/* Bing Homepage Quiz — design system (light/dark, mobile-first) */
@font-face{font-family:'Inter';src:url('../fonts/inter-400.woff2') format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'Inter';src:url('../fonts/inter-700.woff2') format('woff2');font-weight:700;font-display:swap}
:root{
--bg:#f6f7fb;--bg-soft:#fff;--ink:#12142b;--ink-soft:#454a6b;--line:#e4e6f2;
--brand:#6d5cff;--brand-2:#00c2a8;--accent:#ffb020;
--card:#ffffff;--shadow:0 10px 30px rgba(18,20,43,.08);--shadow-lg:0 24px 60px rgba(18,20,43,.14);
--grad:linear-gradient(120deg,#6d5cff 0%,#8a5cff 40%,#00c2a8 100%);
--radius:18px;--radius-s:12px;--maxw:1180px;
--ok:#0f9d58;--bad:#d93025;
}
[data-theme="dark"]{
--bg:#0b0d1a;--bg-soft:#12142b;--ink:#eef0ff;--ink-soft:#a9aecb;--line:#23264a;
--card:#151834;--shadow:0 10px 30px rgba(0,0,0,.35);--shadow-lg:0 24px 60px rgba(0,0,0,.5);
--accent:#ffcf5c;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.72;font-size:1.02rem;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.site-head{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:color-mix(in srgb,var(--bg) 82%,transparent);border-bottom:1px solid var(--line)}
.head-in{display:flex;align-items:center;gap:18px;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.06rem;color:var(--ink);white-space:nowrap}
.logo:hover{text-decoration:none}
.logo svg{flex:none}
.logo em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.main-nav{margin-left:auto;display:flex;gap:4px;align-items:center}
.main-nav a{color:var(--ink-soft);font-weight:600;font-size:.92rem;padding:8px 12px;border-radius:10px}
.main-nav a:hover{color:var(--ink);background:var(--card);text-decoration:none}
#themeBtn{border:1px solid var(--line);background:var(--card);color:var(--ink);width:40px;height:40px;border-radius:12px;cursor:pointer;font-size:1.05rem;display:grid;place-items:center}
.burger{display:none;border:1px solid var(--line);background:var(--card);color:var(--ink);width:40px;height:40px;border-radius:12px;cursor:pointer;font-size:1.1rem}
@media(max-width:900px){
.burger{display:grid;place-items:center;margin-left:auto}
.main-nav{position:fixed;inset:66px 0 auto 0;flex-direction:column;background:var(--bg-soft);border-bottom:1px solid var(--line);padding:14px 20px 20px;display:none;box-shadow:var(--shadow-lg)}
.main-nav.open{display:flex}
.main-nav a{width:100%;padding:12px 14px}
}
.hero{position:relative;overflow:hidden;color:#fff;background:var(--grad)}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(700px 320px at 85% -10%,rgba(255,255,255,.28),transparent 60%),radial-gradient(500px 260px at 8% 110%,rgba(0,0,0,.22),transparent 60%)}
.hero-in{position:relative;z-index:1;padding:74px 0 66px}
.hero h1{font-size:clamp(1.9rem,4.6vw,3.3rem);line-height:1.14;letter-spacing:-.02em;max-width:20ch}
.hero p.lede{margin-top:16px;font-size:1.12rem;max-width:62ch;opacity:.94}
.hero .chips{margin-top:24px;display:flex;flex-wrap:wrap;gap:10px}
.chip{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.35);color:#fff;padding:8px 15px;border-radius:999px;font-size:.88rem;font-weight:600}
.chip:hover{background:rgba(255,255,255,.28);text-decoration:none}
.crumbs{font-size:.86rem;color:var(--ink-soft);padding:16px 0 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"›";margin-right:6px;color:var(--ink-soft)}
.crumbs a{color:var(--ink-soft)}
.crumbs [aria-current]{color:var(--ink);font-weight:600}
.layout{display:grid;grid-template-columns:1fr 290px;gap:44px;padding:26px 0 70px}
@media(max-width:1020px){.layout{grid-template-columns:1fr}}
.toc{position:sticky;top:92px;align-self:start;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);max-height:calc(100vh - 120px);overflow:auto}
.toc h2{font-size:.82rem;text-transform:uppercase;letter-spacing:.1em;color:var(--ink-soft);margin-bottom:10px}
.toc a{display:block;color:var(--ink-soft);font-size:.9rem;padding:5px 0 5px 12px;border-left:2px solid var(--line)}
.toc a:hover,.toc a.on{color:var(--brand);border-color:var(--brand);text-decoration:none}
@media(max-width:1020px){.toc{position:static;max-height:none}}
article{min-width:0}
.a-head h1{font-size:clamp(1.75rem,3.6vw,2.6rem);line-height:1.2;letter-spacing:-.02em;margin:14px 0 10px}
.meta{display:flex;flex-wrap:wrap;gap:14px;color:var(--ink-soft);font-size:.86rem;margin-bottom:22px}
.answer{background:linear-gradient(120deg,color-mix(in srgb,var(--brand) 10%,var(--card)),color-mix(in srgb,var(--brand-2) 9%,var(--card)));border:1px solid color-mix(in srgb,var(--brand) 35%,var(--line));border-left:5px solid var(--brand);border-radius:var(--radius-s);padding:18px 20px;margin:6px 0 28px}
.answer strong{color:var(--brand)}
h2{font-size:1.5rem;margin:44px 0 14px;letter-spacing:-.01em;display:flex;align-items:center;gap:10px}
article h2::before{content:"";width:9px;height:24px;border-radius:5px;background:var(--grad);flex:none}
h3{font-size:1.16rem;margin:28px 0 10px}
p{margin:0 0 16px}
.lead{font-size:1.1rem}
ul.tick,ol.num{margin:0 0 18px 0;padding-left:4px;list-style:none}
ul.tick li,ol.num li{position:relative;padding:7px 0 7px 30px;border-bottom:1px dashed var(--line)}
ul.tick li::before{content:"✦";position:absolute;left:4px;color:var(--brand)}
ol.num{counter-reset:n}
ol.num li::before{counter-increment:n;content:counter(n);position:absolute;left:0;top:8px;width:21px;height:21px;background:var(--grad);color:#fff;font-size:.72rem;font-weight:700;border-radius:7px;display:grid;place-items:center}
.tbl-wrap{overflow-x:auto;margin:6px 0 24px;border:1px solid var(--line);border-radius:var(--radius-s);box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;background:var(--card);font-size:.93rem;min-width:560px}
caption{caption-side:top;text-align:left;font-weight:700;padding:12px 16px;background:var(--card);border-bottom:1px solid var(--line)}
th{background:color-mix(in srgb,var(--brand) 9%,var(--card));text-align:left;padding:11px 16px;font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft);white-space:nowrap}
td{padding:11px 16px;border-top:1px solid var(--line);vertical-align:top}
tr:hover td{background:color-mix(in srgb,var(--brand) 4%,transparent)}
.quiz-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px;margin:10px 0 28px}
.q-progress{height:8px;background:var(--line);border-radius:99px;overflow:hidden;margin-bottom:18px}
.q-progress i{display:block;height:100%;width:0;background:var(--grad);transition:width .35s}
.q-q{font-weight:700;font-size:1.1rem;margin-bottom:14px}
.q-opts{display:grid;gap:10px}
.q-opt{text-align:left;background:var(--bg);border:1.5px solid var(--line);color:var(--ink);padding:12px 16px;border-radius:12px;cursor:pointer;font-size:.98rem;font-family:inherit;transition:.18s}
.q-opt:hover{border-color:var(--brand);transform:translateY(-1px)}
.q-opt.ok{background:color-mix(in srgb,var(--ok) 14%,var(--card));border-color:var(--ok)}
.q-opt.bad{background:color-mix(in srgb,var(--bad) 12%,var(--card));border-color:var(--bad)}
.q-opt:disabled{cursor:default}
.q-exp{display:none;margin-top:12px;font-size:.92rem;color:var(--ink-soft);background:var(--bg);border-radius:10px;padding:12px 14px}
.q-exp.show{display:block}
.q-foot{display:flex;justify-content:space-between;align-items:center;margin-top:18px}
.q-count{color:var(--ink-soft);font-size:.88rem}
.q-next{background:var(--grad);color:#fff;border:0;padding:11px 26px;border-radius:12px;font-weight:700;cursor:pointer;font-family:inherit;font-size:.95rem}
.q-next:disabled{opacity:.45;cursor:default}
.q-result{text-align:center;padding:10px 0}
.q-result .score{font-size:2.6rem;font-weight:700;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
details{border:1px solid var(--line);border-radius:var(--radius-s);background:var(--card);margin-bottom:10px;overflow:hidden}
summary{cursor:pointer;padding:15px 18px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::after{content:"+";color:var(--brand);font-size:1.25rem;font-weight:700}
details[open] summary::after{content:"–"}
details .fa-a{padding:0 18px 16px;color:var(--ink-soft)}
details .fa-a p{margin-bottom:10px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px;margin:18px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.2s;display:flex;flex-direction:column;color:var(--ink)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);text-decoration:none}
.card img{aspect-ratio:16/9;object-fit:cover;width:100%}
.card .c-b{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.card h3{margin:0;font-size:1.02rem}
.card h3 a{color:var(--ink)}
.card p{font-size:.88rem;color:var(--ink-soft);margin:0;flex:1}
.card .c-tag{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--brand)}
.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:40px 0 0}
@media(max-width:640px){.prevnext{grid-template-columns:1fr}}
.pn{border:1px solid var(--line);background:var(--card);border-radius:var(--radius-s);padding:16px 18px;display:block;box-shadow:var(--shadow)}
.pn span{display:block;font-size:.76rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft)}
.pn b{color:var(--ink)}
.pn:hover{text-decoration:none;border-color:var(--brand)}
.pn.next{text-align:right}
.sec{padding:64px 0}
.sec-h{margin-bottom:26px}
.sec-h h2{margin:0}
.sec-h p{color:var(--ink-soft);max-width:60ch;margin-top:6px}
.stats-band{background:var(--grad);color:#fff;border-radius:var(--radius);padding:34px;display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:22px;text-align:center}
.stats-band b{font-size:2rem;display:block}
.stats-band span{opacity:.9;font-size:.9rem}
.hub-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:18px}
.hub-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:.2s;color:var(--ink);display:block}
.hub-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);text-decoration:none}
.hub-card .ico{font-size:1.7rem}
.hub-card h3{margin:10px 0 6px;font-size:1.08rem}
.hub-card p{color:var(--ink-soft);font-size:.9rem;margin:0}
.hub-card .n{display:inline-block;margin-top:12px;font-size:.78rem;font-weight:700;color:var(--brand)}
.site-foot{border-top:1px solid var(--line);background:var(--bg-soft);padding:52px 0 30px;margin-top:30px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:34px}
@media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}
.foot-grid h4{font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px}
.foot-grid a{display:block;color:var(--ink-soft);font-size:.9rem;padding:4px 0}
.foot-note{margin-top:36px;padding-top:20px;border-top:1px solid var(--line);color:var(--ink-soft);font-size:.84rem}
.hero-img{border-radius:var(--radius);box-shadow:var(--shadow-lg);margin:0 0 28px;width:100%}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:6px}
.skip{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;z-index:99;border-radius:0 0 10px 0}
.skip:focus{left:0}

/* ---- Cookie consent banner (Wave 1, H6) ---- */
.cookie-bar{position:fixed;left:0;right:0;bottom:0;z-index:90;background:var(--card);border-top:1.5px solid var(--line);box-shadow:0 -8px 30px rgba(0,0,0,.18);transform:translateY(110%);transition:transform .4s ease;padding:14px 0}
.cookie-bar.show{transform:translateY(0)}
.cookie-bar.hide{transform:translateY(110%)}
.cookie-in{max-width:1080px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.cookie-in p{margin:0;font-size:.92rem;color:var(--ink-soft);flex:1;min-width:260px}
.cookie-in a{color:var(--brand);font-weight:600}
.cookie-btns{display:flex;gap:10px}
.cookie-btns button{padding:10px 22px;border-radius:10px;font-weight:700;font-size:.92rem;cursor:pointer;border:1.5px solid var(--line);background:transparent;color:var(--ink);font-family:inherit}
.cookie-ok{background:var(--grad)!important;color:#fff!important;border:0!important}
.cookie-no:hover{border-color:var(--brand);color:var(--brand)}
@media (prefers-reduced-motion:reduce){.cookie-bar{transition:none}}

/* Wave 3: interactive breadcrumbs */
.crumb-dd{position:relative;display:inline-block}
.crumb-dd>summary{cursor:pointer;list-style:none;color:var(--ink-soft);font-weight:600;border:1px solid transparent;border-radius:8px;padding:1px 6px;user-select:none}
.crumb-dd>summary::-webkit-details-marker{display:none}
.crumb-dd>summary:hover,.crumb-dd[open]>summary{color:var(--ink);background:var(--card);border-color:var(--line)}
.crumb-menu{position:absolute;top:calc(100% + 6px);left:0;z-index:70;min-width:230px;max-width:300px;background:var(--card);border:1.5px solid var(--line);border-radius:14px;box-shadow:var(--shadow-lg);padding:8px;display:flex;flex-direction:column;max-height:340px;overflow:auto}
.crumb-menu a{color:var(--ink-soft);font-size:.9rem;font-weight:600;padding:8px 10px;border-radius:9px}
.crumb-menu a:hover{color:var(--ink);background:var(--bg);text-decoration:none}

/* Wave 3: link-list notes + recommendation engine */
.link-list li{margin-bottom:8px}
.ll-note{color:var(--ink-soft);font-size:.92rem}
.reco-box{margin:26px 0 6px;border:1.5px solid var(--line);border-radius:16px;background:var(--card);padding:18px 20px}
.reco-box h2{margin:0 0 10px;font-size:1.25rem}
.reco-box ul{list-style:none;display:grid;gap:8px}
.reco-box a{font-weight:600}
.reco-box .r-tag{color:var(--ink-soft);font-size:.85rem}

/* Wave 3.5: knowledge panel + chips */
.kp{display:grid;grid-template-columns:280px 1fr;gap:22px;border:1.5px solid var(--line);border-radius:18px;background:var(--card);padding:18px;margin:20px 0;box-shadow:var(--shadow-lg)}
.kp-img img{border-radius:12px;width:100%;height:auto;display:block}
.kp-short{font-size:1.05rem;font-weight:600;margin:0 0 12px}
.kp-table{width:100%;border-collapse:collapse;font-size:.9rem}
.kp-table th{text-align:left;color:var(--ink-soft);font-weight:600;padding:6px 10px 6px 0;vertical-align:top;white-space:nowrap}
.kp-table td{padding:6px 0;vertical-align:top}
.kp-table tr{border-bottom:1px solid var(--line)}
.kg-chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-block;border:1.5px solid var(--line);border-radius:999px;padding:5px 13px;background:var(--card);font-size:.9rem}
.chip a{font-weight:600;text-decoration:none}
@media(max-width:760px){.kp{grid-template-columns:1fr}}

.foot-h{font-size:1rem;font-weight:700;margin:0 0 .5rem;color:var(--ink)}