/* ==========================================================================
   Tereza Čuříková – HR konzultantka
   style.css – design systém + komponenty (mobile-first)
   Obsah:
   1. Fonty
   2. Design tokeny (barvy, spacing, typografie, layout)
   3. Reset a základ
   4. Typografie
   5. Layout (container, grid, section)
   6. Komponenty (button, navbar, hero, card, accordion, form, cookie, footer…)
   7. Utility
   8. Breakpointy (min-width: 600 / 768 / 992 / 1400 / 2200)
   ========================================================================== */

/* 1. FONTY ---------------------------------------------------------------- */
/* TT Chocolates – brandový font. Soubory vložte do /fonts (woff2).
   Dokud nejsou dodány, použije se záložní Outfit. */
@font-face {
  font-family: "TT Chocolates";
  src: local("TT Chocolates Bold"), url("fonts/TTChocolates-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "TT Chocolates";
  src: local("TT Chocolates DemiBold"), url("fonts/TTChocolates-DemiBold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* 2. DESIGN TOKENY -------------------------------------------------------- */
:root {
  /* Barvy */
  --color-primary: #5e311e;      /* značková hlavní */
  --color-secondary: #d4bab5;    /* značková sekundární */
  --color-brand-mid: #946d63;    /* střední hnědá (linky služeb) */
  --color-sand: #e2d0ba;         /* písková – sekce pod hero */
  --color-button: #481f13;       /* tlačítka / tmavé plochy */
  --color-background: #ffffff;
  --color-text: #333333;
  --color-muted: #6b5a56;        /* tlumený text (kontrast ≥ 4.5:1 na bílé) */
  --color-accent: #f6efed;       /* jemné neutrální pozadí */
  --color-line: #e7dcd9;
  --color-on-dark: #ffffff;
  --color-on-dark-muted: #e9dcd8;

  /* Spacing (8px grid) – hodnoty v rem, 1rem = 16px */
  --space-1: 0.25rem; /* 4  */
  --space-2: 0.5rem;  /* 8  */
  --space-3: 0.75rem; /* 12 */
  --space-4: 1rem;    /* 16 */
  --space-5: 1.5rem;  /* 24 */
  --space-6: 2rem;    /* 32 */
  --space-7: 3rem;    /* 48 */
  --space-8: 4rem;    /* 64 */
  --space-9: 6rem;    /* 96 */

  /* Typografie */
  --font-body: "Outfit", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-heading: "TT Chocolates", "Outfit", system-ui, sans-serif;
  --text-base: 1rem;       /* 16px */
  --text-sm: 1rem;         /* min. 16px */
  --text-lg: 1.25rem;      /* ratio 1.25 */
  --lh-body: 1.7;
  --lh-heading: 1.15;
  /* Nadpisy – stupnice 1.25 s clamp */
  --h1: clamp(2.35rem, 1.45rem + 3.3vw, 4.35rem);
  --h2: clamp(2rem, 1.3rem + 2.8vw, 3.75rem);
  --h3: clamp(1.5rem, 1.2rem + 1.2vw, 2.25rem);
  --h4: clamp(1.25rem, 1.1rem + 0.6vw, 1.625rem);
  --h5: clamp(1.125rem, 1.05rem + 0.3vw, 1.25rem);
  --h6: 1rem;

  /* Layout */
  --container: 85%;
  --container-max: 2000px;
  --prose: 70%;
  --header-h: 4.5rem;
  --radius: 0.25rem;       /* jednotné zaoblení */
  --radius-round: 50%;
  --shadow-card: 0 2px 12px rgba(72, 31, 19, 0.06);
  --transition: 0.25s ease;
}

/* 3. RESET A ZÁKLAD ------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--lh-body);
  color: var(--color-text);
  background: var(--color-background);
  text-align: left;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 var(--space-4); }
button, input, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 3px; }
.on-dark :focus-visible { outline-color: var(--color-secondary); }
.skip-link {
  position: absolute; left: var(--space-4); top: -4rem; z-index: 200;
  background: var(--color-button); color: var(--color-on-dark);
  padding: var(--space-3) var(--space-4); border-radius: 0;
}
.skip-link:focus { top: var(--space-4); }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* 4. TYPOGRAFIE ----------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--lh-heading);
  margin: 0 0 var(--space-4);
  color: inherit;
  text-wrap: balance;
}
h1 { font-size: var(--h1); letter-spacing: -0.02em; }
h2 { font-size: var(--h2); letter-spacing: -0.01em; }
h3 { font-size: var(--h3); }
h4 { font-size: var(--h4); }
h5 { font-size: var(--h5); }
h6 { font-size: var(--h6); }
.lead { font-size: var(--text-lg); color: var(--color-muted); }
.eyebrow {
  display: inline-block;
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.on-dark .eyebrow { color: var(--color-secondary); }
.prose { max-width: var(--prose); }

/* 5. LAYOUT --------------------------------------------------------------- */
.container {
  width: var(--container);
  max-width: var(--container-max);
  margin-inline: auto;
}
/* 12sloupcový grid – mobile-first (jeden sloupec, od tabletu se rozdělí) */
.grid { display: grid; gap: var(--space-5); grid-template-columns: 1fr; }
.section { padding-block: var(--space-8); }
.section--accent { background: var(--color-accent); }
.section--dark {
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-button) 100%);
  color: var(--color-on-dark);
}
.section--band { background: var(--color-secondary); color: var(--color-button); }
.section__head { margin-bottom: var(--space-7); }

/* 6. KOMPONENTY ----------------------------------------------------------- */

/* Button */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-3);
  min-height: 3.5rem;
  padding: var(--space-3) var(--space-6);
  border: 2px solid var(--color-button);
  border-radius: 0;
  background: var(--color-button);
  color: var(--color-on-dark);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.btn:hover { background: var(--color-primary); border-color: var(--color-primary); }
.btn--ghost { background: transparent; color: var(--color-button); }
.btn--ghost:hover { background: var(--color-button); color: var(--color-on-dark); border-color: var(--color-button); }
.btn--light { background: var(--color-on-dark); border-color: var(--color-on-dark); color: var(--color-button); }
.btn--light:hover { background: var(--color-secondary); border-color: var(--color-secondary); color: var(--color-button); }
.btn-row { display: flex; flex-wrap: wrap; gap: var(--space-4); }

/* Navbar */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
}
.navbar__inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: var(--header-h);
}
.logo {
  display: inline-flex; align-items: center; gap: var(--space-3);
  font-family: var(--font-heading); font-weight: 700; font-size: var(--h5);
  color: var(--color-button); text-decoration: none;
}
.logo__mark {
  display: grid; place-items: center; width: 2.5rem; height: 2.5rem;
  border-radius: var(--radius-round); background: var(--color-primary); color: var(--color-on-dark);
  font-size: 1.125rem;
}
.nav-toggle {
  display: inline-grid; place-items: center; width: 3rem; height: 3rem;
  background: none; border: 0; border-radius: 0; cursor: pointer;
  color: var(--color-button); font-size: 1.5rem;
}
.nav {
  position: absolute; inset: 100% 0 auto 0;
  display: none; flex-direction: column; gap: var(--space-1);
  padding: var(--space-4) 7.5% var(--space-5);
  background: var(--color-background); border-bottom: 1px solid var(--color-line);
}
.nav.is-open { display: flex; }
.nav a {
  padding: var(--space-3) 0; text-decoration: none; font-weight: 500;
  border-bottom: 2px solid transparent;
}
.nav a:not(.btn):hover, .nav a:not(.btn)[aria-current="true"] { color: var(--color-primary); }
.nav .btn { margin-top: var(--space-3); }

/* Hero */
.hero { background: var(--color-background); overflow: hidden; }
.hero__inner { display: grid; gap: var(--space-7); padding-block: 0; }
.hero__media {
  margin-inline: calc(50% - 50vw); /* mobil: tmavý pruh přes celou šířku */
  padding: var(--space-7) 7.5% 0;
  background: var(--color-primary);
}
.hero__photo {
  width: 100%; max-width: 26rem; aspect-ratio: 3 / 4; object-fit: cover;
  margin-bottom: calc(var(--space-7) * -1);
  box-shadow: 0 24px 60px rgba(72, 31, 19, 0.25);
  background: var(--color-secondary);
}
.hero__content { padding-block: var(--space-7) var(--space-8); }
.hero__title { margin-bottom: var(--space-3); color: var(--color-text); }
.hero__subtitle {
  margin: 0 0 var(--space-5);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--h3);
  line-height: var(--lh-heading);
  color: var(--color-primary);
}
.hero__text { margin-bottom: var(--space-6); color: var(--color-muted); }

/* Section intro (levý nadpis + obsah) */
.split { display: grid; gap: var(--space-6); grid-template-columns: 1fr; }

/* Card */
.cards { display: grid; gap: var(--space-5); grid-template-columns: 1fr; }
.card {
  display: flex; flex-direction: column; gap: var(--space-3);
  padding: var(--space-6);
  background: var(--color-background);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), transform var(--transition);
}
.card:hover { border-color: var(--color-primary); transform: translateY(-2px); }
.card__icon {
  display: grid; place-items: center; width: 3.5rem; height: 3.5rem;
  border-radius: var(--radius); background: var(--color-accent); color: var(--color-primary);
  font-size: 1.5rem;
}
.card__title { margin: 0; font-size: var(--h4); }
.card p { margin: 0; color: var(--color-muted); }
.card--quote { gap: var(--space-4); }
.card__author { display: flex; align-items: center; gap: var(--space-3); margin-top: auto; }
.avatar {
  display: grid; place-items: center; width: 3rem; height: 3rem; flex: none;
  border-radius: var(--radius-round); background: var(--color-secondary); color: var(--color-button); font-weight: 600;
}
.card__author strong { display: block; line-height: 1.3; }
.card__author span { color: var(--color-muted); }

/* Služby – název nad barevnou linkou (stejná délka i tloušťka) */
.services { display: grid; gap: var(--space-7); align-content: center; }
.service__name { margin: 0 0 var(--space-3); font-size: var(--h5); letter-spacing: 0.08em; text-transform: uppercase; }
.service__line { display: block; width: 100%; height: 0.75rem; border-radius: var(--radius); }
.service__line--1 { background: var(--color-button); }
.service__line--2 { background: var(--color-primary); }
.service__line--3 { background: var(--color-brand-mid); }
.service__line--4 { background: var(--color-sand); }

/* Jak pracuji – portrét + tmavý blok */
.about-head { text-align: center; padding-bottom: var(--space-7); }
.about-head__photo {
  width: 11.5rem; height: 11.5rem; margin: 0 auto var(--space-5);
  border-radius: var(--radius-round); object-fit: cover; background: var(--color-secondary);
}
.about-head .lead { margin-inline: auto; }
.socials { display: flex; justify-content: center; gap: var(--space-4); margin-top: var(--space-5); }
.socials a {
  display: grid; place-items: center; width: 2.5rem; height: 2.5rem;
  border-radius: var(--radius-round);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(226, 208, 186, 0.45);
  color: var(--color-sand);
  font-size: 0.95rem;
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.socials a:hover {
  background: var(--color-sand);
  border-color: var(--color-sand);
  color: var(--color-button);
}
.steps { display: grid; gap: var(--space-4); }
.steps li {
  display: flex; gap: var(--space-4); align-items: baseline;
  font-weight: 600; letter-spacing: 0.03em; text-transform: uppercase;
}
.steps li::before {
  content: ""; flex: none; width: 1.25rem; height: 2px; background: var(--color-secondary);
  transform: translateY(-0.3em);
}
.section--dark p { color: var(--color-on-dark-muted); }
.label {
  margin-bottom: var(--space-4);
  font-size: var(--text-sm); font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase;
}

/* CTA pruh (bílé pozadí + magnetické částice) */
.cta-band__title { text-align: left; margin-bottom: var(--space-6); }
.cta-band .btn-row .btn { background: var(--color-button); border-color: var(--color-button); }
.cta-band .btn-row .btn:hover { background: var(--color-primary); border-color: var(--color-primary); }
.cta-band__main {
  background: var(--color-background); color: var(--color-button);
  padding-block: var(--space-8) var(--space-7);
}
/* Magnetické částice */
.cta-band__main, .has-particles { position: relative; overflow: hidden; }
.cta-band__particles, .particles-canvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.cta-band__content, .particles-content { position: relative; z-index: 1; }
@media (min-width: 992px) {
  .cta-band__main { padding-block: var(--space-9) var(--space-8); }
}


/* Accordion (barevné linky 0.75rem jako u služeb, 2 sloupce) */
.accordion { display: grid; gap: var(--space-5) var(--space-7); grid-template-columns: 1fr; align-items: start; }
.accordion__item { background: transparent; }
.accordion__item::after {
  content: ""; display: block; width: 100%; height: 0.75rem;
  border-radius: var(--radius);
  background: var(--color-primary);
}
.accordion__item:nth-child(1)::after { background: var(--color-button); }
.accordion__item:nth-child(2)::after { background: var(--color-primary); }
.accordion__item:nth-child(3)::after { background: var(--color-brand-mid); }
.accordion__item:nth-child(4)::after { background: var(--color-sand); }
.accordion__trigger {
  display: flex; width: 100%; align-items: center; justify-content: space-between; gap: var(--space-4);
  padding: var(--space-5) 0;
  background: none; border: 0; text-align: left; cursor: pointer;
  font-family: var(--font-heading); font-weight: 700; font-size: var(--h5);
  color: var(--color-button);
}
.accordion__trigger i {
  display: grid; place-items: center; width: 2rem; height: 2rem; flex: none;
  border-radius: var(--radius-round);
  background: transparent;
  border: 1px solid var(--color-secondary);
  color: var(--color-primary);
  font-size: 0.75rem;
  transition: transform var(--transition);
}
.accordion__trigger[aria-expanded="true"] i { transform: rotate(45deg); }
.accordion__panel {
  display: grid; grid-template-rows: 0fr; transition: grid-template-rows var(--transition);
}
.accordion__panel > div { overflow: hidden; }
.accordion__panel.is-open { grid-template-rows: 1fr; }
.accordion__panel p { margin: 0; padding: 0 0 var(--space-5); color: var(--color-muted); }

/* Form */
.form { display: grid; gap: var(--space-4); }
.form__field { display: grid; gap: var(--space-2); }
.form label { font-weight: 600; }
.form input[type="text"], .form input[type="email"], .form textarea {
  width: 100%; padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-primary); border-radius: var(--radius);
  background: var(--color-background);
}
.form textarea { min-height: 9rem; resize: vertical; }

/* Kontakt */
#kontakt { background: var(--color-background); }
.contact-split { align-items: center; }
.contact-info {
  padding: var(--space-5);
  background: var(--color-background);
}
.contact-list {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.contact-list li { display: flex; align-items: center; }
.contact-list__icon {
  display: grid; place-items: center; width: 2.125rem; height: 2.125rem; flex: none;
  border-radius: var(--radius-round);
  background: var(--color-background);
  border: 1px solid var(--color-secondary);
  color: var(--color-primary);
  font-size: 0.85rem;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.contact-list li:hover .contact-list__icon {
  background: var(--color-sand);
  border-color: var(--color-primary);
  color: var(--color-button);
}
.contact-list a {
  display: inline-flex; gap: var(--space-3); align-items: center;
  font-family: var(--font-body); font-weight: 500; font-size: var(--text-base);
  color: var(--color-text); text-decoration: none;
  transition: color var(--transition);
}
.contact-list a:hover { color: var(--color-primary); }
.contact-media { display: flex; justify-content: center; }
.contact-photo {
  width: 100%; max-width: 22rem; aspect-ratio: 3 / 4;
  object-fit: cover; object-position: 50% 15%;
  box-shadow: var(--shadow-card);
}
.booking {
  padding: var(--space-5);
  background: var(--color-background);
  color: var(--color-text);
}
.booking__title { margin-bottom: var(--space-4); font-size: var(--h3); color: var(--color-text); }
.booking p { margin-bottom: var(--space-6); color: var(--color-text); }

/* Footer */
.footer {
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-button) 100%);
  color: var(--color-on-dark-muted);
  padding-block: var(--space-8) var(--space-5);
  text-align: center;
}
.footer__grid { display: grid; gap: var(--space-6); grid-template-columns: 1fr; justify-items: center; }
.footer h2 { margin-bottom: var(--space-4); font-size: var(--h5); color: var(--color-on-dark); }
.footer .logo { color: var(--color-on-dark); margin-bottom: var(--space-4); }
.footer__list { display: grid; gap: var(--space-2); }
.footer a { text-decoration: none; }
.footer a:hover { color: var(--color-on-dark); text-decoration: underline; }
.footer__legal {
  margin-top: var(--space-7); padding-top: var(--space-5);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  display: flex; flex-direction: column; align-items: center; gap: var(--space-2);
}
.footer__legal p { margin: 0; }
.footer__credit-line { font-size: 0.875rem; }
.footer a.footer__credit {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: rgba(233, 220, 216, 0.75);
}
.footer a.footer__credit:hover { text-decoration-color: var(--color-on-dark); }
.link-button { background: none; border: 0; padding: 0; cursor: pointer; text-decoration: underline; color: inherit; }

/* Cookie lišta */
.cookie {
  position: fixed; inset: auto var(--space-4) var(--space-4) var(--space-4); z-index: 300;
  max-width: 40rem; margin-left: auto;
  padding: var(--space-5);
  background: var(--color-button); color: var(--color-on-dark);
  border-radius: var(--radius); box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}
.cookie[hidden] { display: none; }
.cookie h2 { margin-bottom: var(--space-2); font-size: var(--h5); }
.cookie p { color: var(--color-on-dark-muted); }
.cookie a { color: var(--color-secondary); }
.cookie__settings { display: grid; gap: var(--space-3); margin-bottom: var(--space-4); }
.cookie__settings[hidden] { display: none; }
.cookie__settings label { display: flex; gap: var(--space-3); align-items: flex-start; }
.cookie__settings input { width: 1.25rem; height: 1.25rem; margin-top: 0.2rem; accent-color: var(--color-secondary); }
.cookie .btn { min-height: 3rem; padding-inline: var(--space-5); background: var(--color-secondary); border-color: var(--color-secondary); color: var(--color-button); }
.cookie .btn:hover { background: var(--color-on-dark); border-color: var(--color-on-dark); }
.cookie .btn--ghost { background: transparent; color: var(--color-on-dark); border-color: var(--color-secondary); }
.cookie .btn--ghost:hover { background: var(--color-primary); border-color: var(--color-primary); color: var(--color-on-dark); }

/* Chybová stránka */
.error-page { min-height: 100svh; display: grid; place-items: center; text-align: center; padding: var(--space-6); }
.error-page wa-icon { font-size: clamp(5rem, 3rem + 10vw, 10rem); color: var(--color-primary); }

/* 7. UTILITY -------------------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(1rem); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* 8. BREAKPOINTY (mobile-first) ------------------------------------------ */
@media (min-width: 600px) {
  .cards { grid-template-columns: repeat(2, 1fr); }  /* 4 karty = 2 + 2 */
}
@media (min-width: 768px) {
  .section { padding-block: var(--space-9); }
  .split { grid-template-columns: 1fr 2fr; gap: var(--space-8); }
  .accordion--two { grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
  .split--thirds { grid-template-columns: 1fr 1fr 1fr; }
}
@media (min-width: 992px) {
  .nav-toggle { display: none; }
  .nav {
    position: static; display: flex; flex-direction: row; align-items: center; gap: var(--space-6);
    padding: 0; border: 0; background: none;
  }
  .nav .btn { margin: 0; min-height: 3rem; padding-inline: var(--space-5); }
  .hero__inner {
    grid-template-columns: 5fr 7fr; align-items: center; gap: var(--space-8);
    min-height: calc(100svh - var(--header-h)); padding-block: var(--space-8) 0;
  }
  .hero { background: linear-gradient(to right, var(--color-primary) 0 28%, var(--color-background) 28% 100%); }
  .hero__media { margin: 0; padding: 0; background: none; align-self: end; }
  .hero__photo { max-width: none; margin: 0; aspect-ratio: 3 / 4.1; }
  .hero__content { padding: 0 0 var(--space-8) var(--space-5); }
  .cta-band__title { text-align: right; margin-left: auto; max-width: 20ch; }
  .cta-band .btn-row { justify-content: flex-end; }
}
@media (min-width: 1400px) {
  :root { --header-h: 5rem; }
  .section { padding-block: 8rem; }
}
/* 4K a velké monitory – škáluje celý rem systém */
@media (min-width: 2200px) {
  html { font-size: 125%; }
}
@media (min-width: 3200px) {
  html { font-size: 175%; }
}
@media (max-width: 599px) {
  .cookie { inset: auto var(--space-2) var(--space-2) var(--space-2); }
  .btn-row .btn, .cookie .btn { flex: 1 1 100%; }
}

/* Loga společností (Reference) */
.logo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6) var(--space-7);
  align-items: center;
  justify-items: center;
}
.logo-grid__item {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #4f4f4f;
  opacity: 0.78;
  transition: opacity var(--transition), color var(--transition);
}
.logo-grid__item:hover {
  color: var(--color-text);
  opacity: 1;
}
.logo-grid__item svg, .logo-grid__item img {
  width: auto;
  height: 2.75rem;
  max-width: 10.5rem;
  object-fit: contain;
}
@media (min-width: 768px) {
  .logo-grid { grid-template-columns: repeat(4, 1fr); }
}
#reference { padding-top: 0; padding-bottom: 7.5rem; }

/* Tlačítko Zpět nahoru */
.back-to-top {
  position: fixed;
  right: var(--space-5);
  bottom: var(--space-5);
  z-index: 90;
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0;
  background: var(--color-primary);
  color: var(--color-on-dark);
  font-size: 1rem;
  text-decoration: none;
  box-shadow: var(--shadow-card);
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.5rem);
  transition: opacity var(--transition), transform var(--transition), background var(--transition), visibility var(--transition);
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover { background: var(--color-button); }

/* Doplňky */
.card--quote, .accordion__heading { margin: 0; }
.section--dark .lead { color: var(--color-on-dark-muted); }
.hero__content .lead { color: var(--color-muted); }

.hero__photo, .about-head__photo { object-position: 50% 15%; }