/* ================================================================
   KEYWORD DENSITY CHECKER — COMPLETE STYLESHEET
   ================================================================ */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --p:#7C3AED;--pd:#6D28D9;--pl:#A78BFA;--pg:rgba(124,58,237,.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;--pkg:rgba(236,72,153,.2);
  --bg:#060610;--bg2:#0B0B1C;--bg3:#111130;--bg4:#191942;--bg5:#222258;
  --bd:rgba(124,58,237,.12);--bdh:rgba(124,58,237,.35);
  --t1:#F5F3FF;--t2:#C4B5FD;--t3:#7C7A9C;
  --r:16px;--rm:11px;--rs:8px;--rx:5px;
  --tr:.22s cubic-bezier(.4,0,.2,1);
  --f:'Segoe UI',system-ui,-apple-system,sans-serif;
}
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:.09;animation:dr 28s ease-in-out infinite alternate}
.amb b:nth-child(1){width:520px;height:520px;background:var(--p);top:-100px;left:-60px}
.amb b:nth-child(2){width:440px;height:440px;background:var(--a);bottom:-90px;right:-40px;animation-delay:-9s}
.amb b:nth-child(3){width:300px;height:300px;background:var(--pk);top:40%;left:55%;animation-delay:-17s}
@keyframes dr{0%{transform:translate(0,0) scale(1)}33%{transform:translate(50px,-60px) scale(1.06)}66%{transform:translate(-40px,50px) scale(.94)}100%{transform:translate(35px,20px) scale(1.04)}}

/* SHELL */
.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:9px 24px;height:54px;background:rgba(11,11,28,.88);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);border-bottom:1px solid var(--bd);flex-shrink:0}
.logo{display:flex;align-items:center;gap:10px}
.logo-ic{width:38px;height:38px;background:linear-gradient(135deg,var(--p),var(--a));border-radius:var(--rs);display:flex;align-items:center;justify-content:center;font-size:18px;box-shadow:0 4px 16px var(--pg)}
.logo-t{font-size:17px;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-r{display:flex;gap:8px;align-items:center}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:9px 18px;border:none;border-radius:var(--rs);font-size:13px;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 4px 14px var(--pg)}
.btn-p:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 8px 22px var(--pg)}
.btn-s{background:linear-gradient(135deg,var(--s),#059669);color:#fff;box-shadow:0 4px 14px var(--sg)}
.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(124,58,237,.06);color:#fff}
.btn-sm{padding:7px 13px;font-size:12px}
.btn:disabled{opacity:.32;cursor:not-allowed;transform:none!important}

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

/* LEFT PANEL — INPUT */
.panel-l{width:42%;min-width:340px;display:flex;flex-direction:column;background:rgba(11,11,28,.5);border-right:1px solid var(--bd);flex-shrink:0;overflow:hidden}
.panel-l-head{padding:14px 18px;border-bottom:1px solid var(--bd);display:flex;align-items:center;justify-content:space-between;flex-shrink:0}
.panel-l-head h2{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--t2);display:flex;align-items:center;gap:6px}
.panel-l-head h2 i{font-style:normal}
.char-count{font-size:11px;color:var(--t3);font-weight:600;font-variant-numeric:tabular-nums}

.ta-wrap{flex:1;padding:0;overflow:hidden;display:flex;flex-direction:column}
.ta{width:100%;height:100%;padding:16px 18px;background:transparent;border:none;color:var(--t1);font-size:14px;font-family:var(--f);outline:none;resize:none;line-height:1.7;flex:1}
.ta::placeholder{color:var(--t3)}
.ta::-webkit-scrollbar{width:6px}
.ta::-webkit-scrollbar-thumb{background:var(--bd);border-radius:3px}

/* INPUT OPTIONS */
.opts-bar{padding:10px 18px;border-top:1px solid var(--bd);display:flex;gap:14px;align-items:center;flex-wrap:wrap;flex-shrink:0;background:rgba(11,11,28,.4)}
.opt{display:flex;align-items:center;gap:5px;font-size:11px;color:var(--t3)}
.opt label{cursor:pointer;user-select:none;display:flex;align-items:center;gap:5px;font-weight:600}
.opt select,.opt input[type=number]{padding:4px 8px;background:var(--bg4);border:1px solid var(--bd);border-radius:var(--rx);color:var(--t1);font-size:11px;font-family:var(--f);outline:none;cursor:pointer;width:auto}
.opt select option{background:var(--bg3)}
.opt input[type=number]{width:50px;text-align:center}
.opt input[type=checkbox]{-webkit-appearance:none;appearance:none;width:15px;height:15px;border:2px solid var(--bd);border-radius:3px;cursor:pointer;transition:var(--tr);position:relative;background:var(--bg4);flex-shrink:0}
.opt input[type=checkbox]:checked{background:var(--p);border-color:var(--p)}
.opt input[type=checkbox]:checked::after{content:'✓';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:#fff;font-size:9px;font-weight:700}

.action-bar{padding:10px 18px;border-top:1px solid var(--bd);display:flex;gap:8px;flex-shrink:0;background:rgba(11,11,28,.5)}

/* URL INPUT */
.url-row{padding:10px 18px;border-top:1px solid var(--bd);flex-shrink:0;background:rgba(11,11,28,.4)}
.url-in{width:100%;padding:8px 12px;background:var(--bg3);border:1px solid var(--bd);border-radius:var(--rs);color:var(--t1);font-size:12px;font-family:var(--f);outline:none;transition:var(--tr)}
.url-in:focus{border-color:var(--p);box-shadow:0 0 0 3px var(--pg)}
.url-in::placeholder{color:var(--t3)}
.url-help{font-size:10px;color:var(--t3);margin-top:5px;line-height:1.4}

/* RIGHT PANEL — RESULTS */
.panel-r{flex:1;display:flex;flex-direction:column;overflow:hidden}

/* STATS HEADER */
.stats-row{display:flex;gap:6px;padding:12px 18px;border-bottom:1px solid var(--bd);flex-shrink:0;flex-wrap:wrap;align-items:center;background:rgba(11,11,28,.4)}
.s-chip{padding:6px 14px;border-radius:50px;font-size:11px;font-weight:700;display:flex;align-items:center;gap:5px;border:1px solid}
.s-chip.s-words{background:rgba(124,58,237,.08);border-color:rgba(124,58,237,.18);color:var(--pl)}
.s-chip.s-unique{background:rgba(6,182,212,.08);border-color:rgba(6,182,212,.18);color:var(--a)}
.s-chip.s-chars{background:rgba(236,72,153,.08);border-color:rgba(236,72,153,.18);color:var(--pk)}
.s-chip.s-sent{background:rgba(16,185,129,.08);border-color:rgba(16,185,129,.18);color:var(--s)}
.s-chip.s-read{background:rgba(245,158,11,.08);border-color:rgba(245,158,11,.18);color:var(--w)}

/* N-GRAM TABS */
.ngram-tabs{display:flex;gap:2px;padding:10px 18px;border-bottom:1px solid var(--bd);flex-shrink:0;background:rgba(11,11,28,.3)}
.ng-tab{padding:7px 16px;border:none;border-radius:50px;font-size:12px;font-weight:600;cursor:pointer;transition:var(--tr);font-family:var(--f);background:var(--bg4);color:var(--t3);border:1px solid transparent}
.ng-tab.on{background:linear-gradient(135deg,var(--p),var(--pd));color:#fff;box-shadow:0 2px 10px var(--pg);border-color:transparent}
.ng-tab:hover:not(.on){color:var(--t1);border-color:var(--bd)}

/* KEYWORD SEARCH */
.kw-search{padding:8px 18px;border-bottom:1px solid var(--bd);flex-shrink:0;display:flex;gap:8px;align-items:center;background:rgba(11,11,28,.3)}
.kw-input{flex:1;padding:7px 12px;background:var(--bg3);border:1px solid var(--bd);border-radius:var(--rs);color:var(--t1);font-size:12px;font-family:var(--f);outline:none;transition:var(--tr)}
.kw-input:focus{border-color:var(--p);box-shadow:0 0 0 3px var(--pg)}
.kw-input::placeholder{color:var(--t3)}
.match-count{font-size:11px;color:var(--t3);font-weight:600;white-space:nowrap}

/* RESULTS TABLE */
.res-wrap{flex:1;overflow-y:auto;overflow-x:hidden}
.res-wrap::-webkit-scrollbar{width:6px}
.res-wrap::-webkit-scrollbar-thumb{background:var(--bd);border-radius:3px}

.res-tbl{width:100%;border-collapse:collapse;font-size:13px}
.res-tbl thead{position:sticky;top:0;z-index:5}
.res-tbl th{padding:10px 16px;background:var(--bg3);border-bottom:2px solid var(--bd);text-align:left;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--t2);cursor:pointer;user-select:none;transition:var(--tr);white-space:nowrap}
.res-tbl th:hover{color:var(--t1);background:var(--bg4)}
.res-tbl th .arr{margin-left:4px;font-size:8px;opacity:.4}
.res-tbl th.sorted .arr{opacity:1;color:var(--a)}
.res-tbl td{padding:9px 16px;border-bottom:1px solid rgba(124,58,237,.05);vertical-align:middle}
.res-tbl tr:hover td{background:rgba(124,58,237,.03)}

/* Keyword cell */
.kw-text{font-weight:600;font-size:13px}
.kw-text.kw-hi{color:var(--a)}

/* Density bar */
.den-bar-wrap{display:flex;align-items:center;gap:8px}
.den-bar{width:100px;height:7px;background:var(--bg4);border-radius:4px;overflow:hidden;flex-shrink:0}
.den-fill{height:100%;border-radius:4px;transition:width .4s ease}
.den-fill.low{background:var(--s)}
.den-fill.mid{background:var(--a)}
.den-fill.high{background:var(--w)}
.den-fill.over{background:var(--e)}
.den-val{font-size:12px;font-weight:700;min-width:44px;font-variant-numeric:tabular-nums}

/* Count */
.cnt-val{font-size:13px;font-weight:700;color:var(--t2);font-variant-numeric:tabular-nums;text-align:center}
.rank-badge{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:50%;font-size:11px;font-weight:800;flex-shrink:0}
.rank-badge.r1{background:linear-gradient(135deg,#FFD700,#FFA500);color:#000}
.rank-badge.r2{background:linear-gradient(135deg,#C0C0C0,#A0A0A0);color:#000}
.rank-badge.r3{background:linear-gradient(135deg,#CD7F32,#A0522D);color:#fff}
.rank-badge.rn{background:var(--bg5);color:var(--t3)}

/* PROMINENCE */
.prom-dots{display:flex;gap:2px}
.prom-dot{width:6px;height:6px;border-radius:50%;background:var(--bg5)}
.prom-dot.filled{background:var(--a)}

/* EMPTY */
.empty{text-align:center;padding:60px 24px;color:var(--t3)}
.empty .em-ico{font-size:52px;margin-bottom:12px;opacity:.4}
.empty h3{font-size:17px;color:var(--t2);margin-bottom:4px}
.empty p{font-size:12px;max-width:400px;margin:0 auto;line-height:1.6}

/* VISUAL CHART */
.chart-section{padding:14px 18px;border-bottom:1px solid var(--bd);flex-shrink:0;background:rgba(11,11,28,.3)}
.chart-title{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--t3);margin-bottom:8px}
.chart-bars{display:flex;align-items:flex-end;gap:4px;height:80px;padding-bottom:2px}
.chart-col{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;min-width:0}
.chart-bar{width:100%;border-radius:3px 3px 0 0;transition:height .4s ease;min-height:2px;cursor:pointer;position:relative}
.chart-bar:hover{opacity:.8}
.chart-bar-tip{display:none;position:absolute;bottom:calc(100% + 6px);left:50%;transform:translateX(-50%);padding:4px 8px;background:var(--bg3);border:1px solid var(--bd);border-radius:var(--rx);font-size:10px;font-weight:600;color:var(--t1);white-space:nowrap;z-index:10;box-shadow:0 4px 12px rgba(0,0,0,.4);pointer-events:none}
.chart-bar:hover .chart-bar-tip{display:block}
.chart-label{font-size:8px;color:var(--t3);text-align:center;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%;line-height:1.1}

/* FOOTER */
.ftr{display:flex;align-items:center;justify-content:space-between;padding:5px 24px;height:30px;background:rgba(11,11,28,.82);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:14px;right:14px;z-index:10000;display:flex;flex-direction:column;gap:7px;pointer-events:none}
.tst{padding:11px 16px;background:var(--bg3);border:1px solid var(--bd);border-radius:var(--rm);backdrop-filter:blur(18px);box-shadow:0 12px 44px rgba(0,0,0,.45);display:flex;align-items:center;gap:9px;font-size:12px;font-weight:500;animation:tI .3s ease;max-width:380px;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:900px){
  .main{flex-direction:column}
  .panel-l{width:100%;min-width:unset;max-height:40vh;border-right:none;border-bottom:1px solid var(--bd)}
  .panel-r{min-height:200px}
  .chart-bars{height:60px}
}
@media(max-width:600px){
  .hdr{padding:7px 12px}
  .logo-t{font-size:14px}
  .stats-row{padding:8px 12px}
  .s-chip{padding:4px 8px;font-size:10px}
  .opts-bar{padding:8px 12px;gap:8px}
  .res-tbl th,.res-tbl td{padding:7px 10px;font-size:11px}
  .den-bar{width:60px}
  .ngram-tabs{padding:8px 12px}
  .chart-section{padding:10px 12px}
}