/* ==========================================================================
   Design Engine & CSS Tokens
   ========================================================================== */
:root {
  --slideshow-duration: 16s;
  
  --color-bg: #0a0a0a;
  --color-surface: #141414;
  --color-text-primary: #f5f5f7;
  --color-text-muted: #86868b;
  --color-overlay: rgba(0, 0, 0, 0.15);
  --color-glass: rgba(18, 18, 18, 0.75);
  --color-glass-border: rgba(255, 255, 255, 0.12);
  --color-focus: #3b82f6;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --logo-max-width: clamp(200px, 25vw, 310px);
  --hero-padding: clamp(1.5rem, 5vw, 4rem);
  --site-padding: clamp(1.25rem, 4vw, 3.5rem);
}

/* ==========================================================================
   Resets & A11y Base
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-family);
  overflow: hidden;
}

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

button {
  background: none;
  border: none;
  font-family: inherit;
  cursor: pointer;
}

/* Tillgänglighet: Tydlig fokusram för skärmläsare och tangentbord */
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

/* Skip-link för tangentbordsanvändare (dold tills den fokuseras) */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: #ffffff;
  color: #000000;
  padding: 0.75rem 1.25rem;
  border-radius: 4px;
  font-weight: 600;
  z-index: 1000;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

/* Respektera användare som föredrar minskad rörelse (WCAG 2.3.3) */
@media (prefers-reduced-motion: reduce) {
  .slide {
    animation: none !important;
    opacity: 0;
  }
  .slide-1 {
    opacity: 1 !important;
  }
}

/* ==========================================================================
   Hero & Slideshow Layout
   ========================================================================== */
.hero-wrapper {
  position: relative;
  width: 100%;
  height: 100svh;
  overflow: hidden;
}

.slideshow-container {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
  width: 100%;
  height: 100%;
}

.slide {
  grid-area: 1 / 1;
  width: 100%;
  height: 100%;
  opacity: 0;
  animation: seamless-fade var(--slideshow-duration) ease-in-out infinite both;
  will-change: opacity;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.slide-1 { animation-delay: 0s; }
.slide-2 { animation-delay: 4s; }
.slide-3 { animation-delay: 8s; }
.slide-4 { animation-delay: 12s; }

@keyframes seamless-fade {
  0%   { opacity: 0; }
  5%   { opacity: 1; }
  25%  { opacity: 1; }
  30%  { opacity: 0; }
  100% { opacity: 0; }
}

.hero-overlay-content {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--hero-padding);
  background-color: var(--color-overlay);
  pointer-events: none;
  z-index: 10;
}

.hero-logo {
  width: 100%;
  max-width: var(--logo-max-width);
  height: auto;
  user-select: none;
}

/* ==========================================================================
   UI-triggers (Kontaktknapp)
   ========================================================================== */
.hero-ui-bar {
  position: absolute;
  bottom: var(--site-padding);
  right: var(--site-padding);
  z-index: 20;
}

.btn-contact-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--color-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-glass-border);
  color: var(--color-text-primary);
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: transform 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
}

.btn-contact-pill:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}