/* ============================================================
   AURUM Kancelaria Rachunkowa — site.css (shared design system)
   tokens · reset · typography · buttons · nav · footer
   · faq · team · contact/form · page-hero · reveals · a11y
   Used by index.html and all subpages.
   ============================================================ */

:root{
  /* palette — editorial ink / paper / brass */
  --ink:        #10151d;
  --ink-2:      #161d28;
  --ink-3:      #202a38;
  --paper:      #f6f1e7;
  --paper-2:    #efe8da;
  --brass:      #ad8246;
  --brass-2:    #c79c5d;
  --brass-ink:  #8a6531; /* darker brass — AA (4.5:1+) for small text on paper */
  --text:       #1d242e;
  --muted:      #5d6571;
  --muted-d:    #97a0ad;
  --line:       rgba(20, 26, 36, .14);
  --line-d:     rgba(246, 241, 231, .14);

  /* type */
  --serif: "Fraunces", Georgia, serif;
  --sans:  "Inter", -apple-system, "Segoe UI", sans-serif;
  --fs-hero: clamp(2.7rem, 6.6vw, 5.9rem);
  --fs-h2:   clamp(1.9rem, 4.2vw, 3.55rem);
  --fs-h3:   clamp(1.3rem, 2.2vw, 1.85rem);
  --fs-body: clamp(1rem, .4vw + .92rem, 1.125rem);
  --fs-sm:   .875rem;

  /* spacing scale */
  --s2: 1rem; --s3: 1.5rem; --s4: 2.5rem;
  --s5: 4rem; --s6: 6.5rem; --s7: clamp(5.5rem, 11vw, 10.5rem);

  --container: 1240px;
  --pad: clamp(1.25rem, 4vw, 3rem);
  --ease: cubic-bezier(.22,.61,.21,1);
}

*,*::before,*::after{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: no-preference){ html.has-lenis{ scroll-behavior:auto; } }
body{
  font-family:var(--sans); font-size:var(--fs-body); line-height:1.65;
  color:var(--text); background:var(--paper);
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
img{ display:block; max-width:100%; }
a{ color:inherit; }
ul{ list-style:none; }
:focus-visible{ outline:2px solid var(--brass); outline-offset:3px; }
[id]{ scroll-margin-top:5.5rem; }

.container{ max-width:var(--container); margin-inline:auto; padding-inline:var(--pad); }
.section{ padding-block:var(--s7); }

/* ---------- shared typography ---------- */
.h2{
  font-family:var(--serif); font-weight:400; font-size:var(--fs-h2);
  line-height:1.08; letter-spacing:-.01em; color:var(--ink);
}
.h2 em{ font-style:italic; font-weight:300; color:var(--brass); }
.eyebrow{
  font-size:.78rem; font-weight:600; letter-spacing:.24em; text-transform:uppercase;
  color:var(--brass-ink); margin-bottom:var(--s3); display:flex; align-items:center; gap:.9rem;
}
.eyebrow::before{ content:""; width:2.6rem; height:1px; background:var(--brass); }
.eyebrow--light{ color:var(--brass-2); }
.section-head{ margin-bottom:clamp(2.5rem, 6vw, 4.5rem); }
.section-sub{ max-width:54ch; color:var(--muted); margin-top:var(--s3); }

/* buttons */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:.55rem;
  font-family:var(--sans); font-weight:600; font-size:.95rem; letter-spacing:.02em;
  padding:.95rem 1.9rem; text-decoration:none; cursor:pointer;
  border:1px solid transparent; border-radius:2px;
  transition:background .35s var(--ease), color .35s var(--ease),
             border-color .35s var(--ease), transform .35s var(--ease);
}
.btn--lg{ padding:1.15rem 2.4rem; font-size:1.02rem; }
.btn--brass{ background:var(--brass); color:var(--ink); }
.btn--brass:hover{ background:var(--brass-2); transform:translateY(-2px); }
.btn--ghost{ border-color:rgba(246,241,231,.45); color:var(--paper); }
.btn--ghost:hover{ border-color:var(--paper); background:rgba(246,241,231,.08); }
.btn--line{ border-color:var(--line); color:var(--ink); }
.btn--line:hover{ border-color:var(--ink); }
.link-arrow{
  display:inline-flex; align-items:center; gap:.6rem; margin-top:var(--s3);
  font-weight:600; font-size:.95rem; color:var(--ink); text-decoration:none;
  border-bottom:1px solid var(--brass); padding-bottom:.3rem;
}
.link-arrow::after{ content:"→"; color:var(--brass); transition:transform .3s var(--ease); }
.link-arrow:hover::after{ transform:translateX(.4rem); }

/* parallax frames */
.parallax-frame{ overflow:hidden; }
.parallax-frame img{ width:100%; height:115%; object-fit:cover; will-change:transform; }

/* ---------- nav ---------- */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:100;
  transition:background .45s var(--ease), box-shadow .45s var(--ease);
}
.nav__inner{
  max-width:var(--container); margin-inline:auto; padding:1.1rem var(--pad);
  display:flex; align-items:center; gap:2.2rem;
}
.nav__brand{ display:flex; align-items:center; gap:.8rem; text-decoration:none; margin-right:auto; }
.nav__monogram{
  width:2.5rem; height:2.5rem; display:grid; place-items:center;
  font-family:var(--serif); font-style:italic; font-weight:400; font-size:1.45rem;
  color:var(--brass-2); border:1px solid var(--line-d); border-radius:50%;
  transition:border-color .45s var(--ease);
}
.nav__name{
  font-family:var(--serif); font-size:1.3rem; letter-spacing:.04em; color:var(--paper);
  display:flex; flex-direction:column; line-height:1.1;
  transition:color .45s var(--ease);
}
.nav__name em{
  font-family:var(--sans); font-style:normal; font-size:.6rem; font-weight:600;
  letter-spacing:.28em; text-transform:uppercase; color:var(--muted-d); margin-top:.25rem;
}
.nav__links{ display:flex; gap:1.7rem; }
.nav__links a{
  font-size:.9rem; font-weight:500; text-decoration:none; color:rgba(246,241,231,.82);
  padding-bottom:.25rem; border-bottom:1px solid transparent;
  transition:color .3s, border-color .3s;
}
.nav__links a:hover{ color:#fff; border-color:var(--brass-2); }
.nav__links a.is-active{ color:#fff; border-color:var(--brass-2); }
.nav__cta{ padding:.7rem 1.4rem; font-size:.85rem; }
.nav.is-solid{ background:rgba(16,21,29,.92); backdrop-filter:blur(14px); box-shadow:0 1px 0 var(--line-d); }
.nav__burger{ display:none; background:none; border:0; width:2.4rem; height:2rem; cursor:pointer; position:relative; }
.nav__burger span{
  position:absolute; left:.3rem; right:.3rem; height:2px; background:var(--paper);
  transition:transform .35s var(--ease), top .35s var(--ease);
}
.nav__burger span:first-child{ top:.62rem; } .nav__burger span:last-child{ top:1.25rem; }
.nav__burger.is-open span:first-child{ top:.95rem; transform:rotate(45deg); }
.nav__burger.is-open span:last-child{ top:.95rem; transform:rotate(-45deg); }
.nav__mobile{
  display:none; flex-direction:column; background:var(--ink); padding:1rem var(--pad) 2rem;
  border-top:1px solid var(--line-d);
}
.nav__mobile a{
  color:var(--paper); text-decoration:none; font-family:var(--serif); font-size:1.35rem;
  padding:.7rem 0; border-bottom:1px solid var(--line-d);
}
.nav__mobile a:last-child{ border-bottom:0; }
.nav.is-open .nav__mobile{ display:flex; }

/* ---------- page hero (subpages) ---------- */
.page-hero{
  position:relative; background:var(--ink); color:var(--paper);
  padding:clamp(9rem, 18vh, 12rem) 0 clamp(3.5rem, 7vw, 5.5rem); overflow:hidden;
}
.page-hero__media{ position:absolute; inset:0; z-index:0; }
.page-hero__media img{ width:100%; height:100%; object-fit:cover; filter:brightness(.42) saturate(.65); }
.page-hero__media::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(16,21,29,.66) 0%, rgba(16,21,29,.35) 55%, rgba(16,21,29,.92) 100%);
}
.page-hero .container{ position:relative; z-index:1; }
.page-hero__crumbs{
  display:flex; align-items:center; gap:.7rem; margin-bottom:var(--s3);
  font-size:.78rem; font-weight:600; letter-spacing:.22em; text-transform:uppercase; color:var(--brass-2);
}
.page-hero__crumbs a{ color:rgba(246,241,231,.7); text-decoration:none; transition:color .3s; }
.page-hero__crumbs a:hover{ color:#fff; }
.page-hero__crumbs i{ font-style:normal; color:var(--muted-d); }
.page-hero__title{
  font-family:var(--serif); font-weight:300; font-size:clamp(2.4rem, 5.6vw, 4.8rem);
  line-height:1.05; letter-spacing:-.015em; color:#fdfaf4; max-width:18ch;
}
.page-hero__title em{ font-style:italic; color:var(--brass-2); }
.page-hero__lead{
  max-width:52ch; color:rgba(246,241,231,.82); margin-top:var(--s3);
  font-size:clamp(1rem, 1.2vw, 1.15rem);
}

/* ---------- faq (shared: index + cennik) ---------- */
.faq{ background:var(--paper); }
.faq__layout{ display:grid; grid-template-columns:minmax(0,5fr) minmax(0,7fr); gap:clamp(2.5rem, 6vw, 5rem); align-items:start; }
.faq__head{ position:sticky; top:7rem; }
.faq__item{ border-bottom:1px solid var(--line); }
.faq__item summary{
  list-style:none; cursor:pointer; display:flex; justify-content:space-between; align-items:baseline; gap:1.5rem;
  font-family:var(--serif); font-weight:400; font-size:clamp(1.08rem, 1.6vw, 1.35rem);
  color:var(--ink); padding:1.45rem .2rem; transition:color .3s;
}
.faq__item summary::-webkit-details-marker{ display:none; }
.faq__item summary::after{
  content:"+"; font-family:var(--serif); font-weight:300; font-size:1.6rem; line-height:1;
  color:var(--brass); flex-shrink:0; transition:transform .35s var(--ease);
}
.faq__item[open] summary{ color:var(--brass-ink); }
.faq__item[open] summary::after{ transform:rotate(45deg); }
.faq__body{ overflow:hidden; }
.faq__body p{ padding:0 .2rem 1.6rem; color:var(--muted); max-width:62ch; }

/* ---------- team person (shared: index + o-nas) ---------- */
.team{ background:var(--paper); }
.team__grid{ display:grid; grid-template-columns:repeat(4, 1fr); gap:2.2rem 1.6rem; }
.person__avatar{
  width:6.4rem; height:6.4rem; border-radius:50%; background:var(--ink);
  display:grid; place-items:center; margin-bottom:1.4rem; position:relative;
}
.person__avatar::after{
  content:""; position:absolute; inset:-7px; border-radius:50%;
  border:1px solid var(--brass); opacity:.55;
}
.person__avatar span{
  font-family:var(--serif); font-style:italic; font-weight:300;
  font-size:1.9rem; color:var(--brass-2); letter-spacing:.04em;
}
.person__name{ font-family:var(--serif); font-weight:400; font-size:1.3rem; color:var(--ink); }
.person__role{ font-size:.8rem; font-weight:600; letter-spacing:.1em; text-transform:uppercase; color:var(--brass-ink); margin:.4rem 0 .9rem; }
.person__bio{ font-size:.92rem; color:var(--muted); }

/* ---------- contact + form (shared: index + kontakt) ---------- */
.contact{ background:var(--paper); }
.contact__layout{ display:grid; grid-template-columns:minmax(0,5fr) minmax(0,6fr); gap:clamp(3rem, 7vw, 6rem); align-items:start; }
.contact__details{ margin-top:2.4rem; display:grid; gap:1.5rem; }
.contact__details div{ border-top:1px solid var(--line); padding-top:1.1rem; display:grid; grid-template-columns:7rem 1fr; gap:1rem; }
.contact__details dt{
  font-size:.74rem; font-weight:600; letter-spacing:.2em; text-transform:uppercase; color:var(--brass-ink); padding-top:.25rem;
}
.contact__details dd{ color:var(--text); }
.contact__details a{ color:var(--ink); text-decoration:none; border-bottom:1px solid var(--brass); }
.contact__details a:hover{ color:var(--brass); }
.contact__media{ margin-top:2.6rem; }
.contact__media .parallax-frame{ aspect-ratio:16/10; }
.contact__form{
  background:var(--ink); color:var(--paper); padding:clamp(1.8rem, 4vw, 3rem);
}
.contact__form-title{
  font-family:var(--serif); font-weight:400; font-size:1.45rem; line-height:1.3; margin-bottom:2rem; color:#fdfaf4;
}
.field{ margin-bottom:1.5rem; }
.field label{
  display:block; font-size:.74rem; font-weight:600; letter-spacing:.18em; text-transform:uppercase;
  color:var(--muted-d); margin-bottom:.5rem;
}
.field input, .field select, .field textarea{
  width:100%; background:transparent; border:0; border-bottom:1px solid var(--line-d);
  color:var(--paper); font-family:var(--sans); font-size:1rem; padding:.6rem 0;
  border-radius:0; transition:border-color .3s;
}
.field select{ appearance:none; padding-right:1.8rem; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; background-image:linear-gradient(45deg, transparent 50%, var(--brass-2) 50%), linear-gradient(135deg, var(--brass-2) 50%, transparent 50%); background-position:calc(100% - 14px) 50%, calc(100% - 8px) 50%; background-size:6px 6px; background-repeat:no-repeat; cursor:pointer; }
.field select option{ color:var(--ink); }
.field textarea{ resize:vertical; min-height:96px; }
.field input::placeholder, .field textarea::placeholder{ color:rgba(246,241,231,.35); }
.field input:focus, .field select:focus, .field textarea:focus{ outline:none; border-color:var(--brass-2); }
.contact__rodo{ font-size:.78rem; color:var(--muted-d); margin-bottom:1.6rem; max-width:60ch; }
.contact__success{ margin-top:1.4rem; padding:1rem 1.2rem; border:1px solid var(--brass); color:var(--brass-2); font-size:.95rem; }

/* ---------- footer ---------- */
.footer{ background:var(--ink); color:var(--paper); padding-top:var(--s6); }
.footer__grid{
  display:grid; grid-template-columns:minmax(0,4fr) repeat(3, minmax(0,2.5fr));
  gap:2.5rem; padding-bottom:var(--s5);
}
.footer__logo{
  font-family:var(--serif); font-size:1.7rem; display:flex; align-items:center; gap:.7rem; margin-bottom:1rem;
}
.footer__logo span{
  width:2.4rem; height:2.4rem; display:grid; place-items:center; border:1px solid var(--line-d); border-radius:50%;
  font-style:italic; font-size:1.3rem; color:var(--brass-2);
}
.footer__tag{ color:var(--muted-d); font-size:.92rem; max-width:34ch; }
.footer__col h4{
  font-size:.74rem; font-weight:600; letter-spacing:.22em; text-transform:uppercase;
  color:var(--brass-2); margin-bottom:1.2rem;
}
.footer__col a{ display:block; color:rgba(246,241,231,.78); text-decoration:none; padding:.32rem 0; font-size:.95rem; }
.footer__col a:hover{ color:var(--brass-2); }
.footer__col p{ color:rgba(246,241,231,.78); font-size:.95rem; padding-top:.32rem; }
.footer__legal{
  border-top:1px solid var(--line-d); padding-block:1.6rem;
  display:flex; flex-wrap:wrap; justify-content:space-between; gap:.8rem;
  font-size:.8rem; color:var(--muted-d);
}
.footer__legal em{ font-style:italic; color:var(--brass-2); }
.footer__legal a{ color:var(--paper); text-decoration:none; border-bottom:1px solid var(--brass); }

/* ---------- scroll reveals (subpages — IO driven) ---------- */
html.js-reveal [data-reveal]{
  opacity:0; transform:translateY(26px);
  transition:opacity .75s var(--ease), transform .75s var(--ease);
}
html.js-reveal [data-reveal].is-in{ opacity:1; transform:none; }

/* ---------- responsive (shared) ---------- */
@media (max-width: 980px){
  .nav__links, .nav__cta{ display:none; }
  .nav__burger{ display:block; }
  .nav{ background:rgba(16,21,29,.92); backdrop-filter:blur(14px); }
  .faq__layout{ grid-template-columns:1fr; }
  .faq__head{ position:static; }
  .team__grid{ grid-template-columns:repeat(2, 1fr); }
  .contact__layout{ grid-template-columns:1fr; }
  .footer__grid{ grid-template-columns:1fr 1fr; }
}
@media (max-width: 560px){
  .team__grid{ grid-template-columns:1fr; }
  .footer__grid{ grid-template-columns:1fr; }
}

/* ---------- reduced motion (shared) ---------- */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *, *::before, *::after{
    animation-duration:.01ms !important; animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  html.js-reveal [data-reveal]{ opacity:1; transform:none; }
}