/* VN Tax Corpus v4 — CSDL VB Thuế VN — 3-column layout */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --P:#028a39;--PD:#016b2c;--PL:#e8f5ee;
  --txt:#1a1a1a;--muted:#666;--bdr:#e0e0e0;--bg:#f4f6f8;--W:#fff;
  --sh:0 2px 8px rgba(0,0,0,.09);
  --font:'Segoe UI',Arial,sans-serif;
  --sb-w:200px;--list-w:340px;
}
body{font-family:var(--font);font-size:16px;color:var(--txt);background:var(--bg);line-height:1.7}

/* Header */
header{background:linear-gradient(135deg,var(--PD),var(--P));color:#fff;padding:8px 16px 6px}
.header-inner{max-width:100%;margin:0 auto}
.header-top{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:10px;margin-bottom:6px}
header h1{font-size:1.1rem;margin-bottom:0}

.stats{display:flex;gap:10px}
.stat{text-align:center;background:rgba(255,255,255,.15);padding:6px 14px;border-radius:8px}
.stat strong{display:block;font-size:1.3rem;line-height:1.2}
.stat span{font-size:.72rem;opacity:.85}
.search-input{width:100%;padding:9px 14px;border-radius:8px;border:none;font-size:.95rem;outline:none;margin-bottom:8px;font-family:var(--font)}
.search-input:focus{box-shadow:0 0 0 3px rgba(255,255,255,.35)}
.search-hint{font-size:.75rem;opacity:.75;margin-top:-5px;margin-bottom:8px}

/* Inline filter bar (below search) */
.filter-bar{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.filter-bar .fd{position:relative}
.filter-bar .fd-btn{
  padding:5px 10px;border-radius:7px;border:1.5px solid rgba(255,255,255,.4);
  background:rgba(255,255,255,.15);color:#fff;font-size:.82rem;cursor:pointer;
  font-family:var(--font);white-space:nowrap;display:flex;align-items:center;gap:5px
}
.filter-bar .fd-btn:hover,.filter-bar .fd-btn.active{background:rgba(255,255,255,.3);border-color:rgba(255,255,255,.7)}
.fd-badge{background:#fff;color:var(--P);border-radius:8px;padding:1px 6px;font-size:.72rem;font-weight:700}
.fd-panel{
  position:absolute;top:calc(100% + 6px);left:0;z-index:200;min-width:190px;
  background:#fff;border:1px solid var(--bdr);border-radius:10px;
  box-shadow:0 6px 24px rgba(0,0,0,.13);padding:9px 11px;display:none
}
.fd-panel.open{display:block}
.fd-panel label{display:flex;align-items:center;gap:7px;padding:3px 0;font-size:.85rem;cursor:pointer;color:var(--txt)}
.fd-panel label:hover{color:var(--P)}
.fd-panel input[type=checkbox]{accent-color:var(--P);width:14px;height:14px}
.fd-panel .clear-lnk{display:block;margin-top:5px;font-size:.78rem;color:var(--muted);text-decoration:none;text-align:right}
.fd-panel .clear-lnk:hover{color:#c00}
.fd-panel select{width:100%;padding:6px 8px;border-radius:6px;border:1px solid var(--bdr);font-size:.87rem;font-family:var(--font)}
.fd-hl{display:flex;align-items:center;gap:7px;padding:4px 8px;border-radius:7px;border:1.5px solid rgba(255,255,255,.4);background:rgba(255,255,255,.15);color:#fff;font-size:.82rem;cursor:pointer}
.fd-hl input{accent-color:#fff;width:14px;height:14px}
.btn-reset-hdr{padding:5px 10px;border-radius:7px;border:1.5px solid rgba(255,255,255,.4);background:transparent;color:rgba(255,255,255,.8);font-size:.82rem;cursor:pointer;font-family:var(--font)}
.btn-reset-hdr:hover{background:rgba(255,255,255,.2);color:#fff}

/* ── 3-COLUMN LAYOUT ── */
.layout{display:flex;height:calc(100vh - var(--header-h, 160px));overflow:hidden;gap:0}

/* Sidebar */
.sidebar{
  width:var(--sb-w);flex-shrink:0;background:var(--W);
  border-right:1px solid var(--bdr);
  overflow-y:auto;padding:10px 8px;
}
.sidebar-hd{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--P);padding:4px 4px 4px;border-bottom:1px solid var(--bdr);margin-bottom:4px}

/* Nav L1 */
.nav-section{margin-bottom:3px}
.nav-s-btn{width:100%;display:flex;justify-content:space-between;align-items:center;padding:6px 8px;border:none;border-radius:6px;background:var(--PL);color:var(--PD);font-size:.8rem;font-weight:700;cursor:pointer;text-align:left;font-family:var(--font)}
.nav-s-btn em{background:var(--P);color:#fff;padding:1px 6px;border-radius:10px;font-size:.68rem;font-style:normal;flex-shrink:0}
.nav-s-btn:hover,.nav-s-btn.open{background:var(--P);color:#fff}
.nav-s-btn.open em{background:rgba(255,255,255,.25)}
.nav-cat-list{list-style:none;padding:3px 0 3px 4px}

/* Nav L2 */
.nav-l2-item{margin-bottom:2px}
.nav-l2-btn{width:100%;display:flex;justify-content:space-between;align-items:center;padding:4px 6px;border:none;border-radius:4px;background:#f5f5f5;color:var(--txt);font-size:.76rem;cursor:pointer;text-align:left;font-family:var(--font)}
.nav-l2-btn em{color:var(--muted);font-size:.7rem;font-style:normal}
.nav-l2-btn:hover{background:var(--PL);color:var(--PD)}
.nav-l2{display:flex;justify-content:space-between;padding:4px 6px;border-radius:4px;color:var(--muted);text-decoration:none;font-size:.76rem}
.nav-l2:hover,.nav-l2.nav-active{background:var(--PL);color:var(--PD)}
.nav-l2 em{font-size:.7rem;font-style:normal}

/* Nav L3 */
.nav-l3-list{list-style:none;padding:2px 0 2px 8px}
.nav-l3{display:flex;justify-content:space-between;padding:3px 6px;border-radius:4px;color:var(--muted);text-decoration:none;font-size:.73rem}
.nav-l3:hover,.nav-l3.nav-active{background:#f0faf4;color:var(--P)}
.nav-l3 em{font-size:.68rem;font-style:normal}

/* ── DOC LIST PANEL ── */
.doc-panel{
  width:var(--list-w);flex-shrink:0;
  border-right:1px solid var(--bdr);
  display:flex;flex-direction:column;
  background:var(--bg);overflow:hidden;
}
.doc-panel-top{padding:10px 12px 6px;background:var(--W);border-bottom:1px solid var(--bdr)}
.result-info{font-size:.8rem;color:var(--muted)}
.doc-list{flex:1;overflow-y:auto;padding:8px 10px;display:flex;flex-direction:column;gap:5px}
.di{
  background:var(--W);border:1px solid var(--bdr);border-radius:8px;padding:9px 12px;
  cursor:pointer;transition:box-shadow .12s,border-color .12s;
}
.di:hover{box-shadow:var(--sh);border-color:var(--P)}
.di.active{border-color:var(--P);background:var(--PL);box-shadow:var(--sh)}
.di-name{font-size:.85rem;color:var(--PD);font-weight:600;display:block;margin-bottom:5px;line-height:1.35}
.di.active .di-name{color:var(--PD)}
.di-tags{display:flex;flex-wrap:wrap;gap:4px;align-items:center}
.b-type{font-size:.7rem;background:#f0f0f0;color:#444;padding:1px 6px;border-radius:8px}
.b-yr{font-size:.7rem;background:#eff6ff;color:#1d4ed8;padding:1px 6px;border-radius:8px;font-weight:700}
.b-tax{font-size:.7rem;padding:1px 6px;border-radius:8px;border:1.5px solid;font-weight:600}
.b-hl{font-size:.68rem;background:#d1fae5;color:#065f46;padding:1px 6px;border-radius:8px}
.b-het{font-size:.68rem;background:#fee2e2;color:#991b1b;padding:1px 6px;border-radius:8px}
.b-match{font-size:.68rem;background:#fef3c7;color:#92400e;padding:1px 6px;border-radius:8px}
.loading,.empty{text-align:center;padding:32px;color:var(--muted);font-style:italic;font-size:.9rem}

/* Pagination */
.pagination{display:flex;justify-content:center;gap:4px;padding:8px 10px;flex-wrap:wrap;background:var(--W);border-top:1px solid var(--bdr)}
.pgb{padding:5px 10px;border:1px solid var(--bdr);border-radius:5px;background:#fff;cursor:pointer;font-size:.8rem;font-family:var(--font)}
.pgb:hover{background:var(--PL);border-color:var(--P)}
.pgb.on{background:var(--P);color:#fff;border-color:var(--P)}
.pgdot{padding:5px 3px;color:var(--muted);font-size:.8rem}

/* ── PREVIEW PANEL ── */
.preview-panel{
  flex:1;min-width:0;
  display:flex;flex-direction:column;
  background:#fff;overflow:hidden;
}
.preview-toolbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:8px 14px;background:var(--P);color:#fff;
  font-size:.83rem;flex-shrink:0;gap:10px;
}
.preview-toolbar .doc-title-bar{
  flex:1;min-width:0;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  font-weight:600;
}
.preview-toolbar a{
  color:#fff;text-decoration:none;border:1px solid rgba(255,255,255,.5);
  padding:3px 10px;border-radius:5px;font-size:.78rem;white-space:nowrap;
  flex-shrink:0;
}
.preview-toolbar a:hover{background:rgba(255,255,255,.2)}
.preview-empty{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:var(--muted);gap:12px;padding:40px;text-align:center;
}
.preview-empty .big-icon{font-size:3rem}
.preview-frame{flex:1;border:none;width:100%;height:100%}

/* Search loading */
.search-status{font-size:.78rem;color:rgba(255,255,255,.8);margin-top:4px}

/* ── Doc content pages ─────────────────────────────────────────────────── */
.nav-bar{background:var(--P);padding:10px 24px}
.nav-bar a{color:#fff;text-decoration:none;font-size:.95rem}
.nav-bar a:hover{text-decoration:underline}
.doc-content,.doc-content *{font-family:'Segoe UI',Arial,sans-serif !important;}
.doc-content{max-width:900px;margin:28px auto;padding:0 28px 48px;font-size:18px;line-height:1.85;}
.doc-title{color:var(--PD);font-size:1.45rem;border-bottom:2px solid var(--P);padding-bottom:12px;margin-bottom:22px;font-family:var(--font)!important}
.doc-content p{margin-bottom:13px;text-align:justify}
.doc-content table{width:100%;border-collapse:collapse;margin:16px 0;font-size:1rem;display:block;overflow-x:auto}
.doc-content th{background:var(--P);color:#fff;padding:9px 13px;text-align:left}
.doc-content td{padding:8px 13px;border:1px solid var(--bdr)}
.doc-content tr:nth-child(even) td{background:var(--PL)}
.doc-content h1,.doc-content h2,.doc-content h3{color:var(--PD);margin:20px 0 10px}
.doc-content ul,.doc-content ol{padding-left:26px;margin-bottom:13px}
.doc-content span[style*="font-weight:bold"]{font-weight:normal!important}
.empty-doc{background:#fff8e1;border:1px solid #ffe082;border-radius:8px;padding:20px;color:#7b5e00;font-size:.95rem;line-height:1.6;margin:20px 0}




/* Resizable panels */
.resizer{
  width:5px;flex-shrink:0;cursor:col-resize;background:transparent;
  border-right:1px solid var(--bdr);transition:background .15s;position:relative;z-index:10;
}
.resizer:hover,.resizer.dragging{background:var(--P)}

/* Compact header */
.header-title{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.header-title h1{font-size:1.1rem;margin:0}
.stat-inline{font-size:.78rem;color:var(--muted);white-space:nowrap}

/* Compact footer */
footer{padding:6px 16px;font-size:.7rem;color:#999;text-align:center;border-top:1px solid var(--bdr);background:var(--W)}
footer p{margin:0}

@media(max-width:900px){
  .layout{flex-direction:column;height:auto;overflow:visible}
  .sidebar{width:100%;max-height:280px;border-right:none;border-bottom:1px solid var(--bdr)}
  .doc-panel{width:100%;border-right:none;border-bottom:1px solid var(--bdr)}
  .preview-panel{min-height:60vh}
  header h1{font-size:1.2rem}
  .stats{display:none}
}