/* BK Digital Marketing — Design-System aus der Corporate Design Guideline (Figma) */

:root {
  --bg-base: #000000;
  --surface-card: rgba(255, 255, 255, 0.06);
  --accent: #644CBA;
  --accent-glow: rgba(99, 76, 185, 0.4);
  --text-primary: #FFFFFF;
  --text-hero: #FEFBFF;
  --text-secondary: #F1F1F1;
  --border-hairline: rgba(255, 255, 255, 0.1);
  --overlay-scrim: rgba(0, 0, 0, 0.52);

  --radius-sm: 14px;
  --radius-lg: 20px;

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --shell-max: 1180px;
  --shell-gutter: 24px;
  --section-space: clamp(56px, 8vw, 100px);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

h1, h2, h3, p, blockquote, figure { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--text-primary); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

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

.skip-link {
  position: absolute;
  left: 16px;
  top: -64px;
  z-index: 100;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--text-primary);
  font-weight: 600;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 16px; color: var(--text-primary); }

.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--shell-gutter);
}

.section { padding-block: var(--section-space); }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  border: 0;
  font-family: inherit;
  font-size: 16px;
  line-height: 24px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.btn-primary {
  background: var(--accent);
  color: var(--text-primary);
  box-shadow: 0 4px 36px var(--accent-glow);
}
.btn-primary:hover,
.btn-primary:focus-visible {
  color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 44px var(--accent-glow);
}

.btn-lg {
  font-size: 18px;
  line-height: 27px;
  padding: 16px 32px;
}

.text-cta {
  display: block;
  margin-top: auto;
  padding-top: 18px;
  font-size: 18px;
  line-height: 24px;
  font-weight: 800;
  color: var(--accent);
}
.text-cta span {
  display: inline-block;
  margin-left: 8px;
  transition: transform 0.2s ease;
}
.text-cta:hover span,
.text-cta:focus-visible span { transform: translateX(4px); }

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding-block: 18px;
  padding-top: calc(18px + env(safe-area-inset-top, 0px));
  background: transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease, padding 0.3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-stuck {
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border-hairline);
  padding-block: 12px;
  padding-top: calc(12px + env(safe-area-inset-top, 0px));
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo img { width: 190px; height: auto; }

.primary-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-list a {
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 600;
  position: relative;
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.25s ease;
}
.nav-list a:hover::after,
.nav-list a:focus-visible::after { width: 100%; }

.nav-toggle {
  display: none;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav-toggle-box {
  display: grid;
  gap: 5px;
  width: 22px;
}
.nav-toggle-bar {
  display: block;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */

.hero-section { padding-block: clamp(24px, 4vw, 40px) var(--section-space); }

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-hairline);
  padding: 30px;
  min-height: clamp(460px, 72vh, 760px);
  display: grid;
  place-items: center;
  text-align: center;
}

.hero-photo {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--overlay-scrim);
}

.hero-content {
  max-width: 900px;
  display: grid;
  justify-items: center;
  gap: 24px;
  padding-block: clamp(32px, 6vw, 72px);
}

.hero-eyebrow {
  font-size: 14px;
  line-height: 17px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
}

.hero-title {
  margin: 0;
  font-size: clamp(32px, 8.2vw, 100px);
  line-height: 1;
  font-weight: 800;
  letter-spacing: clamp(2px, 0.6vw, 7px);
  text-transform: uppercase;
  color: var(--text-hero);
}

.hero-subline {
  max-width: 720px;
  font-size: clamp(17px, 2.2vw, 30px);
  line-height: 1.4;
  font-weight: 400;
  letter-spacing: 1px;
  color: var(--text-secondary);
}

/* ---------- Karten ---------- */

.card {
  background: var(--surface-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  transition: transform 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(100, 76, 186, 0.5);
  background: rgba(255, 255, 255, 0.09);
}

.trust-grid,
.services-grid,
.testimonial-grid {
  display: grid;
  gap: 24px;
}

.trust-grid { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.trust-card {
  padding: 20px;
  display: grid;
  gap: 12px;
  align-content: start;
}
.trust-card h3 {
  font-size: 14px;
  line-height: 17px;
  font-weight: 700;
  color: var(--accent);
}
.trust-card p {
  font-size: 14px;
  line-height: 20px;
  color: var(--text-primary);
}

.icon-badge {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(100, 76, 186, 0.32) 0%, var(--accent) 100%);
  color: var(--text-primary);
}
.icon-badge svg { width: 20px; height: 20px; }

/* ---------- Section-Köpfe ---------- */

.section-head {
  display: grid;
  gap: 12px;
  margin-bottom: 40px;
  max-width: 680px;
}
.section-head h2 {
  font-size: 25px;
  line-height: 32px;
  font-weight: 800;
  color: var(--accent);
}
.section-lead {
  font-size: 16px;
  line-height: 26px;
  color: var(--text-secondary);
}

/* ---------- Leistungen ---------- */

.services-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

.service-card {
  padding: 30px 15px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.service-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  color: var(--accent);
}
.service-icon svg { width: 100%; height: 100%; }
.service-card h3 {
  font-size: 16px;
  line-height: 26px;
  font-weight: 800;
  color: var(--text-primary);
}
.service-card p {
  font-size: 14px;
  line-height: 20px;
  color: var(--text-primary);
}

/* ---------- Über mich ---------- */

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}

.about-media {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-hairline);
  overflow: hidden;
  padding: 0;
}
.about-media img {
  width: 100%;
  aspect-ratio: 9 / 11;
  object-fit: cover;
}

.about-body { display: grid; gap: 20px; justify-items: start; }
.about-body h2 {
  font-size: 25px;
  line-height: 32px;
  font-weight: 800;
  color: var(--accent);
}
.about-lead {
  font-size: 16px;
  line-height: 26px;
  color: var(--text-secondary);
}
.about-list { display: grid; gap: 12px; }
.about-list li {
  position: relative;
  padding-left: 32px;
  font-size: 15px;
  line-height: 24px;
}
.about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 18px;
  height: 10px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}

/* ---------- Testimonials ---------- */

.testimonial-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

.testimonial-card {
  height: 100%;
  border-radius: var(--radius-lg);
  padding: 30px 30px 50px;
  display: grid;
  gap: 18px;
  align-content: start;
}
.stars {
  color: var(--accent);
  font-size: 18px;
  letter-spacing: 3px;
}
.testimonial-card blockquote p {
  font-size: 15px;
  line-height: 24px;
  color: var(--text-primary);
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}
.testimonial-author img {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border-hairline);
}
.author-name {
  font-size: 14px;
  line-height: 17px;
  font-weight: 700;
  color: var(--accent);
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border-hairline);
  padding-block: var(--section-space) 0;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 40px;
}

.footer-brand img { width: 200px; }
.footer-brand p {
  margin-top: 16px;
  font-size: 14px;
  line-height: 22px;
  color: var(--text-secondary);
}

.footer-col h3 {
  margin-bottom: 16px;
  font-size: 14px;
  line-height: 17px;
  font-weight: 700;
  color: var(--accent);
}
.footer-list { display: grid; gap: 10px; margin-bottom: 20px; }
.footer-list li,
.footer-list a {
  font-size: 14px;
  line-height: 22px;
  color: var(--text-primary);
}
.footer-list a:hover { color: var(--accent); }

.footer-bottom {
  margin-top: 56px;
  padding-block: 24px;
  border-top: 1px solid var(--border-hairline);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-secondary);
}
.footer-legal { display: flex; gap: 20px; }
.footer-legal a { color: var(--text-secondary); font-size: 13px; }
.footer-legal a:hover { color: var(--accent); }

/* ---------- Scroll-Reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-media { max-width: 420px; }
}

@media (max-width: 820px) {
  .nav-toggle { display: block; }

  .primary-nav {
    position: absolute;
    left: var(--shell-gutter);
    right: var(--shell-gutter);
    top: calc(100% + 12px);
    flex-direction: column;
    align-items: stretch;
    gap: 20px;
    padding: 24px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-hairline);
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(12px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  }
  .primary-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 18px;
  }
  .nav-list a { font-size: 16px; }
  .nav-cta { width: 100%; }

  .hero { padding: 20px; }
}

@media (max-width: 520px) {
  :root { --shell-gutter: 18px; }
  .logo img { width: 160px; }
  .hero { min-height: 420px; }
  .testimonial-card { padding: 24px 24px 36px; }
}

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