/* ==========================================================================
   Natalia Kudia — portfolio theme
   1. Tokens   2. Reset   3. Typography   4. Header   5. Hero
   6. Grid     7. Single  8. Lightbox     9. Forms   10. Footer  11. Utilities
   ========================================================================== */

/* 1. Tokens ------------------------------------------------------------- */
:root{
  --bg:#faf8f5;
  --bg-alt:#f4f0ea;
  --bg-sunk:#f2eee7;
  --surface:#fff;
  --ink:#1a1815;
  --ink-2:#4a443c;
  --muted:#857c6f;
  --rule:#e4ded4;
  --rule-strong:#cec5b7;
  --accent:#8a6a3b;
  --accent-hover:#6d5330;
  --shadow:0 1px 2px rgba(26,24,21,.05),0 8px 28px -12px rgba(26,24,21,.18);
  --shadow-lift:0 2px 6px rgba(26,24,21,.07),0 18px 44px -14px rgba(26,24,21,.28);

  --font-display:"Cormorant Garamond","Iowan Old Style","Times New Roman",Georgia,serif;
  --font-sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;

  --step--1:clamp(.78rem,.76rem + .1vw,.84rem);
  --step-0:clamp(.95rem,.92rem + .16vw,1.04rem);
  --step-1:clamp(1.13rem,1.05rem + .35vw,1.35rem);
  --step-2:clamp(1.4rem,1.22rem + .8vw,2rem);
  --step-3:clamp(1.85rem,1.4rem + 1.9vw,3rem);
  --step-4:clamp(2.4rem,1.5rem + 3.6vw,4.5rem);

  --wrap:1440px;
  --prose:66ch;
  --gut:clamp(1.15rem,4vw,3.25rem);
  --gap:clamp(1rem,2.2vw,2rem);
  --radius:2px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#131210;
    --bg-sunk:#1b1915;
    --surface:#1c1a17;
    --ink:#f2eee7;
    --ink-2:#cdc5b8;
    --muted:#968d7f;
    --rule:#302c26;
    --rule-strong:#463f36;
    --accent:#cfa96a;
    --accent-hover:#e3c08a;
    --shadow:0 1px 2px rgba(0,0,0,.5),0 10px 32px -12px rgba(0,0,0,.7);
    --shadow-lift:0 2px 8px rgba(0,0,0,.55),0 22px 50px -16px rgba(0,0,0,.8);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#131210;
  --bg-sunk:#1b1915;
  --surface:#1c1a17;
  --ink:#f2eee7;
  --ink-2:#cdc5b8;
  --muted:#968d7f;
  --rule:#302c26;
  --rule-strong:#463f36;
  --accent:#cfa96a;
  --accent-hover:#e3c08a;
  --shadow:0 1px 2px rgba(0,0,0,.5),0 10px 32px -12px rgba(0,0,0,.7);
  --shadow-lift:0 2px 8px rgba(0,0,0,.55),0 22px 50px -16px rgba(0,0,0,.8);
  color-scheme:dark;
}

/* 2. Reset -------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font-sans);font-size:var(--step-0);line-height:1.65;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg,video{max-width:100%;height:auto;display:block}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:.22em}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0}
hr{border:0;border-top:1px solid var(--rule);margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}

/* 3. Typography --------------------------------------------------------- */
.display{font-family:var(--font-display);font-weight:400;line-height:1.08;letter-spacing:-.005em}
.t-eyebrow{
  font-size:var(--step--1);letter-spacing:.17em;text-transform:uppercase;
  color:var(--muted);font-weight:500;
}
.t-lead{font-size:var(--step-1);line-height:1.55;color:var(--ink-2)}
:lang(ru) .display{letter-spacing:0}

/* 4. Header ------------------------------------------------------------- */
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:999;
  background:var(--ink);color:var(--bg);padding:.7rem 1.1rem;
}
.skip-link:focus{left:.5rem;top:.5rem}

.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--bg);
  background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .3s ease,background .3s ease;
}
.site-header.is-stuck{border-bottom-color:var(--rule)}
.site-header__inner{
  max-width:var(--wrap);margin-inline:auto;
  padding-inline:var(--gut);padding-block:clamp(.85rem,1.6vw,1.35rem);
  display:flex;align-items:center;gap:var(--gap);
}
.brand{display:flex;flex-direction:column;gap:.1rem;text-decoration:none;margin-right:auto;min-width:0}
.brand__name{
  font-family:var(--font-display);font-size:clamp(1.25rem,.95rem + 1.1vw,1.85rem);
  line-height:1.1;letter-spacing:.02em;white-space:nowrap;
}
.brand__role{
  font-size:.66rem;letter-spacing:.24em;text-transform:uppercase;color:var(--muted);
}
.nav{display:flex;align-items:center;gap:clamp(1rem,2vw,2.1rem);list-style:none}
.nav a{
  text-decoration:none;font-size:var(--step--1);letter-spacing:.11em;
  text-transform:uppercase;color:var(--ink-2);padding-block:.4rem;
  position:relative;transition:color .2s ease;white-space:nowrap;
}
.nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .28s cubic-bezier(.2,.7,.3,1);
}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink)}
.nav a:hover::after,.nav a[aria-current="page"]::after{transform:scaleX(1)}

.lang-switch{display:flex;align-items:center;gap:.45rem;font-size:var(--step--1)}
.lang-switch a,.lang-switch span{
  text-decoration:none;letter-spacing:.09em;text-transform:uppercase;
  color:var(--muted);padding:.2rem .1rem;transition:color .2s ease;
}
.lang-switch a:hover{color:var(--ink)}
.lang-switch [aria-current="true"]{color:var(--ink);font-weight:600}
.lang-switch__sep{color:var(--rule-strong)}

.nav-toggle{
  display:none;background:none;border:1px solid var(--rule-strong);
  border-radius:var(--radius);padding:.5rem .7rem;cursor:pointer;line-height:1;
}
.nav-toggle svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.6}

@media (max-width:860px){
  .nav-toggle{display:block;order:3}
  .site-nav{
    order:5;flex-basis:100%;display:none;
    border-top:1px solid var(--rule);margin-top:.9rem;padding-top:.9rem;
  }
  .site-nav.is-open{display:block}
  .nav{flex-direction:column;align-items:flex-start;gap:.15rem}
  .nav a{font-size:var(--step-0);padding-block:.6rem;text-transform:none;letter-spacing:.03em}
}

/* 5. Hero --------------------------------------------------------------- */
.hero{position:relative;background:var(--bg-sunk);overflow:hidden}
.hero__media{position:relative;width:100%;aspect-ratio:16/9;max-height:78vh}
@media (max-width:760px){.hero__media{aspect-ratio:4/5;max-height:none}}
.hero__media img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero__scrim{
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(10,9,8,.72) 0%,rgba(10,9,8,.28) 45%,rgba(10,9,8,.06) 100%);
}
.hero__body{
  position:absolute;inset:auto 0 0 0;
  max-width:var(--wrap);margin-inline:auto;
  padding:var(--gut);padding-bottom:clamp(1.8rem,4.5vw,3.5rem);
  color:#fff;
}
.hero__title{font-size:var(--step-4);color:#fff;max-width:14ch;text-shadow:0 2px 24px rgba(0,0,0,.35)}
.hero__sub{
  margin-top:.7rem;max-width:44ch;color:rgba(255,255,255,.88);
  font-size:var(--step-1);text-shadow:0 1px 14px rgba(0,0,0,.4);
}
.hero__actions{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:clamp(1.2rem,2.5vw,1.9rem)}
.hero__caption{
  position:absolute;right:var(--gut);top:var(--gut);
  font-size:var(--step--1);color:rgba(255,255,255,.75);
  letter-spacing:.06em;text-align:right;max-width:40%;
}
@media (max-width:760px){.hero__caption{display:none}}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.78rem 1.5rem;border:1px solid currentColor;border-radius:var(--radius);
  font-size:var(--step--1);letter-spacing:.13em;text-transform:uppercase;
  text-decoration:none;cursor:pointer;background:none;
  transition:background .25s ease,color .25s ease,border-color .25s ease,transform .18s ease;
}
.btn--solid{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn--solid:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.btn--ghost{color:inherit;border-color:currentColor}
.btn--ghost:hover{background:currentColor}
.btn--on-dark{color:#fff}
.btn--on-dark:hover{background:#fff;color:#17150f;border-color:#fff}
.btn:active{transform:translateY(1px)}

/* Sections */
.section{
  max-width:var(--wrap);margin-inline:auto;
  padding-inline:var(--gut);padding-block:clamp(3rem,7vw,6.5rem);
}
.section--narrow{max-width:calc(var(--prose) + 2 * var(--gut))}
.section--sunk{max-width:none;background:var(--bg-sunk)}
.section--sunk > *{max-width:var(--wrap);margin-inline:auto}
.section__head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:1rem;margin-bottom:clamp(1.8rem,3.5vw,3rem);
}
.section__title{font-size:var(--step-3)}
.section__title + .t-lead{margin-top:.6rem;max-width:52ch}

/* 6. Gallery grid ------------------------------------------------------- */
.filters{
  display:flex;flex-wrap:wrap;gap:.45rem;
  margin-bottom:clamp(1.6rem,3vw,2.6rem);
}
.filter{
  border:1px solid var(--rule-strong);background:none;border-radius:999px;
  padding:.44rem 1.05rem;font-size:var(--step--1);letter-spacing:.07em;
  cursor:pointer;color:var(--ink-2);text-decoration:none;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.filter:hover{border-color:var(--ink);color:var(--ink)}
.filter[aria-pressed="true"],.filter.is-active{
  background:var(--ink);border-color:var(--ink);color:var(--bg);
}
.filter__n{opacity:.55;margin-left:.35rem;font-variant-numeric:tabular-nums}

.grid{columns:3;column-gap:var(--gap)}
@media (max-width:1100px){.grid{columns:2}}
@media (max-width:620px){.grid{columns:1}}
.grid--dense{columns:4}
@media (max-width:1280px){.grid--dense{columns:3}}
@media (max-width:900px){.grid--dense{columns:2}}
@media (max-width:560px){.grid--dense{columns:1}}

.card{
  break-inside:avoid;margin-bottom:var(--gap);
  display:block;text-decoration:none;position:relative;
  background:var(--surface);box-shadow:var(--shadow);
  transition:box-shadow .35s ease,transform .35s cubic-bezier(.2,.7,.3,1);
}
.card:hover{box-shadow:var(--shadow-lift);transform:translateY(-3px)}
.card__frame{position:relative;overflow:hidden;background:var(--bg-sunk)}
.card__frame img{width:100%;transition:transform .7s cubic-bezier(.2,.7,.3,1)}
.card:hover .card__frame img{transform:scale(1.035)}
.card__body{padding:.95rem 1.1rem 1.15rem}
.card__title{
  font-family:var(--font-display);font-size:var(--step-1);line-height:1.25;color:var(--ink);
}
.card__meta{
  margin-top:.25rem;font-size:var(--step--1);color:var(--muted);
  display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;
}
.card.is-hidden{display:none}

.badge{
  display:inline-block;font-size:.66rem;letter-spacing:.13em;text-transform:uppercase;
  padding:.2rem .5rem;border:1px solid var(--rule-strong);border-radius:999px;color:var(--muted);
}
.badge--sold{border-color:var(--rule-strong);opacity:.8}
.badge--available{border-color:var(--accent);color:var(--accent)}

.empty-state{
  padding:clamp(2.5rem,6vw,5rem) 0;text-align:center;color:var(--muted);
  border:1px dashed var(--rule-strong);
}

/* 7. Single painting ---------------------------------------------------- */
.artwork{
  max-width:var(--wrap);margin-inline:auto;
  padding-inline:var(--gut);padding-block:clamp(1.6rem,3.5vw,3rem);
}
.artwork__layout{
  display:grid;gap:clamp(1.8rem,4vw,3.5rem);
  grid-template-columns:minmax(0,1fr);
}
@media (min-width:980px){
  .artwork__layout{grid-template-columns:minmax(0,1fr) 20rem;align-items:start}
  .artwork__aside{position:sticky;top:7rem}
}
.artwork__stage{
  background:var(--bg-sunk);padding:clamp(.8rem,2.2vw,2rem);
  display:flex;align-items:center;justify-content:center;
}
.artwork__stage img{
  max-height:80vh;width:auto;box-shadow:var(--shadow-lift);cursor:zoom-in;
}
.artwork__title{font-size:var(--step-3);margin-bottom:.4rem}
.artwork__alt-title{
  font-size:var(--step-0);color:var(--muted);font-style:italic;margin-bottom:1.2rem;
}
.specs{margin:1.5rem 0;border-top:1px solid var(--rule)}
.specs__row{
  display:flex;gap:1rem;justify-content:space-between;
  padding:.72rem 0;border-bottom:1px solid var(--rule);font-size:var(--step--1);
}
.specs__k{color:var(--muted);letter-spacing:.08em;text-transform:uppercase;flex-shrink:0}
.specs__v{text-align:right;color:var(--ink)}
.artwork__note{font-size:var(--step--1);color:var(--muted);margin-top:1rem}

.pager{
  display:flex;justify-content:space-between;gap:1rem;
  border-top:1px solid var(--rule);margin-top:clamp(2.5rem,5vw,4rem);padding-top:1.4rem;
  max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gut);
}
.pager a{
  text-decoration:none;font-size:var(--step--1);letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);transition:color .2s ease;display:flex;align-items:center;gap:.5rem;
  max-width:45%;
}
.pager a:hover{color:var(--ink)}
.pager__label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 8. Lightbox ----------------------------------------------------------- */
.lightbox{
  position:fixed;inset:0;z-index:200;display:none;
  background:rgba(12,11,9,.96);
  align-items:center;justify-content:center;
  padding:clamp(.5rem,3vw,3rem);
}
.lightbox.is-open{display:flex}
.lightbox img{
  max-width:100%;max-height:100%;width:auto;height:auto;
  object-fit:contain;animation:lb-in .35s cubic-bezier(.2,.7,.3,1);
}
@keyframes lb-in{from{opacity:0;transform:scale(.97)}to{opacity:1;transform:none}}
.lightbox__btn{
  position:absolute;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.22);
  color:#fff;width:2.9rem;height:2.9rem;border-radius:50%;cursor:pointer;
  display:grid;place-items:center;transition:background .2s ease;
}
.lightbox__btn:hover{background:rgba(255,255,255,.2)}
.lightbox__btn svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7}
.lightbox__close{top:clamp(.6rem,2vw,1.6rem);right:clamp(.6rem,2vw,1.6rem)}
.lightbox__prev{left:clamp(.4rem,2vw,1.6rem);top:50%;transform:translateY(-50%)}
.lightbox__next{right:clamp(.4rem,2vw,1.6rem);top:50%;transform:translateY(-50%)}
.lightbox__cap{
  position:absolute;left:0;right:0;bottom:clamp(.6rem,2vw,1.4rem);
  text-align:center;color:rgba(255,255,255,.8);font-size:var(--step--1);
  padding-inline:4rem;font-family:var(--font-display);
}
body.lb-open{overflow:hidden}

/* 9. Prose + forms ------------------------------------------------------ */
.prose{max-width:var(--prose);font-size:var(--step-1);color:var(--ink-2);line-height:1.72}
.prose > * + *{margin-top:1.15em}
.prose h2{font-family:var(--font-display);font-size:var(--step-2);color:var(--ink);line-height:1.2;margin-top:1.8em}
.prose h3{font-family:var(--font-display);font-size:var(--step-1);color:var(--ink);margin-top:1.6em}
.prose a{color:var(--accent);text-decoration:underline}
.prose a:hover{color:var(--accent-hover)}
.prose img{margin-block:1.6em;box-shadow:var(--shadow)}
.prose blockquote{
  border-left:2px solid var(--accent);padding-left:1.2rem;
  font-family:var(--font-display);font-size:var(--step-2);line-height:1.35;color:var(--ink);
}
.prose ul,.prose ol{padding-left:1.3rem}
.prose li + li{margin-top:.4em}

.about{display:grid;gap:clamp(2rem,5vw,4rem);align-items:start}
@media (min-width:900px){.about{grid-template-columns:22rem minmax(0,1fr)}}
.about__portrait{box-shadow:var(--shadow)}

.form{display:grid;gap:1.1rem;max-width:34rem}
.field{display:grid;gap:.4rem}
.field label{font-size:var(--step--1);letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}
.field input,.field textarea,.field select{
  width:100%;padding:.72rem .85rem;background:var(--surface);
  border:1px solid var(--rule-strong);border-radius:var(--radius);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(138,106,59,.18);
  box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 18%,transparent);
}
.field textarea{min-height:9rem;resize:vertical}
.field--hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form__note{font-size:var(--step--1);color:var(--muted)}
.notice{
  padding:.9rem 1.1rem;border-left:3px solid var(--accent);
  background:var(--bg-sunk);font-size:var(--step-0);
}
.notice--error{border-left-color:#b4472f;color:var(--ink)}
.notice--ok{border-left-color:#4a7a52}

.contact-grid{display:grid;gap:clamp(2rem,5vw,4rem)}
@media (min-width:900px){.contact-grid{grid-template-columns:minmax(0,1fr) 18rem}}
.contact-list{list-style:none;display:grid;gap:.9rem;font-size:var(--step-0)}
.contact-list a{color:var(--accent);text-decoration:none}
.contact-list a:hover{text-decoration:underline}
.contact-list dt{font-size:var(--step--1);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}

/* 10. Footer ------------------------------------------------------------ */
.site-footer{
  border-top:1px solid var(--rule);margin-top:clamp(3rem,7vw,6rem);
  background:var(--bg-sunk);
}
.site-footer__inner{
  max-width:var(--wrap);margin-inline:auto;
  padding-inline:var(--gut);padding-block:clamp(2.2rem,5vw,3.6rem);
  display:grid;gap:1.6rem;
}
@media (min-width:760px){
  .site-footer__inner{grid-template-columns:1fr auto;align-items:center}
}
.site-footer__name{font-family:var(--font-display);font-size:var(--step-2);line-height:1.1}
.site-footer__meta{font-size:var(--step--1);color:var(--muted);margin-top:.5rem}
.social{display:flex;gap:1rem;list-style:none;align-items:center}
.social a{color:var(--muted);transition:color .2s ease;display:block}
.social a:hover{color:var(--ink)}
.social svg{width:20px;height:20px;fill:currentColor}

/* 11. Utilities --------------------------------------------------------- */
.screen-reader-text{
  position:absolute!important;width:1px;height:1px;overflow:hidden;
  clip:rect(1px,1px,1px,1px);white-space:nowrap;
}
.protected img{-webkit-user-drag:none;user-select:none;-webkit-touch-callout:none;pointer-events:auto}
.reveal{opacity:0;transform:translateY(14px)}
.reveal.is-in{opacity:1;transform:none;transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1)}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
  .card:hover{transform:none}
  .card:hover .card__frame img{transform:none}
}
@media print{
  .site-header,.site-footer,.lightbox,.filters,.pager,.hero__actions{display:none!important}
  body{background:#fff;color:#000}
  .card{box-shadow:none;border:1px solid #ddd}
}