/* MSE Widget - v2.3 Optimized Styles */
:root {
    /* 默认颜色变量，会被 JS 动态设置的值或深色主题覆盖 */
    --mse-default-bg: #ffffff;
    --mse-default-icon: #555555;
    --mse-hover-bg: #0073aa;
    --mse-hover-icon: #ffffff;

    /* 浅色主题下的标签和面板颜色 */
    --mse-label-bg: #333333;
    --mse-label-text-color: #ffffff;
    --mse-panel-bg: #ffffff;
    --mse-panel-text-color: #333333;

    /* 基础尺寸与效果变量 */
    --mse-panel-qr-size: 130px;
    --mse-svg-icon-size: 50%;
    --mse-transition-duration: 0.3s;
    --mse-transition-timing: cubic-bezier(0.25, 0.1, 0.25, 1);
    --mse-default-shadow: 0 4px 12px rgba(0,0,0,0.15);
    --mse-label-font-size: 14px;
    --mse-label-gap: 15px;
    --mse-panel-gap: 15px;
}

/* 深色主题的颜色变量 (会覆盖 :root 中的默认颜色) */
[data-mse-theme="dark"] {
    --mse-label-bg: #1a202c;
    --mse-label-text-color: #e2e8f0;
    --mse-panel-bg: #4a5568;
    --mse-panel-text-color: #e2e8f0;
}

/* 挂件主体样式 */
.mse-style-widget {
    /* 这些变量将由 JS 根据配置动态设置 */
    --mse-widget-margin: 25px;
    --mse-icon-shape: 50%;
    --mse-icon-size: 52px;
    --mse-icon-gap: 15px;
    --mse-trigger-gap: 20px;

    position: fixed;
    z-index: 9998;
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.8);
    transition: opacity 0.4s ease, visibility 0.4s, transform 0.4s var(--mse-transition-timing);
}

.mse-style-widget.is-visible {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

/* 定位样式 */
.mse-position-right-top { right: var(--mse-widget-margin); top: var(--mse-widget-margin); }
.mse-position-right-middle { right: var(--mse-widget-margin); top: 50%; transform: translateY(-50%); }
.mse-position-right-bottom { right: var(--mse-widget-margin); bottom: var(--mse-widget-margin); }
.mse-position-left-top { left: var(--mse-widget-margin); top: var(--mse-widget-margin); }
.mse-position-left-middle { left: var(--mse-widget-margin); top: 50%; transform: translateY(-50%); }
.mse-position-left-bottom { left: var(--mse-widget-margin); bottom: var(--mse-widget-margin); }
.mse-style-widget.is-visible.mse-position-left-middle, .mse-style-widget.is-visible.mse-position-right-middle { transform: translateY(-50%) scale(1); }

/* 渠道列表 & 折叠动画 */
.mse-channels-list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--mse-icon-gap);
    margin: 0;
    padding: 0;
    margin-top: var(--mse-trigger-gap);
    transition: all var(--mse-transition-duration) var(--mse-transition-timing);
    transform-origin: top center;
}

.mse-style-widget.is-collapsed .mse-channels-list {
    transform: scale(0.6);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.mse-channel-item { position: relative; list-style: none; }

/* 图标按钮通用样式 */
.mse-icon-button {
    --bg: var(--mse-bg, var(--mse-default-bg));
    --icon: var(--mse-icon, var(--mse-default-icon));
    --hover-bg: var(--mse-hover-bg-custom, var(--mse-hover-bg));
    --hover-icon: var(--mse-hover-icon-custom, var(--mse-hover-icon));

    position: relative; display: flex; align-items: center; justify-content: center;
    width: var(--mse-icon-size); height: var(--mse-icon-size);
    padding: 0; border: none; cursor: pointer; text-decoration: none !important;
    background-color: var(--bg); color: var(--icon);
    border-radius: var(--mse-icon-shape); box-shadow: var(--mse-default-shadow);
    transition: all 0.2s ease-out;
}
.mse-icon-button:hover {
    background-color: var(--hover-bg); color: var(--hover-icon); transform: scale(1.1);
}
.mse-icon-button svg {
    width: var(--mse-svg-icon-size); height: var(--mse-svg-icon-size); fill: currentColor;
}

/* 标签 (Tooltip) 样式 */
.mse-icon-button::before {
    content: attr(data-label);
    position: absolute; padding: 5px 12px;
    background: var(--mse-label-bg); color: var(--mse-label-text-color);
    font-size: var(--mse-label-font-size); border-radius: 5px;
    white-space: nowrap; opacity: 0; visibility: hidden;
    transition: all 0.2s ease; pointer-events: none; z-index: 10;
}
.mse-icon-button:hover::before { opacity: 1; visibility: visible; }
[data-label-pos="left"]::before { right: calc(100% + var(--mse-label-gap)); top: 50%; transform: translateY(-50%); }
[data-label-pos="right"]::before { left: calc(100% + var(--mse-label-gap)); top: 50%; transform: translateY(-50%); }

/* 弹出面板 (Panel) 样式 */
.mse-reveal-panel {
    display: flex; flex-direction: column; align-items: center; gap: 10px;
    position: absolute; top: 50%;
    background-color: var(--mse-panel-bg); color: var(--mse-panel-text-color);
    padding: 15px; border-radius: 8px; box-shadow: var(--mse-default-shadow);
    opacity: 0; visibility: hidden;
    transition: all 0.3s ease; pointer-events: none;
    min-width: calc(var(--mse-panel-qr-size) + 30px);
    transform: translateY(-50%) translateX(10px);
}
.mse-channel-item.has-panel:hover .mse-reveal-panel {
    opacity: 1; visibility: visible; transform: translateY(-50%) translateX(0);
}
.mse-reveal-panel::after {
    content: ''; position: absolute; top: 50%;
    width: 10px; height: 10px; background-color: var(--mse-panel-bg);
    transform: translateY(-50%) rotate(45deg);
}
.mse-position-left-top .mse-reveal-panel, .mse-position-left-middle .mse-reveal-panel, .mse-position-left-bottom .mse-reveal-panel {
    left: calc(100% + var(--mse-panel-gap));
}
.mse-position-left-top .mse-reveal-panel::after, .mse-position-left-middle .mse-reveal-panel::after, .mse-position-left-bottom .mse-reveal-panel::after {
    left: -5px;
}
.mse-position-right-top .mse-reveal-panel, .mse-position-right-middle .mse-reveal-panel, .mse-position-right-bottom .mse-reveal-panel {
    right: calc(100% + var(--mse-panel-gap));
}
.mse-position-right-top .mse-reveal-panel::after, .mse-position-right-middle .mse-reveal-panel::after, .mse-position-right-bottom .mse-reveal-panel::after {
    right: -5px;
}
.mse-reveal-panel img { width: var(--mse-panel-qr-size); height: var(--mse-panel-qr-size); }
.mse-panel-text { font-size: 14px; text-align: center; }

/* 触发器图标切换动画 */
#mse-trigger .icon-wrapper {
    display: grid; place-items: center; width: 100%; height: 100%;
    transition: transform var(--mse-transition-duration) ease-in-out;
}
#mse-trigger .trigger-icon-open, #mse-trigger .trigger-icon-close {
    grid-area: 1 / 1;
    transition: opacity 0.2s ease;
    display: flex; align-items: center; justify-content: center;
}
.mse-style-widget:not(.is-collapsed) #mse-trigger .icon-wrapper { transform: rotate(180deg); }
.mse-style-widget:not(.is-collapsed) #mse-trigger .trigger-icon-open { opacity: 0; }
.mse-style-widget:not(.is-collapsed) #mse-trigger .trigger-icon-close { opacity: 1; }
.mse-style-widget.is-collapsed #mse-trigger .trigger-icon-open { opacity: 1; }
.mse-style-widget.is-collapsed #mse-trigger .trigger-icon-close { opacity: 0; }

/* 返回顶部按钮的显示/隐藏动画 */
.mse-back-to-top {
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    opacity: 0; visibility: hidden; transform: translateY(10px);
}
.mse-back-to-top.is-visible {
    opacity: 1; visibility: visible; transform: translateY(0);
}

/* 复制提示 Toast 的样式 */
#mse-copy-toast {
    position: fixed; z-index: 99999;
    padding: 15px 30px;
    background-color: rgba(0,0,0,0.8); /* 默认值，会被 JS 覆盖 */
    color: #ffffff; /* 默认值，会被 JS 覆盖 */
    border-radius: 8px; font-size: 16px;
    opacity: 0; visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
    backdrop-filter: blur(2px); text-align: center;
    transform: translateY(20px); max-width: 90%;
}
#mse-copy-toast.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
#mse-copy-toast.pos-top { top: 10%; left: 50%; transform: translateX(-50%) translateY(20px); }
#mse-copy-toast.pos-top.is-visible { transform: translateX(-50%) translateY(0); }
#mse-copy-toast.pos-center { top: 50%; left: 50%; transform: translate(-50%, -50%) translateY(20px); }
#mse-copy-toast.pos-center.is-visible { transform: translate(-50%, -50%) translateY(0); }
#mse-copy-toast.pos-bottom { bottom: 10%; left: 50%; transform: translateX(-50%) translateY(20px); }
#mse-copy-toast.pos-bottom.is-visible { transform: translateX(-50%) translateY(0); }

/* 响应式样式 */
@media (max-width: 768px) { /* 断点值会由 JS 动态设置在 .mse-style-widget 上 */
    .mse-channel-item.mse-hide-on-mobile { display: none; }
}
@media (min-width: 769px) {
    .mse-channel-item.mse-hide-on-pc { display: none; }
}