:root{
  --bg:#f4f6f8; --panel:#ffffff; --ink:#1d2733; --muted:#697586; --line:#dce1e7;
  --brand:#1f4e79; --brand-2:#2f6da3;
  --wanted:#1e7d43; --wanted-bg:#e6f4ea;
  --not:#b23b3b; --not-bg:#fbeaea;
  --review:#b7791f; --review-bg:#fdf4e3;
  --dep:#8250df; --dep-bg:#f3ecff;
  --radius:8px; --shadow:0 1px 3px rgba(16,24,40,.08),0 1px 2px rgba(16,24,40,.06);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font:14px/1.5 "Segoe UI",system-ui,Arial,sans-serif;color:var(--ink);background:var(--bg)}
button{font:inherit;cursor:pointer}
.hidden{display:none!important}

/* ---- top bar ---- */
header.top{display:flex;align-items:center;gap:16px;padding:10px 18px;background:var(--brand);color:#fff;box-shadow:var(--shadow);position:sticky;top:0;z-index:20}
header.top h1{font-size:16px;margin:0;font-weight:600;letter-spacing:.2px}
header.top .sub{font-size:12px;opacity:.8}
header.top .spacer{flex:1}
.counts{display:flex;gap:8px}
.count-pill{background:rgba(255,255,255,.14);border-radius:20px;padding:3px 11px;font-size:12px;font-weight:600;display:flex;align-items:center;gap:6px}
.count-pill .dot{width:8px;height:8px;border-radius:50%}
.dot.wanted{background:#7ee2a1}.dot.not{background:#ff9a9a}.dot.review{background:#ffd583}
.btn{border:0;border-radius:var(--radius);padding:8px 14px;font-weight:600;background:#fff;color:var(--brand)}
.btn.ghost{background:rgba(255,255,255,.16);color:#fff}
.btn.primary{background:#ffd24a;color:#3a2f00}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* ---- layout ---- */
.app{display:grid;grid-template-columns:minmax(320px,420px) 1fr;gap:0;height:calc(100vh - 55px)}
.sidebar{background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0}
.main{overflow:auto;padding:22px 26px}

/* ---- sidebar controls ---- */
.controls{padding:12px 14px;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:10px}
.search{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:var(--radius);font:inherit}
.filter-row{display:flex;gap:6px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:#fff;border-radius:20px;padding:4px 10px;font-size:12px;color:var(--muted)}
.chip.active{border-color:var(--brand);color:var(--brand);background:#eef4fa;font-weight:600}
.tools{display:flex;gap:6px;flex-wrap:wrap}
.tool-btn{border:1px solid var(--line);background:#fff;border-radius:var(--radius);padding:6px 10px;font-size:12px;color:var(--ink)}

/* ---- tree ---- */
.tree{overflow:auto;flex:1;min-height:0;padding:6px 6px 40px}
.grp{margin:2px 0}
.grp>.grp-h{display:flex;align-items:center;gap:6px;padding:5px 8px;border-radius:6px;cursor:pointer;font-weight:600}
.grp>.grp-h:hover{background:#f0f3f6}
.grp-h .caret{width:12px;color:var(--muted);transition:transform .15s}
.grp.collapsed .caret{transform:rotate(-90deg)}
.grp.collapsed>.grp-children{display:none}
.grp-children{margin-left:14px;border-left:1px solid var(--line);padding-left:6px}
.grp .mini{font-size:11px;color:var(--muted);font-weight:500}
.l2{font-size:13px}.l3{font-size:12.5px}.l4{font-size:12px;color:var(--muted)}
.clause-item{display:flex;align-items:center;gap:8px;padding:5px 8px;border-radius:6px;cursor:pointer}
.clause-item:hover{background:#f0f3f6}
.clause-item.selected{background:#e7f0f9;outline:1px solid var(--brand-2)}
.clause-item .art{font-weight:600;font-size:12px;white-space:nowrap}
.clause-item .ct{font-size:12px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.status-dot{width:10px;height:10px;border-radius:50%;flex:none;border:1px solid rgba(0,0,0,.12)}
.status-dot.wanted{background:var(--wanted)}
.status-dot.not{background:var(--not)}
.status-dot.review{background:var(--review)}
.badge-dep{font-size:10px;background:var(--dep-bg);color:var(--dep);border-radius:10px;padding:0 6px;font-weight:700}

/* ---- main / clause detail ---- */
.crumbs{font-size:12px;color:var(--muted);margin-bottom:6px}
.clause-head{display:flex;align-items:flex-start;gap:14px;flex-wrap:wrap}
.clause-head h2{margin:0;font-size:20px}
.clause-head .num{color:var(--brand);font-weight:700}
.statusbar{display:flex;gap:8px;margin:16px 0}
.sbtn{border:1px solid var(--line);background:#fff;border-radius:var(--radius);padding:8px 14px;font-weight:600;display:flex;align-items:center;gap:7px}
.sbtn .d{width:10px;height:10px;border-radius:50%}
.sbtn.wanted.on{background:var(--wanted-bg);border-color:var(--wanted);color:var(--wanted)}
.sbtn.not.on{background:var(--not-bg);border-color:var(--not);color:var(--not)}
.sbtn.review.on{background:var(--review-bg);border-color:var(--review);color:var(--review)}
.suggestion{margin:10px 0;padding:8px 12px;border-radius:var(--radius);background:#eef4fa;color:var(--brand);font-size:13px}
.clause-text{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;white-space:pre-wrap;box-shadow:var(--shadow);margin-top:8px}
.rel{margin-top:18px}
.rel h3{font-size:13px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted);margin:0 0 8px}
.reflist{display:flex;flex-wrap:wrap;gap:6px}
.reflink{border:1px solid var(--line);background:#fff;border-radius:16px;padding:4px 11px;font-size:12px;color:var(--brand);cursor:pointer}
.reflink:hover{background:#eef4fa}
.reflink .warn{color:var(--not);font-weight:700;margin-left:4px}
.empty{color:var(--muted);padding:60px 0;text-align:center}

/* ---- modal ---- */
.overlay{position:fixed;inset:0;background:rgba(16,24,40,.45);display:flex;align-items:center;justify-content:center;z-index:40;padding:20px}
.modal{background:#fff;border-radius:12px;max-width:640px;width:100%;max-height:90vh;overflow:auto;box-shadow:0 20px 40px rgba(0,0,0,.25)}
.modal .mh{display:flex;align-items:center;padding:16px 20px;border-bottom:1px solid var(--line)}
.modal .mh h2{margin:0;font-size:17px}
.modal .mb{padding:18px 20px}
.modal .mf{padding:14px 20px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:8px}
.field{margin-bottom:14px}
.field>label{display:block;font-weight:600;margin-bottom:6px;font-size:13px}
.field select,.field input[type=number]{width:100%;padding:8px;border:1px solid var(--line);border-radius:6px;font:inherit}
.occ-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:6px}
.occ-grid label{display:flex;align-items:center;gap:6px;font-size:12px;font-weight:500;border:1px solid var(--line);border-radius:6px;padding:6px 8px;cursor:pointer}
.occ-grid label.on{border-color:var(--brand);background:#eef4fa}
.toggle{display:flex;gap:6px}
.toggle button{border:1px solid var(--line);background:#fff;border-radius:6px;padding:6px 14px;font-weight:600;color:var(--muted)}
.toggle button.on{border-color:var(--brand);background:#eef4fa;color:var(--brand)}
.note{font-size:12px;color:var(--muted);background:#fbf7ea;border:1px solid #efe4c2;border-radius:6px;padding:8px 10px}
.x{margin-left:auto;border:0;background:none;font-size:20px;color:var(--muted)}