/* ================================================================
   XML VALIDATOR & FORMATTER — COMPLETE STYLESHEET
   ================================================================ */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --p:#8B5CF6;--pd:#7C3AED;--pl:#C4B5FD;--pg:rgba(139,92,246,.28);
  --a:#06B6D4;--ag:rgba(6,182,212,.22);
  --s:#10B981;--sg:rgba(16,185,129,.22);
  --w:#F59E0B;--wg:rgba(245,158,11,.18);
  --e:#EF4444;--eg:rgba(239,68,68,.18);
  --pk:#EC4899;
  --bg:#060611;--bg2:#0B0B1D;--bg3:#101028;--bg4:#171740;--bg5:#202052;
  --bd:rgba(139,92,246,.12);--bdh:rgba(139,92,246,.35);
  --t1:#F5F3FF;--t2:#C4B5FD;--t3:#7B799C;
  --r:14px;--rm:10px;--rs:7px;--rx:4px;
  --tr:.2s cubic-bezier(.4,0,.2,1);
  --f:'Segoe UI',system-ui,-apple-system,sans-serif;
  --mono:'Consolas','Fira Code','Courier New',monospace;
}
html,body{width:100%;height:100%;overflow:hidden;font-family:var(--f);background:var(--bg);color:var(--t1);line-height:1.5;-webkit-font-smoothing:antialiased}

/* AMBIENT */
.amb{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.amb b{position:absolute;border-radius:50%;filter:blur(120px);opacity:.08;animation:dr 30s ease-in-out infinite alternate}
.amb b:nth-child(1){width:500px;height:500px;background:var(--p);top:-90px;left:-50px}
.amb b:nth-child(2){width:420px;height:420px;background:var(--a);bottom:-80px;right:-30px;animation-delay:-10s}
.amb b:nth-child(3){width:280px;height:280px;background:var(--pk);top:42%;left:56%;animation-delay:-18s}
@keyframes dr{0%{transform:translate(0,0) scale(1)}50%{transform:translate(40px,-50px) scale(1.05)}100%{transform:translate(-30px,30px) scale(.96)}}

.shell{position:relative;z-index:1;width:100%;height:100%;display:flex;flex-direction:column;overflow:hidden}

/* HEADER */
.hdr{display:flex;align-items:center;justify-content:space-between;padding:0 20px;height:52px;background:rgba(11,11,29,.9);backdrop-filter:blur(22px);border-bottom:1px solid var(--bd);flex-shrink:0}
.logo{display:flex;align-items:center;gap:9px}
.logo-ic{width:34px;height:34px;background:linear-gradient(135deg,var(--p),var(--a));border-radius:var(--rs);display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800;color:#fff;box-shadow:0 3px 14px var(--pg)}
.logo-t{font-size:16px;font-weight:700}
.logo-t em{font-style:normal;background:linear-gradient(135deg,var(--pl),var(--a));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hdr-c{display:flex;gap:4px;align-items:center}
.hdr-r{display:flex;gap:6px;align-items:center}

/* STATUS */
.status-pill{padding:5px 14px;border-radius:50px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:5px;transition:var(--tr)}
.status-pill.valid{background:rgba(16,185,129,.1);border:1px solid rgba(16,185,129,.25);color:var(--s)}
.status-pill.invalid{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.25);color:var(--e)}
.status-pill.empty{background:var(--bg4);border:1px solid var(--bd);color:var(--t3)}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:7px 14px;border:none;border-radius:var(--rs);font-size:12px;font-weight:600;cursor:pointer;transition:var(--tr);font-family:var(--f);white-space:nowrap}
.btn-p{background:linear-gradient(135deg,var(--p),var(--pd));color:#fff;box-shadow:0 3px 12px var(--pg)}
.btn-p:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 6px 20px var(--pg)}
.btn-s{background:linear-gradient(135deg,var(--s),#059669);color:#fff}
.btn-s:hover:not(:disabled){transform:translateY(-1px)}
.btn-o{background:transparent;border:1px solid var(--bd);color:var(--t2)}
.btn-o:hover{border-color:var(--p);background:rgba(139,92,246,.06);color:#fff}
.btn:disabled{opacity:.3;cursor:not-allowed;transform:none!important}

/* MAIN */
.main{flex:1;display:flex;overflow:hidden;position:relative}

/* PANELS */
.panel{display:flex;flex-direction:column;overflow:hidden;min-width:0}
.panel-in{flex:1;width:50%}
.panel-out{flex:1;width:50%;border-left:1px solid var(--bd)}

.p-hd{display:flex;align-items:center;justify-content:space-between;padding:6px 14px;height:38px;background:rgba(11,11,29,.5);border-bottom:1px solid var(--bd);flex-shrink:0}
.p-hd-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.7px;color:var(--t3);display:flex;align-items:center;gap:5px}
.p-hd-title i{font-style:normal;font-size:12px}
.p-hd-r{display:flex;gap:4px;align-items:center}
.p-hd .btn{padding:4px 10px;font-size:10px}

/* EDITOR */
.editor-wrap{flex:1;position:relative;overflow:hidden;display:flex}
.line-nums{width:44px;padding:12px 0;background:rgba(11,11,29,.4);border-right:1px solid var(--bd);overflow:hidden;flex-shrink:0;text-align:right;user-select:none}
.line-nums div{padding:0 8px;font-family:var(--mono);font-size:13px;line-height:1.65;color:var(--t3);height:21.45px}
.line-nums div.err-line{color:var(--e);font-weight:700;background:rgba(239,68,68,.08)}
.editor-area{flex:1;position:relative;overflow:auto}
.editor-area::-webkit-scrollbar{width:8px;height:8px}
.editor-area::-webkit-scrollbar-thumb{background:var(--bd);border-radius:4px}
.editor-area::-webkit-scrollbar-corner{background:transparent}

.code-input{width:100%;height:100%;padding:12px 14px;background:transparent;border:none;color:var(--t1);font-family:var(--mono);font-size:13px;line-height:1.65;outline:none;resize:none;tab-size:2;-moz-tab-size:2;white-space:pre;overflow:auto;position:absolute;inset:0;z-index:2;caret-color:var(--a)}
.code-input::placeholder{color:var(--t3)}

/* ERROR BAR */
.err-bar{padding:10px 14px;background:rgba(239,68,68,.06);border-top:1px solid rgba(239,68,68,.15);flex-shrink:0;display:none;max-height:100px;overflow-y:auto;font-size:12px;color:var(--e);font-family:var(--mono);line-height:1.5}
.err-bar.on{display:block}
.err-bar .err-msg{display:flex;gap:6px;align-items:flex-start}
.err-bar .err-ico{flex-shrink:0}

/* OUTPUT TABS */
.out-tabs{display:flex;gap:2px;padding:0 14px;background:rgba(11,11,29,.3);border-bottom:1px solid var(--bd);flex-shrink:0;align-items:center;height:36px}
.o-tab{padding:5px 13px;border:none;border-radius:50px;font-size:11px;font-weight:600;cursor:pointer;transition:var(--tr);font-family:var(--f);background:transparent;color:var(--t3)}
.o-tab.on{background:var(--bg5);color:var(--t1)}
.o-tab:hover:not(.on){color:var(--t2)}

/* OUTPUT AREA */
.out-area{flex:1;overflow:auto;padding:12px 14px;font-family:var(--mono);font-size:13px;line-height:1.65}
.out-area::-webkit-scrollbar{width:8px;height:8px}
.out-area::-webkit-scrollbar-thumb{background:var(--bd);border-radius:4px}

/* XML SYNTAX COLORS */
.x-tag{color:#EC4899}
.x-attr{color:#60A5FA}
.x-aval{color:#34D399}
.x-text{color:#E5E7EB}
.x-comment{color:#6B7280;font-style:italic}
.x-cdata{color:#FBBF24}
.x-pi{color:#A78BFA}
.x-brk{color:var(--t3)}

/* TREE */
.tree{padding:4px 0}
.tree-node{padding-left:18px;position:relative}
.tree-node.root{padding-left:0}
.tree-row{display:flex;align-items:flex-start;padding:2px 0;gap:4px;cursor:default;border-radius:var(--rx);transition:background .1s;flex-wrap:wrap}
.tree-row:hover{background:rgba(139,92,246,.04)}
.tree-toggle{width:18px;height:18px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:10px;color:var(--t3);flex-shrink:0;border-radius:3px;transition:var(--tr);margin-top:1px;background:transparent;border:none;font-family:var(--f)}
.tree-toggle:hover{background:var(--bg5);color:var(--t1)}
.tree-toggle.collapsed{transform:rotate(-90deg)}
.tree-tag{color:#EC4899;font-weight:700;font-size:13px;flex-shrink:0}
.tree-attrs{display:flex;flex-wrap:wrap;gap:3px;align-items:center}
.x-attr-chip{padding:1px 7px;border-radius:4px;font-size:10px;background:var(--bg4);border:1px solid var(--bd);color:#60A5FA;font-family:var(--mono);line-height:1.4}
.x-attr-chip .av{color:#34D399}
.tree-count{font-size:10px;color:var(--t3);margin-left:4px;font-family:var(--f);font-weight:400}
.tree-text-val{font-size:12px;color:#E5E7EB;word-break:break-all;max-width:70%}
.tree-comment-val{font-size:12px;color:#6B7280;font-style:italic;word-break:break-all;max-width:70%}
.tree-cdata-val{font-size:12px;color:#FBBF24;word-break:break-all;max-width:70%}
.tree-pi-val{font-size:12px;color:#A78BFA;word-break:break-all;max-width:70%}
.tree-type-ico{font-size:11px;flex-shrink:0;margin-top:2px}
.tree-children{overflow:hidden;transition:max-height .2s ease}
.tree-children.collapsed{max-height:0!important;overflow:hidden}
.tree-path-tip{position:fixed;padding:4px 10px;background:var(--bg3);border:1px solid var(--bd);border-radius:var(--rx);font-size:10px;color:var(--a);z-index:999;pointer-events:none;display:none;box-shadow:0 4px 12px rgba(0,0,0,.4);font-family:var(--mono)}

/* STATS */
.info-panel{padding:14px;overflow-y:auto;flex:1}
.info-card{background:var(--bg3);border:1px solid var(--bd);border-radius:var(--rm);padding:14px;margin-bottom:10px}
.info-title{font-size:12px;font-weight:700;color:var(--t2);margin-bottom:8px;display:flex;align-items:center;gap:6px}
.info-row{display:flex;justify-content:space-between;padding:4px 0;border-bottom:1px solid rgba(139,92,246,.05);font-size:12px}
.info-row:last-child{border-bottom:none}
.info-label{color:var(--t3)}
.info-val{color:var(--t1);font-weight:600;font-variant-numeric:tabular-nums;word-break:break-all;max-width:60%;text-align:right}
.ns-list{font-size:11px;color:var(--t3);font-family:var(--mono);line-height:1.7;margin-top:4px;word-break:break-all}
.ns-item{padding:2px 0}

/* STATS BAR */
.stats-bar{display:flex;gap:10px;padding:6px 14px;border-top:1px solid var(--bd);flex-shrink:0;flex-wrap:wrap;align-items:center;background:rgba(11,11,29,.4);font-size:10px;color:var(--t3)}
.stats-bar span{display:flex;align-items:center;gap:3px}
.stats-bar strong{color:var(--t2)}

/* FOOTER */
.ftr{display:flex;align-items:center;justify-content:space-between;padding:0 20px;height:28px;background:rgba(11,11,29,.85);backdrop-filter:blur(12px);border-top:1px solid var(--bd);flex-shrink:0;font-size:10px;color:var(--t3)}

/* TOASTS */
.toast-box{position:fixed;top:12px;right:12px;z-index:10000;display:flex;flex-direction:column;gap:6px;pointer-events:none}
.tst{padding:10px 15px;background:var(--bg3);border:1px solid var(--bd);border-radius:var(--rm);backdrop-filter:blur(18px);box-shadow:0 10px 40px rgba(0,0,0,.45);display:flex;align-items:center;gap:8px;font-size:12px;font-weight:500;animation:tI .3s ease;max-width:360px;pointer-events:auto}
.tst.ok{border-left:3px solid var(--s)}.tst.er{border-left:3px solid var(--e)}.tst.wn{border-left:3px solid var(--w)}.tst.in{border-left:3px solid var(--p)}
.tst.out{animation:tO .25s ease forwards}
@keyframes tI{from{transform:translateX(110%);opacity:0}to{transform:translateX(0);opacity:1}}
@keyframes tO{from{transform:translateX(0);opacity:1}to{transform:translateX(110%);opacity:0}}

/* RESPONSIVE */
@media(max-width:800px){
  .main{flex-direction:column}
  .panel-in,.panel-out{width:100%;flex:none;height:50%}
  .panel-out{border-left:none;border-top:1px solid var(--bd)}
  .hdr{padding:0 12px;height:46px;flex-wrap:wrap;gap:4px}
  .hdr-c{order:3;width:100%;justify-content:center;padding-bottom:4px}
  .logo-t{font-size:14px}
}