/* ==========================================================================
   TRENDFUEL — site design system (yellow-forward, 2026)
   ========================================================================== */
:root{
  --yellow:#ffc400; --yellow-600:#e6a800; --yellow-soft:#fff4cc; --yellow-tint:#fffaf0;
  --ink:#0e1113; --ink-800:#15191c; --ink-700:#1d2227; --ink-500:#3a4047;
  --paper:#ffffff; --paper-2:#f7f7f4; --paper-3:#eeeeea;
  --line:#e6e6e1; --line-dark:#272c31;
  --text:#13171a; --muted:#586068; --muted-2:#8a9099; --muted-dark:#9aa3ad;
  --blue:#1b4dff; --green:#1f9d57; --amber:#cf8e00; --red:#e5484d;
  --disp:'Rubik','Helvetica Neue',Arial,sans-serif;
  --ui:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --mono:'Roboto Mono',ui-monospace,Menlo,Consolas,monospace;
  --wrap:1180px; --r:10px; --r-lg:16px;
  --shadow:0 1px 2px rgba(15,17,19,.04),0 8px 30px rgba(15,17,19,.06);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--text);font-family:var(--ui);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--text);text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono)}
h1,h2,h3,h4{font-family:var(--disp);font-weight:700;line-height:1.1;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2.2rem,5vw,3.6rem)}
h2{font-size:clamp(1.7rem,3.5vw,2.5rem)}
h3{font-size:1.3rem}
p{margin:0 0 1em}
.eyebrow{font-family:var(--ui);font-weight:700;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0 0 14px}
.eyebrow.on-dark{color:var(--yellow)}
.lead{font-size:1.18rem;color:var(--muted)}
.center{text-align:center}
.mt0{margin-top:0}.mb0{margin-bottom:0}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--ui);font-weight:600;font-size:15px;
  padding:13px 22px;border-radius:8px;border:2px solid transparent;cursor:pointer;transition:.15s;white-space:nowrap}
.btn-primary{background:var(--yellow);color:var(--ink);border-color:var(--yellow)}
.btn-primary:hover{background:var(--yellow-600);border-color:var(--yellow-600)}
.btn-dark{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-dark:hover{background:#000}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink)}
.btn-ghost.on-dark{color:#fff;border-color:rgba(255,255,255,.25)}
.btn-ghost.on-dark:hover{border-color:#fff}
.btn .arrow{transition:transform .15s}
.btn:hover .arrow{transform:translateX(3px)}
.btn-lg{padding:16px 28px;font-size:16px}

/* ---------- header / nav ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:28px;height:70px}
.brand{display:flex;align-items:center;flex:0 0 auto}
.brand img{height:26px}
.nav-links{display:flex;align-items:center;gap:24px;margin-left:8px}
.nav-links a{font-size:15px;font-weight:500;color:var(--ink-500)}
.nav-links a:hover{color:var(--ink)}
.nav-spacer{flex:1}
.nav-cta{display:flex;align-items:center;gap:12px}
.has-sub{position:relative}
.has-sub>span{display:inline-flex;align-items:center;gap:5px;cursor:pointer;font-size:15px;font-weight:500;color:var(--ink-500)}
.has-sub>span::after{content:"";width:6px;height:6px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);margin-top:-3px;opacity:.6}
.submenu{position:absolute;top:calc(100% + 10px);left:-12px;min-width:240px;background:#fff;border:1px solid var(--line);
  border-radius:12px;box-shadow:var(--shadow);padding:8px;opacity:0;visibility:hidden;transform:translateY(6px);transition:.15s}
.has-sub:hover .submenu,.has-sub:focus-within .submenu{opacity:1;visibility:visible;transform:none}
.submenu a{display:block;padding:9px 12px;border-radius:8px;font-size:14.5px;color:var(--ink-700)}
.submenu a:hover{background:var(--paper-2)}
.submenu a b{display:block;font-weight:600;color:var(--ink)}
.submenu a span{font-size:12.5px;color:var(--muted)}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:4px 0;transition:.2s}
@media(max-width:1000px){
  .nav-links,.nav-cta .btn-ghost{display:none}
  .nav-toggle{display:block}
  .mobile-open .nav-links{display:flex;position:absolute;top:70px;left:0;right:0;flex-direction:column;align-items:flex-start;
    background:#fff;border-bottom:1px solid var(--line);padding:16px 24px;gap:14px}
  .mobile-open .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:6px 0 0 12px;min-width:0}
}

/* ---------- sections ---------- */
.section{padding:84px 0}
.section.tight{padding:56px 0}
.section--paper2{background:var(--paper-2)}
.section--dark{background:var(--ink);color:#fff}
.section--dark h1,.section--dark h2,.section--dark h3{color:#fff}
.section--dark .lead{color:var(--muted-dark)}
.section--ink2{background:var(--ink-800);color:#fff}
.section--yellow{background:var(--yellow)}
.section--yellow .eyebrow{color:var(--ink-500)}
.sec-head{max-width:760px;margin:0 0 42px}
.sec-head.center{margin-left:auto;margin-right:auto}

/* ---------- hero ---------- */
.hero{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;right:-160px;top:-120px;width:540px;height:540px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,196,0,.18),transparent 65%)}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center;padding:92px 0}
.hero h1{color:#fff}
.hero .accent{color:var(--yellow)}
.hero .lead{color:var(--muted-dark);max-width:36ch}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.hero-proof{display:flex;gap:30px;margin-top:38px;flex-wrap:wrap}
.hero-proof .n{font-family:var(--mono);font-size:1.6rem;font-weight:600;color:var(--yellow);line-height:1}
.hero-proof .l{font-size:12.5px;color:var(--muted-dark);margin-top:6px;max-width:16ch}
.hero-visual{background:var(--ink-700);border:1px solid var(--line-dark);border-radius:var(--r-lg);padding:20px}
.hero-pagetitle{padding:70px 0 64px}
.hero-pagetitle .lead{max-width:60ch}
/* hero background crossfade slider */
.hero-slider{position:absolute;inset:0;z-index:0;overflow:hidden}
.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;
  filter:saturate(.92) contrast(1.02);will-change:opacity;animation:heroFade 20s ease-in-out infinite}
.hero-slide:nth-child(2){animation-delay:-10s}
.hero-slider::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(14,17,19,.95) 0%,rgba(14,17,19,.82) 42%,rgba(14,17,19,.58) 100%)}
@keyframes heroFade{0%{opacity:1}40%{opacity:1}50%{opacity:0}90%{opacity:0}100%{opacity:1}}
.hero-inner{position:relative;z-index:2}
.hero::before{z-index:1}
@media(prefers-reduced-motion:reduce){.hero-slide{animation:none}.hero-slide:first-child{opacity:1}}

/* ---------- answer block (GEO) ---------- */
.answer{border-left:4px solid var(--yellow);background:var(--yellow-tint);padding:20px 24px;border-radius:0 12px 12px 0;
  font-size:1.16rem;line-height:1.55;color:var(--ink-700);max-width:70ch}
.section--dark .answer{background:rgba(255,196,0,.08);color:#f3f4f5}

/* ---------- stat band ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line-dark);border-radius:var(--r-lg);overflow:hidden}
.stats .stat{background:var(--ink);padding:30px 24px}
.section--yellow .stats{background:rgba(14,17,19,.12)}
.section--yellow .stats .stat{background:var(--yellow)}
.stat .n{font-family:var(--mono);font-size:2.1rem;font-weight:600;line-height:1;color:var(--yellow)}
.section--yellow .stat .n{color:var(--ink)}
.stat .l{font-size:13px;margin-top:10px;color:var(--muted-dark)}
.section--yellow .stat .l{color:var(--ink-700)}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cards.two{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;transition:.18s;display:flex;flex-direction:column}
.card:hover{border-color:var(--ink);box-shadow:var(--shadow);transform:translateY(-2px)}
.card .k{font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--yellow-600);margin-bottom:12px}
.card h3{margin-bottom:8px}
.card p{color:var(--muted);font-size:15.5px;margin-bottom:18px}
.card .more{margin-top:auto;font-weight:600;font-size:14.5px;color:var(--ink);display:inline-flex;gap:7px;align-items:center}
.card .more .arrow{transition:transform .15s}.card:hover .more .arrow{transform:translateX(3px)}
.card.dark{background:var(--ink-800);border-color:var(--line-dark);color:#fff}
.card.dark p{color:var(--muted-dark)}.card.dark .more{color:var(--yellow)}

/* ---------- steps ---------- */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.step{position:relative;padding-top:54px}
.step::before{counter-increment:s;content:counter(s,decimal-leading-zero);position:absolute;top:0;left:0;
  font-family:var(--mono);font-size:1.1rem;font-weight:600;color:var(--ink);background:var(--yellow);
  width:40px;height:40px;border-radius:9px;display:flex;align-items:center;justify-content:center}
.step h3{font-size:1.12rem}
.step p{color:var(--muted);font-size:15px;margin:0}

/* ---------- feature rows ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center}
.split.narrow{gap:40px}
.checks{list-style:none;padding:0;margin:0}
.checks li{position:relative;padding:9px 0 9px 32px;border-bottom:1px solid var(--line);font-size:15.5px}
.checks li::before{content:"";position:absolute;left:0;top:14px;width:18px;height:18px;border-radius:50%;
  background:var(--yellow);background-image:linear-gradient(135deg,transparent 45%,var(--ink) 45%,var(--ink) 55%,transparent 55%)}
.checks li::before{content:"\2713";color:var(--ink);background:var(--yellow);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:bold;top:11px}
.section--dark .checks li{border-color:var(--line-dark)}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto;border-top:1px solid var(--line)}
.section--dark .faq{border-color:var(--line-dark)}
.faq details{border-bottom:1px solid var(--line)}
.section--dark .faq details{border-color:var(--line-dark)}
.faq summary{cursor:pointer;list-style:none;padding:22px 40px 22px 0;position:relative;font-family:var(--disp);font-weight:600;font-size:1.12rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:6px;top:18px;font-size:1.5rem;color:var(--yellow-600);font-weight:400}
.faq details[open] summary::after{content:"\2212"}
.faq .a{padding:0 40px 22px 0;color:var(--muted);max-width:70ch}
.section--dark .faq .a{color:var(--muted-dark)}

/* ---------- CTA band ---------- */
.cta-band{background:var(--yellow);border-radius:var(--r-lg)}
.cta-band .inner{display:grid;grid-template-columns:1.4fr auto;gap:30px;align-items:center;padding:48px}
.cta-band h2{margin:0 0 8px;color:var(--ink)}
.cta-band p{margin:0;color:var(--ink-700);font-size:1.05rem}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- breadcrumb ---------- */
.crumb{font-size:13px;color:var(--muted);padding:18px 0 0}
.crumb a{color:var(--muted)}.crumb a:hover{color:var(--ink)}

/* ---------- forms ---------- */
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:30px;box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;font-weight:600;color:var(--ink-700)}
.field input,.field select,.field textarea{font-family:var(--ui);font-size:15px;padding:12px 14px;border:1.5px solid var(--line);
  border-radius:8px;background:#fff;color:var(--text)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--ink)}
.field textarea{min-height:110px;resize:vertical}
.form-note{font-size:12.5px;color:var(--muted-2);margin-top:6px}
.placeholder-tag{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;
  color:#7a5a00;background:var(--yellow-soft);border:1px solid var(--yellow);border-radius:5px;padding:2px 7px;margin-left:6px}
.success{display:none;background:var(--yellow-tint);border:1px solid var(--yellow);border-radius:10px;padding:18px 20px;color:var(--ink-700)}

/* ---------- misc ---------- */
.kpis-inline{display:flex;gap:28px;flex-wrap:wrap;margin:24px 0}
.kpis-inline .n{font-family:var(--mono);font-weight:600;font-size:1.4rem;color:var(--ink)}
.kpis-inline .l{font-size:12.5px;color:var(--muted)}
.badge{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;
  color:var(--ink-700);background:var(--yellow-soft);border:1px solid var(--yellow);border-radius:999px;padding:5px 12px}
.tagrow{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.tag{font-size:13px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:5px 13px}
.prose{max-width:72ch}
.prose h2{margin-top:1.6em}
.prose h3{margin-top:1.4em}
.prose ul{padding-left:1.1em}.prose li{margin:.4em 0}
.note-box{background:var(--paper-2);border:1px solid var(--line);border-left:4px solid var(--yellow);border-radius:0 10px 10px 0;padding:18px 22px;margin:1.4em 0}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--muted-dark);padding:64px 0 30px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px;border-bottom:1px solid var(--line-dark)}
.foot-brand img{height:26px;margin-bottom:16px}
.foot-brand p{font-size:14px;max-width:34ch}
.foot-col h4{font-family:var(--ui);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:#fff;margin:0 0 16px}
.foot-col a{display:block;color:var(--muted-dark);font-size:14.5px;padding:5px 0}
.foot-col a:hover{color:var(--yellow)}
.foot-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;font-size:13px;color:var(--muted-2)}
.foot-bottom a{color:var(--muted-2)}.foot-bottom a:hover{color:#fff}

/* ---------- responsive ---------- */
@media(max-width:920px){
  .hero-inner,.split{grid-template-columns:1fr;gap:34px}
  .hero-visual{order:-1}
  .cards,.cards.two{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .form-grid{grid-template-columns:1fr}
  .cta-band .inner{grid-template-columns:1fr;padding:32px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .section{padding:60px 0}
}
@media(max-width:560px){
  .stats,.steps,.foot-grid{grid-template-columns:1fr}
  body{font-size:16px}
}