:root{--brand:#2f55d4;--brand-d:#1e3a9e;--accent:#f29d1d;--c3:#14a37f;--c4:#d9467a;--c5:#7c5cd6;--ink:#141a2e;--ink2:#3a4258;--muted:#6b7389;--bg:#f6f7fb;--card:#ffffff;--line:#e3e6ef;--grid:#eceef4;--soft:#eef2ff;--ok:#0f8a5f;--r:14px;--shadow:0 1px 2px rgba(20,26,46,.06),0 6px 24px rgba(20,26,46,.06);--font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--brand:#7d98ff;--brand-d:#a9baff;--accent:#ffb547;--c3:#3fd0a6;--c4:#ff7aa8;--c5:#a98bff;--ink:#eef0f7;--ink2:#c5cadb;--muted:#9aa2ba;--bg:#0e1220;--card:#161b2c;--line:#262d44;--grid:#232a3f;--soft:#1c2440;--shadow:none}}
:root[data-theme=dark]{--brand:#7d98ff;--brand-d:#a9baff;--accent:#ffb547;--c3:#3fd0a6;--c4:#ff7aa8;--c5:#a98bff;--ink:#eef0f7;--ink2:#c5cadb;--muted:#9aa2ba;--bg:#0e1220;--card:#161b2c;--line:#262d44;--grid:#232a3f;--soft:#1c2440;--shadow:none}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.65 var(--font);color:var(--ink);background:var(--bg);overflow-x:hidden}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
img,canvas,svg{max-width:100%;height:auto;display:block}
h1,h2,h3{line-height:1.25;letter-spacing:-.01em;color:var(--ink)}h1{font-size:clamp(1.65rem,4vw,2.3rem);margin:.2em 0 .35em}h2{font-size:1.35rem;margin:1.8em 0 .6em}h3{font-size:1.08rem;margin:1.3em 0 .4em}
p{margin:.6em 0}code{font-family:var(--mono);font-size:.92em;background:var(--soft);padding:.1em .35em;border-radius:5px}
.wrap{max-width:1180px;margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:var(--card);padding:8px;z-index:99}
/* header */
.hdr{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}
.hdr .wrap{display:flex;align-items:center;gap:14px;height:62px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:1.25rem;color:var(--ink);letter-spacing:-.02em}.logo:hover{text-decoration:none}.logo svg{width:32px;height:32px;flex:none}
.nav{display:flex;gap:2px;margin-left:8px}.nav a{color:var(--ink2);font-size:.93rem;font-weight:550;padding:7px 10px;border-radius:8px;white-space:nowrap}.nav a:hover{background:var(--soft);color:var(--brand);text-decoration:none}
.hdr .search{margin-left:auto;flex:0 1 300px}
.icon-btn{background:none;border:1px solid var(--line);border-radius:9px;width:38px;height:38px;color:var(--ink2);cursor:pointer;font-size:1.05rem;display:inline-grid;place-items:center;flex:none}
#menu-toggle{display:none}
.search{position:relative}.search input{width:100%;height:40px;border:1px solid var(--line);border-radius:10px;padding:0 12px 0 36px;background:var(--bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%236b7389' stroke-width='2'%3E%3Ccircle cx='7' cy='7' r='5'/%3E%3Cpath d='m11 11 4 4'/%3E%3C/svg%3E") 12px center no-repeat;color:var(--ink);font:inherit;font-size:.95rem}
.search input:focus{outline:2px solid var(--brand);outline-offset:1px;background-color:var(--card)}
.search-results{position:absolute;left:0;right:0;top:46px;background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 40px rgba(0,0,0,.15);max-height:420px;overflow:auto;z-index:40;padding:6px}
.search-results a{display:flex;justify-content:space-between;gap:10px;padding:9px 10px;border-radius:8px;color:var(--ink)}.search-results a:hover,.search-results a.on{background:var(--soft);text-decoration:none}.search-results small{color:var(--muted);white-space:nowrap}.search-results p{margin:8px;color:var(--muted)}
@media(max-width:960px){.nav{display:none;position:absolute;top:62px;left:0;right:0;background:var(--card);flex-direction:column;padding:10px 16px;border-bottom:1px solid var(--line);margin:0}.nav-open .nav{display:flex}#menu-toggle{display:inline-grid}.hdr .search{flex:1 1 auto}}
@media(max-width:520px){.logo span{display:none}}
/* layout */
main{padding:18px 0 40px}
.crumbs{font-size:.86rem;color:var(--muted);margin:4px 0 6px;display:flex;flex-wrap:wrap;gap:4px}.crumbs a{color:var(--muted)}.crumbs span[aria-hidden]{opacity:.6}
.lead{font-size:1.08rem;color:var(--ink2);max-width:70ch}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:.78rem;font-weight:650;letter-spacing:.02em;text-transform:uppercase;color:var(--brand);background:var(--soft);padding:4px 10px;border-radius:99px}
.grid2{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:24px;align-items:start}
@media(max-width:960px){.grid2{grid-template-columns:minmax(0,1fr)}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:20px}
.tool{margin:16px 0}
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px}
.field label{display:block;font-size:.88rem;font-weight:600;color:var(--ink2);margin-bottom:5px}
.field.wide{grid-column:1/-1}
.ctl{display:flex;align-items:stretch;border:1px solid var(--line);border-radius:10px;background:var(--bg);overflow:hidden}
.ctl:focus-within{outline:2px solid var(--brand);outline-offset:1px;background:var(--card)}
.ctl input,.ctl select,.ctl textarea{flex:1;min-width:0;border:0;background:transparent;color:var(--ink);font:inherit;padding:10px 12px;outline:none}
.ctl select{cursor:pointer}.ctl textarea{min-height:150px;resize:vertical;font-family:var(--mono);font-size:.9rem;line-height:1.5}
.ctl .unit{display:grid;place-items:center;padding:0 12px;color:var(--muted);font-size:.86rem;border-left:1px solid var(--line);background:var(--card);white-space:nowrap}
.cbx{display:flex;align-items:center;gap:8px;font-weight:550;color:var(--ink2);padding-top:28px;cursor:pointer}.cbx input{width:18px;height:18px;accent-color:var(--brand)}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.btn{display:inline-flex;align-items:center;gap:7px;border:0;border-radius:10px;padding:11px 18px;font:inherit;font-weight:650;cursor:pointer;background:var(--brand);color:#fff;text-decoration:none}.btn:hover{filter:brightness(1.08);text-decoration:none}
.btn.ghost{background:transparent;color:var(--ink2);border:1px solid var(--line)}.btn.small{padding:6px 11px;font-size:.84rem;font-weight:600}
:root[data-theme=dark] .btn:not(.ghost),.btn:not(.ghost){color:#fff}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .btn:not(.ghost){color:#0e1220}}:root[data-theme=dark] .btn:not(.ghost){color:#0e1220}
.results{margin-top:18px;border-top:1px dashed var(--line);padding-top:16px}
.results h2{margin:0 0 10px;font-size:1rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.res{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.res-item{background:var(--soft);border-radius:12px;padding:12px 14px;position:relative}
.res-item .k{font-size:.84rem;color:var(--ink2);font-weight:600}
.res-item .v{font-size:1.35rem;font-weight:750;color:var(--ink);word-break:break-word;line-height:1.3;margin-top:3px;font-variant-numeric:tabular-nums}
.res-item.primary{background:linear-gradient(135deg,var(--brand),var(--brand-d));grid-column:1/-1}
.res-item.primary .k,.res-item.primary .v{color:#fff}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .res-item.primary .k,:root:not([data-theme=light]) .res-item.primary .v{color:#0e1220}}:root[data-theme=dark] .res-item.primary .k,:root[data-theme=dark] .res-item.primary .v{color:#0e1220}
.res-item .cp{position:absolute;top:8px;right:8px;background:rgba(255,255,255,.18);color:inherit;border:0;border-radius:7px;font-size:.75rem;padding:3px 8px;cursor:pointer}
.res-item:not(.primary) .cp{background:var(--card);color:var(--ink2)}
.res-block{grid-column:1/-1}.res-block .ctl textarea{min-height:170px}
.res-block .bar{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:6px;font-weight:600;color:var(--ink2);font-size:.9rem}
.chart-card h2{margin:0 0 4px;font-size:1.15rem}.chart-card .sub{color:var(--muted);font-size:.9rem;margin:0 0 12px}
.chart-wrap{position:relative;width:100%}
.ad-slot{margin:22px 0;min-height:0;text-align:center}
.ad-slot:empty{display:none}
article.content{max-width:76ch}
article.content ul,article.content ol{padding-left:1.3em}article.content li{margin:.3em 0}
.formula{background:var(--soft);border-left:4px solid var(--brand);padding:12px 16px;border-radius:0 10px 10px 0;font-family:var(--mono);font-size:.95rem;overflow-x:auto;white-space:pre-wrap}
.example{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
table{border-collapse:collapse;width:100%;font-size:.94rem;font-variant-numeric:tabular-nums}
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:var(--card)}
th,td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--line)}th{background:var(--soft);font-weight:650;color:var(--ink2)}tr:last-child td{border-bottom:0}
.faq details{border:1px solid var(--line);border-radius:12px;background:var(--card);margin:10px 0;padding:0 16px}
.faq summary{cursor:pointer;font-weight:650;padding:13px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}.faq summary::after{content:"+";color:var(--brand);font-size:1.3rem;line-height:1}.faq details[open] summary::after{content:"–"}
.faq summary::-webkit-details-marker{display:none}.faq details p{margin:0 0 14px;color:var(--ink2)}
.hero-fig{margin:18px 0;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);background:var(--card)}
.hero-fig figcaption{font-size:.84rem;color:var(--muted);padding:8px 14px}
.side .card{margin-bottom:16px}.side h2{font-size:1rem;margin:0 0 10px}
.side ul{list-style:none;margin:0;padding:0}.side li a{display:block;padding:7px 0;border-bottom:1px solid var(--line);color:var(--ink2);font-size:.94rem}.side li:last-child a{border:0}.side li a:hover{color:var(--brand)}
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.tile{display:flex;gap:12px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;color:var(--ink);transition:.15s}.tile:hover{border-color:var(--brand);transform:translateY(-1px);text-decoration:none;box-shadow:var(--shadow)}
.tile .ic{flex:none;width:38px;height:38px;border-radius:10px;display:grid;place-items:center;font-size:1.15rem;background:var(--soft)}
.tile b{display:block;font-size:.97rem;line-height:1.3}.tile small{display:block;color:var(--muted);font-size:.83rem;line-height:1.4;margin-top:3px}
.pills{display:flex;flex-wrap:wrap;gap:8px}.pills a{border:1px solid var(--line);background:var(--card);border-radius:99px;padding:6px 13px;font-size:.88rem;color:var(--ink2)}.pills a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}
/* home */
.hero{padding:44px 0 26px;text-align:center}.hero h1{font-size:clamp(2rem,5.5vw,3.2rem);margin:.25em auto .3em;max-width:18ch}
.hero .lead{margin:0 auto 22px;font-size:1.15rem}.hero .search{max-width:560px;margin:0 auto}.hero .search input{height:54px;font-size:1.05rem;border-radius:14px;padding-left:44px;background-position:16px center;box-shadow:var(--shadow);background-color:var(--card)}
.stats{display:flex;justify-content:center;flex-wrap:wrap;gap:28px;margin:26px 0 0;color:var(--muted);font-size:.94rem}.stats b{display:block;font-size:1.6rem;color:var(--ink)}
.cats{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.cat{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;color:var(--ink);display:block}.cat:hover{border-color:var(--brand);text-decoration:none;box-shadow:var(--shadow)}
.cat .ic{font-size:1.6rem}.cat h3{margin:.35em 0 .2em}.cat p{margin:0;color:var(--muted);font-size:.92rem}.cat .n{font-weight:700;color:var(--brand);font-size:.85rem}
.pillars{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}.pillars .card h3{margin-top:.2em}
.cat-block{margin-top:30px}.cat-block h2{display:flex;align-items:center;gap:10px}
.filter{max-width:420px;margin:10px 0 20px}
/* footer */
footer{background:var(--card);border-top:1px solid var(--line);padding:36px 0 26px;margin-top:40px;font-size:.92rem;color:var(--muted)}
.fgrid{display:grid;grid-template-columns:1.3fr repeat(3,1fr);gap:24px}@media(max-width:760px){.fgrid{grid-template-columns:1fr 1fr}}
footer h3{font-size:.9rem;text-transform:uppercase;letter-spacing:.06em;margin:0 0 10px;color:var(--ink)}footer ul{list-style:none;padding:0;margin:0}footer li{margin:6px 0}footer a{color:var(--muted)}footer a:hover{color:var(--brand)}
.legal-note{border-top:1px solid var(--line);margin-top:24px;padding-top:16px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px}
#consent{position:fixed;left:16px;right:16px;bottom:16px;max-width:620px;margin:0 auto;background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:0 12px 40px rgba(0,0,0,.2);padding:16px 18px;z-index:60;font-size:.92rem}
#consent p{margin:0 0 10px}#consent .actions{margin:0}
.notice{background:var(--soft);border-radius:12px;padding:12px 16px;font-size:.92rem;color:var(--ink2)}
.prose{max-width:78ch}.prose h2{margin-top:1.6em}
form.contact .field{margin-bottom:14px}
@media print{.hdr,footer,.ad-slot,.side,#consent{display:none}}
/* ---------- AI assistant ---------- */
.tai-launch{position:fixed;right:16px;bottom:16px;z-index:70;display:inline-flex;align-items:center;gap:7px;border:0;border-radius:99px;padding:12px 18px;font:inherit;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--brand),var(--c5));box-shadow:0 8px 28px rgba(47,85,212,.35);cursor:pointer}
.tai-launch:hover{filter:brightness(1.08)}
#consent:not([hidden])~.tai-launch{bottom:150px}
.tai-panel{position:fixed;right:16px;bottom:16px;z-index:80;width:min(400px,calc(100vw - 32px));height:min(600px,calc(100vh - 32px));display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:0 20px 60px rgba(0,0,0,.25);overflow:hidden}
.tai-panel[hidden]{display:none}
.tai-head{display:flex;align-items:center;gap:6px;padding:12px 12px 12px 16px;background:linear-gradient(135deg,var(--brand),var(--brand-d));color:#fff}
.tai-head div{flex:1;line-height:1.25}.tai-head small{display:block;opacity:.85;font-size:.76rem}
.tai-head .tai-ico{color:#fff;border-color:rgba(255,255,255,.35)}
.tai-ico{background:none;border:1px solid var(--line);border-radius:9px;width:34px;height:34px;display:inline-grid;place-items:center;cursor:pointer;font-size:.95rem;color:var(--ink2);flex:none}
.tai-log{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px;background:var(--bg)}
.tai-msg{max-width:88%;padding:10px 13px;border-radius:14px;font-size:.93rem;line-height:1.5;word-wrap:break-word}
.tai-assistant{background:var(--card);border:1px solid var(--line);align-self:flex-start;border-bottom-left-radius:4px}
.tai-user{background:var(--brand);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.tai-msg a{font-weight:600}.tai-msg code{font-size:.85em}
.tai-chips{display:flex;flex-wrap:wrap;gap:6px;padding:0 14px;background:var(--bg)}.tai-chips:empty{display:none}
.tai-chip{border:1px solid var(--line);background:var(--card);color:var(--ink2);border-radius:99px;padding:6px 11px;font:inherit;font-size:.82rem;cursor:pointer;margin-bottom:10px}.tai-chip:hover{border-color:var(--brand);color:var(--brand)}
.tai-form{display:flex;align-items:flex-end;gap:6px;padding:10px;border-top:1px solid var(--line);background:var(--card)}
.tai-form textarea{flex:1;resize:none;border:1px solid var(--line);border-radius:12px;padding:9px 12px;font:inherit;font-size:.94rem;background:var(--bg);color:var(--ink);max-height:120px}
.tai-form textarea:focus{outline:2px solid var(--brand);outline-offset:0}
.tai-send{border:0;border-radius:11px;width:40px;height:40px;background:var(--brand);color:#fff;cursor:pointer;font-size:1rem;flex:none}
.tai-mic.on{background:#e53e3e;color:#fff;border-color:#e53e3e;animation:taiPulse 1.2s infinite}
@keyframes taiPulse{50%{box-shadow:0 0 0 6px rgba(229,62,62,.25)}}
.tai-note{margin:0;padding:6px 12px 9px;font-size:.72rem;color:var(--muted);background:var(--card);text-align:center}
.tai-dots{display:inline-flex;gap:4px}.tai-dots i{width:7px;height:7px;border-radius:50%;background:var(--muted);animation:taiDot 1s infinite}.tai-dots i:nth-child(2){animation-delay:.15s}.tai-dots i:nth-child(3){animation-delay:.3s}
@keyframes taiDot{50%{opacity:.25;transform:translateY(-3px)}}
@media(max-width:520px){.tai-panel{right:0;bottom:0;width:100vw;height:100dvh;border-radius:0}.tai-launch{padding:11px 15px}}
@media print{.tai-launch,.tai-panel{display:none}}
/* ---------- accounts ---------- */
.acct-wrap{max-width:760px}
#acct .card{margin-bottom:16px}#acct h2{margin:0 0 4px}#acct h3{margin:6px 0 12px}
.tabs{display:flex;gap:6px;margin:6px 0 12px}.tabs button{flex:1;border:1px solid var(--line);background:var(--card);color:var(--ink2);border-radius:11px;padding:11px;font:inherit;font-weight:650;cursor:pointer}.tabs button.on{background:var(--brand);border-color:var(--brand);color:#fff}
.sub{color:var(--muted);font-size:.93rem}
.consents{border:1px solid var(--line);border-radius:12px;padding:6px 14px 10px;margin:16px 0}.consents legend{font-weight:700;padding:0 6px;color:var(--ink2)}
.consent{display:flex;gap:10px;align-items:flex-start;padding:9px 0;border-bottom:1px solid var(--line);font-size:.9rem;line-height:1.45;color:var(--ink2);cursor:pointer}.consent:last-child{border:0}
.consent input{width:18px;height:18px;margin-top:2px;flex:none;accent-color:var(--brand)}.consent small{color:var(--muted)}
.notice.ok{background:#e7f8ef;color:#0b6b43}.notice.err{background:#fdecec;color:#a61b1b}
:root[data-theme=dark] .notice.ok{background:#11352a;color:#7ee2b4}:root[data-theme=dark] .notice.err{background:#3d1717;color:#ff9c9c}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .notice.ok{background:#11352a;color:#7ee2b4}:root:not([data-theme=light]) .notice.err{background:#3d1717;color:#ff9c9c}}
.notice{margin:10px 0}.btn.danger{color:#c53030;border-color:#f3b5b5}
.cta{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;background:linear-gradient(135deg,var(--soft),var(--card));border:1px solid var(--line);border-radius:var(--r);padding:20px 22px;margin:28px 0}
.cta h2,.cta h3{margin:0 0 4px}.cta p{margin:0;color:var(--muted)}
.signin{white-space:nowrap;font-weight:650;font-size:.92rem;border:1px solid var(--line);border-radius:9px;padding:8px 12px;color:var(--ink2)}.signin:hover{border-color:var(--brand);text-decoration:none}
@media(max-width:620px){.signin{display:none}}