/* SIEVERT CONSULTING — CSS základ pro Claude, 14. 10. 2026
   POUŽITÍ: načti tento soubor po resetu/frameworku. Na <body> dej class="sc-site".
   Prefix sc- omezuje kolize. Nepoužívej paralelní utility přepisující stejné styly.
   Barvy #AB4E9D a #CB9AC6 jsou nejčastější neprůhledné fialové pixely dodaného loga.
   Tmavší #853577 je doplňkový odstín pro kontrastní tlačítka a odkazy.
   Logo použij jako původní PNG; bez filtrů, přebarvení a ořezání.
   Font: systémový sans-serif bez externích požadavků. Volitelně lokální Inter.

   HTML KONTRAKT (zkrácený příklad):
   <body class="sc-site">
     <a class="sc-skip" href="#main">Přejít na obsah</a>
     <header class="sc-header"><div class="sc-container sc-header__inner">
       <a href="/" class="sc-logo"><img src="logo_png-1024x376.png"
         width="1024" height="376" alt="Sievert Consulting – úvod"></a>
       <nav class="sc-nav" aria-label="Hlavní navigace">
         <a href="#expertiza">Expertíza</a><a href="#projekty">Projekty</a>
         <a href="#o-spolecnosti">O společnosti</a>
         <a href="#kontakt" class="sc-button sc-button--outline">Proberme váš projekt ↗</a>
       </nav>
     </div></header>
     <main id="main" tabindex="-1">
       <section class="sc-hero sc-container">
         <div class="sc-hero__content"><p class="sc-eyebrow">Technologický partner</p>
           <h1>Propojujeme business, data a technologie<span class="sc-accent">.</span></h1>
           <p class="sc-lead">Hledáme souvislosti. Navrhujeme řešení. Pomáháme je uvést do praxe.</p>
           <div class="sc-actions"><a class="sc-button" href="#kontakt">Proberme váš projekt ↗</a>
             <a class="sc-link" href="#projekty">Naše zkušenosti</a></div>
           <p class="sc-caption">Od první otázky k funkčnímu řešení.</p>
         </div>
         <figure class="sc-hero__visual"><img src="hero.webp" alt="" width="900" height="900"></figure>
       </section>
       <section class="sc-section sc-section--dark" id="expertiza"><div class="sc-container">
         <h2>Složitá zadání. Srozumitelná řešení.</h2>
         <div class="sc-services">[3× article.sc-service s .sc-service__number,
           svg.sc-icon (aria-hidden="true"), h3 a p]</div>
       </div></section>
       <section class="sc-section" id="projekty"><div class="sc-container">
         <div class="sc-section-heading"><div><p class="sc-eyebrow">Vybrané projekty</p>
           <h2>Zkušenosti z reálných projektů.</h2></div><p class="sc-muted">Úvod k projektům.</p></div>
         <div class="sc-projects">[2× article.sc-project obsahující a.sc-project__link,
           figure.sc-project__media > img, .sc-project__title > h3, p.sc-muted,
           případně span.sc-tag pro označení Prototyp / Ilustrace]</div>
       </div></section>
       <section class="sc-section sc-section--soft"><div class="sc-container">
         <h2>Jak pracujeme</h2><ol class="sc-steps">[4× li > h3 + p]</ol>
       </div></section>
       <section class="sc-section sc-container sc-about" id="o-spolecnosti">
         <div>[h2 + text o společnosti]</div><div>[ověřené zkušenosti; případně skutečná fotografie]</div>
       </section>
       <section class="sc-section sc-section--dark" id="kontakt"><div class="sc-container sc-contact">
         <div>[h2 + kontaktní odkazy]</div><form class="sc-form">
           <div class="sc-field"><label for="email">E-mail</label>
             <input id="email" name="email" type="email" autocomplete="email" required></div>
           [další .sc-field s label, input nebo textarea; .sc-form__row pro dvojici polí]
           <p class="sc-field-help">[informace k formuláři]</p>
           <button class="sc-button" type="submit">Odeslat zprávu ↗</button>
           <p class="sc-form-status" role="status" aria-live="polite"></p>
         </form></div></section>
     </main><footer class="sc-footer"><div class="sc-container sc-footer__inner">[údaje a odkazy]</div></footer>
   </body>

   IMPLEMENTAČNÍ POZNÁMKY:
   - Hranaté závorky výše jsou instrukce, ne obsah k publikování.
   - Navigace se na mobilu zalomí a zůstává dostupná bez JS; žádný nefunkční hamburger.
   - CSS nevytváří 3D ilustraci. Dodej samostatný obrázek nebo SVG, nepoužívej screenshot celého webu.
   - Neuváděj smyšlené reference ani metriky. Ilustrace odliš od skutečných projektových screenshotů.
   - Formulář vyžaduje backend, validaci a ochranu proti spamu; bez backendu použij kontaktní odkazy.
   - Chyba pole: aria-invalid="true", aria-describedby odkazující na .sc-field-error.
   - CSS je integrační základ, ne kompletní web. Před produkcí ověř reálný obsah a layout.
*/

.sc-site {
  --sc-brand: #ab4e9d;
  --sc-brand-light: #cb9ac6;
  --sc-brand-action: #853577;
  --sc-brand-hover: #6f2963;
  --sc-bg: #f7f6f8;
  --sc-surface: #fff;
  --sc-soft: #eee9ef;
  --sc-ink: #16161b;
  --sc-muted: #62616b;
  --sc-dark: #202024;
  --sc-on-dark: #f7f6f8;
  --sc-muted-dark: #cfccd3;
  --sc-line: #d9d4dc;
  --sc-error: #a12639;
  --sc-max: 1280px;
  --sc-gutter: clamp(20px, 5vw, 72px);
  --sc-section: clamp(56px, 7vw, 104px);
  --sc-radius: 4px;
  --sc-font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin: 0;
  background: var(--sc-bg);
  color: var(--sc-ink);
  font: 400 1rem/1.65 var(--sc-font);
  -webkit-font-smoothing: antialiased;
}
.sc-site *, .sc-site *::before, .sc-site *::after { box-sizing: border-box; }
.sc-site :where(h1,h2,h3,p,figure) { margin: 0; }
.sc-site :where(img,svg) { display: block; max-width: 100%; }
.sc-site img { height: auto; }
.sc-site :where(button,input,textarea,select) { font: inherit; }
.sc-site a { color: inherit; text-underline-offset: .25em; }
.sc-site :where(h1,h2,h3) { line-height: 1.1; font-weight: 650; letter-spacing: -.045em; overflow-wrap: break-word; }
.sc-site h1 { font-size: clamp(2.6rem, 5.5vw, 5.6rem); line-height: 1.04; }
.sc-site h2 { font-size: clamp(2rem, 3.4vw, 3.25rem); }
.sc-site h3 { font-size: clamp(1.2rem, 1.6vw, 1.55rem); letter-spacing: -.025em; line-height: 1.25; }
.sc-site :where(section,main)[id] { scroll-margin-top: 24px; }
.sc-site :focus-visible { outline: 3px solid var(--sc-brand-action); outline-offset: 5px; }
.sc-site ::selection { background: var(--sc-brand-light); color: var(--sc-ink); }
.sc-site [hidden] { display: none !important; }
.sc-container { width: min(var(--sc-max), calc(100% - 2 * var(--sc-gutter))); margin-inline: auto; }
.sc-section { padding-block: var(--sc-section); }
.sc-section--soft { background: var(--sc-soft); }
.sc-section--dark { background: var(--sc-dark); color: var(--sc-on-dark); --sc-muted: var(--sc-muted-dark); --sc-line: #55515c; }
.sc-section--dark :focus-visible { outline-color: var(--sc-brand-light); }
.sc-muted { color: var(--sc-muted); }
.sc-accent { color: var(--sc-brand); }
.sc-eyebrow { font-size: .72rem; line-height: 1.6; letter-spacing: .17em; text-transform: uppercase; color: var(--sc-muted); margin-bottom: 24px; }
.sc-lead { color: var(--sc-muted); font-size: clamp(1.1rem, 1.6vw, 1.35rem); line-height: 1.6; max-width: 46ch; }
.sc-skip { position: fixed; top: 10px; left: 16px; z-index: 100; padding: 12px 20px; background: var(--sc-surface); transform: translateY(-180%); }
.sc-skip:focus { transform: translateY(0); }
.sc-header { background: var(--sc-bg); }
.sc-header__inner { min-height: 112px; display: flex; align-items: center; justify-content: space-between; gap: 32px; padding-block: 18px; }
.sc-logo { display: block; flex: 0 0 auto; width: clamp(170px, 20vw, 250px); }
.sc-logo img { width: 100%; object-fit: contain; }
.sc-nav { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 12px 28px; font-size: .875rem; }
.sc-nav > a { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; }
.sc-nav > a:not(.sc-button):hover { color: var(--sc-brand-action); text-decoration: underline; }
.sc-nav [aria-current="page"] { text-decoration: underline; text-decoration-color: var(--sc-brand); }
.sc-button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 12px; padding: 12px 24px; border: 1px solid transparent; border-radius: var(--sc-radius); background: var(--sc-brand-action); color: #fff !important; font-weight: 600; font-size: .9rem; line-height: 1.5; text-align: center; text-decoration: none; cursor: pointer; transition: background-color .18s, border-color .18s; }
.sc-button:hover { background: var(--sc-brand-hover); }
.sc-button--outline { background: transparent; border-color: var(--sc-brand-action); color: var(--sc-brand-action) !important; border-radius: 999px; }
.sc-button--outline:hover { background: var(--sc-soft); }
.sc-section--dark .sc-button--outline { border-color: var(--sc-brand-light); color: var(--sc-brand-light) !important; }
.sc-section--dark .sc-button--outline:hover { background: #343039; }
.sc-button:disabled { opacity: .55; cursor: not-allowed; }
.sc-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--sc-brand-action) !important; font-weight: 550; text-decoration: underline; }
.sc-section--dark .sc-link { color: var(--sc-brand-light) !important; }
.sc-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 16px 28px; margin-top: 32px; }
.sc-hero { display: grid; grid-template-columns: 1.04fr 1fr; align-items: center; gap: clamp(24px, 4vw, 64px); padding-block: 44px 64px; }
.sc-hero__content { position: relative; z-index: 1; min-width: 0; }
.sc-hero .sc-lead { margin-top: 28px; }
.sc-hero__visual { min-width: 0; }
.sc-hero__visual img { width: 100%; object-fit: contain; }
.sc-caption { display: flex; align-items: center; gap: 16px; margin-top: 48px; font-size: .8rem; color: var(--sc-muted); }
.sc-caption::before { content: ""; width: 32px; height: 1px; background: currentColor; flex-shrink: 0; }
.sc-services { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 36px; margin-top: 48px; }
.sc-service { border-left: 1px solid var(--sc-line); padding-left: 24px; }
.sc-service__number { color: var(--sc-brand-light); font-size: .75rem; margin-bottom: 16px; }
.sc-icon { width: 56px; height: 56px; color: var(--sc-brand-light); fill: none; stroke: currentColor; stroke-width: 1.25; margin-bottom: 24px; }
.sc-service p { margin-top: 16px; color: var(--sc-muted); max-width: 36ch; }
.sc-section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; margin-bottom: 36px; }
.sc-section-heading > p { max-width: 34ch; }
.sc-projects { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
.sc-project__link { display: block; text-decoration: none; }
.sc-project__media { overflow: hidden; aspect-ratio: 16/9; background: var(--sc-soft); }
.sc-project__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.sc-project__title { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-top: 20px; }
.sc-project__title::after { content: "↗"; color: var(--sc-brand-action); }
.sc-project p { margin-top: 10px; max-width: 58ch; }
.sc-tag { display: inline-block; border: 1px solid var(--sc-line); border-radius: 999px; padding: 3px 10px; margin-top: 14px; font-size: .75rem; color: var(--sc-muted); }
.sc-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; counter-reset: step; list-style: none; padding: 0; margin: 44px 0 0; }
.sc-steps > li { counter-increment: step; border-top: 1px solid var(--sc-line); padding-top: 20px; }
.sc-steps > li::before { content: counter(step, decimal-leading-zero); display: block; color: var(--sc-brand-action); font-size: .85rem; margin-bottom: 24px; }
.sc-steps p { color: var(--sc-muted); margin-top: 14px; }
.sc-about, .sc-contact { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 88px); }
.sc-about p, .sc-contact p { margin-top: 18px; }
.sc-about img { width: 100%; object-fit: cover; }
.sc-contact a:not(.sc-button) { overflow-wrap: anywhere; }
.sc-form { display: grid; gap: 20px; align-content: start; }
.sc-form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.sc-field { display: grid; gap: 8px; min-width: 0; }
.sc-field label { font-size: .875rem; font-weight: 550; }
.sc-field :where(input,textarea,select) { width: 100%; min-height: 48px; padding: 12px 14px; border: 1px solid #aaa4af; border-radius: var(--sc-radius); background: var(--sc-surface); color: var(--sc-ink); }
.sc-field textarea { min-height: 144px; resize: vertical; }
.sc-field :where(input,textarea)::placeholder { color: #6b6571; opacity: 1; }
.sc-field [aria-invalid="true"] { border: 2px solid var(--sc-error); }
.sc-field-help, .sc-form-status { font-size: .8rem; color: var(--sc-muted); }
.sc-field-error { color: var(--sc-error); font-size: .85rem; }
.sc-section--dark .sc-field-error { color: #ffb8c3; }
.sc-form .sc-button { justify-self: start; }
.sc-footer { border-top: 1px solid var(--sc-line); padding-block: 28px; font-size: .8rem; color: var(--sc-muted); }
.sc-footer__inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px 32px; }
@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .sc-project__link:hover .sc-project__media img { transform: scale(1.025); }
}
@media (max-width: 1050px) {
  .sc-header__inner { align-items: flex-start; }
  .sc-nav { gap: 8px 18px; }
  .sc-hero { grid-template-columns: 1.1fr 1fr; gap: 24px; }
  .sc-services { gap: 24px; }
  .sc-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .sc-header__inner { flex-direction: column; gap: 16px; }
  .sc-nav { justify-content: flex-start; width: 100%; }
  .sc-nav .sc-button { padding: 8px 16px; }
  .sc-hero { grid-template-columns: 1fr; padding-top: 32px; }
  .sc-hero__visual { width: min(100%, 540px); justify-self: center; }
  .sc-caption { margin-top: 32px; }
  .sc-services, .sc-projects, .sc-about, .sc-contact { grid-template-columns: 1fr; }
  .sc-service { padding-block: 8px; }
  .sc-service p { max-width: 60ch; }
  .sc-section-heading { align-items: flex-start; flex-direction: column; gap: 20px; }
  .sc-section-heading > p { max-width: 60ch; }
  .sc-projects { gap: 36px; }
}
@media (max-width: 440px) {
  .sc-steps, .sc-form__row { grid-template-columns: 1fr; }
  .sc-actions { align-items: stretch; flex-direction: column; gap: 12px; }
  .sc-actions .sc-link { align-self: flex-start; }
  .sc-form .sc-button { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  .sc-site *, .sc-site *::before, .sc-site *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}
@media print {
  .sc-site { background: #fff; color: #000; }
  .sc-header, .sc-form, .sc-actions, .sc-skip { display: none; }
  .sc-container { width: 100%; }
  .sc-section { padding-block: 24px; }
  .sc-section--dark { background: #fff; color: #000; --sc-muted: #444; }
  .sc-project, .sc-service { break-inside: avoid; }
}