/* ===========================================================
   Bing Homepage Quiz — site design system (v4, full rewrite)
   Identity: friendly trivia/quiz. Bing blue primary + the
   four "QUIZ" logo colors used as a signature accent.
   =========================================================== */
:root{
  --blue:#0078d4; --blue-dark:#005a9e; --blue-deep:#00457e;
  --ink:#16202c; --body:#3d4754; --muted:#6b7682;
  --bg:#ffffff; --soft:#f4f7fb; --line:#e4e9f0;
  --cta:#ffb900;
  --q-yellow:#F7B500; --q-pink:#FF2D55; --q-teal:#1FB6A6; --q-green:#7FB800;
  --radius:14px; --radius-sm:10px;
  --shadow-sm:0 1px 2px rgba(16,32,44,.05), 0 4px 14px rgba(16,32,44,.06);
  --shadow-md:0 12px 34px rgba(16,32,44,.14);
  --maxw:1140px;
  --sans:-apple-system,"Segoe UI",system-ui,Roboto,Helvetica,Arial,sans-serif;
  --display:"Poppins",var(--sans);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--body);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:var(--display);color:var(--ink);line-height:1.2}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--cta);outline-offset:2px;border-radius:6px}

/* ---------------- Header ---------------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.header-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:20px;max-width:var(--maxw);margin:0 auto;padding:10px 22px}
.brand{display:inline-flex;align-items:center;line-height:0}
.brand .brand-logo{height:50px;width:auto;display:block;background:none;padding:0;border-radius:0}
.brand span{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.main-nav{display:flex;align-items:center;gap:2px}
.nav-link{font-family:var(--display);display:inline-block;color:var(--ink);font-weight:600;font-size:.92rem;padding:9px 14px;border-radius:999px;line-height:1;white-space:nowrap;transition:background .15s,color .15s}
.nav-link:hover{background:rgba(255,45,85,.09);color:var(--q-pink);text-decoration:none}
.nav-link.active,.nav-link.active:hover{background:var(--q-pink);color:#fff}
.dropdown-toggle .caret{font-size:.66em;margin-left:3px;opacity:.85}
.nav-item.has-dropdown{position:relative}
.dropdown{position:absolute;top:calc(100% + 10px);left:0;min-width:252px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-md);padding:8px;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .16s ease,transform .16s ease,visibility .16s}
.nav-item.has-dropdown:hover>.dropdown,
.nav-item.has-dropdown:focus-within>.dropdown,
.nav-item.has-dropdown.open>.dropdown{opacity:1;visibility:visible;transform:none}
.dropdown a{display:block;color:var(--body);font-weight:500;font-size:.93rem;padding:10px 14px;border-radius:10px;white-space:nowrap}
.dropdown a:hover{background:var(--soft);color:var(--blue-dark);text-decoration:none}
.nav-toggle{display:none;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);color:var(--ink);font-size:1.25rem;line-height:1;padding:8px 12px;border-radius:10px;cursor:pointer}

/* ---------------- Hero ---------------- */
.hero{background:linear-gradient(135deg,var(--blue) 0%,var(--blue-dark) 58%,var(--blue-deep) 100%);color:#fff;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding:66px 0 76px;padding-inline:max(22px,calc((100% - var(--maxw)) / 2))}
.hero-content{max-width:560px}
.hero h1{font-weight:800;font-size:clamp(2rem,4.6vw,3.05rem);letter-spacing:-.02em;margin:0 0 18px;color:#fff}
.hero .lead{font-size:1.12rem;opacity:.95;margin:0;max-width:48ch}
.hero img{width:100%;border-radius:18px;box-shadow:0 22px 54px rgba(0,0,0,.30)}
.cta-button{display:inline-block;margin-top:26px;background:var(--cta);color:#1b1f24;font-weight:700;padding:13px 28px;border-radius:999px;box-shadow:0 8px 20px rgba(255,185,0,.42);transition:transform .15s ease,box-shadow .15s ease}
.cta-button:hover{transform:translateY(-2px);text-decoration:none;box-shadow:0 12px 26px rgba(255,185,0,.52)}

/* ---------------- Main + sections ---------------- */
main{padding:56px 0;display:block}
main.container{max-width:var(--maxw)}
section{margin-bottom:58px}
section:last-child{margin-bottom:0}
main>h1{font-size:clamp(1.9rem,3.6vw,2.5rem);letter-spacing:-.02em;margin:0 0 14px}
.lead{font-size:1.12rem;color:var(--body)}
section h2{font-size:1.62rem;letter-spacing:-.01em;margin:0 0 24px;padding-bottom:12px;position:relative}
section h2::after{content:"";position:absolute;left:0;bottom:0;width:56px;height:4px;border-radius:4px;background:linear-gradient(90deg,var(--q-yellow),var(--q-pink) 40%,var(--q-teal) 70%,var(--q-green))}

/* ---------------- Cards / grids ---------------- */
.quiz-grid,.category-grid,.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(285px,1fr));gap:24px}
.quiz-card,.category-card,.article-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .18s ease,box-shadow .18s ease}
.quiz-card:hover,.category-card:hover,.article-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}
.quiz-card>img,.category-card>img,.article-card>img{width:100%;aspect-ratio:16/9;object-fit:cover}
.quiz-card h3,.category-card h3,.article-card h3{margin:15px 18px 0;font-size:1.08rem;line-height:1.32}
.quiz-card h3 a,.category-card h3 a,.article-card h3 a{color:var(--ink)}
.quiz-card h3 a:hover,.category-card h3 a:hover,.article-card h3 a:hover{color:var(--blue);text-decoration:none}
.quiz-card p,.category-card p,.article-card p{margin:9px 18px 18px;color:var(--muted);font-size:.94rem;flex:1}
/* signature: rotating QUIZ-color top accent on category cards */
.category-card{border-top:4px solid var(--blue)}
.category-grid .category-card:nth-child(4n+1){border-top-color:var(--q-yellow)}
.category-grid .category-card:nth-child(4n+2){border-top-color:var(--q-pink)}
.category-grid .category-card:nth-child(4n+3){border-top-color:var(--q-teal)}
.category-grid .category-card:nth-child(4n+4){border-top-color:var(--q-green)}

/* ---------------- Article body (inner pages) ---------------- */
.article-body{font-size:1.05rem;max-width:none}
.article-body h2{font-family:var(--display);color:var(--ink);font-size:1.55rem;margin:40px 0 14px}
.article-body h3{font-size:1.2rem;margin:28px 0 10px}
.article-body p{margin:0 0 18px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px}
.article-body li{margin-bottom:8px}
.featured-image,.secondary-image{width:100%;border-radius:var(--radius);box-shadow:var(--shadow-sm);margin:26px 0}
.context-links{background:var(--soft);border:1px solid var(--line);border-left:4px solid var(--blue);padding:14px 18px;border-radius:10px;margin:24px 0;font-size:.96rem}
.context-links a{margin-right:12px;font-weight:500}

/* ---------------- Internal links + FAQ ---------------- */
.internal-links{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin-top:50px}
.internal-links h2{margin-top:0}
.internal-links ul{columns:2;column-gap:34px;list-style:none;margin:0;padding:0}
.internal-links li{margin-bottom:11px;break-inside:avoid}
.faq-section{margin-top:50px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;font-weight:600;color:var(--ink);padding:16px 18px;position:relative;padding-right:46px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);font-size:1.3rem;color:var(--blue);font-weight:400}
.faq-item[open] summary{color:var(--blue)}
.faq-item[open] summary::after{content:"\2212"}
.faq-item p{margin:0;padding:0 18px 16px;color:var(--body)}

/* ---------------- Breadcrumb ---------------- */
.breadcrumb{padding:18px 0 0;font-size:.88rem;color:var(--muted)}
.breadcrumb ol{list-style:none;margin:0;padding:0;display:flex;gap:8px;flex-wrap:wrap}
.breadcrumb a{color:var(--blue)}
.breadcrumb li+li::before{content:"\203A";margin-right:8px;color:#9aa4b0}
.breadcrumb .active{color:var(--muted)}

/* ---------------- Forms / info ---------------- */
.contact-form{max-width:660px;background:var(--soft);border:1px solid var(--line);padding:26px;border-radius:var(--radius);margin:24px 0}
.contact-form label{display:block;font-weight:600;color:var(--ink);margin:14px 0 6px}
.contact-form input,.contact-form textarea{width:100%;padding:12px 13px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff;transition:border-color .15s,box-shadow .15s}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(0,120,212,.15)}
.contact-form textarea{min-height:150px;resize:vertical}
.contact-form .cta-button{margin-top:20px;border:0;cursor:pointer}
.info-card{background:var(--soft);border:1px solid var(--line);border-left:4px solid var(--q-teal);border-radius:var(--radius);padding:18px 22px;margin:18px 0}
.info-card p{margin:6px 0}

/* ---------------- Footer ---------------- */
.site-footer{background:#0c1a2b;color:#c4d0dd;padding:38px 0;margin-top:72px;text-align:center;font-size:.92rem}
.site-footer .container{max-width:var(--maxw)}
.site-footer a{color:#8fc2ff}
.site-footer p{margin:0}
.site-footer p+p{margin-top:12px;font-size:.82rem;color:#8593a3}

/* ---------------- Responsive ---------------- */
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .main-nav{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:2px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow-md);padding:10px 16px 16px}
  .main-nav.open{display:flex}
  .nav-link{font-size:1rem;padding:12px 14px;border-radius:10px}
  .nav-item.has-dropdown{width:100%}
  .dropdown{position:static;min-width:0;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;background:var(--soft);margin:4px 0 6px 12px;padding:6px}
  .dropdown a{font-size:.95rem}
  .hero{grid-template-columns:1fr;gap:30px;padding:46px 0 52px}
  .internal-links ul{columns:1}
}
@media (max-width:560px){
  .header-inner{padding:8px 16px}
  .brand .brand-logo{height:42px}
  .hero h1{font-size:1.85rem}
  main{padding:40px 0}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;scroll-behavior:auto!important}
  .quiz-card:hover,.category-card:hover,.article-card:hover,.cta-button:hover{transform:none}
}

/* AEO/GEO: visible freshness stamp */
.last-updated{display:inline-block;font-size:.82rem;color:var(--muted);background:var(--soft);border:1px solid var(--line);padding:4px 12px;border-radius:999px;margin:0 0 18px}

/* Cookie consent bar (AdSense/GDPR) */
.cookie-bar{position:fixed;left:16px;right:16px;bottom:16px;z-index:200;max-width:760px;margin:0 auto;background:#0c1a2b;color:#e7edf4;border:1px solid #1f3550;border-radius:14px;box-shadow:0 12px 34px rgba(0,0,0,.35);padding:16px 18px;display:flex;gap:16px;align-items:center;flex-wrap:wrap;justify-content:space-between}
.cookie-bar p{margin:0;font-size:.9rem;flex:1;min-width:240px}
.cookie-bar a{color:#8fc2ff}
.cookie-actions{display:flex;gap:10px;align-items:center}
.cookie-link{font-size:.88rem;color:#8fc2ff;align-self:center}
.cookie-accept{background:var(--cta);color:#1b1f24;font-weight:700;border:0;border-radius:999px;padding:10px 22px;cursor:pointer;font:inherit}
.cookie-accept:hover{filter:brightness(1.05)}
@media (max-width:560px){.cookie-bar{flex-direction:column;align-items:stretch;text-align:left}.cookie-actions{justify-content:flex-end}}
.more-quizzes{margin-top:8px}