/* ===== Design Tokens ===== */
:root {
    --bg: #fdf6ee;
    --fg: #4a3728;
    --fg-secondary: #8c7260;
    --card: #ffffff;
    --card-hover: #fff7ef;
    --border: #f0e0cc;
    --border-light: #f7ecdd;
    --muted: #b89b7a;
    --accent: #e8853a;
    --accent-dark: #cf6b1f;
    --accent-soft: rgba(232, 133, 58, 0.10);
    --accent-glow: rgba(232, 133, 58, 0.25);
    --error: #d94f3d;
    --error-bg: #fef0ee;
    --success: #5a9e6f;
    --warning: #d4922a;
    --shadow-sm: 0 1px 3px rgba(74, 55, 40, 0.06);
    --shadow-md: 0 4px 12px rgba(74, 55, 40, 0.08);
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1e1712;
        --fg: #f0e4d8;
        --fg-secondary: #a08c78;
        --card: #2a2119;
        --card-hover: #342a20;
        --border: #3e3228;
        --border-light: #342a20;
        --muted: #8c7a66;
        --accent: #e8934a;
        --accent-dark: #f0a060;
        --accent-soft: rgba(232, 147, 74, 0.12);
        --accent-glow: rgba(232, 147, 74, 0.20);
        --error: #e8685a;
        --error-bg: #3a2220;
        --success: #6fb87f;
        --warning: #e0a84a;
        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
        --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    }
}

/* ===== Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', Roboto, Arial, sans-serif;
    padding: 2rem 1rem;
    -webkit-font-smoothing: antialiased;
}
body > .card,
body > .box { margin: auto 0; }

/* ===== Layout ===== */
.box { width: 90%; max-width: 720px; }
.card {
    background: var(--card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 1.75rem 1.5rem;
    box-shadow: var(--shadow-sm);
    color: var(--fg);
    transition: box-shadow 0.2s, border-color 0.2s;
    overflow-wrap: break-word;
    width: 90%;
    max-width: 440px;
}
.card:hover {
    border-color: var(--border);
    box-shadow: var(--shadow-md);
}
.box > .card { width: 100%; max-width: none; }

/* ===== Typography ===== */
h1 { font-size: 1.4rem; font-weight: 700; }
h2 { font-size: 1.25rem; font-weight: 700; margin-bottom: 1.25rem; }
h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.5rem; }

/* ===== Form Elements ===== */
label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--fg-secondary);
    margin-top: 1rem;
    margin-bottom: 0.3rem;
}
form > div > label:first-child { margin-top: 0; }

input:not([type="checkbox"]):not([type="submit"]):not([type="reset"]):not([type="button"]),
textarea {
    display: block;
    width: 100%;
    padding: 0.6rem 0.9rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: inherit;
    background: var(--bg);
    color: var(--fg);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}
input:not([type="checkbox"]):not([type="submit"]):not([type="reset"]):not([type="button"]):focus,
textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
input::placeholder, textarea::placeholder { color: var(--muted); }
textarea { min-height: 80px; resize: vertical; }

/* ===== Buttons ===== */
button, input[type="submit"], input[type="reset"], input[type="button"] {
    padding: 0.55rem 1.3rem;
    font-size: 0.88rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: opacity 0.15s, transform 0.1s;
    line-height: 1.4;
}
button:hover, input[type="submit"]:hover,
input[type="reset"]:hover, input[type="button"]:hover { opacity: 0.85; }
button:active, input[type="submit"]:active,
input[type="reset"]:active, input[type="button"]:active { transform: scale(0.96); }

input[type="submit"] { background: var(--accent); color: #fff; }
input[type="reset"] { background: transparent; color: var(--muted); border: 1.5px solid var(--border); }
button[type="button"], input[type="button"] { background: var(--accent-soft); color: var(--accent-dark); }

#emlSub { display: inline-block; margin-top: 0.4rem; }
#emlSub input[type="submit"] {
    background: var(--accent-soft);
    color: var(--accent-dark);
    font-size: 0.82rem;
    padding: 0.45rem 1rem;
}

/* ===== Form Layout ===== */
.form-actions {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin-top: 1.25rem;
}
/* ===== 防重复点击：请求进行中按钮禁用态反馈 ===== */
button:disabled,
input[type="submit"]:disabled,
input[type="button"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}
.form-check input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--accent); }
.form-check label {
    display: inline;
    margin: 0;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--fg-secondary);
}

/* ===== Code Box (register) ===== */
.code-box {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.4rem;
    font-size: 0.85rem;
    color: var(--fg-secondary);
}
.code-box input[type="text"] { width: auto; flex: 1; min-width: 100px; display: inline-block; }
.code-box input[type="button"] { white-space: nowrap; }

/* ===== Validation Tips ===== */
.tip-red { color: var(--error); font-size: 0.78rem; }
.tip-yellow { color: var(--warning); font-size: 0.78rem; }
.tip-green { color: var(--success); font-size: 0.78rem; }

/* ===== Article (dnfs) ===== */
.article-header { text-align: center; margin-bottom: 1.25rem; }
.article-header h1 { margin-bottom: 0.5rem; }
.article-meta { font-size: 0.82rem; color: var(--muted); margin-bottom: 0.3rem; }
.article-stats {
    font-size: 0.82rem;
    color: var(--muted);
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.article-stats span { font-weight: 600; color: var(--fg-secondary); }
#article-content { font-size: 0.95rem; line-height: 1.7; margin-bottom: 1.25rem; }

/* ===== Recommend List (dnfs) ===== */
/* 卡片尺寸随内容自适应：宽度包裹内容（fit-content），上限为容器宽度；高度天然随内容伸缩 */
.recommend-list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
}
.recommend-list br { display: none; }	/* JS 追加的 <br> 分隔符，改由 flex gap 统一控制间距 */
.recommend-list .card {
    width: fit-content;
    min-width: min(240px, 100%);
    max-width: 100%;
    margin-bottom: 0;
}
/* 防止内容中的大图撑破自适应宽度 */
.recommend-list .card img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
}
.recommend-list center {
    cursor: pointer;
    padding: 0.4rem;
    border-radius: var(--radius-sm);
    transition: background 0.15s;
}
.recommend-list center:hover { background: var(--accent-soft); }
.recommend-list center:hover h3 { color: var(--accent); }
.recommend-list .card h3 { transition: color 0.15s; }
.recommend-list .card p { font-size: 0.9rem; line-height: 1.6; color: var(--fg-secondary); }

/* ===== Owner Chip (dnfs 发帖用户) ===== */
.card-owner {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 0.2rem;
}
.owner-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent-soft);
    color: var(--accent-dark);
    border: 1px solid var(--accent);
    font-size: 0.7rem;
    font-weight: 700;
    flex-shrink: 0;
    user-select: none;
}
.owner-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--fg-secondary);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ===== Card Stats (dnfs 互动统计：观看/点赞/分享) ===== */
.card-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.1rem;
    margin-top: 0.45rem;
}
.stat-item {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.78rem;
    color: var(--muted);
}
.stat-item svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}
.stat-num {
    font-weight: 600;
    color: var(--fg-secondary);
    font-variant-numeric: tabular-nums;
}

/* ===== Card Actions (dnfs 编辑/删除按钮) ===== */
.card-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-top: 0.6rem;
}
.act-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.7rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    background: var(--accent-soft);
    color: var(--accent-dark);
    cursor: pointer;
    transition: border-color 0.15s, opacity 0.15s, transform 0.1s;
}
.act-btn svg { width: 12px; height: 12px; flex-shrink: 0; }
.act-btn:hover { border-color: var(--accent); }
.act-del { background: var(--error-bg); color: var(--error); }
.act-del:hover { border-color: var(--error); }
.act-move { background: transparent; color: var(--fg-secondary); border-color: var(--border); }
.act-move:hover { border-color: var(--accent); color: var(--accent-dark); }

/* ===== Move Bar (dnfs 节点移动条) ===== */
.movebar {
    position: fixed;
    left: 50%;
    bottom: 1.25rem;
    transform: translateX(-50%);
    z-index: 110;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.5rem 0.8rem;
    border-radius: var(--radius-md);
    background: rgba(253, 246, 238, 0.85);
    border: 1px solid var(--accent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-md);
    font-size: 0.82rem;
    max-width: 92vw;
}
@media (prefers-color-scheme: dark) {
    .movebar { background: rgba(30, 23, 18, 0.85); }
}
.movebar:empty { display: none; }
.move-title {
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--fg-secondary);
    font-weight: 600;
}

/* ===== Minimap (dnfs) ===== */
.minimap {
    position: fixed;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    max-height: 80vh;
    overflow-y: auto;
    padding: 0.6rem 0.75rem;
    border-radius: var(--radius-md);
    background: rgba(253, 246, 238, 0.72);
    border: 1px solid var(--border-light);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-md);
    transition: background 0.2s, border-color 0.2s;
}
@media (prefers-color-scheme: dark) {
    .minimap {
        background: rgba(30, 23, 18, 0.72);
        border-color: var(--border);
    }
}
.minimap:empty { display: none; }
.minimap .tag {
    display: inline-block;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 0.25rem 0.6rem;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--fg-secondary);
    background: rgba(232, 133, 58, 0.08);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    white-space: nowrap;
    transition: color 0.15s, background 0.15s, border-color 0.15s;
}
.minimap::-webkit-scrollbar { width: 4px; }
.minimap::-webkit-scrollbar-track { background: transparent; }
.minimap::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}
.minimap::-webkit-scrollbar-thumb:hover { background: var(--muted); }
.minimap .tag:hover {
    color: var(--accent-dark);
    background: var(--accent-soft);
    border-color: var(--accent);
}
.minimap .tag.back {
    color: var(--accent);
    background: var(--accent-soft);
    border-color: var(--accent);
    margin-bottom: 0.25rem;
}
.minimap .tag.fold-btn {
    color: var(--fg-secondary);
    background: transparent;
    border: 1px solid var(--border);
    font-weight: 600;
    margin-bottom: 0.3rem;
    text-align: center;
    max-width: none;
    cursor: pointer;
    transition: color 0.15s, background 0.15s, border-color 0.15s;
}
.minimap .tag.fold-btn:hover {
    color: var(--accent-dark);
    background: var(--accent-soft);
    border-color: var(--accent);
}

/* ===== Node Form (dnfs) ===== */
.node-form { margin-top: 1rem; }
.node-form .form-actions { margin-top: 0.75rem; }

/* ===== Markdown Content ===== */
code {
    color: var(--error);
    background: var(--error-bg);
    padding: 2px 6px;
    border-radius: 5px;
    font-size: 0.88em;
}
pre > code {
    display: block;
    color: #f0e4d8;
    background: #3d3229;
    padding: 12px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
}
blockquote {
    margin-right: 0;
    padding: 0.5rem 1rem;
    background: var(--accent-soft);
    border-left: 3px solid var(--accent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--fg-secondary);
}

/* ===== Footer ===== */
.footer {
    margin-top: auto;
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--muted);
}
.footer a {
    color: var(--muted);
    text-decoration: none;
    transition: color 0.15s;
}
.footer a:hover { color: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 480px) {
    body { padding: 1rem 0.8rem; }
    .card { padding: 1.25rem 1rem; border-radius: 16px; width: 95%; }
    .box { width: 95%; }
    h2 { font-size: 1.1rem; }
    .form-actions button, .form-actions input { flex: 1; padding: 0.5rem 0.6rem; font-size: 0.82rem; }
}
@media (max-width: 360px) {
    .card { padding: 1rem 0.8rem; border-radius: var(--radius-sm); }
}