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

:root {
  --bg: #ffffff;
  --bg-subtle: #fafafa;
  --fg: #14151a;
  --fg-muted: #5c616d;
  --accent: #0f766e;
  --accent-hover: #0d9488;
  --accent-dim: rgba(15, 118, 110, 0.25);
  --grid: rgba(0, 0, 0, 0.06);
  --footer-h: clamp(4.5rem, 12vw, 5.5rem);
  --carousel-line: 1.35;
  --carousel-duration: 0.55s;
  --carousel-interval: 2800ms;
  --header-border: rgba(0, 0, 0, 0.08);
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  font-family: "Noto Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--fg);
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: center top;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s, background-color 0.2s, border-color 0.2s;
}

a:hover,
a:focus-visible {
  color: var(--accent-hover);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  padding:
    calc(1rem + env(safe-area-inset-top)) calc(1rem + env(safe-area-inset-right)) 0.75rem
    calc(1rem + env(safe-area-inset-left));
  border-bottom: 1px solid var(--header-border);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 100%;
}

.logo {
  display: inline-flex;
  align-items: center;
  font-family: "Noto Sans", system-ui, sans-serif;
  font-weight: 700;
  font-size: clamp(1.05rem, 3.8vw, 1.45rem);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg);
  text-decoration: none;
  line-height: 1.2;
  flex-shrink: 0;
}

.logo:hover,
.logo:focus-visible {
  color: var(--fg);
}

.header-kontakt {
  font-family: "Noto Sans", system-ui, sans-serif;
  font-weight: 600;
  font-size: clamp(0.8125rem, 2.2vw, 0.875rem);
  color: var(--fg);
  text-decoration: none;
  padding: 0.5rem 1rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--header-border);
  border-radius: 2px;
  background: var(--bg);
  box-shadow: rgba(0, 0, 0, 0.04) 0 1px 0;
  flex-shrink: 0;
}

.header-kontakt:hover,
.header-kontakt:focus-visible {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: var(--bg-subtle);
}

.header-kontakt[aria-current="page"] {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(15, 118, 110, 0.06);
}

.header-login {
  font-family: "Noto Sans", system-ui, sans-serif;
  font-weight: 600;
  font-size: clamp(0.8125rem, 2.2vw, 0.875rem);
  color: var(--accent);
  text-decoration: none;
  padding: 0.5rem 0.35rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.header-login:hover,
.header-login:focus-visible {
  color: var(--accent-hover);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--header-border);
  border-radius: 2px;
  overflow: hidden;
  background: var(--bg);
  box-shadow: rgba(0, 0, 0, 0.04) 0 1px 0;
}

.lang-switch-btn {
  font-family: "Noto Sans", system-ui, sans-serif;
  font-weight: 600;
  font-size: clamp(0.75rem, 2vw, 0.8125rem);
  min-height: 44px;
  min-width: 44px;
  padding: 0 0.65rem;
  border: 0;
  background: transparent;
  color: var(--fg-muted);
  cursor: pointer;
  transition: color 0.2s, background-color 0.2s;
}

.lang-switch-btn:hover,
.lang-switch-btn:focus-visible {
  color: var(--fg);
  background: var(--bg-subtle);
}

.lang-switch-btn.is-active {
  color: var(--accent);
  background: rgba(15, 118, 110, 0.08);
}

.lang-switch-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-main {
  flex: 1 1 0%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-left: max(1.25rem, env(safe-area-inset-left));
  padding-right: max(1.25rem, env(safe-area-inset-right));
}

.site-main--home {
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  padding-top: 0;
  padding-right: 0;
  padding-left: 0;
  padding-bottom: calc(var(--footer-h) + env(safe-area-inset-bottom));
}

.hero-section {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding:
    calc(4.25rem + env(safe-area-inset-top)) max(1.25rem, env(safe-area-inset-left)) 2rem
    max(1.25rem, env(safe-area-inset-right));
}

.hero {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: 0.35em 0.5em;
  max-width: 100%;
  font-size: clamp(1.75rem, 6vw, 3.25rem);
  transform: translateY(clamp(-4vh, -2.5rem, -1.5rem));
  text-align: center;
}

.hero-prefix {
  font-weight: 600;
  font-size: 1em;
  line-height: var(--carousel-line);
  letter-spacing: -0.02em;
}

.hero-carousel {
  position: relative;
  display: inline-block;
  vertical-align: bottom;
  font-size: 1em;
  height: calc(1em * var(--carousel-line));
  min-width: 0;
  width: max-content;
  max-width: 100%;
  overflow: hidden;
  text-align: left;
  border-bottom: 1px solid var(--accent-dim);
}

@media (max-width: 420px) {
  .hero {
    flex-direction: column;
    align-items: center;
    gap: 0.15em;
  }

  .hero-carousel {
    text-align: center;
    width: 100%;
    max-width: 100%;
  }
}

.hero-carousel-track {
  display: flex;
  flex-direction: column;
  will-change: transform;
  transition: transform var(--carousel-duration) cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-carousel-track.is-snapping {
  transition: none;
}

.hero-carousel-word {
  flex-shrink: 0;
  height: calc(1em * var(--carousel-line));
  display: flex;
  align-items: center;
  justify-content: flex-start;
  font-weight: 600;
  font-size: 1em;
  line-height: 1;
  color: var(--accent);
  white-space: nowrap;
}

@media (max-width: 420px) {
  .hero-carousel-word {
    justify-content: center;
    width: 100%;
  }
}

.projects-section {
  padding:
    clamp(3rem, 8vw, 5rem) max(1.25rem, env(safe-area-inset-left))
    clamp(3rem, 8vw, 5rem) max(1.25rem, env(safe-area-inset-right));
  max-width: 72rem;
  margin: 0 auto;
  width: 100%;
}

.projects-title {
  font-size: clamp(1.25rem, 3.5vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 clamp(1.5rem, 4vw, 2.5rem);
  text-align: center;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(0.75rem, 2.5vw, 1.5rem);
  max-width: 56rem;
  margin: 0 auto;
}

.project-card {
  aspect-ratio: 1 / 1;
  width: 100%;
  border: 1px solid var(--header-border);
  border-radius: 2px;
  background: var(--bg-subtle);
  box-shadow: rgba(255, 255, 255, 0.6) 0 0 0 1px inset;
}

@media (max-width: 640px) {
  .projects-grid {
    grid-template-columns: 1fr;
    max-width: 16rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --carousel-duration: 0.01ms;
  }

  .hero-carousel-track {
    transition: none;
  }

  .hero-carousel--fade .hero-carousel-word {
    transition: opacity 0.35s;
  }

  .hero-carousel-word.is-hidden {
    opacity: 0;
    height: 0;
    overflow: hidden;
    margin: 0;
    padding: 0;
  }
}

.site-footer {
  margin-top: auto;
  padding:
    1rem max(1.25rem, env(safe-area-inset-right)) calc(1rem + env(safe-area-inset-bottom))
    max(1.25rem, env(safe-area-inset-left));
  border-top: 1px solid var(--header-border);
  background: linear-gradient(180deg, transparent, var(--bg-subtle));
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 1.5rem;
  max-width: 48rem;
  margin: 0 auto;
  font-size: clamp(0.8125rem, 2.5vw, 0.875rem);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  justify-content: center;
}

.footer-links a {
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 0.35rem;
}

.footer-copy {
  color: var(--fg-muted);
  width: 100%;
  text-align: center;
  flex-basis: 100%;
  margin: 0;
}

@media (min-width: 480px) {
  :root {
    --grid: rgba(0, 0, 0, 0.055);
  }

  .site-main:not(.site-main--home) {
    padding-left: max(1.5rem, env(safe-area-inset-left));
    padding-right: max(1.5rem, env(safe-area-inset-right));
  }

  .hero-section {
    padding-left: max(1.5rem, env(safe-area-inset-left));
    padding-right: max(1.5rem, env(safe-area-inset-right));
  }

  .projects-section {
    padding-left: max(1.5rem, env(safe-area-inset-left));
    padding-right: max(1.5rem, env(safe-area-inset-right));
  }
}

@media (min-width: 768px) {
  body {
    background-size: 56px 56px;
  }

  .hero {
    font-size: clamp(2.25rem, 4.5vw, 3.5rem);
  }
}

@media (min-width: 1024px) {
  .site-header {
    padding-left: max(1.5rem, env(safe-area-inset-left));
    padding-right: max(1.5rem, env(safe-area-inset-right));
  }
}