/**
 * AI 移除背景样式
 *
 * @package    Hui
 * @subpackage AI_RemoveBG
 * @since      1.5.0
 */

/* 页面容器 */
.hui-ai-removebg-page {
    min-height: 100vh;
    background: linear-gradient(180deg, 
        oklch(from var(--xun-secondary, var(--color-secondary)) 97% 0.02 h) 0%,
        var(--color-bg-layout) 100%
    );
    padding: 2rem 1rem 4rem;
}

/* Body 样式 */
body.hui-ai-removebg-body #masthead {
    background: var(--color-bg-container) !important;
    box-shadow: var(--shadow-sm) !important;
}

/* 强制禁用透明 Header */
body.hui-ai-removebg-body.has-transparent-header #masthead {
    background: var(--color-bg-container) !important;
    box-shadow: var(--shadow-sm) !important;
}

body.hui-ai-removebg-body .site-main {
    padding: 0 !important;
    margin: 0 !important;
    max-width: none !important;
}

body.hui-ai-removebg-body #colophon {
    display: none !important;
}

/* 页面头部 */
.hui-removebg-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.hui-removebg-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 0.5rem;
    background: linear-gradient(135deg, 
        var(--xun-primary, var(--color-primary)) 0%,
        var(--xun-secondary, var(--color-secondary)) 100%
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hui-removebg-subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin: 0 0 1.5rem;
}

/* 导航标签 */
.hui-removebg-nav {
    display: inline-flex;
    gap: 0.5rem;
    padding: 0.25rem;
    background: var(--color-bg-container);
    border-radius: var(--radius-full, 9999px);
    box-shadow: var(--shadow-sm);
}

.hui-removebg-nav-item {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-full, 9999px);
    transition: all 0.2s var(--ease-smooth);
}

.hui-removebg-nav-item:hover {
    color: var(--color-text);
    background: var(--color-fill-secondary);
}

.hui-removebg-nav-item.is-active {
    color: #fff;
    background: var(--xun-secondary, var(--color-secondary));
}

/* 主工作区 */
.hui-removebg-main {
    max-width: 900px;
    margin: 0 auto;
}

.hui-removebg-workspace {
    display: flex;
    gap: 0;
    background: var(--color-bg-container);
    border-radius: var(--xun-radius-lg, 16px);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

/* 左侧预览区 */
.hui-removebg-preview {
    flex: 1;
    min-height: 400px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, 
        oklch(from var(--xun-secondary, var(--color-secondary)) 95% 0.06 h) 0%,
        oklch(from var(--xun-primary, var(--color-primary)) 95% 0.06 h) 100%
    );
    overflow: hidden;
}

.hui-removebg-preview-placeholder,
.hui-removebg-preview-original,
.hui-removebg-preview-result {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.hui-removebg-preview-placeholder img,
.hui-removebg-preview-original img,
.hui-removebg-preview-result img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--xun-radius, 8px);
    box-shadow: var(--shadow-lg);
}

.hui-removebg-demo-img {
    animation: hui-removebg-float 3s ease-in-out infinite;
}

@keyframes hui-removebg-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* 透明背景网格 */
.hui-removebg-preview-result {
    position: relative;
}

.hui-removebg-transparent-bg {
    position: absolute;
    inset: 2rem;
    background-image: 
        linear-gradient(45deg, #e0e0e0 25%, transparent 25%),
        linear-gradient(-45deg, #e0e0e0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #e0e0e0 75%),
        linear-gradient(-45deg, transparent 75%, #e0e0e0 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    border-radius: var(--xun-radius, 8px);
}

.dark .hui-removebg-transparent-bg {
    background-image: 
        linear-gradient(45deg, #333 25%, transparent 25%),
        linear-gradient(-45deg, #333 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #333 75%),
        linear-gradient(-45deg, transparent 75%, #333 75%);
}

.hui-removebg-preview-result img {
    position: relative;
    z-index: 1;
}

/* 处理中状态 */
.hui-removebg-processing {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    z-index: 10;
    color: var(--color-text-secondary);
}

.dark .hui-removebg-processing {
    background: rgba(0, 0, 0, 0.8);
}

.hui-removebg-processing-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--xun-secondary, var(--color-secondary));
    border-radius: 50%;
    animation: hui-removebg-spin 0.8s linear infinite;
}

@keyframes hui-removebg-spin {
    to { transform: rotate(360deg); }
}

/* 右侧操作区 */
.hui-removebg-actions {
    width: 320px;
    flex-shrink: 0;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    border-left: 1px solid var(--color-border-secondary);
}

/* 上传按钮 */
.hui-removebg-upload-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.875rem 1.5rem;
    background: var(--xun-secondary, var(--color-secondary));
    color: #fff;
    border: none;
    border-radius: var(--xun-radius, 8px);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s var(--ease-smooth);
}

.hui-removebg-upload-btn:hover {
    background: var(--xun-secondary-hover, var(--color-secondary-dark));
    transform: translateY(-1px);
    box-shadow: 0 4px 12px oklch(from var(--xun-secondary, var(--color-secondary)) l c h / 0.3);
}

/* 粘贴提示 */
.hui-removebg-paste-hint {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin: 0.75rem 0 0;
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
}

/* 格式说明 */
.hui-removebg-format-hint {
    margin: 0.5rem 0 1.5rem;
    font-size: 0.75rem;
    color: var(--color-text-quaternary);
}

/* 示例图片 */
.hui-removebg-examples {
    width: 100%;
    margin-bottom: 1.5rem;
}

.hui-removebg-examples-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    margin-bottom: 0.5rem;
}

.hui-removebg-examples-list {
    display: flex;
    gap: 0.5rem;
}

.hui-removebg-example-item {
    width: 48px;
    height: 48px;
    padding: 0;
    border: 2px solid transparent;
    border-radius: var(--xun-radius-sm, 6px);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s var(--ease-smooth);
    background: none;
}

.hui-removebg-example-item:hover {
    border-color: var(--xun-secondary, var(--color-secondary));
    transform: scale(1.05);
}

.hui-removebg-example-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 操作按钮组 */
.hui-removebg-action-buttons,
.hui-removebg-download-buttons {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.hui-removebg-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--xun-radius, 8px);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s var(--ease-smooth);
}

.hui-removebg-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.hui-removebg-btn--primary {
    background: var(--xun-secondary, var(--color-secondary));
    color: #fff;
}

.hui-removebg-btn--primary:hover:not(:disabled) {
    background: var(--xun-secondary-hover, var(--color-secondary-dark));
    transform: translateY(-1px);
}

.hui-removebg-btn--secondary {
    background: var(--color-fill-secondary);
    color: var(--color-text);
}

.hui-removebg-btn--secondary:hover:not(:disabled) {
    background: var(--color-fill);
}

.hui-removebg-btn--success {
    background: var(--color-success);
    color: #fff;
}

.hui-removebg-btn--success:hover:not(:disabled) {
    filter: brightness(1.1);
    transform: translateY(-1px);
}

.hui-removebg-btn-cost {
    font-size: 0.75rem;
    opacity: 0.8;
    margin-left: 0.25rem;
}

/* 用户点数信息 */
.hui-removebg-points-info {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
    padding-top: 1.5rem;
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
}

.hui-removebg-points-item strong {
    color: var(--xun-secondary, var(--color-secondary));
    font-weight: 600;
}

.hui-removebg-points-divider {
    color: var(--color-border);
}

.hui-removebg-recharge-btn {
    padding: 0.25rem 0.75rem;
    background: var(--color-fill-secondary);
    color: var(--xun-secondary, var(--color-secondary));
    border: none;
    border-radius: var(--radius-full, 9999px);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s var(--ease-smooth);
}

.hui-removebg-recharge-btn:hover {
    background: var(--xun-secondary, var(--color-secondary));
    color: #fff;
}

/* 登录提示 */
.hui-removebg-login-hint {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: auto;
    padding-top: 1.5rem;
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
}

.hui-removebg-login-btn {
    padding: 0.25rem 0.75rem;
    background: var(--xun-secondary, var(--color-secondary));
    color: #fff;
    border: none;
    border-radius: var(--radius-full, 9999px);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s var(--ease-smooth);
}

.hui-removebg-login-btn:hover {
    background: var(--xun-secondary-hover, var(--color-secondary-dark));
}

/* 功能分类 */
.hui-removebg-categories {
    max-width: 900px;
    margin: 3rem auto 0;
}

.hui-removebg-categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.hui-removebg-category-card {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: var(--xun-radius-lg, 12px);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s var(--ease-smooth);
}

.hui-removebg-category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.hui-removebg-category-image {
    position: absolute;
    inset: 0;
}

.hui-removebg-category-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s var(--ease-smooth);
}

.hui-removebg-category-card:hover .hui-removebg-category-image img {
    transform: scale(1.05);
}

.hui-removebg-category-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 100%);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hui-removebg-category-icon {
    font-size: 1.25rem;
}

.hui-removebg-category-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: #fff;
}

/* 拖拽遮罩 */
.hui-removebg-dropzone-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.dark .hui-removebg-dropzone-overlay {
    background: rgba(0, 0, 0, 0.9);
}

.hui-removebg-dropzone-overlay.is-visible {
    display: flex;
}

.hui-removebg-dropzone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--xun-secondary, var(--color-secondary));
    font-size: 1.125rem;
    font-weight: 500;
}

.hui-removebg-dropzone-content svg {
    animation: hui-removebg-bounce 1s ease-in-out infinite;
}

@keyframes hui-removebg-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* 响应式 */
@media (max-width: 768px) {
    .hui-ai-removebg-page {
        padding: 1rem 0.75rem 2rem;
    }
    
    .hui-removebg-title {
        font-size: 1.75rem;
    }
    
    .hui-removebg-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hui-removebg-nav-item {
        padding: 0.375rem 0.875rem;
        font-size: 0.8125rem;
    }
    
    .hui-removebg-workspace {
        flex-direction: column;
    }
    
    .hui-removebg-preview {
        min-height: 280px;
    }
    
    .hui-removebg-actions {
        width: 100%;
        border-left: none;
        border-top: 1px solid var(--color-border-secondary);
    }
    
    .hui-removebg-categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .hui-removebg-categories-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }
    
    .hui-removebg-category-card {
        aspect-ratio: 1;
    }
}


/* Toast 提示 */
.hui-ai-removebg-toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    padding: 0.75rem 1.5rem;
    background: var(--color-bg-container);
    color: var(--color-text);
    border-radius: var(--radius-full, 9999px);
    box-shadow: var(--shadow-lg);
    font-size: 0.875rem;
    font-weight: 500;
    z-index: 10000;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s var(--ease-smooth);
}

.hui-ai-removebg-toast.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.hui-ai-removebg-toast.is-success {
    background: var(--color-success);
    color: #fff;
}

.hui-ai-removebg-toast.is-error {
    background: var(--color-error);
    color: #fff;
}

.hui-ai-removebg-toast.is-warning {
    background: var(--color-warning);
    color: #fff;
}

.hui-ai-removebg-toast.is-info {
    background: var(--xun-secondary, var(--color-secondary));
    color: #fff;
}