/* 顶部栏 */
.top-bar { height: 48px; min-height: 48px; background-color: var(--bg-panel); border-bottom: 1px solid var(--border-light); display: flex; align-items: center; padding: 0 16px; font-weight: bold; font-size: 14px; position: relative; z-index: 2000; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05); }
.top-bar > span:first-child { flex: 1; display: flex; align-items: center; }
.view-switcher { display: flex; background: var(--bg-body); border-radius: 6px; padding: 2px; border: 1px solid var(--border-light); }
.switcher-btn { padding: 4px 16px; border: none; background: transparent; color: var(--text-sub); font-weight: 600; font-size: 13px; border-radius: 4px; cursor: pointer; transition: all 0.2s ease; }
.switcher-btn:hover { color: var(--text-main); }
.switcher-btn.active { background: var(--bg-panel); color: var(--primary); box-shadow: 0 1px 2px rgba(0,0,0,0.05); }

/* 主布局 */
.layout { display: flex; flex: 1; height: calc(100vh - 50px); padding: 12px; gap: 12px; box-sizing: border-box; overflow: hidden; position: relative; }

/* 侧边栏 */
.sidebar { background: var(--bg-panel); border-radius: var(--radius-box); box-shadow: var(--shadow-md); display: flex; flex-direction: column; transition: width 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), min-width 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s cubic-bezier(0.34, 1.56, 0.64, 1); overflow: hidden; border: 1px solid var(--border-light); }
.left-sidebar { width: 420px; min-width: 420px; }
.right-sidebar { width: 280px; min-width: 280px; }
.sidebar.collapsed { width: 0 !important; min-width: 0 !important; opacity: 0; padding: 0; margin: 0; border: none; pointer-events: none; }

.empty-state { height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--text-sub); opacity: 0.6; }

.toggle-btn { position: absolute; top: 50%; transform: translateY(-50%); background: var(--bg-panel); border: 1px solid var(--border-light); width: 24px; height: 48px; display: flex; align-items: center; justify-content: center; cursor: pointer; z-index: 50; box-shadow: var(--shadow-sm); color: var(--text-sub); font-weight: bold; transition: var(--transition); }
.toggle-btn:hover { color: var(--primary); background: var(--bg-hover); }
.left-toggle { border-radius: 0 8px 8px 0; border-left: none; }
.right-toggle { border-radius: 8px 0 0 8px; border-right: none; }

.sidebar-header { padding: 16px; border-bottom: 1px solid var(--border-light); display: flex; justify-content: space-between; align-items: center; font-weight: 600; font-size: 14px; min-width: 250px;}
.sidebar-content { flex: 1; overflow-y: auto; padding: 0; min-width: 250px;}

/* 群组列表与列 */
.group-item { border-bottom: 1px solid var(--border-light); }
.group-title { display: flex; align-items: center; padding: 12px 16px; background: var(--bg-hover); cursor: pointer; font-weight: bold; gap: 8px; transition: var(--transition); border-left: 3px solid transparent; }
.group-title.is-active { background: var(--bg-focus); border-left-color: var(--primary); }
.group-title:hover { background: var(--bg-hover); }
.group-title-right { display: flex; align-items: center; gap: 4px; min-height: 28px; }
.group-actions { display: none; gap: 8px; }
.edit-group-input { font-weight: bold; font-size: 14px; }
.group-name-span { margin-right: auto; font-weight: bold; font-size: 14px; padding: 2px 4px; cursor: text; }

.group-columns { display: flex; height: 320px; }
.col { flex: 1; display: flex; flex-direction: column; border-right: 1px solid var(--border-light); }
.col:last-child { border-right: none; }
.col-header { padding: 8px 12px; font-size: 12px; color: var(--text-sub); background: var(--bg-panel); border-bottom: 1px solid var(--border-light); font-weight: bold; display: flex; justify-content: space-between; align-items: center;}
.col-list { flex: 1; overflow-y: auto; padding: 8px; }
.col:first-child {
    position: relative;
}
.col:first-child .col-header {
    position: relative;
    z-index: 2;
    background: var(--bg-panel);
}
.col:first-child .col-list,
.inline-dialogue-list {
    background-color: var(--bg-panel); /* 垫底色，防止背景图边缘抗锯齿与透明黑色混合产生黑边 */
    background-image: var(--bg-image-url, url('../img/bg1.jpg'));
    background-size: cover;
    background-position: top center;
    background-attachment: scroll; /* 随容器静态固定，不随视口缩放 */
    background-clip: padding-box; /* 防止背景图在圆角边框处出现 1px 的抗锯齿漏边 */
    padding: 0;
    border: 8px solid var(--bg-panel); /* 创造四周的底色区域 */
    box-shadow: inset 0 0 0 1.5px var(--bg-panel); /* 魔法：给图片内侧增加一圈极细的底色内阴影，人为向内收缩图片的边界，彻底盖住任何瑕疵！ */
    display: flex;
    flex-direction: column;
    flex: 0 1 auto; /* 不要强制撑满高度，让它自然匹配卡片内容高度！ */
}
/* 解决滚动条区域漏出背景图的问题：强制滚动条轨道为纯色 */
.col:first-child .col-list::-webkit-scrollbar-track,
.inline-dialogue-list::-webkit-scrollbar-track {
    background: var(--bg-panel);
}

/* 主舞台 */
.main-stage { flex: 1; position: relative; border-radius: var(--radius-box); box-shadow: var(--shadow-sm); overflow: hidden; background: var(--bg-panel); display: flex; flex-direction: column; isolation: isolate; }

/* 底层模糊背景 */
.main-stage:has(.stage-scroll:not(.simple-mode))::before {
    content: "";
    position: absolute;
    inset: -20px; /* 扩展边缘以防止模糊效果在边界处发虚露底 */
    z-index: -2;
    background-image: var(--bg-image-url, url('../img/bg1.jpg'));
    background-size: cover;
    background-position: center;
    filter: blur(15px);
}

/* 上层清晰背景 */
.main-stage:has(.stage-scroll:not(.simple-mode))::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image: var(--bg-image-url, url('../img/bg1.jpg'));
    background-position: center;
    background-repeat: no-repeat;
    /* 默认设为适应高度（横屏/内置背景图适用） */
    background-size: auto 100%;
    
    /* 边缘羽化遮罩，极速过渡以减少重影感 */
    -webkit-mask-image: 
        linear-gradient(to right, transparent 0%, black 2%, black 98%, transparent 100%),
        linear-gradient(to bottom, transparent 0%, black 2%, black 98%, transparent 100%);
    -webkit-mask-composite: source-in;
    -webkit-mask-size: 100% 100%, 100% 100%;
    -webkit-mask-position: center, center;
    -webkit-mask-repeat: no-repeat;
}

/* 当检测到背景为竖屏（长小于宽 / 竖向）时，宽度与卡片一致 */
html[data-bg-orientation="portrait"] .main-stage:has(.stage-scroll:not(.simple-mode))::after {
    background-size: min(85%, 765px) auto;
    
    /* 竖屏时让羽化遮罩完美贴合图片的真实宽度 */
    -webkit-mask-size: min(85%, 765px) 100%, 100% 100%;
}
.stage-header { padding: 12px 20px; background: rgba(255,255,255,0.9); border-bottom: 1px solid var(--border-light); font-weight: bold; font-size: 14px; z-index: 10; display: flex; align-items: center; gap: 8px; backdrop-filter: blur(4px); }