/* =============================================================
   Berk GmbH 2026 — Industrie-B2B Design-System
   ============================================================= */

:root {
  --bg:           #FAFBFC;
  --bg-alt:       #F2F4F6;
  --bg-dark:      #14181D;
  --bg-darker:    #0C0F12;
  --surface:      #FFFFFF;
  --surface-alt:  #F8FAFB;

  --ink:          #14181D;
  --ink-soft:     #4A5158;
  --ink-muted:    #818992;
  --ink-soft-on-dark: rgba(255,255,255,.78);
  --ink-mute-on-dark: rgba(255,255,255,.55);

  --border:        #DFE3E8;
  --border-strong: #B8BFC7;
  --border-dark:   rgba(255,255,255,.10);

  --accent:        #00B4C5;
  --accent-2:      #00D4E8;
  --accent-dark:   #008A95;
  --accent-bg:     rgba(0,180,197,.09);
  --accent-glow:   rgba(0,180,197,.35);
  --accent-glow-soft: rgba(0,180,197,.18);

  --steel:         #2A3038;
  --warning:       #E89F00;
  --success:       #1F9F66;
  --danger:        #C84133;

  --shadow-sm: 0 1px 2px rgba(15, 23, 32, .04), 0 1px 1px rgba(15, 23, 32, .03);
  --shadow-md: 0 4px 16px rgba(15, 23, 32, .06), 0 2px 6px rgba(15, 23, 32, .03);
  --shadow-lg: 0 24px 48px rgba(15, 23, 32, .10), 0 8px 16px rgba(15, 23, 32, .04);
  --shadow-xl: 0 36px 80px rgba(15, 23, 32, .14);

  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --container: 1240px;
  --header-h: 76px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
*::selection { background: var(--accent); color: white; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: var(--header-h); }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, video { max-width: 100%; display: block; }
img { height: auto; }
a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent-dark); }
button { font: inherit; cursor: pointer; }
input, select, textarea, button { font-family: inherit; }
hr { border: none; border-top: 1px solid var(--border); }

/* ================== Layout ================== */
.bk-container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.bk-section { padding: 96px 0; position: relative; }
.bk-section-sm { padding: 64px 0; }
.bk-section-dark { background: var(--bg-dark); color: white; }
.bk-section-alt { background: var(--bg-alt); }
.bk-section-head { max-width: 800px; margin: 0 auto 56px; text-align: center; }
.bk-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 900px) {
  .bk-section { padding: 64px 0; }
  .bk-grid-2 { grid-template-columns: 1fr; gap: 36px; }
}

/* ================== Typography ================== */
.bk-h1 {
  font-size: clamp(40px, 6vw, 78px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  font-weight: 900;
}
.bk-h2 {
  font-size: clamp(30px, 3.6vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 800;
}
.bk-h3 {
  font-size: clamp(20px, 2vw, 26px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 700;
}
.bk-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  background: var(--accent-bg);
  border: 1px solid var(--accent-glow-soft);
  border-radius: 100px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.bk-eyebrow-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.bk-section-sub {
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 720px;
  margin: 16px auto 0;
}
.bk-section-dark .bk-section-sub { color: var(--ink-soft-on-dark); }
.bk-section-dark .bk-eyebrow {
  background: rgba(0,180,197,.16);
  border-color: rgba(0,180,197,.4);
  color: var(--accent-2);
}
.bk-mono { font-family: var(--mono); }

/* ================== Buttons ================== */
.bk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all .25s cubic-bezier(.22,1.36,.39,1);
  white-space: nowrap;
}
.bk-btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 6px 20px var(--accent-glow), inset 0 -2px 0 var(--accent-dark);
}
.bk-btn-primary:hover {
  background: var(--accent-dark);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 12px 28px var(--accent-glow), inset 0 -2px 0 var(--accent-dark);
}
.bk-btn-ghost {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--border);
}
.bk-btn-ghost:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.bk-btn-dark {
  background: var(--bg-dark);
  color: white;
}
.bk-btn-dark:hover { background: var(--steel); color: white; }
.bk-btn-on-dark {
  background: white;
  color: var(--ink);
}
.bk-btn-on-dark:hover { background: rgba(255,255,255,.92); color: var(--ink); }
.bk-btn-lg { padding: 16px 28px; font-size: 15px; }
.bk-btn-block { width: 100%; }

/* ================== Header ================== */
.bk-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--border);
  transition: margin-top .35s cubic-bezier(.22,.94,.41,1), opacity .25s, box-shadow .2s, background .2s;
}
body.bk-no-header .bk-header {
  margin-top: calc(-1 * var(--header-h));
  opacity: 0;
  pointer-events: none;
}
body.bk-no-header { scroll-padding-top: 0 !important; }
html.bk-no-header-html { scroll-padding-top: 0 !important; }

/* Fullscreen Toggle */
.bk-fs-toggle {
  position: fixed;
  top: 14px;
  right: 14px;
  z-index: 200;
  width: 36px; height: 36px;
  background: rgba(255, 255, 255, .92);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  color: var(--ink-soft);
  padding: 0;
  transition: all .2s, transform .35s cubic-bezier(.22,.94,.41,1);
}
.bk-fs-toggle:hover {
  color: var(--ink);
  box-shadow: var(--shadow-md);
  transform: scale(1.06);
}
.bk-fs-toggle .bk-fs-icon-show { display: none; }
body.bk-no-header .bk-fs-toggle {
  background: rgba(20, 24, 29, .85);
  color: white;
  border-color: rgba(255, 255, 255, .15);
  backdrop-filter: blur(8px);
}
body.bk-no-header .bk-fs-toggle .bk-fs-icon-hide { display: none; }
body.bk-no-header .bk-fs-toggle .bk-fs-icon-show { display: block; }
.bk-header.is-scrolled {
  box-shadow: 0 4px 16px rgba(15, 23, 32, .04);
}
.bk-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 24px;
}
.bk-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: -0.02em;
}
.bk-logo:hover { color: var(--ink); }
.bk-logo-mark {
  width: 38px; height: 38px;
  background: var(--bg-dark);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.02em;
  box-shadow: 0 4px 12px rgba(15, 23, 32, .12), inset 0 -2px 0 rgba(255,255,255,.05);
}
.bk-logo-img {
  height: 44px;
  width: auto;
  display: block;
  transition: transform .2s;
}
.bk-logo:hover .bk-logo-img { transform: translateY(-1px); }
.bk-logo-img-footer {
  height: 56px;
  width: auto;
  display: block;
}
.bk-logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.bk-logo-text small {
  font-size: 10px;
  font-weight: 600;
  color: var(--ink-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 2px;
}
.bk-nav-list {
  list-style: none;
  display: flex;
  gap: 32px;
}
.bk-nav-list a {
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 600;
  position: relative;
  transition: color .2s;
  text-align: center;
  min-width: 88px;
}
.bk-nav-list a:hover, .bk-nav-list a.is-active { color: var(--ink); }
.bk-nav-list a::after {
  content: '';
  position: absolute;
  bottom: -8px; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width .25s;
}
.bk-nav-list a:hover::after, .bk-nav-list a.is-active::after { width: 100%; }
.bk-header-cta-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Language Switcher */
.bk-lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 100px;
}
.bk-lang {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-muted);
  border-radius: 100px;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: all .2s;
}
.bk-lang:hover { color: var(--ink); background: rgba(255,255,255,.55); }
.bk-lang.is-active {
  background: white;
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(15, 23, 32, .08);
}
@media (max-width: 1024px) {
  .bk-lang-switch { display: none; }
}
.bk-nav-mobile-lang {
  display: flex !important;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--bg-alt);
  border-radius: 8px;
  color: var(--ink) !important;
  font-weight: 600 !important;
  font-size: 14px !important;
}
.bk-nav-mobile-lang::after { display: none !important; }
.bk-header-phone {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-soft);
  font-weight: 600;
}
.bk-header-phone strong { color: var(--ink); font-weight: 700; }
.bk-header-phone:hover { color: var(--accent); }
.bk-menu-toggle {
  display: none;
  width: 40px; height: 40px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.bk-menu-toggle span { display: block; width: 18px; height: 2px; background: var(--ink); border-radius: 2px; }
.bk-nav-cta-mobile { display: none; }

@media (max-width: 1024px) {
  .bk-nav, .bk-header-phone, .bk-header-cta { display: none; }
  .bk-menu-toggle { display: flex; }
  .bk-nav.is-open {
    display: block;
    position: absolute;
    top: var(--header-h); left: 0; right: 0;
    background: white;
    border-bottom: 1px solid var(--border);
    padding: 20px 24px 24px;
    box-shadow: var(--shadow-lg);
  }
  .bk-nav.is-open .bk-nav-list {
    flex-direction: column;
    gap: 16px;
    align-items: stretch;
  }
  .bk-nav.is-open .bk-nav-cta-mobile { display: block; }
  .bk-nav.is-open .bk-nav-cta-mobile:first-of-type {
    margin-top: 8px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
  }
  .bk-nav-mobile-phone {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 14px;
    background: var(--bg-alt);
    border-radius: 8px;
    color: var(--ink) !important;
    font-weight: 700 !important;
    font-size: 15px !important;
  }
  .bk-nav-mobile-phone::before {
    content: '📞';
    font-size: 14px;
  }
  .bk-nav-mobile-phone::after { display: none !important; }
}

@media (max-width: 700px) {
  :root { --header-h: 64px; }
  .bk-logo-img { height: 36px; }
  .bk-menu-toggle { width: 38px; height: 38px; }
}

/* ================== Hero ================== */
.bk-hero {
  position: relative;
  background: var(--bg-darker);
  color: white;
  overflow: hidden;
  padding: 120px 0 100px;
  isolation: isolate;
}
.bk-hero-video {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: -2;
  opacity: .35;
  filter: grayscale(.3) contrast(1.05);
}
.bk-hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(12,15,18,.7) 0%, rgba(12,15,18,.85) 70%, rgba(12,15,18,1) 100%),
    radial-gradient(ellipse at 30% 30%, rgba(0,180,197,.18) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 70%, rgba(0,180,197,.12) 0%, transparent 60%);
}
.bk-hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 1024px) { .bk-hero-grid { grid-template-columns: 1fr; gap: 48px; } }
.bk-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px;
  background: rgba(0, 180, 197, 0.12);
  border: 1px solid rgba(0, 180, 197, 0.4);
  border-radius: 100px;
  color: var(--accent-2);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.bk-hero-eyebrow-dot {
  width: 6px; height: 6px;
  background: var(--accent-2);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-2);
  animation: bkPulse 2s ease-in-out infinite;
}
@keyframes bkPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .55; }
}
.bk-hero-title {
  font-size: clamp(40px, 6vw, 80px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  font-weight: 900;
  color: white;
  margin-bottom: 24px;
}
.bk-hero-title .bk-accent {
  color: var(--accent-2);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 4px;
  text-underline-offset: 8px;
}
.bk-hero-sub {
  font-size: 18px;
  line-height: 1.6;
  color: rgba(255, 255, 255, .8);
  max-width: 580px;
  margin-bottom: 32px;
}
.bk-hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.bk-hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, .12);
}
@media (max-width: 700px) { .bk-hero-stats { grid-template-columns: 1fr 1fr; } }
.bk-hero-stat-num {
  font-size: 32px;
  font-weight: 900;
  color: var(--accent-2);
  line-height: 1;
  letter-spacing: -0.02em;
}
.bk-hero-stat-label {
  font-size: 12px;
  color: rgba(255, 255, 255, .55);
  margin-top: 6px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.bk-hero-card {
  background: rgba(255, 255, 255, .04);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  overflow: hidden;
}
.bk-hero-card-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-2);
  margin-bottom: 16px;
}
.bk-hero-card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.bk-hero-card-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: rgba(255, 255, 255, .9);
  line-height: 1.5;
}
.bk-hero-card-list svg {
  flex-shrink: 0;
  color: var(--accent-2);
  margin-top: 4px;
}

/* ================== Trust Bar ================== */
.bk-trust {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 28px 0;
}
.bk-trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
@media (max-width: 700px) { .bk-trust-grid { grid-template-columns: 1fr 1fr; gap: 24px; } }
.bk-trust-item {
  display: flex;
  align-items: center;
  gap: 14px;
}
.bk-trust-item-icon {
  width: 44px; height: 44px;
  background: var(--accent-bg);
  color: var(--accent);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.bk-trust-item strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
}
.bk-trust-item span {
  font-size: 12px;
  color: var(--ink-muted);
  line-height: 1.4;
}

/* ================== Vorher/Nachher Slider ================== */
.bk-compare {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  border-radius: var(--radius-lg);
  user-select: none;
  cursor: ew-resize;
  background: #0c0f12;
  box-shadow: var(--shadow-xl);
}
.bk-compare-img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}
.bk-compare-after {
  clip-path: polygon(var(--bk-pos, 50%) 0, 100% 0, 100% 100%, var(--bk-pos, 50%) 100%);
}
.bk-compare-handle {
  position: absolute;
  top: 0; bottom: 0;
  left: var(--bk-pos, 50%);
  width: 4px;
  background: white;
  transform: translateX(-50%);
  pointer-events: none;
  box-shadow: 0 0 0 1px rgba(0,0,0,.2), 0 0 20px rgba(0,0,0,.4);
}
.bk-compare-handle::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 56px; height: 56px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 4px 16px rgba(0,0,0,.25);
}
.bk-compare-handle::after {
  content: '⇆';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 22px;
  font-weight: 800;
  color: var(--ink);
  z-index: 2;
}
.bk-compare-label {
  position: absolute;
  top: 18px;
  padding: 6px 14px;
  background: rgba(0,0,0,.65);
  backdrop-filter: blur(8px);
  border-radius: 100px;
  color: white;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.bk-compare-label-left { left: 18px; }
.bk-compare-label-right { right: 18px; background: rgba(0, 180, 197, .85); }

/* ================== Service Cards ================== */
.bk-services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 40px;
}
@media (max-width: 1024px) { .bk-services-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px)  { .bk-services-grid { grid-template-columns: 1fr; } }
.bk-service {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all .25s;
  position: relative;
  overflow: hidden;
}
.bk-service:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}
.bk-service-icon {
  width: 52px; height: 52px;
  background: var(--accent-bg);
  color: var(--accent);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.bk-service-title {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.bk-service-desc {
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-soft);
}
.bk-service-link {
  margin-top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
}
.bk-service-link:hover { color: var(--accent-dark); }

/* ================== Industries ================== */
.bk-industries-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 900px) { .bk-industries-grid { grid-template-columns: 1fr; } }
.bk-industry {
  position: relative;
  background: var(--bg-dark);
  color: white;
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  overflow: hidden;
  isolation: isolate;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.bk-industry-img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: .35;
  z-index: -1;
  transition: transform .6s, opacity .3s;
}
.bk-industry:hover .bk-industry-img { transform: scale(1.06); opacity: .5; }
.bk-industry::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(0deg, rgba(12,15,18,.95) 0%, rgba(12,15,18,.4) 60%, transparent 100%);
  z-index: -1;
}
.bk-industry-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0, 180, 197, .25);
  color: var(--accent-2);
  border-radius: 100px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  width: fit-content;
  margin-bottom: 12px;
}
.bk-industry-title {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}
.bk-industry-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, .75);
  line-height: 1.5;
  margin-bottom: 16px;
}
.bk-industry-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-2);
  width: fit-content;
}

/* ================== Leistungen Quick-Nav (Wrap-Grid statt Scroll) ================== */
.bk-leistung-nav-wrap {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.bk-leistung-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
@media (max-width: 900px) { .bk-leistung-nav { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .bk-leistung-nav { grid-template-columns: 1fr; } }
.bk-leistung-nav a {
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  text-align: center;
  transition: all .2s;
}
.bk-leistung-nav a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  transform: translateY(-1px);
}

.bk-leistung-thumbs {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
  margin: 0 0 64px;
  padding: 0 0 32px;
  border-bottom: 1px solid var(--border);
}
.bk-leistung-thumb {
  position: relative;
  display: block;
  aspect-ratio: 4/3;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--bg-alt);
  border: 0;
  padding: 0;
  cursor: pointer;
  transition: transform .25s, box-shadow .25s;
}
.bk-leistung-thumb:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.bk-leistung-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .35s;
}
.bk-leistung-thumb:hover img { transform: scale(1.05); }
.bk-leistung-thumb-cap {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 8px 10px;
  background: linear-gradient(to top, rgba(15,23,32,.85), transparent);
  color: white;
  font-size: 11px;
  font-weight: 600;
  line-height: 1.3;
  opacity: 0;
  transition: opacity .25s;
}
.bk-leistung-thumb:hover .bk-leistung-thumb-cap { opacity: 1; }

/* ================== Detail-Page Service Sections ================== */
.bk-service-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}
.bk-service-block:last-child { border-bottom: 0; }
.bk-service-block.is-flipped > :first-child { order: 2; }
@media (max-width: 900px) {
  .bk-service-block { grid-template-columns: 1fr; gap: 32px; padding: 56px 0; }
  .bk-service-block.is-flipped > :first-child { order: 0; }
}
.bk-service-block-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--bg-alt);
  box-shadow: var(--shadow-md);
}
.bk-service-block-img img,
.bk-service-block-img video {
  width: 100%; height: 100%;
  object-fit: cover;
}
.bk-service-block h3 {
  font-size: clamp(26px, 2.5vw, 34px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 12px 0 16px;
}
.bk-service-block p { color: var(--ink-soft); line-height: 1.7; margin-bottom: 16px; }
.bk-service-block ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 16px 0 24px;
}
.bk-service-block ul li {
  position: relative;
  padding-left: 28px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
}
.bk-service-block ul li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 9px;
  width: 14px; height: 8px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}
.bk-service-block ul li strong { font-weight: 700; }
.bk-service-block-benefit {
  margin-top: 12px;
  margin-bottom: 24px;
  padding: 14px 18px;
  background: var(--accent-bg);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  font-size: 14px;
  color: var(--ink);
  line-height: 1.55;
}
.bk-service-block-benefit strong { color: var(--accent-dark); }
.bk-service-block-benefit + .bk-btn { margin-top: 4px; }

/* ================== About / Team ================== */
.bk-team-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 40px;
}
@media (max-width: 700px) { .bk-team-grid { grid-template-columns: 1fr; } }
.bk-team {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .25s, box-shadow .25s;
}
.bk-team:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.bk-team-photo {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--bg-alt);
}
.bk-team-photo img { width: 100%; height: 100%; object-fit: cover; }
.bk-team-info { padding: 24px 28px 28px; }
.bk-team-name { font-size: 22px; font-weight: 800; letter-spacing: -0.01em; margin-bottom: 4px; }
.bk-team-role { font-size: 14px; color: var(--accent-dark); font-weight: 600; margin-bottom: 8px; }
.bk-team-spec { font-size: 13px; color: var(--ink-muted); }

/* ================== CTA Strip ================== */
.bk-cta {
  background: var(--bg-dark);
  color: white;
  padding: 72px 0;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.bk-cta::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0,180,197,.18) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(0,180,197,.10) 0%, transparent 50%);
  z-index: -1;
}
.bk-cta-grid {
  display: grid;
  grid-template-columns: 1.4fr auto;
  gap: 40px;
  align-items: center;
}
@media (max-width: 800px) { .bk-cta-grid { grid-template-columns: 1fr; } }
.bk-cta-headline {
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: white;
}
.bk-cta-sub { font-size: 16px; color: rgba(255, 255, 255, .75); line-height: 1.6; max-width: 560px; }
.bk-cta-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
@media (max-width: 800px) { .bk-cta-actions { flex-direction: row; flex-wrap: wrap; } }

/* ================== Forms ================== */
.bk-form { display: flex; flex-direction: column; gap: 18px; }
.bk-form-row { display: flex; flex-direction: column; gap: 6px; }
.bk-form-row label { font-size: 13px; font-weight: 600; color: var(--ink); }
.bk-form input[type="text"],
.bk-form input[type="email"],
.bk-form input[type="tel"],
.bk-form select,
.bk-form textarea {
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--ink);
  outline: 0;
  transition: border-color .2s, box-shadow .2s;
  font-weight: 500;
}
.bk-form input:focus, .bk-form select:focus, .bk-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow-soft);
}
.bk-form textarea { min-height: 120px; resize: vertical; line-height: 1.5; }
.bk-form select {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1l5 5 5-5' stroke='%2364748b' stroke-width='2' stroke-linecap='round' fill='none'/></svg>");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}
.bk-form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 600px) { .bk-form-grid-2 { grid-template-columns: 1fr; } }
.bk-form-honeypot { position: absolute !important; left: -9999px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }
.bk-form-consent {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 12px;
  color: var(--ink-muted);
  line-height: 1.5;
  cursor: pointer;
}
.bk-form-consent input { margin-top: 2px; width: 16px; height: 16px; accent-color: var(--accent); flex-shrink: 0; }
.bk-form-consent a { color: var(--accent); text-decoration: underline; }
.bk-form-status { font-size: 14px; line-height: 1.5; }
.bk-form-status.success { padding: 14px 16px; background: rgba(31, 159, 102, .1); border: 1px solid rgba(31, 159, 102, .3); border-radius: 8px; color: var(--success); font-weight: 600; }
.bk-form-status.error { padding: 14px 16px; background: #fef2f2; border: 1px solid #fecaca; border-radius: 8px; color: var(--danger); font-weight: 500; }

/* ================== Contact Cards ================== */
.bk-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 56px;
}
@media (max-width: 900px) { .bk-contact-grid { grid-template-columns: 1fr; gap: 36px; } }
.bk-contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.bk-contact-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color .2s;
}
.bk-contact-card:hover { border-color: var(--accent); }
.bk-contact-card-icon {
  width: 40px; height: 40px;
  background: var(--accent-bg);
  color: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.bk-contact-card-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  margin-bottom: 4px;
}
.bk-contact-card-value {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.3;
}
.bk-contact-card-value a { color: var(--ink); text-decoration: none; }
.bk-contact-card-value a:hover { color: var(--accent); }
.bk-contact-form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
}

/* ================== Map ================== */
.bk-map {
  width: 100%;
  aspect-ratio: 16/7;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 40px;
}
.bk-map iframe { width: 100%; height: 100%; border: 0; filter: grayscale(.2) contrast(1.05); }

/* ================== Gallery ================== */
.bk-gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 40px;
}
@media (max-width: 900px) { .bk-gallery { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 600px) { .bk-gallery { grid-template-columns: 1fr 1fr; } }
.bk-gallery img {
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--bg-alt);
  cursor: pointer;
  transition: transform .25s, box-shadow .25s;
}
.bk-gallery img:hover { transform: scale(1.02); box-shadow: var(--shadow-md); }

/* ================== Footer ================== */
.bk-footer {
  background: var(--bg-darker);
  color: rgba(255, 255, 255, .8);
  padding: 80px 0 32px;
  margin-top: 0;
}
.bk-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
@media (max-width: 900px) { .bk-footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 500px) { .bk-footer-grid { grid-template-columns: 1fr; } }
.bk-footer-logo {
  font-size: 22px;
  font-weight: 900;
  color: white;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}
.bk-footer-logo .bk-logo-mark { width: 42px; height: 42px; background: var(--accent); color: white; }
.bk-footer-tagline {
  font-size: 14px;
  color: rgba(255, 255, 255, .6);
  line-height: 1.6;
  max-width: 320px;
  margin-bottom: 14px;
}
.bk-footer-col h4 {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  margin-bottom: 16px;
}
.bk-footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.bk-footer-col a { font-size: 14px; color: rgba(255, 255, 255, .65); font-weight: 500; }
.bk-footer-col a:hover { color: white; }
.bk-footer-contact-row { display: flex; gap: 8px; align-items: flex-start; font-size: 14px; color: rgba(255, 255, 255, .65); line-height: 1.5; }
.bk-footer-contact-row svg { flex-shrink: 0; margin-top: 3px; color: var(--accent-2); }
.bk-footer-contact-row a { color: rgba(255, 255, 255, .65); }
.bk-footer-contact-row a:hover { color: white; }
.bk-footer-bar {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: rgba(255, 255, 255, .45);
}
.bk-footer-bar a { color: rgba(255, 255, 255, .55); }
.bk-footer-bar a:hover { color: white; }

/* ================== Custom Cursor: Schraubenschlüssel (cursor-orientiert) ================== */
@media (pointer: fine) {
  body, a, button, input, textarea, select, label, summary, [role="button"] {
    cursor: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='32' height='32' viewBox='0 0 24 24' fill='%2300B4C5' stroke='%23004A55' stroke-width='1.2' stroke-linejoin='round' stroke-linecap='round'><g transform='rotate(-90 12 12)'><path d='M14.7 6.3a1 1 0 0 0 0 1.4l1.6 1.6a1 1 0 0 0 1.4 0l3.77-3.77a6 6 0 0 1-7.94 7.94l-6.91 6.91a2.12 2.12 0 0 1-3-3l6.91-6.91a6 6 0 0 1 7.94-7.94l-3.76 3.76z'/></g></svg>") 6 6, auto;
  }
  /* Beim Hover über klickbare Elemente: Schraubenschlüssel mit Cyan-Rahmen */
  a, button, [role="button"], summary, label[for], input[type="submit"], input[type="button"] {
    cursor: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='34' height='34' viewBox='0 0 34 34'><circle cx='17' cy='17' r='15' fill='%2300B4C5' fill-opacity='0.18' stroke='%2300B4C5' stroke-width='1.2'/><g transform='translate(5 5)' fill='%2300B4C5' stroke='%23004A55' stroke-width='1.2' stroke-linejoin='round' stroke-linecap='round'><g transform='rotate(-90 12 12)'><path d='M14.7 6.3a1 1 0 0 0 0 1.4l1.6 1.6a1 1 0 0 0 1.4 0l3.77-3.77a6 6 0 0 1-7.94 7.94l-6.91 6.91a2.12 2.12 0 0 1-3-3l6.91-6.91a6 6 0 0 1 7.94-7.94l-3.76 3.76z'/></g></g></svg>") 11 11, pointer;
  }
}

/* ================== Animations on scroll (only after JS ready) ================== */
.bk-js-ready .bk-fade {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .6s ease, transform .6s ease;
}
.bk-js-ready .bk-fade.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}

/* =============================================================
   GAMIFICATION FEATURES
   ============================================================= */

/* #1 Diagnose-Tool */
.bk-diagnose {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}
.bk-diagnose::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--accent-glow-soft) 0%, transparent 60%);
  pointer-events: none;
}
.bk-diagnose-stepper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 28px;
  position: relative;
}
.bk-diagnose-step {
  display: flex;
  align-items: center;
  gap: 10px;
}
.bk-diagnose-step-num {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--bg-alt);
  color: var(--ink-muted);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px;
  font-family: var(--mono);
  transition: all .25s;
}
.bk-diagnose-step.is-active .bk-diagnose-step-num,
.bk-diagnose-step.is-done .bk-diagnose-step-num {
  background: var(--accent);
  color: white;
  box-shadow: 0 0 0 4px var(--accent-glow-soft);
}
.bk-diagnose-step-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-muted);
}
.bk-diagnose-step.is-active .bk-diagnose-step-label { color: var(--ink); }
.bk-diagnose-step-arrow {
  width: 16px;
  height: 1px;
  background: var(--border-strong);
}
.bk-diagnose-panel { position: relative; min-height: 240px; }
.bk-diagnose-pane { display: none; }
.bk-diagnose-pane.is-active { display: block; }
.bk-diagnose-question {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
  text-align: center;
  margin-bottom: 24px;
}
.bk-diagnose-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 640px;
  margin: 0 auto;
}
@media (max-width: 600px) { .bk-diagnose-options { grid-template-columns: 1fr; } }
.bk-diagnose-option {
  padding: 18px 22px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: left;
  cursor: pointer;
  transition: all .2s;
  font-family: inherit;
  font-size: 14px;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 14px;
}
.bk-diagnose-option:hover, .bk-diagnose-option.is-selected {
  background: var(--accent-bg);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.bk-diagnose-option-icon {
  font-size: 24px;
  flex-shrink: 0;
}
.bk-diagnose-option-text strong { display: block; font-weight: 700; margin-bottom: 2px; }
.bk-diagnose-option-text small { color: var(--ink-muted); font-size: 12px; }
.bk-diagnose-result {
  padding: 28px;
  background: linear-gradient(135deg, var(--bg-dark) 0%, #1f2530 100%);
  color: white;
  border-radius: var(--radius-lg);
  text-align: center;
}
.bk-diagnose-result-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0, 180, 197, .25);
  color: var(--accent-2);
  border-radius: 100px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}
.bk-diagnose-result-title { font-size: 24px; font-weight: 800; margin-bottom: 8px; color: white; }
.bk-diagnose-result-text { color: rgba(255,255,255,.78); margin-bottom: 20px; font-size: 14px; line-height: 1.6; }
.bk-diagnose-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
  gap: 8px;
}
.bk-diagnose-nav .bk-btn:disabled { opacity: .4; pointer-events: none; }

/* #2 Vorher/Nachher Karussell — opacity-stack (robust gegenüber Transform-Issues) */
.bk-compares {
  position: relative;
}
.bk-compares-track {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #0c0f12;
}
.bk-compares-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity .4s ease;
}
.bk-compares-slide.is-active {
  opacity: 1;
  pointer-events: auto;
}
.bk-compares-slide .bk-compare {
  position: absolute;
  inset: 0;
  border-radius: 0;
  aspect-ratio: auto;
  height: 100%;
}
.bk-compares-caption {
  text-align: center;
  margin-top: 18px;
  font-size: 14px;
  color: var(--ink-soft);
  font-weight: 500;
}
.bk-compares-caption strong { color: var(--ink); font-weight: 700; }
.bk-compares-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}
.bk-compares-arrow {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  transition: all .2s;
}
.bk-compares-arrow:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  box-shadow: 0 4px 12px var(--accent-glow);
}
.bk-compares-arrow:disabled { opacity: .35; pointer-events: none; }
.bk-compares-dots {
  display: flex;
  gap: 6px;
}
.bk-compares-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--border-strong);
  border: 0;
  transition: all .2s;
}
.bk-compares-dot.is-active {
  background: var(--accent);
  width: 24px;
  border-radius: 4px;
}

/* #3 Hover-Röntgenblick auf Service-Cards */
.bk-service .bk-service-icon { transition: all .35s; }
.bk-service .bk-service-icon-xray {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(.6) rotate(-15deg);
  transition: all .35s cubic-bezier(.22,1.36,.39,1);
  color: var(--accent-dark);
}
.bk-service .bk-service-icon { position: relative; }
.bk-service:hover .bk-service-icon > svg:first-child { opacity: 0; transform: scale(1.4) rotate(20deg); }
.bk-service:hover .bk-service-icon-xray { opacity: 1; transform: scale(1) rotate(0deg); }

/* #4 Conveyor Animation */
.bk-conveyor {
  height: 56px;
  background: linear-gradient(180deg, transparent 0%, rgba(20, 24, 29, .04) 100%);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.bk-conveyor::before {
  content: '';
  position: absolute;
  bottom: 12px;
  left: 0; right: 0;
  height: 4px;
  background: repeating-linear-gradient(90deg, #2a3038 0 8px, #1a1f25 8px 16px);
  border-radius: 2px;
}
.bk-conveyor-track {
  position: absolute;
  bottom: 16px;
  left: -200px;
  display: flex;
  gap: 80px;
  animation: bkConveyor 28s linear infinite;
}
@media (prefers-reduced-motion: reduce) {
  .bk-conveyor-track { animation: none; }
}
@keyframes bkConveyor {
  to { transform: translateX(calc(100vw + 400px)); }
}
.bk-conveyor-bottle {
  width: 18px; height: 32px;
  background: linear-gradient(180deg, var(--accent-2) 0%, var(--accent) 70%, var(--accent-dark) 100%);
  border-radius: 3px 3px 6px 6px;
  position: relative;
  box-shadow: 0 2px 4px rgba(0,0,0,.18);
}
.bk-conveyor-bottle::before {
  content: '';
  position: absolute;
  top: -6px; left: 50%;
  transform: translateX(-50%);
  width: 6px; height: 6px;
  background: var(--bg-dark);
  border-radius: 1px 1px 0 0;
}
.bk-conveyor-bottle::after {
  content: '';
  position: absolute;
  top: 12px; left: 4px;
  width: 10px; height: 6px;
  background: white;
  opacity: .8;
  border-radius: 1px;
}

/* #5 Quick-Quote-Generator */
.bk-quote {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px;
  box-shadow: var(--shadow-md);
}
.bk-quote-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 36px;
  align-items: stretch;
}
@media (max-width: 800px) {
  .bk-quote-grid { grid-template-columns: 1fr; gap: 24px; }
  .bk-quote { padding: 24px; }
}
.bk-quote-controls { display: flex; flex-direction: column; gap: 22px; }
.bk-quote-row { display: block; }
.bk-quote-row-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}
.bk-quote-label { font-size: 14px; font-weight: 600; color: var(--ink); }
.bk-quote-value {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-bg);
  padding: 3px 10px;
  border-radius: 6px;
}
.bk-range {
  -webkit-appearance: none; appearance: none;
  width: 100%;
  height: 6px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 100px;
  outline: 0;
}
.bk-range::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--accent);
  border: 0;
  box-shadow: 0 0 0 4px white, 0 4px 12px var(--accent-glow);
  transition: transform .15s;
}
.bk-range::-webkit-slider-thumb:hover { transform: scale(1.15); }
.bk-range::-moz-range-thumb {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--accent); border: 0;
  box-shadow: 0 0 0 4px white, 0 4px 12px rgba(0,180,197,.4);
}
.bk-quote-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.bk-quote-pills label { cursor: pointer; }
.bk-quote-pills input { position: absolute; opacity: 0; pointer-events: none; }
.bk-quote-pills span {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  background: var(--surface);
  transition: all .2s;
}
.bk-quote-pills input:checked + span {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  box-shadow: 0 4px 10px var(--accent-glow-soft);
}
.bk-quote-output {
  background: linear-gradient(135deg, var(--bg-dark) 0%, #1f2530 100%);
  color: white;
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.bk-quote-output-tag {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-2);
  margin-bottom: 8px;
}
.bk-quote-output-num {
  font-size: 36px;
  font-weight: 900;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--accent-2) 0%, white 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}
.bk-quote-output-note {
  font-size: 12px;
  color: rgba(255,255,255,.55);
  margin-top: 8px;
  line-height: 1.5;
}
.bk-quote-output-cta { margin-top: 18px; }

/* #6 Live-Counter */
.bk-livestrip {
  background: var(--bg-dark);
  color: white;
  padding: 18px 0;
  border-top: 1px solid rgba(255,255,255,.06);
}
.bk-livestrip-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.bk-livestrip-pulse {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(31, 159, 102, .15);
  border: 1px solid rgba(31, 159, 102, .35);
  border-radius: 100px;
  font-size: 11px;
  font-weight: 700;
  color: #34d399;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.bk-livestrip-pulse-dot {
  width: 6px; height: 6px;
  background: #10b981;
  border-radius: 50%;
  animation: bkPulse 1.5s ease-in-out infinite;
}
.bk-livestrip-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  flex: 1;
  min-width: 0;
}
.bk-livestrip-stat { display: flex; flex-direction: column; gap: 2px; }
.bk-livestrip-num {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-2);
  letter-spacing: -0.02em;
}
.bk-livestrip-label {
  font-size: 11px;
  color: rgba(255,255,255,.55);
  font-weight: 500;
}
@media (max-width: 700px) { .bk-livestrip-stats { grid-template-columns: 1fr; gap: 12px; } }

/* #7 Timeline */
.bk-timeline {
  position: relative;
  margin-top: 40px;
  padding-left: 36px;
}
.bk-timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 12px; bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-glow-soft) 100%);
}
.bk-timeline-item {
  position: relative;
  padding-bottom: 32px;
}
.bk-timeline-item::before {
  content: '';
  position: absolute;
  left: -30px;
  top: 8px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--surface);
  box-shadow: 0 0 0 1px var(--accent), 0 0 12px var(--accent-glow-soft);
}
.bk-timeline-year {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-dark);
  margin-bottom: 4px;
}
.bk-timeline-title {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}
.bk-timeline-text {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* #8 Werkzeug-Wand Pattern */
.bk-toolwall {
  position: relative;
}
.bk-toolwall::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200' viewBox='0 0 200 200' fill='none' stroke='%23818992' stroke-width='1' stroke-linecap='round' stroke-linejoin='round'><g opacity='0.10'><path d='M30 40 l20 -20 m-10 -10 l30 30' /><circle cx='160' cy='30' r='8' /><path d='M160 38 v18 m-6 -2 h12' /><path d='M50 130 c-6 0 -10 4 -10 10 c0 6 4 10 10 10 h30 c6 0 10 -4 10 -10 c0 -6 -4 -10 -10 -10 z' /><path d='M150 100 l25 25 m-30 -20 l30 -30' /><circle cx='100' cy='100' r='12' /><circle cx='100' cy='100' r='6' /><path d='M100 88 v-8 m0 32 v8 m12 -12 h8 m-32 0 h-8' /></g></svg>");
  background-repeat: repeat;
  background-size: 240px 240px;
  pointer-events: none;
  opacity: 1;
  z-index: 0;
}
.bk-toolwall > * { position: relative; z-index: 1; }

/* #9 Sound-Easter-Egg has no CSS */

/* #10 Bauteil-Bibliothek Modal */
.bk-modal {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(15, 18, 22, .55);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
}
.bk-modal.is-open { opacity: 1; pointer-events: auto; }
.bk-modal-window {
  background: var(--surface);
  border-radius: var(--radius-xl);
  max-width: 920px;
  width: 100%;
  max-height: 86vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xl);
  transform: translateY(20px) scale(.96);
  transition: transform .35s cubic-bezier(.22,1.36,.39,1);
}
.bk-modal.is-open .bk-modal-window { transform: translateY(0) scale(1); }
.bk-modal-head {
  padding: 24px 28px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.bk-modal-head h3 { font-size: 22px; font-weight: 800; letter-spacing: -0.01em; }
.bk-modal-head p { font-size: 13px; color: var(--ink-muted); margin-top: 2px; }
.bk-modal-close {
  background: var(--bg-alt);
  border: 0;
  width: 36px; height: 36px;
  border-radius: 8px;
  font-size: 22px;
  color: var(--ink);
  line-height: 1;
}
.bk-modal-body {
  padding: 24px 28px;
  overflow-y: auto;
}
.bk-parts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
@media (max-width: 700px) { .bk-parts-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .bk-parts-grid { grid-template-columns: 1fr; } }
.bk-part {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  background: var(--bg-alt);
  border-radius: var(--radius);
  transition: all .2s;
}
.bk-part:hover {
  background: var(--accent-bg);
  transform: translateY(-2px);
}
.bk-part-icon {
  width: 48px; height: 48px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}
.bk-part-text strong { display: block; font-size: 14px; font-weight: 700; margin-bottom: 2px; }
.bk-part-text small { font-size: 12px; color: var(--ink-muted); line-height: 1.4; }

/* ================== Lightbox ================== */
.bk-lightbox {
  position: fixed;
  inset: 0;
  z-index: 600;
  background: rgba(0, 0, 0, .94);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
}
.bk-lightbox.is-open { opacity: 1; pointer-events: auto; }
.bk-lightbox-img {
  max-width: min(96vw, 1400px);
  max-height: 86vh;
  border-radius: 8px;
  box-shadow: 0 24px 64px rgba(0,0,0,.5);
  object-fit: contain;
}
.bk-lightbox-cap {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 16px;
  background: rgba(0,0,0,.5);
  backdrop-filter: blur(6px);
  border-radius: 100px;
  color: white;
  font-size: 13px;
  font-weight: 600;
  max-width: 90vw;
  text-align: center;
}
.bk-lightbox-close {
  position: absolute;
  top: 18px; right: 18px;
  width: 44px; height: 44px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, .12);
  color: white;
  font-size: 24px;
  line-height: 1;
  backdrop-filter: blur(6px);
  cursor: pointer;
  transition: background .2s;
}
.bk-lightbox-close:hover { background: rgba(255, 255, 255, .22); }

/* ================== Page Header (sub-pages) ================== */
.bk-pagehead {
  background: var(--bg-dark);
  color: white;
  padding: 96px 0 64px;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.bk-pagehead::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 30% 40%, rgba(0,180,197,.15) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 60%, rgba(0,180,197,.10) 0%, transparent 60%);
  z-index: -1;
}
.bk-pagehead h1 {
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-bottom: 16px;
}
.bk-pagehead p {
  font-size: 18px;
  color: rgba(255, 255, 255, .75);
  line-height: 1.6;
  max-width: 720px;
}
.bk-pagehead-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: rgba(255, 255, 255, .55);
  margin-bottom: 18px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.bk-pagehead-breadcrumb a { color: rgba(255, 255, 255, .65); }
.bk-pagehead-breadcrumb a:hover { color: white; }