/* =====================================================================
   pierosestak.cz — sdílený design systém
   Editorial / warm-minimal. Cream + charcoal + safety orange. Inter.
   Pozn.: /zacni-s-ai má vlastní inline styly a tenhle soubor nepoužívá.
   ===================================================================== */

:root{
  /* --- brand paleta (z content strategy) --- */
  --orange:#FF5F15;        /* Safety orange — akcent / CTA */
  --orange-ink:#C4470A;    /* tmavší odstín na text/odkazy (kontrast na krému, AA) */
  --orange-soft:#FCE6D9;   /* jemné pozadí akcentu */
  --orange-line:#F1CBB5;
  --cream:#F4EFE8;         /* hlavní pozadí */
  --cream-2:#EFE7DB;       /* sekundární pozadí */
  --cream-3:#EAE0D1;
  --surface:#FBF8F3;       /* karty / povrch */
  --ink:#26241F;           /* hlavní text (tmavší než #2E2E2C kvůli kontrastu) */
  --ink-2:#2E2E2C;
  --muted:#56534C;         /* sekundární text — čitelný na krému (AA) */
  --faint:#8E8E8A;         /* Warm grey — terciární, jen velký/dekor */
  --line:#E0D6C6;          /* jemné linky */
  --line-2:#EAE2D4;
  --black:#1A1916;

  --maxw:1180px;
  --gut:clamp(20px,5vw,72px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --sh-1:0 1px 2px rgba(38,36,31,.04),0 2px 6px rgba(38,36,31,.05);
  --sh-2:0 6px 18px rgba(38,36,31,.07),0 2px 6px rgba(38,36,31,.04);
  --sh-3:0 22px 50px rgba(38,36,31,.13),0 6px 16px rgba(38,36,31,.06);
}

*{box-sizing:border-box;margin:0;padding:0}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:88px;
}
body{
  background:var(--cream);
  color:var(--ink);
  font-family:"Inter","Inter Display",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  font-optical-sizing:auto;
  font-feature-settings:"cv05" 1,"cv11" 1,"ss01" 1;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--orange-ink);text-decoration:none}
::selection{background:var(--orange);color:#fff}
:focus-visible{outline:2.5px solid var(--orange);outline-offset:3px;border-radius:4px}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gut)}
.wrap-narrow{max-width:760px}

/* ---------- typografie ---------- */
.display{
  font-weight:800;
  letter-spacing:-.035em;
  line-height:.94;
  font-size:clamp(2.9rem,11.5vw,8.4rem);
}
h1,h2,h3,h4{letter-spacing:-.02em;line-height:1.05;font-weight:800;color:var(--ink)}
h2.section-title{font-size:clamp(2rem,5.2vw,3.6rem);letter-spacing:-.03em;line-height:1}
h3{font-size:clamp(1.15rem,2.2vw,1.5rem);font-weight:700;letter-spacing:-.015em}
p{max-width:64ch}
.lead{font-size:clamp(1.12rem,2.1vw,1.45rem);line-height:1.5;color:var(--ink);font-weight:500;letter-spacing:-.01em}
.muted{color:var(--muted)}
strong{font-weight:700;color:var(--ink)}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--orange-ink);
}
.eyebrow::before{content:"";width:22px;height:1.5px;background:var(--orange);display:inline-block}
.eyebrow.no-rule::before{display:none}

/* sekční číslo + label (editorial) */
.sec-head{display:flex;align-items:baseline;gap:18px;margin-bottom:34px;flex-wrap:wrap}
.sec-num{
  font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--faint);
  font-variant-numeric:tabular-nums;flex:none;padding-top:.55em;
}
.sec-kicker{font-size:13px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--orange-ink);margin-bottom:14px}

section{padding:clamp(64px,11vh,140px) 0;position:relative}
section.tight{padding:clamp(48px,7vh,90px) 0}
.rule{height:1px;background:var(--line);border:0}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-weight:600;font-size:15px;letter-spacing:-.01em;
  padding:14px 24px;border-radius:999px;border:1.5px solid transparent;
  cursor:pointer;transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .2s,color .2s,border-color .2s;
  white-space:nowrap;line-height:1;
}
.btn .arr{transition:transform .3s var(--ease)}
.btn:hover .arr{transform:translateX(4px)}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 6px 18px rgba(255,95,21,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(255,95,21,.34)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-2px)}
.btn-sm{padding:10px 18px;font-size:14px}

/* odkaz s animovaným podtržením */
.ul-link{
  position:relative;color:var(--ink);font-weight:600;
  background-image:linear-gradient(var(--orange),var(--orange));
  background-size:0% 2px;background-position:0 100%;background-repeat:no-repeat;
  transition:background-size .35s var(--ease),color .2s;padding-bottom:2px;
}
.ul-link:hover{background-size:100% 2px;color:var(--orange-ink)}
.ul-link .arr{display:inline-block;transition:transform .3s var(--ease)}
.ul-link:hover .arr{transform:translate(3px,-3px)}

/* ---------- NAV ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:80;transition:background .35s var(--ease),box-shadow .35s var(--ease),border-color .35s,backdrop-filter .35s}
.nav .nav-inner{max-width:var(--maxw);margin:0 auto;padding:18px var(--gut);display:flex;align-items:center;justify-content:space-between;gap:20px;transition:padding .3s var(--ease)}
.nav.scrolled{background:rgba(244,239,232,.82);backdrop-filter:saturate(150%) blur(14px);-webkit-backdrop-filter:saturate(150%) blur(14px);border-bottom:1px solid var(--line)}
.nav.scrolled .nav-inner{padding-top:13px;padding-bottom:13px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.02em;font-size:17px;color:var(--ink)}
.brand .mark{width:30px;height:30px;border-radius:50%;background:var(--orange);color:#fff;display:grid;place-items:center;font-size:14px;font-weight:800;flex:none;box-shadow:0 3px 8px rgba(255,95,21,.3)}
.brand .mark img{width:100%;height:100%;border-radius:50%;object-fit:cover}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a:not(.btn){font-size:14.5px;font-weight:500;color:var(--muted);padding:9px 13px;border-radius:999px;transition:color .2s,background .2s}
.nav-links a:not(.btn):hover{color:var(--ink);background:rgba(38,36,31,.05)}
.nav-cta{margin-left:8px}
.navtoggle{display:none;width:44px;height:44px;border:1px solid var(--line);background:var(--surface);border-radius:12px;cursor:pointer;position:relative;flex:none}
.navtoggle span{position:absolute;left:50%;top:50%;width:18px;height:2px;border-radius:2px;background:var(--ink);transform:translate(-50%,-50%);transition:.3s var(--ease)}
.navtoggle span:nth-child(1){transform:translate(-50%,-6px)}
.navtoggle span:nth-child(3){transform:translate(-50%,4px)}
.navtoggle[aria-expanded="true"] span:nth-child(1){transform:translate(-50%,-50%) rotate(45deg)}
.navtoggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.navtoggle[aria-expanded="true"] span:nth-child(3){transform:translate(-50%,-50%) rotate(-45deg)}

@media(max-width:860px){
  .navtoggle{display:block}
  .nav-links{
    position:fixed;inset:72px 0 auto 0;flex-direction:column;align-items:stretch;gap:6px;
    background:var(--cream);border-bottom:1px solid var(--line);padding:18px var(--gut) 26px;
    box-shadow:var(--sh-3);
    transform:translateY(-14px);opacity:0;visibility:hidden;
    transition:transform .3s var(--ease),opacity .22s,visibility .3s;
  }
  .nav-links.open{transform:none;opacity:1;visibility:visible}
  .nav-links a:not(.btn){font-size:17px;padding:13px 14px}
  .nav-cta{margin:8px 0 0;justify-content:center}
}

/* ---------- footer ---------- */
.footer{background:var(--ink);color:#D9D4CA;padding:clamp(60px,10vh,110px) 0 40px;position:relative;overflow:hidden}
.footer a{color:#E9E4DA}
.footer .f-word{font-weight:800;letter-spacing:-.04em;line-height:.82;font-size:clamp(3rem,15vw,12rem);color:#34322C;user-select:none;margin-bottom:8px;white-space:nowrap}
.footer .f-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:34px;margin-bottom:54px}
.footer h4{color:#fff;font-size:13px;letter-spacing:.14em;text-transform:uppercase;margin-bottom:16px;font-weight:600}
.footer .f-links a{display:block;color:#B7B2A8;padding:5px 0;font-size:15px;transition:color .2s}
.footer .f-links a:hover{color:#fff}
.footer .f-bio{color:#B7B2A8;font-size:15px;max-width:34ch}
.footer .f-bot{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding-top:24px;border-top:1px solid #3A382F;font-size:13.5px;color:#8C887E}
@media(max-width:760px){.footer .f-grid{grid-template-columns:1fr 1fr;gap:28px}.footer .f-bio{grid-column:1/-1}}

/* ---------- scroll reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease-out),transform .7s var(--ease-out)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}