/* kernbohrungen-vastobau.de — eigenes Konzept: Bohrkern-/Ring-Motiv durchgängig
   (Kreisbohrungen sind hier wörtlich das Produkt), Produktfotos in Ring-Rahmen,
   Statistik als Messkreise. */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(38,38,38,0.08);
}
.site-header__inner { display: flex; align-items: center; justify-content: space-between; padding-block: 1rem; }
.brand { display: flex; align-items: center; text-decoration: none; }
.site-header__nav { display: flex; align-items: center; gap: 1.5rem; }
.phone-link { font-family: var(--font-mono); font-size: 0.9375rem; text-decoration: none; color: var(--text); }
@media (max-width: 640px) { .phone-link { display: none; } }

/* -- Hero mit Bohrkern-Rahmen ------------------------------------------------------ */

.hero { padding-block: var(--space-6) var(--space-5); overflow: hidden; }
.hero__grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: var(--space-5); align-items: center; }

.hero__headline { font-size: clamp(2.75rem, 6.5vw, 5rem); margin-block: 0.5rem 1.5rem; }
.hero__diameter { color: var(--marke); }
.hero__diameter small { font-size: 0.5em; font-family: var(--font-mono); text-transform: none; letter-spacing: 0; }

.hero__lead { max-width: 36ch; font-size: 1.1875rem; color: var(--text-soft); margin-bottom: var(--space-3); }
.hero__cta { display: flex; flex-wrap: wrap; gap: 1rem; }

.hero__visual { position: relative; }

.core-frame {
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  position: relative;
  animation: core-reveal 1s cubic-bezier(.16,1,.3,1) both;
}
.core-frame::after {
  content: '';
  position: absolute; inset: 0;
  border-radius: 50%;
  box-shadow: inset 0 0 0 10px var(--bg), inset 0 0 0 13px var(--marke);
}
.core-frame img { width: 100%; height: 100%; object-fit: cover; }

.core-frame__caption {
  font-family: var(--font-mono); font-size: 0.8125rem; text-align: center;
  color: var(--text-soft); margin-top: 1rem;
}

@keyframes core-reveal { from { clip-path: circle(0% at 50% 50%); } to { clip-path: circle(75% at 50% 50%); } }

@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { max-width: 20rem; margin-inline: auto; }
}

/* -- Ring-Buttons (Bohrkern-Motiv, hier durchgängig verwendet) ---------------------- */

.ring-btn--lg { padding: 1.1rem 2rem 1.1rem 0.6rem; font-size: 1rem; }

/* -- Sections ------------------------------------------------------------------------ */

.section { padding-block: var(--space-5); }
.section--dark { background: var(--anthrazit); color: var(--weiss); }
.section--dark .chalk-divider .label { color: var(--marke-hell); }
.section--dark .chalk-divider { color: #7d7f82; }
.section__title { font-size: clamp(2rem, 4.5vw, 3.25rem); margin-bottom: var(--space-3); max-width: 18ch; }
.section__intro { max-width: 62ch; font-size: 1.0625rem; color: var(--text-soft); margin-bottom: var(--space-3); }

/* -- Referenz-Layout (geteilt) --------------------------------------------------------- */

.ref-layout { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); align-items: center; }
.ref-layout--reverse { direction: rtl; }
.ref-layout--reverse > * { direction: ltr; }
.ref-layout__body { font-size: 1.0625rem; max-width: 44ch; opacity: 0.9; }
.ref-layout__body + .ref-layout__body { margin-top: 1rem; }

@media (max-width: 900px) {
  .ref-layout, .ref-layout--reverse { grid-template-columns: 1fr; direction: ltr; }
}

/* -- Ring-Galerie (Produktfotos als Bohrkern-Rahmen) ------------------------------------ */

.ring-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.ring-frame {
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  position: relative;
  border: 1.5px solid rgba(38,38,38,0.14);
}

.ring-frame img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.ring-frame:hover img { transform: scale(1.08); }

@media (max-width: 560px) {
  .ring-gallery { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
}

/* -- Statistik (Messkreise) ----------------------------------------------------------- */

.stats-section { padding-block: var(--space-5); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  text-align: center;
}

.stat__ring {
  width: 9rem; height: 9rem;
  border-radius: 50%;
  border: 2px solid var(--marke);
  display: flex; align-items: baseline; justify-content: center;
  margin-inline: auto;
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--weiss);
}

.stat__ring small { font-size: 1rem; font-family: var(--font-mono); margin-left: 0.15rem; }

.stat p {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: #b7b8ba;
}

@media (max-width: 700px) {
  .stats-grid { grid-template-columns: 1fr; gap: 2rem; }
}

/* -- Erklär-Sektion (Vollbild) ----------------------------------------------------------- */

.explainer { position: relative; min-height: 62vh; display: flex; align-items: center; overflow: hidden; }
.explainer__bg { position: absolute; inset: 0; }
.explainer__bg img { width: 100%; height: 100%; object-fit: cover; }
.explainer__overlay { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(0,0,0,.78) 0%, rgba(0,0,0,.45) 100%); }
.explainer__inner { position: relative; color: var(--weiss); max-width: 720px; }
.chalk-divider--onlight { color: rgba(255,255,255,0.5); }
.chalk-divider--onlight .label { color: var(--marke-hell); }
.explainer__text { font-size: 1.1875rem; color: rgba(255,255,255,0.92); }
.explainer__text strong { color: var(--marke-hell); }

/* -- Einsatzgebiet (Area-Tags) -------------------------------------------------------------- */

.area-tags { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.area-tags span {
  border: 1px solid rgba(38,38,38,0.18);
  border-radius: 999px;
  padding: 0.5rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-soft);
}
.area-tags span:first-child { border-color: var(--marke); color: var(--marke); font-weight: 500; }

/* -- Markenfamilie (geteilt) ----------------------------------------------------------------- */

.brand-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; margin-top: var(--space-3); }
.brand-card {
  border: 1.5px solid rgba(255,255,255,0.16);
  border-top: 3px solid var(--marke-hell);
  border-radius: var(--radius);
  padding: var(--space-3);
  text-decoration: none;
  color: var(--weiss);
  display: flex; flex-direction: column; gap: 0.6rem;
  transition: transform 0.2s ease, border-color 0.25s ease;
}
.brand-card:hover { transform: translateY(-4px); border-color: var(--marke-hell); }
.brand-card h3 { font-family: var(--font-display); text-transform: uppercase; font-size: 1.4rem; }
.brand-card p { margin: 0; font-size: 0.9375rem; color: #b7b8ba; }
@media (max-width: 720px) { .brand-grid { grid-template-columns: 1fr; } }

/* -- FAQ (geteilt) ------------------------------------------------------------------------------ */

.faq-list { display: flex; flex-direction: column; gap: 0.75rem; max-width: 72ch; }
.faq-item { border: 1px solid rgba(38,38,38,0.12); border-radius: var(--radius); padding: 1.1rem 1.4rem; }
.faq-item summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-family: var(--font-mono); color: var(--marke); font-size: 1.25rem; flex-shrink: 0; transition: transform 0.2s ease; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { margin: 0.85rem 0 0; color: var(--text-soft); font-size: 0.9375rem; }

/* -- Kontakt ---------------------------------------------------------------------------------------- */

.kontakt-address {
  font-style: normal; display: flex; flex-direction: column; gap: 0.35rem;
  margin-block: var(--space-3);
  font-family: var(--font-mono); font-size: 0.95rem;
}
.kontakt-address a { text-decoration: none; color: var(--marke-hell); }

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

.site-footer { background: var(--anthrazit); color: #9a9c9f; padding-block: var(--space-4); }
.site-footer .brand-logo { filter: brightness(0) invert(1); opacity: 0.92; height: 1.9rem; }
.site-footer__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem; }
.site-footer__legal { display: flex; gap: 1.5rem; }
.site-footer__legal a { text-decoration: none; color: #9a9c9f; font-family: var(--font-mono); font-size: 0.875rem; }
.site-footer__legal a:hover { color: var(--marke-hell); }
.site-footer__copy { font-family: var(--font-mono); font-size: 0.8125rem; margin: 0; width: 100%; opacity: 0.6; }

/* -- Legal --------------------------------------------------------------------------------------------------- */

.legal { background: var(--bg-soft); padding-block: var(--space-5); scroll-margin-top: 5rem; }
.legal--alt { background: var(--bg); }
.legal__inner { max-width: 72ch; }
.legal__title { font-size: 2rem; margin-bottom: var(--space-3); }
.legal h3 { font-family: var(--font-body); text-transform: none; font-size: 1.125rem; font-weight: 600; margin-top: var(--space-3); }
.legal h4 { font-family: var(--font-body); text-transform: none; font-size: 1rem; font-weight: 600; margin-top: 1.25rem; }
.legal p { color: var(--text-soft); }

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

.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* -- Geräte im Einsatz --------------------------------------------------------------------- */

.geraete-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.geraete-item { margin: 0; border-radius: var(--radius); overflow: hidden; }
.geraete-item img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.geraete-item figcaption {
  font-family: var(--font-mono); font-size: 0.8125rem; color: #b7b8ba;
  padding: 0.75rem 0.1rem 0;
}
@media (max-width: 700px) { .geraete-grid { grid-template-columns: 1fr; } }

/* -- Ablauf/Prozess ------------------------------------------------------------------------- */

.process { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.75rem; }
.process__step { position: relative; padding-top: 2rem; border-top: 2px solid rgba(38,38,38,0.15); }
.process__num { font-family: var(--font-mono); font-size: 0.875rem; color: var(--marke); display: block; margin-bottom: 0.75rem; }
.process__step h3 { font-size: 1.35rem; margin-bottom: 0.5rem; }
.process__step p { font-size: 0.9375rem; color: var(--text-soft); margin: 0; }
@media (max-width: 900px) { .process { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .process { grid-template-columns: 1fr; } }

/* -- Warum-Werte -------------------------------------------------------------------------------- */

.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.value h3 { font-size: 1.1rem; text-transform: none; font-family: var(--font-body); font-weight: 600; margin-bottom: 0.5rem; }
.value p { font-size: 0.9375rem; color: var(--text-soft); margin: 0; }
@media (max-width: 900px) { .value-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .value-grid { grid-template-columns: 1fr; } }