/* 法律考研导图 —— 学术书卷风格
   墨黑 + 宣纸米 + 朱砂红，克制的衬线标题 */
:root{
  --ink:#1c1a17;
  --paper:#f6f2e9;
  --paper-2:#fffdf7;
  --line:#d9d1bf;
  --seal:#a8322a;        /* 朱砂印泥红 */
  --seal-2:#c14a3f;
  --muted:#8a8172;
  --ok:#3f7d4e;
  --off:#a8322a;
  --shadow:0 1px 2px rgba(28,26,23,.06),0 8px 24px rgba(28,26,23,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;
  color:var(--ink); background:var(--paper);
  -webkit-text-size-adjust:100%;
}
h1{font-family:Georgia,"Songti SC","SimSun",serif;font-weight:700;letter-spacing:.02em;margin:.2em 0 .8em}
h2{font-family:Georgia,"Songti SC",serif;font-size:1.05rem;margin:0 0 .8em;
   padding-left:.5em;border-left:3px solid var(--seal)}
code{font-family:ui-monospace,Menlo,Consolas,monospace;background:#efe9db;padding:.05em .35em;border-radius:4px;font-size:.85em}
a{color:inherit;text-decoration:none}

/* ---------- 登录/管理登录 ---------- */
.auth-bg{min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(1200px 600px at 50% -10%,#efe7d5,var(--paper));padding:24px}
.auth-card{width:100%;max-width:360px;background:var(--paper-2);border:1px solid var(--line);
  border-radius:16px;padding:32px 28px;box-shadow:var(--shadow)}
.auth-card .brand{font-family:Georgia,"Songti SC",serif;font-size:1.5rem;font-weight:700}
.auth-card.admin .brand::after{content:" ▪";color:var(--seal)}
.auth-card .sub{color:var(--muted);margin:.3em 0 1.4em;font-size:.9rem}
label{display:block;font-size:.8rem;color:var(--muted);margin:.9em 0 .3em}
input,select{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:9px;
  background:#fff;font-size:16px;color:var(--ink)}
input:focus,select:focus{outline:2px solid var(--seal-2);outline-offset:0;border-color:transparent}
button{cursor:pointer;font-size:15px;font-weight:600;border:none;border-radius:9px;
  background:var(--ink);color:#fbf7ee;padding:12px 16px;margin-top:16px;width:100%}
button:hover{background:#000}
.hint{font-size:.78rem;color:var(--muted);margin-top:16px;line-height:1.5}
.err{background:#fbe9e7;color:#8f2019;border:1px solid #eecac5;padding:10px 12px;border-radius:9px;
  font-size:.85rem;margin:.6em 0}

/* ---------- 顶栏 ---------- */
.top{display:flex;align-items:center;justify-content:space-between;
  padding:14px 20px;background:var(--paper-2);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.brand-sm{font-family:Georgia,"Songti SC",serif;font-weight:700}
.who{font-size:.88rem;color:var(--muted)}
.logout,.back{color:var(--seal);font-weight:600;margin-left:12px}
.wrap{max-width:920px;margin:0 auto;padding:24px 20px 80px}

/* ---------- 文档卡片 ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;margin-top:8px}
.card{display:block;background:var(--paper-2);border:1px solid var(--line);border-radius:14px;
  padding:20px;box-shadow:var(--shadow);transition:transform .12s,box-shadow .12s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--seal)}
.card:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(28,26,23,.12)}
.card-title{font-family:Georgia,"Songti SC",serif;font-size:1.15rem;font-weight:700;margin-bottom:6px}
.card-meta{color:var(--muted);font-size:.82rem}
.card-go{color:var(--seal);font-weight:600;font-size:.85rem;margin-top:14px}
.empty{background:var(--paper-2);border:1px dashed var(--line);border-radius:12px;padding:40px;text-align:center;color:var(--muted)}

/* ---------- 后台面板 ---------- */
.panel{background:var(--paper-2);border:1px solid var(--line);border-radius:14px;
  padding:20px;margin-bottom:20px;box-shadow:var(--shadow)}
.tbl{width:100%;border-collapse:collapse;font-size:.88rem}
.tbl th{text-align:left;color:var(--muted);font-weight:600;padding:8px 10px;border-bottom:2px solid var(--line)}
.tbl td{padding:9px 10px;border-bottom:1px solid #eee6d5}
.muted{color:var(--muted)} .ok{color:var(--ok);font-weight:600} .off{color:var(--off);font-weight:600}
.inline-form{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.inline-form input{width:auto;flex:1;min-width:120px;margin:0}
.inline-form button{width:auto;margin:0;padding:11px 20px}
.btn-sm{display:inline-block;font-size:.8rem;font-weight:600;padding:6px 12px;border-radius:7px;
  background:var(--ink);color:#fbf7ee;margin:2px 0}
.btn-sm.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn-sm.danger{background:var(--seal);color:#fff}

/* ---------- 水印 ---------- */
.watermark{position:fixed;inset:0;z-index:1;pointer-events:none;overflow:hidden;
  display:flex;flex-wrap:wrap;gap:60px 90px;transform:rotate(-24deg) scale(1.6);
  transform-origin:center;opacity:.06;font-size:13px;color:#000;
  align-content:flex-start;justify-content:center}
.watermark span{white-space:nowrap;font-weight:600}

@media (max-width:560px){
  .reader-top .tools input{width:110px}
  .wrap{padding:18px 14px 70px}
}


/* ================= 思维导图阅读器 v2 ================= */
.mm-body{margin:0;overflow:hidden;background:var(--paper);height:100vh;
  -webkit-user-select:none;user-select:none}
.mm-top{display:flex;align-items:center;gap:10px;padding:9px 16px;
  background:var(--paper-2);border-bottom:1px solid var(--line);
  position:relative;z-index:20;flex-wrap:wrap;height:auto}
.mm-top .doc-title{font-family:Georgia,"Songti SC",serif;font-weight:700;flex:1;min-width:90px}
.mm-top .tools{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.mm-top .tools input{width:140px;padding:7px 10px;margin:0;font-size:14px}
.mm-top .tools button{width:auto;margin:0;padding:7px 12px;font-size:13px;
  background:#efe9db;color:var(--ink);font-weight:600}
.mm-top .tools button:hover{background:var(--ink);color:#fbf7ee}
.mm-help{font-size:.72rem;color:var(--muted);margin-left:auto;white-space:nowrap}

.mm-stage{position:absolute;top:0;left:0;right:0;bottom:0;padding-top:52px;
  overflow:hidden;cursor:grab;z-index:2}
.mm-stage.grabbing{cursor:grabbing}
.mm-canvas{position:absolute;transform-origin:0 0;will-change:transform}
.mm-canvas svg{position:absolute;top:0;left:0;pointer-events:none;overflow:visible}
#nodes{position:absolute;top:0;left:0}

/* ★ 关键：横排文字。width:max-content 让盒子按内容自适应宽度，
   配合 max-width 才会在超长时正常换行，而不是被挤成竖排 */
.mm-node{position:absolute;box-sizing:border-box;
  width:max-content;max-width:300px;
  white-space:normal;word-break:break-word;writing-mode:horizontal-tb;
  display:flex;align-items:center;gap:5px;
  padding:7px 13px;background:#fffdf7;border:1.5px solid #cfc5b0;border-radius:9px;
  font-size:14px;line-height:1.5;cursor:pointer;
  box-shadow:0 1px 2px rgba(28,26,23,.05);
  transition:border-color .1s,box-shadow .1s}
.mm-node:hover{border-color:var(--seal);box-shadow:0 3px 10px rgba(28,26,23,.13);z-index:6}
.mm-node.sel{border-color:var(--seal);box-shadow:0 0 0 3px rgba(168,50,42,.18);z-index:7}
.mm-label{flex:1;min-width:0}
.mm-mark{flex:none;font-size:13px;line-height:1}

/* 加粗：保留原 XMind 的加粗 */
.mm-node.bold .mm-label{font-weight:700;color:#7d241d}

/* 层级 */
.mm-node.d0{background:var(--ink);color:#fbf7ee;border-color:var(--ink);
  font-family:Georgia,"Songti SC",serif;font-size:18px;font-weight:700;
  padding:11px 18px;border-radius:11px;max-width:260px}
.mm-node.d1{background:#f7ece9;border-color:var(--seal);border-width:2px;
  font-weight:700;font-size:15px;color:#7d241d;max-width:280px}
.mm-node.d2{border-color:#b5a88c;font-weight:600}
.mm-node.d4,.mm-node.d5{background:#faf7ef;border-color:#ddd4c0;font-size:13px;color:#4a463d}
.mm-node.hit{background:#ffe9a8;border-color:#d99a1f;box-shadow:0 0 0 3px rgba(217,154,31,.3)}

/* 展开钮 */
.mm-toggle{flex:none;margin-right:-7px;
  width:19px;height:19px;border-radius:50%;background:#fffdf7;
  border:1.5px solid var(--seal);color:var(--seal);
  font-size:12px;font-weight:700;line-height:16px;text-align:center;
  cursor:pointer;box-shadow:0 1px 2px rgba(0,0,0,.1)}
.mm-toggle:hover{background:var(--seal);color:#fff}
.mm-node.d0 .mm-toggle{background:var(--ink);border-color:#fbf7ee;color:#fbf7ee}

/* 有备注：左侧红条 */
.mm-node.has-note{border-left:4px solid var(--seal)}

.mm-pop{position:fixed;inset:0;background:rgba(28,26,23,.45);z-index:50;
  display:none;align-items:center;justify-content:center;padding:24px}
.mm-pop-card{background:var(--paper-2);border-radius:14px;padding:24px;max-width:560px;
  width:100%;max-height:70vh;overflow:auto;box-shadow:0 20px 50px rgba(0,0,0,.3)}
.mm-pop-card h3{font-family:Georgia,"Songti SC",serif;margin:0 0 12px;font-size:1.05rem}
.mm-pop-card pre{white-space:pre-wrap;font-family:inherit;font-size:.9rem;line-height:1.7;
  color:#4a463d;margin:0}
.mm-pop-x{margin-top:18px;width:auto;padding:9px 20px}

.loading{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  color:var(--muted);z-index:3}

@media (max-width:700px){
  .mm-help{display:none}
  .mm-top .tools input{width:100px}
  .mm-node{max-width:220px;font-size:13px;padding:6px 11px}
  .mm-node.d0{font-size:16px}
}
.keytbl{width:100%;border-collapse:collapse;font-size:.88rem}
.keytbl td{padding:7px 6px;border-bottom:1px solid #eee6d5}
.keytbl td:first-child{width:130px;white-space:nowrap}
kbd{display:inline-block;background:#efe9db;border:1px solid var(--line);border-bottom-width:2px;
  border-radius:5px;padding:2px 7px;font-family:ui-monospace,Menlo,monospace;font-size:.82em;font-weight:600}

/* ---------- 上传弹窗 / 文档卡片 / 编辑器 / 时间线 ---------- */
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.panel-head h2{margin:0}
.btn-add{width:auto;margin:0;padding:9px 16px;font-size:14px;background:var(--seal)}
.btn-add:hover{background:#8f2019}

.doc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.doc-card{border:1px solid var(--line);border-radius:12px;padding:16px;background:#fffdf7;
  border-left:4px solid var(--seal)}
.doc-card-title{font-family:Georgia,"Songti SC",serif;font-weight:700;font-size:1.05rem;margin-bottom:6px}
.doc-card-meta{color:var(--muted);font-size:.8rem;line-height:1.6;margin-bottom:12px}
.doc-card-acts{display:flex;gap:6px;flex-wrap:wrap}
.doc-card-acts .btn-sm{margin:0}
.doc-card-acts button.btn-sm{width:auto;padding:6px 12px;font-size:.8rem;margin:0}

.modal{position:fixed;inset:0;background:rgba(28,26,23,.5);z-index:60;
  display:none;align-items:center;justify-content:center;padding:20px}
.modal-card{background:var(--paper-2);border-radius:14px;padding:26px;max-width:460px;width:100%;
  max-height:88vh;overflow:auto;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.modal-card h3{font-family:Georgia,"Songti SC",serif;margin:0 0 8px;font-size:1.15rem}
.modal-card input[type=file]{padding:9px;background:#fff}
.btn-cancel{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn-cancel:hover{background:#efe9db;color:var(--ink)}
.okmsg{background:#e8f3ea;color:#2c5c39;border:1px solid #c3e0cb;padding:10px 14px;
  border-radius:9px;margin-bottom:16px;font-size:.9rem}
.danger-zone{border-color:#eecac5}
.danger-zone h2{border-left-color:var(--seal)}

/* 编辑器 */
.edit-tip{position:absolute;top:52px;left:0;right:0;z-index:15;
  background:#fff8e6;border-bottom:1px solid #ecd9a8;padding:7px 16px;
  font-size:.83rem;color:#7a6320}
.mm-body .edit-tip + .mm-stage{padding-top:86px}
.save-btn{background:var(--seal) !important;color:#fff !important}
.save-btn.urgent{animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.65}}
.ta{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:9px;
  font-family:inherit;font-size:15px;line-height:1.6;resize:vertical;background:#fff}
.ta:focus{outline:2px solid var(--seal-2);border-color:transparent}
.chip-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}
.chip{display:inline-flex;align-items:center;gap:5px;padding:7px 12px;border:1px solid var(--line);
  border-radius:20px;background:#fff;cursor:pointer;font-size:.88rem;user-select:none}
.chip:has(input:checked){background:#f7ece9;border-color:var(--seal);color:#7d241d;font-weight:600}
.chip input{width:auto;margin:0}

/* 时间线 */
.lib-head{display:flex;align-items:center;justify-content:space-between}
.lib-head h1{margin:.2em 0}
.timeline{position:relative;padding-left:22px}
.timeline::before{content:"";position:absolute;left:5px;top:6px;bottom:6px;width:2px;background:var(--line)}
.tl-item{position:relative;margin-bottom:20px}
.tl-dot{position:absolute;left:-22px;top:6px;width:12px;height:12px;border-radius:50%;
  background:var(--seal);border:2px solid var(--paper)}
.tl-body{background:#fffdf7;border:1px solid var(--line);border-radius:11px;padding:14px 16px}
.tl-head{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-bottom:6px}
.tag{background:var(--seal);color:#fff;border-radius:20px;padding:2px 9px;font-size:.72rem;font-weight:700}
.tl-sum{color:#4a463d;font-size:.92rem;line-height:1.6}
.tl-go{display:inline-block;margin-top:9px;color:var(--seal);font-weight:600;font-size:.85rem}