/* ============================================================
   Svato Straka — Photography
   Modern, clean portfolio
   ============================================================ */

:root {
  /* Dark theme — dark background, light text */
  --ink: #ededea;         /* primary text (light) */
  --ink-soft: #b3b3ab;    /* secondary text */
  --muted: #82827b;       /* tertiary / labels */
  --line: rgba(255,255,255,.13);
  --paper: #0e0e11;       /* page background */
  --paper-2: #17171c;     /* alternate panel */
  --card: #1e1e25;        /* raised card */
  --accent: #83b2cf;      /* soft, muted light blue */
  --accent-ink: #aacde3;  /* lighter, softer blue for labels on dark */
  --accent-contrast: #0a1620; /* dark text on accent fills */
  --max: 1240px;
  --gap: clamp(16px, 3vw, 40px);
  --radius: 4px;
  --ease: cubic-bezier(.22,.61,.36,1);
  --shadow: 0 20px 50px -20px rgba(0,0,0,.28);
  --header-h: 76px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 .5em;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 56px);
}

.eyebrow {
  font-family: "Space Grotesk", sans-serif;
  text-transform: uppercase;
  letter-spacing: .28em;
  font-size: .72rem;
  font-weight: 600;
  color: var(--accent-ink);
  margin: 0 0 1rem;
}

.section { padding-block: clamp(64px, 9vw, 128px); }
.section--tight { padding-block: clamp(48px, 6vw, 80px); }
.section-head { max-width: 640px; margin-bottom: clamp(32px, 5vw, 56px); }
.section-head h2 { font-size: clamp(2rem, 4.4vw, 3.2rem); }
.section-head p { color: var(--ink-soft); font-size: 1.05rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .6em;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 500;
  font-size: .92rem;
  letter-spacing: .02em;
  padding: .85em 1.7em;
  border-radius: 999px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
  transition: transform .35s var(--ease), background .3s, color .3s, border-color .3s;
}
.btn:hover { transform: translateY(-2px); background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }
.btn--light { background: #fff; color: #141414; border-color: #fff; }
.btn--light:hover { background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background .4s var(--ease), box-shadow .4s, border-color .4s;
  border-bottom: 1px solid transparent;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.site-header.is-solid {
  background: rgba(13,13,16,.82);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom-color: var(--line);
}
/* On pages without a dark hero, header starts solid */
.site-header.static-solid {
  background: rgba(13,13,16,.9);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom-color: var(--line);
}

.brand {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: .02em;
  color: var(--nav-ink, var(--ink));
  transition: color .4s;
}
.brand span { color: var(--accent); }

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 34px);
}
.nav a {
  font-family: "Space Grotesk", sans-serif;
  font-size: .93rem;
  font-weight: 500;
  color: var(--nav-ink, var(--ink));
  position: relative;
  padding: 6px 0;
  transition: color .3s, opacity .3s;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width .35s var(--ease);
}
.nav a:hover::after, .nav a.active::after { width: 100%; }
.nav a.active { color: var(--accent); }

/* language switch */
.lang {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--nav-line, var(--line));
  border-radius: 999px;
  overflow: hidden;
  font-family: "Space Grotesk", sans-serif;
  font-size: .78rem;
  font-weight: 600;
}
.lang button {
  border: 0;
  background: transparent;
  color: var(--nav-ink, var(--ink));
  padding: .45em .8em;
  cursor: pointer;
  letter-spacing: .05em;
  transition: background .25s, color .25s;
}
.lang button.active { background: var(--accent); color: #fff; }

/* header over dark hero */
.site-header.on-dark:not(.is-solid) {
  --nav-ink: #fff;
  --nav-line: rgba(255,255,255,.4);
}
.site-header.on-dark:not(.is-solid) .brand span { color: var(--accent); }

/* burger */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}
.burger span {
  width: 24px; height: 2px;
  background: var(--nav-ink, var(--ink));
  transition: transform .3s, opacity .3s;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  color: #fff;
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.04);
  animation: heroZoom 18s ease-out forwards;
}
@keyframes heroZoom { to { transform: scale(1); } }
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.45) 0%, rgba(0,0,0,.1) 35%, rgba(0,0,0,.72) 100%);
}
.hero .container { position: relative; z-index: 2; padding-bottom: clamp(48px, 9vw, 120px); padding-top: 120px; }
.hero h1 {
  font-size: clamp(2.8rem, 8vw, 6.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  max-width: 14ch;
}
.hero p { font-size: clamp(1.05rem, 2vw, 1.35rem); max-width: 46ch; color: rgba(255,255,255,.9); }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 2rem; }
.scroll-hint {
  position: absolute; left: 50%; bottom: 26px; z-index: 3;
  transform: translateX(-50%);
  color: rgba(255,255,255,.8);
  font-family: "Space Grotesk", sans-serif;
  font-size: .72rem; letter-spacing: .3em; text-transform: uppercase;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.scroll-hint::after { content:""; width:1px; height:34px; background: rgba(255,255,255,.6); animation: pulse 1.8s var(--ease) infinite; }
@keyframes pulse { 0%,100%{opacity:.3; transform: scaleY(.6);} 50%{opacity:1; transform: scaleY(1);} }

/* page hero (interior pages) */
.page-hero {
  padding-top: calc(var(--header-h) + clamp(40px, 7vw, 90px));
  padding-bottom: clamp(28px, 4vw, 52px);
  border-bottom: 1px solid var(--line);
}
.page-hero h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); }
.page-hero p { color: var(--ink-soft); max-width: 60ch; font-size: 1.1rem; }

/* ---------- Category cards (home) ---------- */
.cats { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
.cat {
  position: relative;
  display: block;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--paper-2);
  isolation: isolate;
}
.cat img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .9s var(--ease), filter .6s;
  filter: saturate(.92);
}
.cat::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0) 40%, rgba(0,0,0,.68) 100%);
}
.cat:hover img { transform: scale(1.06); filter: saturate(1.05); }
.cat__label {
  position: absolute; left: 0; bottom: 0; z-index: 2;
  padding: clamp(18px, 2.4vw, 30px);
  color: #fff;
}
.cat__label h3 { font-size: clamp(1.3rem, 2.4vw, 1.9rem); margin: 0; }
.cat__label span {
  font-family: "Space Grotesk", sans-serif;
  font-size: .72rem; letter-spacing: .25em; text-transform: uppercase;
  color: var(--accent); font-weight: 600;
}

/* ---------- About preview / split ---------- */
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(28px, 5vw, 72px); align-items: center; }
.split__media { border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/5; }
.split__media img { width: 100%; height: 100%; object-fit: cover; }
.split__body h2 { font-size: clamp(1.9rem, 4vw, 2.9rem); }
.split__body p { color: var(--ink-soft); }
.stats { display: flex; gap: clamp(24px, 4vw, 48px); margin: 1.8rem 0; flex-wrap: wrap; }
.stat strong { display: block; font-family: "Space Grotesk", sans-serif; font-size: 2.1rem; letter-spacing: -.02em; }
.stat span { font-size: .82rem; color: var(--muted); text-transform: uppercase; letter-spacing: .12em; }

/* ---------- Gallery grid ---------- */
.gallery { columns: 3; column-gap: var(--gap); }
.gallery figure {
  margin: 0 0 var(--gap);
  break-inside: avoid;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: zoom-in;
  position: relative;
  background: var(--paper-2);
}
.gallery img { width: 100%; height: auto; transition: transform .8s var(--ease), filter .5s; filter: saturate(.94); }
.gallery figure::after {
  content: "";
  position: absolute; inset: 0;
  background: rgba(18,18,18,0);
  transition: background .4s;
}
.gallery figure:hover img { transform: scale(1.05); filter: saturate(1.05); }
.gallery figure:hover::after { background: rgba(18,18,18,.12); }
.gallery-empty {
  column-span: all;
  margin: 0;
  padding: clamp(40px, 8vw, 80px) 0;
  text-align: center;
  color: var(--muted);
  font-family: "Space Grotesk", sans-serif;
  letter-spacing: .04em;
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(10,10,10,.94);
  display: none;
  align-items: center; justify-content: center;
  padding: 4vw;
  opacity: 0; transition: opacity .3s;
}
.lightbox.open { display: flex; opacity: 1; }
.lightbox img { max-width: 100%; max-height: 88vh; border-radius: 2px; box-shadow: var(--shadow); }
.lightbox__close, .lightbox__nav {
  position: absolute; background: rgba(255,255,255,.12); color: #fff;
  border: 0; width: 52px; height: 52px; border-radius: 50%;
  font-size: 1.4rem; cursor: pointer; display: grid; place-items: center;
  transition: background .25s, transform .25s;
}
.lightbox__close:hover, .lightbox__nav:hover { background: rgba(255,255,255,.28); }
.lightbox__close { top: 22px; right: 22px; }
.lightbox__nav { top: 50%; transform: translateY(-50%); }
.lightbox__nav.prev { left: 22px; }
.lightbox__nav.next { right: 22px; }
.lightbox__counter { position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%); color: rgba(255,255,255,.7); font-family: "Space Grotesk", sans-serif; font-size: .8rem; letter-spacing: .2em; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 80px); }
.contact-info dl { margin: 0; }
.contact-info dt { font-family: "Space Grotesk", sans-serif; text-transform: uppercase; letter-spacing: .18em; font-size: .72rem; color: var(--muted); margin-top: 1.6rem; }
.contact-info dd { margin: .2rem 0 0; font-size: 1.15rem; }
.contact-info dd a:hover { color: var(--accent-ink); }
.socials { display: flex; gap: 14px; margin-top: 2rem; }
.socials a {
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--line); display: grid; place-items: center;
  transition: background .3s, color .3s, border-color .3s, transform .3s;
  font-family: "Space Grotesk", sans-serif; font-weight: 600; font-size: .8rem;
}
.socials a:hover { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); transform: translateY(-3px); }
.socials a svg { width: 19px; height: 19px; fill: currentColor; display: block; }

form { display: grid; gap: 16px; }
.field label { display: block; font-family: "Space Grotesk", sans-serif; font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: .4rem; }
.field input, .field textarea, .field select {
  width: 100%; padding: .9em 1em; border: 1px solid var(--line);
  border-radius: var(--radius); font: inherit; font-size: .98rem; background: var(--paper);
  transition: border-color .25s, box-shadow .25s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: 0; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(131,178,207,.22);
}
.form-note { font-size: .85rem; color: var(--muted); }
.form-error { font-size: .9rem; color: #e5877d; font-weight: 600; }
/* honeypot — skryté pole proti spamu, mimo dosahu návštevníka */
.hp-field { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; }
/* stav odosielania */
#contact-form button[disabled] { opacity: .6; cursor: progress; }

/* ---------- Footer ---------- */
.site-footer { background: #08080a; color: rgba(255,255,255,.66); padding-block: clamp(48px, 7vw, 88px); border-top: 1px solid var(--line); }
.site-footer a { color: rgba(255,255,255,.72); transition: color .3s; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
.site-footer .brand { color: #fff; font-size: 1.4rem; }
.site-footer h2 { color: #fff; font-size: .8rem; text-transform: uppercase; letter-spacing: .2em; font-family:"Space Grotesk",sans-serif; margin: 0 0 .5em; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.14); margin-top: 48px; padding-top: 24px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: .82rem; color: rgba(255,255,255,.5); }

/* ---------- Reveal on scroll ---------- */
[data-reveal] { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 940px) {
  .split, .contact-grid { grid-template-columns: 1fr; }
  .cats { grid-template-columns: repeat(2, 1fr); }
  .gallery { columns: 2; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .burger { display: flex; }
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    background: rgba(13,13,16,.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 18px clamp(20px,5vw,56px) 28px;
    border-bottom: 1px solid var(--line);
    transform: translateY(-120%);
    transition: transform .4s var(--ease);
    --nav-ink: var(--ink);
  }
  .nav.open { transform: translateY(0); }
  .nav a { font-size: 1.1rem; padding: 10px 0; width: 100%; }
  .cats { grid-template-columns: 1fr; }
  .gallery { columns: 1; }
  .footer-grid { grid-template-columns: 1fr; }
  body { font-size: 16px; }
}

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