/* dnfs.css — 树状笔记页专属美化（在 theme.css / codeblock.css 之后加载，视觉语言与首页 index.css 对齐） */

::selection {
    background: var(--accent-glow);
    color: var(--fg);
}

/* ===== 页面底纹：极淡点阵 + 顶部暖光，增加层次不影响阅读 ===== */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image: radial-gradient(var(--border) 1px, transparent 1px);
    background-size: 26px 26px;
    -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 55%);
    mask-image: linear-gradient(180deg, #000 0%, transparent 55%);
    pointer-events: none;
}
body::after {
    content: "";
    position: fixed;
    left: 50%;
    top: -160px;
    width: 720px;
    height: 480px;
    transform: translateX(-50%);
    z-index: -1;
    background: radial-gradient(ellipse, var(--accent-glow), transparent 65%);
    opacity: 0.3;
    pointer-events: none;
}

/* ===== 节点卡片入场：逐张淡入（JS 动态插入时播放） =====
 * 防御性约定：只动画 opacity、不带 transform——祖先 transform 会成为 fixed 后代的包含块。
 * 全屏特效 iframe 现已直接挂载 body（见 dnfs.js renderSpJs），不再受卡片动画影响 */
@keyframes card-in {
    from { opacity: 0; }
    to { opacity: 1; }
}
/* 带位移的入场仅用于不含 fixed 后代的骨架元素；
 * 不含 .minimap——它自身依赖 transform: translateY(-50%) 垂直居中，动画会覆盖 */
@keyframes rise-in {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: no-preference) {
    .recommend-list .card { animation: card-in 0.45s ease both; }
    .recommend-list .card:nth-of-type(2) { animation-delay: 0.05s; }
    .recommend-list .card:nth-of-type(3) { animation-delay: 0.1s; }
    .recommend-list .card:nth-of-type(4) { animation-delay: 0.15s; }
    .recommend-list .card:nth-of-type(5) { animation-delay: 0.2s; }
    .recommend-list .card:nth-of-type(6) { animation-delay: 0.25s; }
    .recommend-list .card:nth-of-type(7) { animation-delay: 0.3s; }
    .recommend-list .card:nth-of-type(n+8) { animation-delay: 0.35s; }

    /* 首屏骨架元素入场 */
    .searchbox, .node-form { animation: rise-in 0.4s ease both; }
    .node-form { animation-delay: 0.1s; }
    .userpanel, .minimap { animation: card-in 0.4s ease both; }
}

/* ===== 搜索框：hover 升温（focus 高亮由 theme.css 提供） ===== */
.searchbox:hover {
    border-color: var(--border);
    box-shadow: var(--shadow-md);
}

/* ===== 节点编辑卡：品牌渐变顶条 + 聚焦光环 ===== */
.node-form {
    position: relative;
    overflow: hidden;
}
.node-form::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-dark));
    opacity: 0.85;
}
.node-form:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow), var(--shadow-md);
}

/* ===== 编辑卡按钮：提交渐变 / 重置柔色 / 删除警示 ===== */
#input-note-submit {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: #fff;
    box-shadow: 0 2px 10px rgba(232, 133, 58, 0.3);
    transition: transform 0.18s, box-shadow 0.22s, opacity 0.15s;
}
#input-note-submit:not(:disabled):hover {
    opacity: 1;
    transform: translateY(-1px);
    box-shadow: 0 5px 16px rgba(232, 133, 58, 0.38);
}
#input-note-submit:not(:disabled):active { transform: scale(0.96); }

#input-note-clear {
    background: var(--accent-soft);
    color: var(--accent-dark);
    border: 1px solid var(--accent-glow);
    transition: transform 0.18s, border-color 0.18s, opacity 0.15s;
}
#input-note-clear:not(:disabled):hover {
    opacity: 1;
    transform: translateY(-1px);
    border-color: var(--accent);
}
#input-note-clear:not(:disabled):active { transform: scale(0.96); }

#delete-note {
    background: var(--error-bg);
    color: var(--error);
    border: 1px solid transparent;
    transition: transform 0.18s, border-color 0.18s, opacity 0.15s;
}
#delete-note:not(:disabled):hover {
    opacity: 1;
    transform: translateY(-1px);
    border-color: var(--error);
}
#delete-note:not(:disabled):active { transform: scale(0.96); }