/* ==========================================================================
   Kstych.com — site design system (light editorial)
   2026 redesign · scoped to marketing/profile/policy pages
   ========================================================================== */

:root{
  --bg:#ffffff;
  --bg-soft:#f6f7f9;
  --bg-soft-2:#eef0f4;
  --ink-bg:#101216;          /* dark section background */
  --ink-bg-2:#171a20;

  --ink:#15171c;             /* primary text */
  --ink-2:#3b4150;           /* secondary text */
  --muted:#6b7280;           /* muted text */
  --line:#e7e9ee;            /* hairlines */
  --line-2:#d8dbe2;

  --brand:#ffc62b;           /* Kstych yellow */
  --brand-strong:#f5b400;
  --brand-ink:#1a1b21;       /* text on yellow */
  --violet:#5e03db;
  --violet-soft:#efe6ff;
  --teal:#0fb9a6;
  --teal-soft:#dcf6f1;

  --radius:18px;
  --radius-sm:12px;
  --radius-lg:28px;
  --shadow-sm:0 1px 2px rgba(16,18,22,.05), 0 1px 1px rgba(16,18,22,.04);
  --shadow:0 18px 40px -24px rgba(16,18,22,.28), 0 2px 8px -4px rgba(16,18,22,.12);
  --shadow-lg:0 40px 80px -40px rgba(16,18,22,.45);

  --container:1180px;
  --font-sans:'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  --font-display:'Space Grotesk', var(--font-sans);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--bg);
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.08;letter-spacing:-.02em;margin:0;color:var(--ink)}
p{margin:0 0 1em}
::selection{background:var(--brand);color:var(--brand-ink)}

/* ----- layout helpers ----- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:24px}
.section{padding:96px 0}
.section--tight{padding:64px 0}
.section--soft{background:var(--bg-soft)}
.section--dark{background:var(--ink-bg);color:#e8eaef}
.section--dark h1,.section--dark h2,.section--dark h3{color:#fff}
.center{text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-sans);font-weight:600;font-size:12.5px;
  letter-spacing:.14em;text-transform:uppercase;color:var(--muted);
  margin:0 0 20px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand-strong);border-radius:2px}
.eyebrow--center{justify-content:center}
.section__head{max-width:720px;margin:0 0 56px}
.section__head--center{margin-inline:auto;text-align:center}
.section__head h2{font-size:clamp(30px,4vw,46px)}
.section__head p{margin-top:18px;color:var(--ink-2);font-size:19px}

/* ----- buttons ----- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-family:var(--font-sans);font-weight:600;font-size:15px;
  padding:14px 24px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--brand);color:var(--brand-ink);box-shadow:0 10px 24px -12px rgba(245,180,0,.8)}
.btn--primary:hover{background:var(--brand-strong)}
.btn--dark{background:var(--ink);color:#fff}
.btn--dark:hover{background:#000}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn--ghost:hover{border-color:var(--ink);background:#fff}
.section--dark .btn--ghost{color:#fff;border-color:rgba(255,255,255,.28)}
.section--dark .btn--ghost:hover{border-color:#fff;background:rgba(255,255,255,.06)}
.btn .arr{transition:transform .18s ease}
.btn:hover .arr{transform:translateX(3px)}

/* ==========================================================================
   Header / nav
   ========================================================================== */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.82);backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid transparent;transition:border-color .25s ease, box-shadow .25s ease}
.site-header.is-scrolled{border-color:var(--line);box-shadow:var(--shadow-sm)}
.nav{display:flex;align-items:center;gap:32px;height:74px}
.nav__logo{display:flex;align-items:center}
.nav__logo img{height:34px;width:auto}
.nav__links{display:flex;align-items:center;gap:30px;margin-left:8px}
.nav__links a{font-size:15px;font-weight:500;color:var(--ink-2);transition:color .15s ease}
.nav__links a:hover{color:var(--ink)}
.nav__spacer{flex:1}
.nav__actions{display:flex;align-items:center;gap:14px}
.nav__login{font-size:15px;font-weight:600;color:var(--ink)}
.nav__login:hover{color:var(--violet)}
.nav__toggle{display:none;background:none;border:0;cursor:pointer;width:42px;height:42px;border-radius:10px;align-items:center;justify-content:center}
.nav__toggle span,.nav__toggle span::before,.nav__toggle span::after{content:"";display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;position:relative;transition:transform .2s ease, opacity .2s ease}
.nav__toggle span::before{position:absolute;top:-6px}
.nav__toggle span::after{position:absolute;top:6px}

@media (max-width:900px){
  .nav__toggle{display:inline-flex}
  .nav__links,.nav__actions .btn{display:none}
  .nav__links{position:fixed;inset:74px 0 auto 0;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 0;box-shadow:var(--shadow);transform:translateY(-12px);opacity:0;pointer-events:none;transition:opacity .2s ease, transform .2s ease}
  .nav.is-open .nav__links{display:flex;opacity:1;transform:none;pointer-events:auto}
  .nav__links a{padding:14px 24px;font-size:16px;border-bottom:1px solid var(--line)}
  .nav__login{margin-left:auto}
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{position:relative;overflow:hidden;padding:84px 0 72px}
.hero__bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero__bg::before{content:"";position:absolute;top:-220px;right:-120px;width:560px;height:560px;background:radial-gradient(circle at center, rgba(255,198,43,.55), rgba(255,198,43,0) 62%);filter:blur(8px)}
.hero__bg::after{content:"";position:absolute;bottom:-260px;left:-160px;width:560px;height:560px;background:radial-gradient(circle at center, rgba(94,3,219,.16), rgba(94,3,219,0) 64%)}
.hero__grid{position:absolute;inset:0;z-index:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:radial-gradient(circle at 50% 28%, #000 0%, transparent 72%);mask-image:radial-gradient(circle at 50% 28%, #000 0%, transparent 72%);opacity:.5}
.hero .container{position:relative;z-index:1}
.hero__inner{max-width:880px}
.hero h1{font-size:clamp(38px,6.2vw,72px);letter-spacing:-.03em}
.hero h1 .hl{background:linear-gradient(transparent 58%, rgba(255,198,43,.85) 58%);-webkit-box-decoration-break:clone;box-decoration-break:clone;padding:0 .04em}
.hero__lead{font-size:clamp(18px,2.2vw,22px);color:var(--ink-2);max-width:660px;margin:26px 0 34px}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px}
.hero__meta{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:42px;color:var(--muted);font-size:14.5px;font-weight:500}
.hero__meta span{display:inline-flex;align-items:center;gap:8px}
.hero__meta span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--teal)}

/* ----- stat bar ----- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.stats__item{background:#fff;padding:30px 26px}
.stats__num{font-family:var(--font-display);font-weight:600;font-size:clamp(30px,3.4vw,42px);letter-spacing:-.02em;color:var(--ink)}
.stats__num b{color:var(--violet);font-weight:600}
.stats__label{margin-top:6px;color:var(--muted);font-size:14.5px}
@media (max-width:720px){.stats{grid-template-columns:repeat(2,1fr)}}

/* ==========================================================================
   Product / solution cards
   ========================================================================== */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cards--3{grid-template-columns:repeat(3,1fr)}
@media (max-width:1000px){.cards,.cards--3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.cards,.cards--3{grid-template-columns:1fr}}
.card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px 28px;transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;overflow:hidden}
.card::after{content:"";position:absolute;left:0;top:0;height:3px;width:100%;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .25s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-2)}
.card:hover::after{transform:scaleX(1)}
.card__icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:var(--violet-soft);margin-bottom:18px}
.card__icon img{width:26px;height:26px;opacity:.9}
.card__icon--teal{background:var(--teal-soft)}
.card__icon--brand{background:#fff3d1}
.card h3{font-size:19px;margin-bottom:8px}
.card p{margin:0;color:var(--ink-2);font-size:15px;line-height:1.6}
.card__tag{display:inline-block;margin-top:14px;font-size:12px;font-weight:600;letter-spacing:.04em;color:var(--muted);text-transform:uppercase}

/* ==========================================================================
   Capability columns (dark)
   ========================================================================== */
.caps{display:grid;grid-template-columns:repeat(4,1fr);gap:34px}
@media (max-width:1000px){.caps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.caps{grid-template-columns:1fr}}
.cap__no{font-family:var(--font-display);font-size:14px;color:var(--brand);font-weight:600;letter-spacing:.1em}
.cap h3{font-size:20px;margin:14px 0 10px;color:#fff}
.cap p{color:#aeb4c0;font-size:15px;margin:0 0 14px}
.cap ul{list-style:none;margin:0;padding:0}
.cap li{position:relative;padding-left:22px;color:#cdd2dc;font-size:14.5px;margin-bottom:8px}
.cap li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;border:2px solid var(--brand)}

/* ==========================================================================
   Feature rows (alternating)
   ========================================================================== */
.frow{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.frow + .frow{margin-top:88px}
.frow--rev .frow__media{order:-1}
@media (max-width:860px){.frow{grid-template-columns:1fr;gap:34px}.frow--rev .frow__media{order:0}}
.frow h3{font-size:clamp(24px,3vw,34px);margin-bottom:16px}
.frow h3 span{color:var(--violet)}
.frow__lead{color:var(--ink-2);font-size:18px;margin-bottom:22px}
.flist{list-style:none;margin:0;padding:0}
.flist li{position:relative;padding-left:30px;margin-bottom:12px;color:var(--ink-2);font-size:16px}
.flist li::before{content:"";position:absolute;left:0;top:3px;width:18px;height:18px;border-radius:50%;background:var(--brand);box-shadow:inset 0 0 0 5px #fff, inset 0 0 0 6px var(--brand-strong)}
.frow__media{position:relative}
.frow__media img{border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);background:#fff}
.frow__media--plain img{border:0;box-shadow:none}

/* feature chips (framework keywords) */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.chip{font-size:13.5px;font-weight:500;color:var(--ink-2);background:var(--bg-soft);border:1px solid var(--line);border-radius:999px;padding:7px 14px}

/* ==========================================================================
   Profile / split
   ========================================================================== */
.split{display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:start}
@media (max-width:860px){.split{grid-template-columns:1fr;gap:34px}}
.lead-text{font-size:19px;color:var(--ink-2)}
.deflist{display:grid;grid-template-columns:1fr 1fr;gap:24px 32px;margin-top:8px}
@media (max-width:600px){.deflist{grid-template-columns:1fr}}
.deflist dt{font-family:var(--font-display);font-weight:600;font-size:15px;color:var(--ink)}
.deflist dd{margin:4px 0 0;color:var(--muted);font-size:15px}

/* footprint / reach */
.reach{display:flex;flex-wrap:wrap;gap:12px}
.reach span{border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:14.5px;font-weight:500;color:var(--ink-2);background:#fff}
.reach span b{color:var(--violet)}

/* ==========================================================================
   CTA band
   ========================================================================== */
.cta{position:relative;overflow:hidden;background:var(--ink-bg);color:#fff;border-radius:var(--radius-lg);padding:64px 56px;text-align:center}
.cta::before{content:"";position:absolute;top:-160px;left:50%;transform:translateX(-50%);width:600px;height:360px;background:radial-gradient(circle at center, rgba(255,198,43,.30), transparent 70%)}
.cta>*{position:relative;z-index:1}
.cta h2{font-size:clamp(28px,4vw,44px);color:#fff}
.cta p{color:#b9bfca;font-size:19px;max-width:560px;margin:18px auto 30px}
.cta__row{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;align-items:center}
.cta__contact{margin-top:26px;color:#cdd2dc;font-size:15px}
.cta__contact a{color:#fff;font-weight:600}
@media (max-width:600px){.cta{padding:48px 26px}}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer{background:#0d0f13;color:#aeb4c0;padding:72px 0 36px;font-size:15px}
.site-footer a{color:#aeb4c0;transition:color .15s ease}
.site-footer a:hover{color:#fff}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
@media (max-width:780px){.footer__grid{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.footer__grid{grid-template-columns:1fr}}
.footer__brand h3{font-family:var(--font-display);color:#fff;font-size:22px;margin-bottom:12px}
.footer__brand p{font-size:14px;line-height:1.6;max-width:320px}
.footer__col h4{font-family:var(--font-sans);text-transform:uppercase;letter-spacing:.1em;font-size:12px;color:#6e7682;font-weight:700;margin:0 0 16px}
.footer__col ul{list-style:none;margin:0;padding:0}
.footer__col li{margin-bottom:11px;font-size:14.5px}
.footer__social{display:flex;gap:12px;margin-top:18px}
.footer__social a{width:38px;height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.12);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;color:#cdd2dc}
.footer__social a:hover{border-color:var(--brand);color:var(--brand)}
.footer__bar{margin-top:52px;padding-top:24px;border-top:1px solid rgba(255,255,255,.08);display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;font-size:13.5px;color:#6e7682}

/* ==========================================================================
   Document / prose pages (terms, privacy, about, contact, purchase)
   ========================================================================== */
.page-hero{padding:72px 0 40px;border-bottom:1px solid var(--line);background:var(--bg-soft)}
.page-hero h1{font-size:clamp(32px,5vw,52px)}
.page-hero p{margin-top:14px;color:var(--ink-2);font-size:18px}
.prose{max-width:820px;margin:0 auto;padding:64px 0}
.prose h2,.prose h5{font-family:var(--font-display);font-size:22px;margin:36px 0 14px;color:var(--ink)}
.prose h5:first-child,.prose h2:first-child{margin-top:0}
.prose p{color:var(--ink-2);margin:0 0 18px;line-height:1.75}
.prose b,.prose strong{color:var(--ink)}
.prose pre{font-family:var(--font-sans)!important;white-space:pre-wrap;word-wrap:break-word;width:100%!important;color:var(--ink-2);line-height:1.75;margin:0;font-size:16px}
.prose pre h5{font-family:var(--font-display)!important}
.contact-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:8px}
@media (max-width:760px){.contact-cards{grid-template-columns:1fr}}
.contact-card{border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.contact-card h3{font-size:18px;margin-bottom:10px}
.contact-card p{margin:0;color:var(--ink-2);font-size:15px;line-height:1.7}
.contact-card a{color:var(--violet);font-weight:600}

/* ==========================================================================
   Reveal-on-scroll
   ========================================================================== */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s cubic-bezier(.2,.6,.2,1), transform .6s cubic-bezier(.2,.6,.2,1)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .btn:hover{transform:none}
}