:root {
  --bg: #fbf6ef;
  --bg-card: #ffffff;
  --ink: #4a3f35;
  --ink-soft: #8a7a6a;
  --line: #ecdfce;
  --accent: #e08e5a;
  --accent-dark: #c9763f;
  --accent-soft: #fbe9da;
  --danger: #c0533f;
  --ok: #5a9367;
  --shadow: 0 6px 22px rgba(180, 130, 90, 0.14);
  --radius: 14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.6;
}
button { font-family: inherit; cursor: pointer; }
a { color: var(--accent-dark); }

/* ---------- 登录视图 ---------- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.login-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 38px 34px;
  width: 100%;
  max-width: 360px;
}
.login-card .logo { font-size: 34px; text-align: center; margin-bottom: 6px; }
.login-card h1 { font-size: 19px; text-align: center; margin: 0 0 4px; }
.login-card .sub { text-align: center; color: var(--ink-soft); font-size: 13px; margin-bottom: 22px; }
.login-foot { text-align: center; margin-top: 14px; }
.link-home { font-size: 13px; color: var(--ink-soft); text-decoration: none; letter-spacing: .02em; }
.link-home:hover { color: var(--accent-dark); text-decoration: underline; }

/* ---------- 表单 ---------- */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--ink-soft); margin-bottom: 5px; }
.field input, .field textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fffdfb;
  color: var(--ink);
  font-size: 14px;
  font-family: inherit;
  transition: border-color .15s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.field textarea { resize: vertical; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 16px;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  background: var(--accent);
  color: #fff;
  transition: background .15s, transform .05s;
}
.btn:hover { background: var(--accent-dark); }
.btn:active { transform: translateY(1px); }
.btn.block { width: 100%; }
.btn.ghost { background: transparent; color: var(--ink-soft); border: 1px solid var(--line); }
.btn.ghost:hover { background: var(--accent-soft); color: var(--accent-dark); }
.btn.danger { background: var(--danger); }
.btn.danger:hover { filter: brightness(.94); }
.btn.sm { padding: 6px 12px; font-size: 13px; }

.msg { font-size: 13px; margin-top: 10px; min-height: 18px; }
.msg.err { color: var(--danger); }
.msg.ok { color: var(--ok); }

/* ---------- 后台布局 ---------- */
.topbar {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 22px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 5;
}
.topbar .brand { font-weight: 700; font-size: 17px; display: flex; align-items: center; gap: 8px; }
.topbar .spacer { flex: 1; }
.topbar .who { color: var(--ink-soft); font-size: 13px; }

.layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 18px;
  padding: 18px 22px;
  align-items: start;
}
.layout.with-help { grid-template-columns: 260px 1fr 270px; }
.layout.about-mode { grid-template-columns: 1fr; }
@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; }
  .layout.with-help { grid-template-columns: 1fr; }
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.panel .panel-head {
  padding: 12px 16px; border-bottom: 1px solid var(--line);
  font-weight: 600; display: flex; align-items: center; justify-content: space-between;
}
.postlist { max-height: calc(100vh - 160px); overflow: auto; }
.postlist .item {
  padding: 11px 16px; border-bottom: 1px solid var(--line); cursor: pointer;
}
.postlist .item:hover { background: var(--accent-soft); }
.postlist .item.active { background: var(--accent-soft); border-left: 3px solid var(--accent); }
.postlist .item .t { font-weight: 600; }
.postlist .item .m { font-size: 12px; color: var(--ink-soft); margin-top: 2px; }
.tag {
  display: inline-block; font-size: 11px; padding: 1px 8px; border-radius: 20px;
  background: var(--accent-soft); color: var(--accent-dark); margin-right: 4px;
}

.editor { padding: 16px; }
.editor .row { display: flex; gap: 12px; flex-wrap: wrap; }
.editor .row .field { flex: 1; min-width: 160px; }
.editor .actions { display: flex; gap: 10px; margin: 14px 0; flex-wrap: wrap; }
.emoji-bar { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin: 4px 0 2px; position: relative; }
.emoji-bar-label { font-size: 13px; color: var(--ink-soft); margin-right: 2px; }
.emoji-btn {
  border: 1px solid var(--line); background: #fff; border-radius: 8px;
  font-size: 18px; line-height: 1; padding: 4px 6px; cursor: pointer;
  transition: transform .08s ease, background .15s ease, border-color .15s ease;
}
.emoji-btn:hover { background: var(--bg); border-color: var(--accent); transform: translateY(-2px); }
.emoji-btn:active { transform: translateY(0) scale(.94); }

/* 更多表情弹出面板 */
.emoji-popup {
  position: absolute; right: 0; top: 100%; z-index: 50;
  width: 340px; max-height: 360px;
  background: #fff; border: 1px solid var(--line);
  border-radius: 12px; box-shadow: 0 8px 30px rgba(0,0,0,.12);
  overflow-y: auto; margin-top: 4px;
}
.emoji-popup-head { display:flex; justify-content:space-between; align-items:center; padding:8px 12px; border-bottom:1px solid var(--line); font-weight:700; font-size:13px; position:sticky; top:0; background:#fff; }
.emoji-grid { display:flex; flex-wrap:wrap; gap:2px; padding:6px; }
.emoji-cat-head { width:100%; font-weight:700; font-size:12px; color:var(--accent-dark); padding:6px 4px 2px; letter-spacing:.03em; }
.emoji-cat-sep { width:100%; font-weight:600; font-size:11.5px; color:var(--ink-soft); padding:5px 4px 1px; border-top:1px dashed var(--line); margin-top:2px; }
.emoji-grid-btn {
  border:none; background:none; font-size:20px; line-height:1; padding:3px 4px; cursor:pointer;
  border-radius:6px; transition:background .08s,transform .06s; min-width:28px;text-align:center;
}
.emoji-grid-btn:hover { background:#f1e6d8; transform:scale(1.15); }

.preview {
  border: 1px solid var(--line); border-radius: 10px; padding: 16px 20px;
  background: #fffdfb; min-height: 200px;
}
.preview h1, .preview h2, .preview h3 { color: var(--ink); }
.preview pre { background: #2b2620; color: #f5e9da; padding: 12px 14px; border-radius: 8px; overflow: auto; }
.preview code { background: #f1e6d8; padding: 1px 5px; border-radius: 4px; font-size: 13px; }
.preview pre code { background: none; padding: 0; }
.preview blockquote { border-left: 3px solid var(--accent); margin: 10px 0; padding: 4px 14px; color: var(--ink-soft); }
.preview table { border-collapse: collapse; }
.preview th, .preview td { border: 1px solid var(--line); padding: 6px 10px; }
.preview img { max-width: 100%; cursor: zoom-in; }

/* ---------- 标签多选 chip 组件 ---------- */
.tag-picker { border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; background: #fffdfb; }
.tag-chips { display: flex; flex-wrap: wrap; gap: 5px; min-height: 26px; }
.chip {
  display: inline-block; padding: 3px 10px; border-radius: 20px;
  font-size: 12.5px; background: #f1e6d8; color: var(--ink-soft);
  cursor: pointer; transition: background .15s, color .15s, box-shadow .15s;
  user-select: none; border: 1px solid transparent;
}
.chip:hover { filter: brightness(0.95); }
.chip.active { font-weight: 600; }
.tag-input { width: 100%; border: none; outline: none; padding: 4px 0 0; font-size: 13px; background: transparent; margin-top: 2px; }
.tag-pool-empty { font-size: 13px; color: var(--ink-soft); opacity: .6; }
.selected-tags { display: flex; flex-wrap: wrap; gap: 5px; min-height: 24px; margin-top: 4px; }
.sel-empty { font-size: 12px; color: var(--ink-soft); opacity: .5; line-height: 24px; }
.sel-chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px 2px 10px; border-radius: 20px;
  font-size: 12.5px; background: var(--accent); color: #fff;
}
.sel-chip b { cursor: pointer; font-weight: 400; font-size: 14px; opacity: .7; line-height: 1; }
.sel-chip b:hover { opacity: 1; }

/* ---------- Markdown 语法速查面板 ---------- */
.md-help .md-ref { padding: 12px 14px; max-height: calc(100vh - 170px); overflow: auto; }
.md-row { display: flex; flex-direction: column; gap: 3px; padding: 9px 0; border-bottom: 1px dashed var(--line); }
.md-row:last-child { border-bottom: none; }
.md-row code {
  align-self: flex-start;
  background: #f1e6d8; color: var(--accent-dark);
  padding: 3px 8px; border-radius: 6px; font-size: 13px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  white-space: nowrap;
}
.md-row p { margin: 0; font-size: 13px; color: var(--ink-soft); line-height: 1.5; }
.md-group { margin: 14px 0 6px; font-weight: 700; font-size: 13px; color: var(--accent-dark); letter-spacing: .03em; }
.md-group:first-child { margin-top: 2px; }
.md-ref pre {
  align-self: flex-start; width: 100%; box-sizing: border-box;
  background: #f6efe4; border: 1px solid var(--line); border-radius: 8px;
  padding: 8px 10px; margin: 5px 0 2px; font-size: 12.5px; line-height: 1.45;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  white-space: pre-wrap; word-break: break-word; overflow-x: auto;
}
.md-ref .katex-block { margin: 6px 0; overflow-x: auto; }
.katex-block { overflow-x: auto; text-align: center; margin: 1em 0; }

/* 灯箱（点击图片放大，与详情页共用） */
.lightbox {
  position: fixed; inset: 0; z-index: 9999;
  display: none; align-items: center; justify-content: center;
  padding: 4vh 4vw;
  background: rgba(28, 22, 16, 0.92);
  backdrop-filter: blur(4px);
  cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox-inner { display: flex; flex-direction: column; align-items: center; gap: 10px; max-width: 92vw; max-height: 92vh; }
.lightbox-inner img {
  max-width: 92vw; max-height: 84vh; width: auto; height: auto;
  border-radius: 12px; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  cursor: default;
}
.lightbox-cap { color: #f3ebe0; font-size: 13px; opacity: 0.82; text-align: center; max-width: 90vw; }

/* 拖拽上传提示层 */
.editor { position: relative; }
.dropzone {
  position: absolute; inset: 0; z-index: 30;
  display: none; align-items: center; justify-content: center;
  background: rgba(251, 246, 239, 0.92);
  border: 2px dashed var(--accent); border-radius: var(--radius);
  font-size: 18px; font-weight: 600; color: var(--accent-dark);
  pointer-events: none;
}
.dropzone.show { display: flex; }

/* ---------- 弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(74,63,53,.35);
  display: none; align-items: center; justify-content: center; z-index: 20; padding: 20px;
}
.modal-mask.show { display: flex; }
.modal {
  background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 26px 28px; width: 100%; max-width: 360px;
}
.modal h3 { margin: 0 0 16px; }
.empty { padding: 40px 16px; text-align: center; color: var(--ink-soft); }