:root{
  --bg:#ffffff;
  --surface:#f8f9fb;
  --border:#e8eaed;
  --border2:#d1d5db;
  --ink:#111827;
  --mid:#6b7280;
  --faint:#f3f4f6;
  --accent:#0066ff;
  --accent-bg:#eff4ff;
  --danger:#dc2626;
  --danger-bg:#fef2f2;
  --green:#16a34a;
  --mono:'SFMono-Regular',Consolas,'Liberation Mono',Menlo,monospace;
  --sans:-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);min-height:100vh;-webkit-font-smoothing:antialiased}

/* NAV */
nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 2rem;height:54px;gap:0}
.nav-brand{font-size:1.1rem;font-weight:600;color:var(--ink);text-decoration:none;margin-right:2.5rem;white-space:nowrap;letter-spacing:-.01em}
.nav-brand span{color:var(--accent)}
.nav-tabs{display:flex;height:100%;flex:1;gap:.25rem;align-items:center}
.nav-tab{font-size:.82rem;font-weight:500;color:var(--mid);padding:.38rem .85rem;border:none;background:none;cursor:pointer;border-radius:6px;transition:color .15s,background .15s;white-space:nowrap}
.nav-tab:hover{color:var(--ink);background:var(--faint)}
.nav-tab.active{color:var(--accent);background:var(--accent-bg)}
.nav-tab.disabled{color:var(--border2);cursor:not-allowed;position:relative}
.nav-tab.disabled:hover{background:none;color:var(--border2)}
.nav-tab.disabled::after{content:attr(data-tooltip);position:absolute;bottom:-28px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;font-size:.65rem;padding:.2rem .5rem;border-radius:4px;white-space:nowrap;pointer-events:none;opacity:0;transition:opacity .15s}
.nav-tab.disabled:hover::after{opacity:1}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:.3rem}
.lang-btn{display:none}
.lang-btn.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.menu-toggle{display:none}

/* PAGES */
.page{display:none}.page.active{display:block;animation:fu .2s ease}
@keyframes fu{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}

/* LANDING */
.hero-wrap{max-width:1000px;margin:0 auto;padding:5rem 2rem 0}
.badge-row{display:flex;align-items:center;gap:.7rem;margin-bottom:1.5rem}
.lab-badge{display:inline-flex;align-items:center;gap:.5rem;padding:.3rem .75rem;background:var(--faint);border:1px solid var(--border);border-radius:20px;font-size:.75rem;color:var(--mid);font-weight:500}
.lab-badge img{height:18px;width:auto;border-radius:2px}
.hero-h{font-size:clamp(2.2rem,4.5vw,3.4rem);font-weight:600;line-height:1.1;letter-spacing:-.03em;margin-bottom:1.1rem;color:var(--ink)}
.hero-h mark{background:none;color:var(--accent);border-bottom:3px solid var(--accent);padding-bottom:1px}
.hero-sub{font-size:1.02rem;color:var(--mid);line-height:1.8;max-width:580px;font-weight:400;margin-bottom:3rem}

.section-divider{max-width:1000px;margin:0 auto;padding:0 2rem;display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-bottom:1rem}
.prob-card{padding:1.5rem;border:1px solid var(--border);border-radius:12px;background:var(--surface)}
.prob-chip{display:inline-block;font-size:.7rem;font-weight:600;padding:.2rem .6rem;border-radius:20px;background:var(--danger-bg);color:var(--danger);margin-bottom:.8rem;letter-spacing:.02em}
.prob-card h3{font-size:.95rem;font-weight:600;margin-bottom:.55rem;color:var(--ink)}
.prob-card p{font-size:.84rem;color:var(--mid);line-height:1.7;font-weight:400}

.sol-card{max-width:1000px;margin:0 auto;padding:0 2rem 2rem}
.sol-inner{padding:1.5rem;border:1px solid var(--accent);border-radius:12px;background:var(--accent-bg);display:flex;gap:1.2rem;align-items:flex-start}
.sol-icon{flex-shrink:0;width:36px;height:36px;background:var(--accent);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:.9rem;font-weight:700;margin-top:.1rem}
.sol-body h3{font-size:.95rem;font-weight:600;margin-bottom:.5rem;color:var(--accent)}
.sol-body p{font-size:.84rem;color:#1e40af;line-height:1.7}

.team-bar{max-width:1000px;margin:0 auto;padding:1.2rem 2rem 2.5rem;display:flex;gap:2rem;flex-wrap:wrap;align-items:center;border-top:1px solid var(--border)}
.team-item{font-size:.75rem;color:var(--mid)}
.team-item strong{color:var(--ink);font-weight:500}

/* TAB */
.tab-wrap{max-width:1000px;margin:0 auto;padding:2rem}
.tab-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.4rem;flex-wrap:wrap;gap:.8rem}
.tab-title{font-size:1.25rem;font-weight:600;letter-spacing:-.02em;color:var(--ink)}
.tab-title em{font-style:normal;color:var(--accent)}

/* BUTTON */
.btn{font-size:.78rem;font-weight:500;padding:.5rem 1rem;border:1px solid var(--border2);background:var(--bg);color:var(--ink);cursor:pointer;border-radius:7px;transition:all .15s}
.btn:hover{border-color:var(--ink);background:var(--faint)}
.btn.pri{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn.pri:hover{background:#0052cc}

/* SEARCH */
.sbar{display:flex;border:1.5px solid var(--border2);border-radius:8px;overflow:hidden;margin-bottom:1.2rem;max-width:560px}
.sbar:focus-within{border-color:var(--accent)}
.sbar input{flex:1;font-family:var(--sans);font-size:.84rem;padding:.6rem 1rem;border:none;background:var(--bg);color:var(--ink);outline:none}
.sbar input::placeholder{color:#bbb}
.sbar button{font-size:.78rem;padding:.6rem 1.1rem;border:none;border-left:1px solid var(--border);background:var(--faint);color:var(--mid);cursor:pointer;font-weight:500;transition:background .15s}
.sbar button:hover{background:var(--border)}

/* TABLE */
.tbl-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:10px}
table{width:100%;border-collapse:collapse;font-size:.8rem;table-layout:fixed}
thead{background:var(--surface)}
th{text-align:left;padding:.65rem 1rem;font-size:.72rem;font-weight:600;color:var(--mid);letter-spacing:.04em;text-transform:uppercase;border-bottom:1px solid var(--border);position:relative;overflow:hidden;white-space:nowrap}
th:nth-child(1){width:52px}
th:nth-child(2){width:210px}
th:nth-child(3){width:130px}
th:nth-child(4){width:240px}
th:nth-child(5){width:110px}
td{padding:.65rem 1rem;border-bottom:1px solid var(--faint);color:var(--ink);vertical-align:middle;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
tr:last-child td{border-bottom:none}
tr:hover td{background:var(--faint)}
.col-resize-handle{position:absolute;right:0;top:0;bottom:0;width:6px;cursor:col-resize;z-index:1}
.col-resize-handle::after{content:'';position:absolute;right:1px;top:15%;bottom:15%;width:2px;border-radius:1px;background:var(--border2);transition:background .15s}
.col-resize-handle:hover::after,.col-resize-handle.dragging::after{background:var(--accent)}
.pill{display:inline-block;font-family:var(--mono);font-size:.72rem;padding:.15rem .5rem;background:var(--faint);border:1px solid var(--border);border-radius:4px;color:var(--ink);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;vertical-align:bottom}
.badge{font-size:.72rem;padding:.15rem .5rem;background:var(--faint);border-radius:4px;color:var(--mid);font-weight:500}
.conce{font-size:.75rem;color:var(--danger);font-weight:500}
.cpers{font-size:.75rem;color:var(--green);font-weight:500}
.re{font-family:var(--mono);font-size:.7rem;color:var(--mid);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:block}
.ref-link{display:inline-flex;align-items:center;margin-left:.35rem;color:var(--accent);opacity:.6;transition:opacity .15s;vertical-align:middle;text-decoration:none}
.ref-link:hover{opacity:1}
.pinfo{font-size:.75rem;color:var(--mid);margin-top:.8rem;text-align:right}

/* LOOKUP */
.lform{display:flex;border:2px solid var(--border2);border-radius:10px;overflow:hidden;max-width:680px;margin-bottom:.7rem;transition:border-color .15s}
.lform:focus-within{border-color:var(--accent)}
.lform input{flex:1;font-family:var(--sans);font-size:.92rem;padding:.85rem 1.2rem;border:none;background:var(--bg);color:var(--ink);outline:none}
.lform input::placeholder{color:#bbb}
.ltoggle{display:flex;align-items:center;gap:.5rem;border-left:1px solid var(--border);padding:0 1rem;background:var(--surface);font-size:.75rem;font-weight:500;color:var(--mid);white-space:nowrap;cursor:pointer;user-select:none}
.ltoggle input{accent-color:var(--accent);cursor:pointer}
.lbtn{font-size:.82rem;font-weight:600;padding:.85rem 1.5rem;border:none;border-left:1px solid var(--border);background:var(--accent);color:#fff;cursor:pointer;transition:background .15s}
.lbtn:hover{background:#0052cc}
.lhint{font-size:.75rem;color:var(--mid);margin-bottom:1.8rem}
.lhint code{background:var(--faint);padding:.08rem .3rem;border-radius:3px;font-family:var(--mono)}
.lbar{display:none;height:3px;background:linear-gradient(90deg,var(--bg),var(--accent),var(--bg));background-size:200%;animation:shim 1s infinite;border-radius:2px;margin-bottom:.8rem;max-width:680px}
@keyframes shim{from{background-position:200% 0}to{background-position:-200% 0}}
.lbar.show{display:block}
.res-hdr{font-size:.78rem;font-weight:600;color:var(--mid);padding-bottom:.6rem;border-bottom:1px solid var(--border);margin-bottom:.8rem;display:flex;justify-content:space-between;align-items:center}
.res-cnt{color:var(--accent);font-weight:600}
.rec{border:1px solid var(--border);border-radius:8px;margin-bottom:.5rem;background:var(--bg);overflow:hidden;animation:sli .18s ease}
@keyframes sli{from{opacity:0;transform:translateY(-2px)}to{opacity:1;transform:translateY(0)}}
.rec-head{display:flex;align-items:center;gap:.7rem;padding:.6rem .9rem;background:var(--surface);border-bottom:1px solid var(--border)}
.rec-t{font-family:var(--mono);font-size:.68rem;font-weight:500;background:var(--ink);color:#fff;padding:.15rem .4rem;border-radius:3px}
.dv-badge{font-size:.68rem;font-weight:600;background:var(--accent-bg);color:var(--accent);padding:.15rem .5rem;border-radius:3px}
.rec-body{padding:.7rem .9rem}
.rec-v{font-family:var(--mono);font-size:.78rem;word-break:break-all;line-height:1.5;color:var(--ink)}
.empty{text-align:center;padding:4rem 1rem;color:var(--mid)}
.empty .big{font-size:2.5rem;margin-bottom:.5rem;opacity:.2}
.empty p{font-size:.82rem}

/* DVF */
.dvf-sec{border:1px solid var(--border);border-radius:12px;padding:1.4rem 1.5rem;margin-bottom:.85rem;background:var(--bg)}
.dvf-sec-hdr{display:flex;align-items:center;justify-content:space-between;margin-bottom:.9rem}
.dvf-sec-head{font-size:.72rem;font-weight:600;color:var(--mid);letter-spacing:.04em;text-transform:uppercase}
.dvf-hdr-btn{font-size:.72rem;padding:.28rem .7rem;color:var(--mid);border-color:var(--border)}
.dvf-ta{width:100%;font-family:var(--mono);font-size:.78rem;border:1.5px solid var(--border2);border-radius:8px;padding:.7rem 1rem;resize:vertical;min-height:90px;background:var(--bg);color:var(--ink);outline:none;transition:border-color .15s;line-height:1.6;box-sizing:border-box}
.dvf-ta:focus{border-color:var(--accent)}
.dvf-ta-out{background:var(--surface);color:var(--mid);cursor:default;resize:none;min-height:72px}
.dvf-ta-meta{font-size:.7rem;color:var(--mid);margin-top:.4rem;min-height:.9rem}
.dvf-algo-btns{display:flex;gap:.5rem;margin-bottom:.9rem}
.dvf-algo-btn{flex:1;display:flex;flex-direction:column;align-items:center;gap:.18rem;padding:.65rem .5rem;border:1.5px solid var(--border2);border-radius:8px;background:var(--bg);cursor:pointer;transition:all .15s}
.dvf-algo-btn:hover{border-color:var(--accent);background:var(--accent-bg)}
.dvf-algo-btn.active{border-color:var(--accent);background:var(--accent-bg)}
.dvf-algo-name{font-size:.8rem;font-weight:600;color:var(--ink);transition:color .15s}
.dvf-algo-sub{font-size:.68rem;color:var(--mid);font-family:var(--mono);transition:color .15s}
.dvf-algo-btn:hover .dvf-algo-name,.dvf-algo-btn.active .dvf-algo-name{color:var(--accent)}
.dvf-algo-btn:hover .dvf-algo-sub,.dvf-algo-btn.active .dvf-algo-sub{color:var(--accent)}
.dvf-copy-btn{width:28px;height:28px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:6px;background:var(--bg);color:var(--mid);cursor:pointer;transition:all .15s;flex-shrink:0}
.dvf-copy-btn:hover{border-color:var(--ink);color:var(--ink)}
.dvf-copy-btn.copied{border-color:var(--green);color:var(--green)}
.dvf-verify-input{width:100%;font-family:var(--mono);font-size:.82rem;border:1.5px solid var(--border2);border-radius:8px;padding:.7rem 1rem;background:var(--bg);color:var(--ink);outline:none;transition:border-color .15s;box-sizing:border-box;margin-top:.9rem;margin-bottom:.65rem}
.dvf-verify-input:focus{border-color:var(--accent)}
.dvf-verify-footer{display:flex;align-items:center;justify-content:space-between;min-height:2rem}
.dvf-manual-btn{font-size:.78rem;padding:.42rem 1rem}
.dvf-result{display:flex;align-items:center;gap:.45rem;font-size:.95rem;font-weight:600;min-height:1.6rem}
.dvf-result-icon{font-size:1rem;line-height:1}
.dvf-match{color:var(--green)}
.dvf-nomatch{color:var(--danger)}
.dvf-live-toggle{display:flex;align-items:center;gap:.45rem;cursor:pointer;user-select:none}
.dvf-live-toggle input{display:none}
.dvf-toggle-track{position:relative;width:32px;height:18px;background:var(--border2);border-radius:9px;transition:background .2s;flex-shrink:0}
.dvf-toggle-thumb{position:absolute;top:2px;left:2px;width:14px;height:14px;background:#fff;border-radius:50%;transition:transform .2s;box-shadow:0 1px 3px rgba(0,0,0,.2)}
.dvf-live-toggle input:checked + .dvf-toggle-track{background:var(--accent)}
.dvf-live-toggle input:checked + .dvf-toggle-track .dvf-toggle-thumb{transform:translateX(14px)}
.dvf-toggle-label{font-size:.72rem;font-weight:500;color:var(--mid)}

/* RESPONSIVE */
@keyframes mopen{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}
@media (max-width:768px){
  nav{padding:0 1rem;height:auto;flex-wrap:wrap}
  .nav-brand{margin-right:auto;font-size:1rem;padding:.75rem 0}
  .nav-right{margin-left:0;order:1;gap:.3rem}
  .menu-toggle{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border:1px solid var(--border2);background:none;cursor:pointer;border-radius:6px;color:var(--mid);padding:0;transition:background .15s}
  .menu-toggle:hover,.menu-toggle.active{background:var(--faint)}
  .menu-toggle .icon-open{display:block}
  .menu-toggle .icon-close{display:none}
  .menu-toggle.active .icon-open{display:none}
  .menu-toggle.active .icon-close{display:block}
  .nav-tabs{display:none;width:100%;order:2;flex-direction:column;padding:.4rem 0 .5rem;border-top:1px solid var(--border);flex:none;height:auto;gap:.1rem;animation:mopen .18s ease}
  .nav-tabs.open{display:flex}
  .nav-tab{font-size:.88rem;padding:.6rem .85rem;flex-shrink:0;width:100%;text-align:left;border-radius:7px}
  .hero-wrap{padding:2rem 1.25rem 0}
  .hero-sub{font-size:.92rem}
  .section-divider{grid-template-columns:1fr;padding:0 1.25rem;margin-bottom:1rem}
  .sol-card{padding:0 1.25rem 1.5rem}
  .sol-inner{flex-direction:column;gap:.75rem}
  .team-bar{padding:1rem 1.25rem 2rem;gap:1rem}
  .tab-wrap{padding:1.25rem}
  .sbar{max-width:100%}
  .lform{flex-direction:column;border-radius:10px}
  .lform input{padding:.75rem 1rem;border-radius:0}
  .ltoggle{border-left:none;border-top:1px solid var(--border);justify-content:flex-start;padding:.5rem 1rem}
  .lbtn{border-left:none;border-top:1px solid var(--border);padding:.75rem 1.5rem;text-align:center}
  .lhint{font-size:.7rem}
  .tab-head{flex-direction:column;align-items:flex-start;gap:.6rem}
  .dvf-algo-btns{gap:.4rem}
  .dvf-algo-btn{padding:.55rem .3rem}
}
@media (max-width:400px){
  .hero-h{font-size:1.85rem}
  .sol-icon{width:30px;height:30px;font-size:.75rem}
}