/* ============================================================
   Stardental Zwickau – Stylesheet
   ============================================================ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --blue:     #1e9bd2;
  --blue-dk:  #1480b0;
  --blue-lt:  #e6f5fb;
  --blue-border: rgba(30,155,210,0.25);
  --beige:    #f6f1e9;
  --beige2:   #ede6d8;
  --beige3:   #c8bfb2;
  --text:     #1a1917;
  --text-mid: #54504c;
  --text-lt:  #8a8580;
  --white:    #fdfcfa;
  --max:      1080px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Lato', sans-serif;
  font-size: 20px;
  line-height: 1.75;
  color: var(--text);
  background: var(--white);
}

h1, h2, h3 { font-family: 'Playfair Display', serif; line-height: 1.22; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 2.5rem; }

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  background: #fff;
  border-bottom: 3px solid var(--blue);
  box-shadow: 0 2px 18px rgba(30,155,210,.13);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto; padding: 0 2.5rem;
  height: 68px; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo img { height: 46px; display: block; }
.nav-links { list-style: none; display: flex; gap: 0; }
.nav-links li a {
  display: block; text-decoration: none;
  font-size: 0.85rem; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--text-mid);
  padding: .45rem 1.05rem; border-radius: 2px;
  transition: background .18s, color .18s;
}
.nav-links li a:hover { background: var(--blue); color: #fff; }
.nav-burger {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; padding: 4px; background: none; border: none;
}
.nav-burger span {
  display: block; width: 24px; height: 2px;
  background: var(--text-mid); border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── SLIDESHOW ── */
#slideshow { padding-top: 68px; position: relative; width: 100%; overflow: hidden; }
.slide { display: none; position: relative; width: 100%; height: 560px; }
.slide.active { display: block; }
.slide img { width: 100%; height: 100%; object-fit: cover; object-position: center 30%; display: block; }
.slide-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to right, rgba(0,0,0,.58) 0%, rgba(0,0,0,.2) 55%, transparent 100%);
}
.slide-content {
  position: absolute; top: 50%; left: 0; right: 0;
  transform: translateY(-50%);
  max-width: var(--max); margin: 0 auto; padding: 0 3rem;
}
.slide-tag {
  display: inline-block; font-size: .72rem; font-weight: 700;
  letter-spacing: .18em; text-transform: uppercase;
  color: #fff; background: var(--blue);
  padding: .28rem .9rem; border-radius: 2px; margin-bottom: 1rem;
}
.slide-content h2 {
  font-size: clamp(1.9rem, 3.8vw, 3.1rem); color: #fff;
  max-width: 560px; line-height: 1.18;
  text-shadow: 0 2px 12px rgba(0,0,0,.3); margin-bottom: .8rem;
}
.slide-content p {
  font-size: 1rem; color: rgba(255,255,255,.88);
  max-width: 420px; text-shadow: 0 1px 6px rgba(0,0,0,.3); margin-bottom: 1.8rem;
}
.slide-btn {
  display: inline-block; background: var(--blue); color: #fff;
  text-decoration: none; font-weight: 700;
  font-size: .78rem; letter-spacing: .1em; text-transform: uppercase;
  padding: .8rem 2rem; border-radius: 2px; transition: background .2s;
}
.slide-btn:hover { background: var(--blue-dk); }
.slide-dots {
  position: absolute; bottom: 1.5rem; left: 50%;
  transform: translateX(-50%); display: flex; gap: .6rem; z-index: 10;
}
.dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,.45); border: none; cursor: pointer;
  transition: background .2s, transform .2s;
}
.dot.active { background: #fff; transform: scale(1.3); }
.slide-arrow {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,.15); border: 1.5px solid rgba(255,255,255,.5);
  color: #fff; width: 46px; height: 46px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; z-index: 10; font-size: 1.3rem; transition: background .2s;
}
.slide-arrow:hover { background: var(--blue); border-color: var(--blue); }
.slide-arrow.prev { left: 1.5rem; }
.slide-arrow.next { right: 1.5rem; }

/* ── STATS ── */
.stats-band { background: var(--blue); padding: 1.6rem 0; }
.stats-band .wrap { display: flex; justify-content: space-around; gap: 1rem; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-item strong { display: block; font-family: 'Playfair Display', serif; font-size: 1.9rem; color: #fff; line-height: 1; }
.stat-item span { font-size: .78rem; color: rgba(255,255,255,.78); letter-spacing: .07em; text-transform: uppercase; }

/* ── SECTIONS ── */
.section { padding: 5rem 0; }
.section-alt { background: var(--beige); }
.section-tag { font-size: .85rem; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; color: var(--blue); display: block; margin-bottom: .55rem; }
.section-title { font-size: clamp(1.65rem, 2.8vw, 2.35rem); color: var(--text); margin-bottom: .9rem; }
.divider { width: 44px; height: 2px; background: var(--blue); margin-bottom: 1.75rem; }

/* ── INTRO ── */
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.intro-img { position: relative; padding-bottom: 16px; padding-right: 16px; }
.intro-img img {
  width: 100%; height: 480px; object-fit: cover; object-position: center;
  border-radius: 2px; display: block; border: 1px solid var(--blue-border);
}
.intro-img::after {
  content: ""; position: absolute; bottom: 0; right: 0;
  width: 60%; height: 60%; border: 2px solid var(--blue);
  border-radius: 2px; z-index: -1; opacity: .6;
}
.intro-text p { color: var(--text-mid); margin-bottom: 1.1rem; font-size: 1.1rem; }
.intro-list { list-style: none; margin-top: 1.3rem; }
.intro-list li {
  display: flex; align-items: flex-start; gap: .7rem;
  font-size: 1.1rem; color: var(--text-mid); margin-bottom: .6rem;
}
.intro-list li::before {
  content: ""; flex-shrink: 0; margin-top: .62rem;
  width: 7px; height: 7px; border-radius: 50%; background: var(--blue);
}

/* ── ÜBER UNS ── */
.ueber-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.ueber-text p { color: var(--text-mid); margin-bottom: 1rem; font-size: 1.1rem; }
.ueber-img { position: relative; padding-top: 16px; padding-left: 16px; }
.ueber-img img {
  width: 100%; height: 460px; object-fit: cover;
  border-radius: 2px; display: block; border: 1px solid var(--blue-border);
}
.ueber-img::before {
  content: ""; position: absolute; top: 0; left: 0; right: 16px; bottom: 16px;
  border: 2px solid rgba(30,155,210,.18); border-radius: 2px; z-index: -1;
}

/* ── LEISTUNGEN ── */
.leistungen-head { text-align: center; margin-bottom: 3rem; }
.leistungen-head .divider { margin: 0 auto 1.75rem; }
.leistungen-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.leistung-card {
  background: var(--white); border-radius: 2px; overflow: hidden;
  border: 1px solid var(--beige2); transition: transform .2s, box-shadow .2s;
}
.leistung-card:hover { transform: translateY(-4px); box-shadow: 0 8px 28px rgba(30,155,210,.12); }
.leistung-card-img { height: 175px; overflow: hidden; border-bottom: 2px solid var(--blue-border); }
.leistung-card-img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .4s; }
.leistung-card:hover .leistung-card-img img { transform: scale(1.05); }
.leistung-card-body { padding: 1.3rem 1.4rem 1.5rem; }
.leistung-card h3 { font-family: 'Playfair Display', serif; font-size: 1.4rem; margin-bottom: .45rem; color: var(--text); }
.leistung-card p { font-size: 1.1rem; color: var(--text-mid); line-height: 1.6; }

/* ── GALERIE ── */
.galerie-head { text-align: center; margin-bottom: 2.5rem; }
.galerie-head .divider { margin: 0 auto 1.75rem; }
.galerie-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: 200px 200px;
  gap: 6px;
}
.g-item { overflow: hidden; cursor: pointer; position: relative; }
.g-item img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .4s; }
.g-item:hover img { transform: scale(1.06); }
.g-item::after {
  content: "🔍"; position: absolute; inset: 0;
  background: rgba(30,155,210,.0);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem; color: #fff; opacity: 0;
  transition: opacity .25s, background .25s;
}
.g-item:hover::after { opacity: 1; background: rgba(30,155,210,.35); }
.g-wide { grid-column: span 2; }

/* ── LIGHTBOX ── */
.lightbox {
  display: none; position: fixed; inset: 0; z-index: 1000;
  background: rgba(10,10,10,.92);
  align-items: center; justify-content: center;
}
.lightbox.open { display: flex; }
.lb-inner {
  position: relative; max-width: 90vw; max-height: 90vh;
  display: flex; flex-direction: column; align-items: center;
}
.lb-slide { display: none; }
.lb-slide.active { display: block; }
.lb-slide img {
  max-width: 88vw; max-height: 78vh; object-fit: contain;
  border-radius: 2px; border: 1px solid rgba(30,155,210,.3);
  box-shadow: 0 8px 48px rgba(0,0,0,.6);
}
.lb-cap { color: rgba(255,255,255,.7); font-size: .85rem; text-align: center; margin-top: .8rem; letter-spacing: .04em; }
.lb-close {
  position: absolute; top: -2.5rem; right: 0;
  background: none; border: none; color: #fff;
  font-size: 1.8rem; cursor: pointer; line-height: 1;
  opacity: .7; transition: opacity .2s;
}
.lb-close:hover { opacity: 1; }
.lb-arrow {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,.1); border: 1.5px solid rgba(255,255,255,.3);
  color: #fff; width: 50px; height: 50px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: 1.5rem; transition: background .2s; z-index: 10;
}
.lb-arrow:hover { background: var(--blue); border-color: var(--blue); }
.lb-arrow.lb-prev { left: -4rem; }
.lb-arrow.lb-next { right: -4rem; }
.lb-counter { color: rgba(255,255,255,.5); font-size: .8rem; text-align: center; margin-top: .5rem; letter-spacing: .08em; }

/* ── TESTIMONIAL ── */
.testimonial-section { background: var(--text); padding: 4.5rem 0; text-align: center; }
.testimonial-section .section-tag { color: var(--blue); display: block; text-align: center; margin-bottom: 1rem; }
blockquote {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.12rem, 2vw, 1.5rem); color: var(--beige);
  font-style: italic; line-height: 1.55;
  max-width: 720px; margin: 0 auto 1.5rem; padding: 0 1rem;
}
.quote-author { font-size: .8rem; color: var(--text-lt); letter-spacing: .12em; text-transform: uppercase; }

/* ── VORTEILE ── */
.vorteile-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.vorteile-img { position: relative; padding-top: 16px; padding-right: 16px; }
.vorteile-img img { width: 100%; height: 420px; object-fit: cover; border-radius: 2px; border: 1px solid var(--blue-border); }
.vorteile-img::after {
  content: ""; position: absolute; top: 0; right: 0;
  width: 55%; height: 55%; border: 2px solid var(--blue);
  border-radius: 2px; z-index: -1; opacity: .5;
}
.vorteil-item { display: flex; gap: 1.1rem; margin-bottom: 1.7rem; align-items: flex-start; }
.v-num {
  flex-shrink: 0; width: 38px; height: 38px; background: var(--blue); color: #fff;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-family: 'Playfair Display', serif; font-size: 1rem;
}
.vorteil-item h3 { font-family: 'Lato', sans-serif; font-size: 1.2rem; font-weight: 700; color: var(--text); margin-bottom: .2rem; }
.vorteil-item p { font-size: 1.1rem; color: var(--text-mid); }

/* ── KONTAKT ── */
.kontakt-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; }
.kontakt-info p { color: var(--text-mid); margin-bottom: 1.8rem; font-size: 1.1rem; }
.k-row { display: flex; gap: 1rem; align-items: flex-start; margin-bottom: 1.1rem; }
.k-icon {
  width: 38px; height: 38px; background: var(--blue-lt);
  border: 1px solid rgba(30,155,210,.2); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; flex-shrink: 0;
}
.k-text strong { display: block; font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-lt); }
.k-text span { font-size: .95rem; color: var(--text); }
.k-text a { color: var(--text); text-decoration: none; }
.k-text a:hover { color: var(--blue); }
.map-box {
  border-radius: 2px; overflow: hidden; height: 340px;
  border: 1px solid var(--blue-border);
  box-shadow: 0 2px 12px rgba(30,155,210,.08);
}
.map-box iframe { width: 100%; height: 100%; border: 0; display: block; }

/* ── FOOTER ── */
footer { background: var(--text); padding: 2.2rem 0; }
.footer-inner {
  max-width: var(--max); margin: 0 auto; padding: 0 2.5rem;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem;
}
.footer-logo img { height: 40px; opacity: .85; }
footer p { font-size: .8rem; color: var(--text-lt); }
.footer-links { display: flex; gap: 1.4rem; }
.footer-links a { font-size: .78rem; color: var(--text-lt); text-decoration: none; letter-spacing: .06em; }
.footer-links a:hover { color: var(--blue); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .intro-grid, .ueber-grid, .vorteile-grid, .kontakt-grid {
    grid-template-columns: 1fr; gap: 2.5rem;
  }
  .ueber-grid .ueber-text { order: 1; }
  .ueber-grid .ueber-img  { order: 2; }
  .leistungen-grid { grid-template-columns: repeat(2, 1fr); }
  .galerie-grid { grid-template-columns: repeat(2, 1fr); grid-template-rows: auto; }
  .g-wide { grid-column: span 1; }
  .intro-img img, .ueber-img img, .vorteile-img img { height: 320px; }
  .lb-arrow.lb-prev { left: -2.5rem; }
  .lb-arrow.lb-next { right: -2.5rem; }
}

@media (max-width: 680px) {
  .wrap { padding: 0 1.2rem; }
  .nav-inner { padding: 0 1.2rem; }
  .nav-links {
    display: none; flex-direction: column;
    position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; border-bottom: 3px solid var(--blue);
    box-shadow: 0 6px 20px rgba(0,0,0,.1);
    padding: .5rem 0 1rem; gap: 0;
  }
  .nav-links.open { display: flex; }
  .nav-links li a { padding: .6rem 1.5rem; font-size: .85rem; }
  .nav-burger { display: flex; }
  .slide { height: 400px; }
  .slide-content { padding: 0 1.5rem; }
  .slide-content h2 { font-size: clamp(1.5rem, 6vw, 2rem); }
  .slide-arrow.prev { left: .5rem; }
  .slide-arrow.next { right: .5rem; }
  .section { padding: 3.5rem 0; }
  .leistungen-grid { grid-template-columns: 1fr; }
  .galerie-grid { grid-template-columns: repeat(2, 1fr); grid-template-rows: 140px 140px 140px; }
  .stats-band .wrap { gap: 1.5rem; }
  .stat-item strong { font-size: 1.5rem; }
  .lb-arrow { width: 36px; height: 36px; font-size: 1.1rem; }
  .lb-arrow.lb-prev { left: -1.8rem; }
  .lb-arrow.lb-next { right: -1.8rem; }
  .lb-slide img { max-width: 92vw; max-height: 65vh; }
  .footer-inner { flex-direction: column; text-align: center; }
}