/* =================================================================
   MB BAUSTELLE — Shared styles
   Palette, typography, nav, footer, grid, reusable components
   ================================================================= */

:root {
  /* Palette — industrial */
  --c-bg:         #0E0E0E;
  --c-bg-2:       #151514;
  --c-surface:    #1B1B1A;
  --c-surface-2:  #222221;
  --c-line:       rgba(244, 241, 236, 0.08);
  --c-line-2:     rgba(244, 241, 236, 0.16);
  --c-text:       #F4F1EC;
  --c-text-dim:   #A8A49D;
  --c-text-mute:  #6D6A64;
  --c-accent:     #E85D2F;       /* construction orange */
  --c-accent-dim: #B8451F;
  --c-steel:      #8A9099;
  --c-yellow:     #F5C946;       /* safety yellow — sparingly */
  --c-brick:      #8C3B1F;

  /* Brand-specific accents (per sub-brand) */
  --c-baustelle:  #E85D2F;       /* construction orange */
  --c-personalo:  #F5C946;       /* safety yellow */
  --c-adrijukas:  #8A9099;       /* steel */

  /* Typography */
  --f-display:    'Space Grotesk', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --f-body:       'Inter', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --f-mono:       'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --f-wordmark:   'Archivo Black', 'Arial Black', 'Helvetica Neue', system-ui, sans-serif;

  /* Scale */
  --fs-xs:    0.75rem;
  --fs-sm:    0.875rem;
  --fs-base:  1rem;
  --fs-md:    1.125rem;
  --fs-lg:    1.375rem;
  --fs-xl:    1.75rem;
  --fs-2xl:   2.25rem;
  --fs-3xl:   3rem;
  --fs-4xl:   4rem;
  --fs-5xl:   5.5rem;

  /* Space */
  --s-1:  0.25rem;
  --s-2:  0.5rem;
  --s-3:  0.75rem;
  --s-4:  1rem;
  --s-5:  1.5rem;
  --s-6:  2rem;
  --s-7:  3rem;
  --s-8:  4rem;
  --s-9:  6rem;
  --s-10: 8rem;

  /* Layout */
  --container:    1240px;
  --container-sm: 880px;
  --radius-sm:    4px;
  --radius:       8px;
  --radius-lg:    14px;

  /* Motion */
  --ease:         cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in:      cubic-bezier(0.55, 0, 0.7, 0.2);
  --dur-1:        0.2s;
  --dur-2:        0.4s;
  --dur-3:        0.7s;
  --dur-4:        1.1s;

  /* Elevation */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow:    0 10px 30px -12px rgba(0,0,0,0.65), 0 2px 6px rgba(0,0,0,0.4);
  --shadow-lg: 0 30px 80px -20px rgba(0,0,0,0.75), 0 4px 12px rgba(0,0,0,0.5);
}

/* ----------- Reset ----------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--f-body);
  font-size: var(--fs-base);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg, video, canvas { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; background: transparent; padding: 0; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6 { margin: 0; font-family: var(--f-display); font-weight: 600; letter-spacing: -0.01em; line-height: 1.1; }
p { margin: 0; }
::selection { background: var(--c-accent); color: var(--c-bg); }

/* ----------- Typographic helpers ----------- */
.eyebrow {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
}
.eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--c-accent);
}
.display {
  font-family: var(--f-display);
  font-size: clamp(2.25rem, 5.5vw, 4.75rem);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.025em;
}
.h2 {
  font-size: clamp(1.75rem, 3.2vw, 2.5rem);
  letter-spacing: -0.02em;
}
.h3 { font-size: var(--fs-xl); }
.text-dim { color: var(--c-text-dim); }
.text-mono { font-family: var(--f-mono); }

/* ----------- Layout ----------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}
.container-sm {
  max-width: var(--container-sm);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}
section { position: relative; padding-block: clamp(4rem, 9vw, 7rem); }
.grid { display: grid; gap: var(--s-6); }

/* ----------- Page shell frame (subtle crosshair corners) ----------- */
.page-frame {
  position: fixed;
  inset: 16px;
  pointer-events: none;
  border: 1px solid var(--c-line);
  z-index: 1;
}
.page-frame::before,
.page-frame::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--c-accent);
}
.page-frame::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.page-frame::after  { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }
@media (max-width: 640px) {
  .page-frame { inset: 8px; }
}

/* ----------- Nav ----------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(14, 14, 14, 0.78);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--c-line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--f-wordmark);
  font-weight: 400; /* Archivo Black is already heavy */
  letter-spacing: -0.02em;
  font-size: 1.5rem;
  color: var(--c-text);
  text-decoration: none;
}
.nav-logo svg {
  width: 20px;
  height: 36px;
  flex-shrink: 0;
  display: block;
}
.nav-logo span {
  line-height: 1;
  display: inline-block;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}
.nav-link {
  position: relative;
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  color: var(--c-text-dim);
  letter-spacing: 0.04em;
  transition: color var(--dur-1) var(--ease);
  padding-block: 6px;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur-2) var(--ease);
}
.nav-link:hover { color: var(--c-text); }
.nav-link:hover::after,
.nav-link.is-active::after { transform: scaleX(1); transform-origin: left; }
.nav-link.is-active { color: var(--c-text); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: 10px 18px;
  background: var(--c-accent);
  color: var(--c-bg);
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  transition: transform var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
}
.nav-cta:hover { transform: translateY(-1px); background: #FF6F42; }

/* Language toggle button (LT / EN) */
.lang-toggle {
  background: transparent;
  border: 1px solid var(--c-line-2);
  color: var(--c-text-dim);
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  padding: 6px 10px;
  border-radius: 3px;
  cursor: pointer;
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
  min-width: 38px;
}
.lang-toggle:hover { color: var(--c-accent); border-color: var(--c-accent); }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 10px;
  width: 20px;
  height: 1.5px;
  background: var(--c-text);
  transition: transform var(--dur-2) var(--ease), opacity var(--dur-1) var(--ease), top var(--dur-2) var(--ease);
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 19px; }
.nav-toggle span:nth-child(3) { top: 24px; }
.nav-toggle.is-open span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { top: 19px; transform: rotate(-45deg); }

@media (max-width: 880px) {
  /* Nav bar itself: solid dark background (not translucent) so the logo,
     hamburger, and language toggle are always readable against the hero. */
  .nav {
    background: #0E0E0E;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .nav-toggle { display: block; }
  /* The LT/EN toggle stays visible in the top bar on mobile (next to the
     hamburger) so it's reachable without opening the menu. */
  .nav-links .lang-toggle {
    position: fixed;
    top: 18px;
    right: 64px;
    z-index: 2;
    background: rgba(255, 255, 255, 0.04);
  }
  /* Slide-in menu panel: fully opaque, above any page content. */
  .nav-links {
    position: fixed;
    inset: 72px 0 0 0;
    flex-direction: column;
    justify-content: center;
    gap: var(--s-5);
    background: #0E0E0E;
    border-top: 1px solid var(--c-line);
    transform: translateX(100%);
    transition: transform var(--dur-3) var(--ease);
    padding: var(--s-6);
    z-index: 49;
  }
  .nav-links.is-open { transform: translateX(0); }
  .nav-link {
    font-size: var(--fs-lg);
    color: var(--c-text);
  }
  .nav-cta {
    font-size: var(--fs-base);
    padding: 14px 24px;
  }
  /* Hamburger bars: thicker + lighter so they're clearly visible on the
     mobile nav bar. */
  .nav-toggle span {
    height: 2px;
    background: var(--c-text);
  }
}

/* ----------- Footer ----------- */
.footer {
  border-top: 1px solid var(--c-line);
  padding-block: var(--s-8);
  background: var(--c-bg-2);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
  gap: var(--s-7);
}
.footer-col h4 {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-text-dim);
  margin-bottom: var(--s-4);
  font-weight: 500;
}
.footer-col ul li { margin-bottom: var(--s-2); }
.footer-col a {
  color: var(--c-text-dim);
  transition: color var(--dur-1) var(--ease);
  font-size: var(--fs-sm);
}
.footer-col a:hover { color: var(--c-accent); }
.footer-mark {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  margin-bottom: var(--s-4);
  font-family: var(--f-wordmark);
  font-weight: 400;
  letter-spacing: -0.02em;
  font-size: 1.625rem;
}
.footer-mark svg { width: 22px; height: 40px; flex-shrink: 0; display: block; }
.footer-mark span { line-height: 1; }
.footer-tagline { color: var(--c-text-dim); font-size: var(--fs-sm); max-width: 24ch; }
.footer-bottom {
  border-top: 1px solid var(--c-line);
  margin-top: var(--s-7);
  padding-top: var(--s-5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--s-3);
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--c-text-mute);
  letter-spacing: 0.06em;
}
@media (max-width: 880px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ----------- Buttons ----------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  padding: 14px 22px;
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: transform var(--dur-1) var(--ease), background var(--dur-1) var(--ease), color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
  border: 1px solid transparent;
}
.btn-primary { background: var(--c-accent); color: var(--c-bg); }
.btn-primary:hover { transform: translateY(-2px); background: #FF6F42; }
.btn-ghost { border-color: var(--c-line-2); color: var(--c-text); }
.btn-ghost:hover { border-color: var(--c-accent); color: var(--c-accent); }
.btn .arrow { transition: transform var(--dur-2) var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

/* ----------- Reveal ----------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-3) var(--ease), transform var(--dur-3) var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ----------- Cards ----------- */
.brand-card {
  position: relative;
  padding: var(--s-6);
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--dur-2) var(--ease), transform var(--dur-2) var(--ease);
  display: flex;
  flex-direction: column;
  min-height: 260px;
}
.brand-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(600px circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--brand, var(--c-accent)) 18%, transparent), transparent 60%);
  opacity: 0;
  transition: opacity var(--dur-2) var(--ease);
  pointer-events: none;
}
.brand-card:hover { border-color: color-mix(in srgb, var(--brand, var(--c-accent)) 60%, transparent); transform: translateY(-4px); }
.brand-card:hover::before { opacity: 1; }
.brand-card-index {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--c-text-mute);
  letter-spacing: 0.12em;
}
.brand-card h3 {
  font-size: var(--fs-xl);
  margin-top: var(--s-4);
  margin-bottom: var(--s-3);
}
.brand-card .brand-card-desc {
  color: var(--c-text-dim);
  font-size: var(--fs-sm);
  margin-bottom: var(--s-5);
  flex: 1;
}
.brand-card .brand-card-link {
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand, var(--c-accent));
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
}
.brand-card .brand-card-link .arrow { transition: transform var(--dur-2) var(--ease); }
.brand-card:hover .brand-card-link .arrow { transform: translateX(4px); }

/* ----------- Service card ----------- */
.svc-card {
  padding: var(--s-6);
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  transition: border-color var(--dur-2) var(--ease), transform var(--dur-2) var(--ease);
}
.svc-card:hover { border-color: var(--c-line-2); transform: translateY(-2px); }
.svc-card .svc-num {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--c-accent);
  letter-spacing: 0.15em;
}
.svc-card h4 {
  font-size: var(--fs-lg);
  margin-top: var(--s-3);
  margin-bottom: var(--s-3);
}
.svc-card p {
  color: var(--c-text-dim);
  font-size: var(--fs-sm);
}

/* ----------- Trust strip ----------- */
.trust-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--s-6);
  padding-block: var(--s-6);
  border-block: 1px solid var(--c-line);
}
.trust-item .trust-num {
  font-family: var(--f-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}
.trust-item .trust-lbl {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  margin-top: var(--s-2);
}

/* ----------- Section header ----------- */
.section-head { display: flex; flex-direction: column; gap: var(--s-4); margin-bottom: var(--s-7); max-width: 720px; }
.section-head.center { text-align: center; margin-inline: auto; align-items: center; }

/* ----------- CTA strip ----------- */
.cta-strip {
  padding: clamp(2.5rem, 6vw, 5rem);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(1000px circle at 0% 0%, rgba(232, 93, 47, 0.12), transparent 45%),
    radial-gradient(800px circle at 100% 100%, rgba(245, 201, 70, 0.08), transparent 45%),
    var(--c-surface);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-6);
}
.cta-strip h2 { font-size: clamp(1.75rem, 3.4vw, 2.75rem); max-width: 20ch; letter-spacing: -0.02em; }
.cta-strip p { color: var(--c-text-dim); margin-top: var(--s-3); max-width: 42ch; font-size: var(--fs-md); }

/* ----------- Accessibility ----------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: -999px;
}
.skip-link:focus {
  left: var(--s-4);
  top: var(--s-4);
  z-index: 100;
  background: var(--c-accent);
  color: var(--c-bg);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
}
:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ----------- Reduced motion ----------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}