/* 第一部分：主题变量定义 */
:root {
    --hue: 210; /* 色调值，保持统一 */
    --popup-bg: grey; /* 新增：弹窗背景色，可改为 white、#f0f0f0 等 */

    /* 浅色主题变量 */
    --hsl-primary-dark: var(--hue) 0% 45%;
    --hsl-primary-contrast: var(--hue) 0% 50%;
    --hsl-primary-light: var(--hue) 0% 55%;

    --text1-light: hsl(var(--hue), 0%, var(--text-base-lightness-light));
    --text2-light: hsl(var(--hue), 0%, calc(var(--text-base-lightness-light) + 15%));
    --text3-light: hsl(var(--hue), 0%, calc(var(--text-base-lightness-light) + 30%));

    --surface1-light: hsl(var(--hue), 0%, calc(var(--surface-base-lightness-light) + -8%));
    --surface2-light: hsl(var(--hue), 0%, calc(var(--surface-base-lightness-light) + -3%));
    --surface3-light: hsl(var(--hue), 0%, var(--surface-base-lightness-light));

    --svg-file-flip-light: hsl(52, 0%, calc(var(--surface-base-lightness-light) - 20%));
    --svg-file-icon-light: hsl(19, 0%, calc(var(--surface-base-lightness-light) - 27%));
    --svg-folder-bg-light: hsl(var(--hue), 0%, 55%);
    --svg-folder-fg-light: hsl(var(--hue), 0%, 65%);
    --svg-folder-bg-large-light: hsl(var(--hue), 0%, 65%);
    --svg-folder-fg-large-light: hsl(var(--hue), 0%, 75%);

    /* 深色主题变量 */
    --text1-dark: hsl(var(--hue), 0%, var(--text-base-lightness-dark));
    --text2-dark: hsl(var(--hue), 0%, calc(var(--text-base-lightness-dark) + -15%));
    --text3-dark: hsl(var(--hue), 0%, calc(var(--text-base-lightness-dark) + -30%));

    --surface1-dark: hsl(var(--hue), 0%, var(--surface-base-lightness-dark));
    --surface2-dark: hsl(var(--hue), 0%, calc(var(--surface-base-lightness-dark) + 2%));
    --surface3-dark: hsl(var(--hue), 0%, calc(var(--surface-base-lightness-dark) + 4%));
    --surface4-dark: hsl(var(--hue), 0%, calc(var(--surface-base-lightness-dark) + 6%));
    --surface-selected-dark: hsl(var(--hue), 0%, 20%);
    --color-info-dark: hsl(var(--hue), 0%, calc(var(--surface-base-lightness-dark) + 12%));

    --svg-file-flip-dark: hsl(var(--hue), 0%, calc(var(--surface-base-lightness-dark) + 16%));
    --svg-file-icon-dark: hsl(var(--hue), 0%, calc(var(--surface-base-lightness-dark) + 32%));
    --svg-folder-bg-dark: hsl(var(--hue), 0%, 30%);
    --svg-folder-fg-dark: hsl(var(--hue), 0%, 40%);
    --svg-folder-bg-large-dark: hsl(var(--hue), 0%, 20%);
    --svg-folder-fg-large-dark: hsl(var(--hue), 0%, 28%);

    /* 通用变量 */
    --surface-active: var(--surface3);
    --primary: hsl(var(--hue), 0%, 50%);
}

/* 第二部分：为透明图片添加棋盘格背景 */
/* 全屏预览时的透明图片 */
img.pswp__img {
    background-image: url('data:image/jpeg;base64,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');
    background-size: 40px;
    background-repeat: repeat;
}

/* 文件列表缩略图上的透明图片 */
.files-img {
    background-image: url('data:image/jpeg;base64,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');
    background-size: 20px;
    background-repeat: repeat;
}

/* ===== 自定义页脚样式 ===== */

/* 让页脚固定在底部 */
#files-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.my-footer {
    margin-top: auto;
    width: 100%;
    padding: 10px 0 0 0;
}

/* 页脚主体样式 */
.my-footer .footer-content {
    text-align: center;
    padding: 24px 20px 20px;
    font-size: 14px;
    color: #888;
    line-height: 2;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    background: #fafbfc;
    border-radius: 0 0 8px 8px;
}

/* 深色主题适配 */
[data-theme="dark"] .my-footer .footer-content {
    background: #1a1e26;
    border-top-color: rgba(255, 255, 255, 0.06);
    color: #8892a8;
}

[data-theme="dark"] .my-footer .footer-content a {
    color: #9aa8c8;
}

[data-theme="dark"] .my-footer .footer-content a:hover {
    color: #c8d4e8;
}

/* 运行时间颜色 */
.my-footer .footer-content .run-time {
    color: #e74c3c;
    font-weight: 500;
    letter-spacing: 0.3px;
}

/* 链接样式 */
.my-footer .footer-content a {
    color: #4a6cf7;
    text-decoration: none;
    transition: color 0.2s, border-bottom 0.2s;
    border-bottom: 1px solid transparent;
}

.my-footer .footer-content a:hover {
    color: #3a5cd5;
    border-bottom-color: #3a5cd5;
}

/* 版权文字中的分隔符 */
.my-footer .footer-content .sep {
    color: #ddd;
    margin: 0 6px;
}

[data-theme="dark"] .my-footer .footer-content .sep {
    color: #3a4258;
}

/* 响应式适配 */
@media (max-width: 600px) {
    .my-footer .footer-content {
        font-size: 12px;
        padding: 16px 14px 14px;
        line-height: 1.8;
    }
}