glass-highlight), inset 0 -1px 1px rgba(255, 255, 255, 0.1);
    border-radius: 16px;
}

/* 拖拽上传区域 */
.upload-area {
    border: 2px dashed var(--primary-color);
    background: rgba(13, 148, 136, 0.05);
    border-radius: 16px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.upload-area:hover, .upload-area.drag-over {
    background: rgba(13, 148, 136, 0.1);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.upload-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.upload-subtext {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 8px;
}

#imageInput, #fileInput {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* 工作区域 */
.workspace {
    display: none;
    flex-direction: column;
    gap: 24px;
}

/* 模式切换 Tabs */
.tabs {
    display: inline-flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    padding: 6px;
    gap: 8px;
    align-self: center;
    margin-bottom: 10px;
}

.night-theme .tabs {
    background: rgba(255, 255, 255, 0.05);
}

.tabs .tab-btn {
    padding: 8px 24px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
}

.tabs .tab-btn:hover {
    color: var(--text-primary);
    background: rgba(0, 0, 0, 0.04);
}

.night-theme .tabs .tab-btn:hover {
    background: rgba(255, 255, 255, 0.08);
}

.tabs .tab-btn.active {
    background: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* 控制面板 */
.controls {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: rgba(0,0,0,0.02);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.night-theme .controls {
    background: rgba(255,255,255,0.02);
}

.control-group {
    display: flex;
    flex-direction: column;
}

/* 预览网格布局 */
.preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 600px) {
    .preview-grid {
        grid-template-columns: 1fr;
    }
}

.image-card, .file-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.card-header {
    padding: 12px 16px;
    background: rgba(0,0,0,0.03);
    border-bottom: 1px solid var(--glass-border);
    font-weight: 600;
    font-size: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.night-theme .card-header {
    background: rgba(255,255,255,0.03);
}

.img-container {
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 300px;
}

.transparent-bg {
    background: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAUSURBVDhPY3x8/O1/qhj1gIowDQCv8H05Bv1/0gAAAABJRU5ErkJggg==') repeat;
}

.img-container img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* 按钮样式 */
.action-row {
    display: flex;
    justify-content: center;
    padding: 0 16px 16px 16px;
}

.btn-primary, .btn-secondary {
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
}

.btn-primary {
    background: var(--primary-color);
    color: #fff;
    width: 100%;
}

.btn-primary:hover {
    filter: brightness(1.1);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(0,0,0,0.05);
}

.night-theme .btn-secondary:hover {
    background: rgba(255,255,255,0.05);
}

/* 加载动画覆盖层 */
#loadingOverlay {
    display: none;
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(4px);
    z-index: 20;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    border-radius: 12px;
}

.night-theme #loadingOverlay {
    background: rgba(0,0,0,0.8);
}

.spinner {
    border: 4px solid rgba(13, 148, 136, 0.2);
    border-left-color: var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}



/* 进度条 */
.progress-bar {
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    background: var(--primary-color);
    width: 0%;
    transition: width 0.3s;
}

/* =========================================
   图片压缩及滑块专属
   ========================================= */
.control-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

select.input-field {
    padding: 10px 14px;
    border-radius: 8px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    outline: none;
    cursor: pointer;
}

.range-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

input[type=range] {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
}
input[type=range]:focus { outline: none; }
input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 6px;
    cursor: pointer;
    background: rgba(13, 148, 136, 0.2);
    border-radius: 4px;
}
input[type=range]::-webkit-slider-thumb {
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    margin-top: -5px;
}

.stats-row {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 13px;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    color: var(--text-primary);
}

.stat-value {
    font-family: ui-monospace, 'Cascadia Code', 'SF Mono', Menlo, Consolas, monospace;
    font-size: 14px;
    font-weight: bold;
}

.stat-value.success {
    color: #10b981;
}

/* =========================================
   表单和输出展示区 (JSON、正则等通用)
   ========================================= */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.form-group label {
    font-size: 14px;
    color: var(--text-primary) !important;
    font-weight: 600;
}

.btn-group {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
}

.output-wrapper, #outputWrapper {
    display: none;
    position: relative;
    margin-top: 20px;
    background: var(--code-bg, rgba(0, 0, 0, 0.05));
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    overflow: hidden;
}

.night-theme .output-wrapper, .night-theme #outputWrapper {
    background: rgba(0, 0, 0, 0.3);
}

.json-output, #jsonOutput {
    width: 100%;
    height: 400px;
    padding: 16px;
    font-family: ui-monospace, 'Cascadia Code', 'SF Mono', Menlo, Consolas, monospace;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    background: transparent;
    border: none;
    resize: vertical;
    outline: none;
    box-sizing: border-box;
}

.error-message {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
    padding: 12px;
    border-radius: 8px;
    font-size: 14px;
    margin-top: 10px;
    display: none;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.action-bar {
    display: flex;
    justify-content: flex-end;
    padding: 8px 16px;
    background: rgba(128, 128, 128, 0.1);
    border-bottom: 1px solid var(--glass-border);
}

.action-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background 0.2s;
}

.action-btn:hover {
    background: rgba(128, 128, 128, 0.2);
    color: var(--text-primary);
}

/* =========================================
   通用输入框组件 (单行 / 多行)
   ========================================= */
.input-field, .input-textarea {
    width: 100%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: 15px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
}

.input-field {
    border-radius: 8px;
    padding: 12px 16px;
    font-family: inherit;
}

.input-textarea {
    border-radius: 12px;
    padding: 16px;
    font-family: ui-monospace, 'Cascadia Code', 'SF Mono', Menlo, Consolas, monospace;
    resize: vertical;
    min-height: 100px;
}

.input-field:focus, .input-textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

/* 响应式调整：移除固定比例限制，并让容器保留 2px 缝隙 */
@media (min-width: 768px) {
    .tool-container-standard {
        max-width: 800px;
        padding: 48px 40px;
    }
}

@media (max-width: 767px) {
    .tool-container-standard {
        width: calc(100% - 4px) !important;
        max-width: calc(100% - 4px) !important;
        margin-left: 2px !important;
        margin-right: 2px !important;
        padding: 32px 20px;
        border-radius: 4px !important;
    }
}

/* =========================================
   工具页指南与文章通用排版 (SEO文章/引导说明)
   包含折叠面板 Accordion 样式
   ========================================= */
.tool-article-guide {
    width: 100%;
    max-width: 1000px;
    margin: 60px auto 20px;
    padding: 30px 20px 0;
    box-sizing: border-box;
    border-top: 1px dashed var(--glass-border);
    line-height: 1.8;
    color: var(--text-primary);
    text-align: left;
}

.tool-article-guide > h2 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
    margin-top: 0;
    color: var(--text-primary);
}

/* Accordion (details / summary) 样式 - 极简嵌入风格 */
.tool-article-guide details {
    margin-bottom: 16px;
}

.tool-article-guide summary {
    font-size: 16px;
    font-weight: 600;
    padding: 8px 0;
    cursor: pointer;
    list-style: none; /* 隐藏默认箭头 */
    display: flex;
    align-items: center;
    color: var(--text-primary);
    transition: color 0.2s;
    user-select: none;
}

.tool-article-guide details[open] summary {
    color: var(--primary-color);
}

.tool-article-guide summary::-webkit-details-marker {
    display: none; /* Safari 隐藏箭头 */
}

.tool-article-guide summary:hover {
    color: var(--primary-color);
}

/* 自定义左侧箭头 */
.tool-article-guide summary::before {
    content: '▶';
    font-size: 12px;
    color: var(--text-secondary);
    transition: transform 0.2s ease;
    margin-right: 8px;
    display: inline-block;
}

.tool-article-guide details[open] summary::before {
    transform: rotate(90deg);
    color: var(--primary-color);
}

/* 折叠内容区 */
.tool-article-guide-content {
    padding: 8px 0 8px 20px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.tool-article-guide-content h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 16px 0 10px;
    color: var(--text-primary);
}

.tool-article-guide-content p {
    margin-bottom: 12px;
}

.tool-article-guide-content p:last-child {
    margin-bottom: 0;
}

.tool-article-guide-content ul {
    padding-left: 20px;
    margin-bottom: 12px;
}

.tool-article-guide-content ul li {
    margin-bottom: 6px;
}

.tool-article-guide-content ul li b {
    color: var(--primary-color);
    font-weight: 600;
}

.tool-article-guide-footer {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px dashed var(--glass-border);
    text-align: right;
    font-size: 14px;
    color: var(--text-secondary);
}

.tool-article-guide-footer a {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    position: relative;
}

.tool-article-guide-footer a:hover {
    color: var(--secondary-color);
}

.tool-article-guide-footer a::after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 1px;
    bottom: -2px;
    left: 0;
    background-color: var(--secondary-color);
    transform-origin: bottom right;
    transition: transform 0.25s ease-out;
}

.tool-article-guide-footer a:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

@media (max-width: 768px) {
    .tool-article-guide {
        padding: 20px 16px;
        border-radius: 12px;
        margin: 30px auto 16px;
    }
}