/* Boner Bau AG – Redesign
   Design: Alpines Premium, Prättigau-Bezug, 70 Jahre Tradition
   Fonts: Fraunces (display) + Inter (body) */

:root {
  --c-ink: #0F1A1D;
  --c-ink-soft: #2A3438;
  --c-stone: #E8E4DD;
  --c-stone-light: #F2EFE9;
  --c-snow: #FAFAF8;
  --c-pine: #2F4F3A;
  --c-pine-dark: #1F3525;
  --c-accent: #C8362B;
  --c-line: #D4CDC3;
  --c-muted: #6B726F;

  --f-display: 'Fraunces', Georgia, serif;
  --f-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --container: 1280px;
  --radius: 2px;
}

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

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--f-body);
  color: var(--c-ink);
  background: var(--c-snow);
  line-height: 1.6;
  font-size: 16px;
  font-weight: 400;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s; }
a:hover { color: var(--c-accent); }

h1, h2, h3, h4, h5 {
  font-family: var(--f-display);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

/* ============ HEADER ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-snow);
  border-bottom: 1px solid var(--c-line);
  backdrop-filter: blur(8px);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  max-width: 1440px;
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--f-display);
  font-size: 22px;
  letter-spacing: 0.01em;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--c-ink);
  color: var(--c-snow);
  font-family: var(--f-display);
  font-size: 18px;
  font-weight: 500;
  border-radius: var(--radius);
}
.brand-text strong {
  display: block;
  font-weight: 500;
  font-size: 20px;
  color: var(--c-ink);
  line-height: 1.1;
}
.brand-text small {
  font-family: var(--f-body);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav a {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--c-ink-soft);
}
.nav a.active, .nav a:hover { color: var(--c-accent); }

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--c-ink);
  color: var(--c-snow);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: var(--radius);
  transition: background .2s;
}
.header-cta:hover { background: var(--c-pine); color: var(--c-snow); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--c-ink);
}

/* ============ HERO ============ */
.hero {
  position: relative;
  padding: 120px 0 100px;
  background:
    linear-gradient(180deg, rgba(15,26,29,0.05) 0%, rgba(15,26,29,0) 40%),
    var(--c-snow);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 80px;
  align-items: end;
}
.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-bottom: 28px;
}
.hero-label::before {
  content: "";
  width: 40px;
  height: 1px;
  background: var(--c-accent);
}
.hero h1 {
  font-size: clamp(48px, 7vw, 96px);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 0.98;
}
.hero h1 em {
  font-style: italic;
  font-weight: 400;
  color: var(--c-pine);
}
.hero-sub {
  max-width: 540px;
  font-size: 18px;
  color: var(--c-ink-soft);
  margin: 36px 0 44px;
  line-height: 1.6;
}
.hero-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 30px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .2s;
}
.btn-primary {
  background: var(--c-ink);
  color: var(--c-snow);
}
.btn-primary:hover { background: var(--c-pine); color: var(--c-snow); }
.btn-outline {
  background: transparent;
  color: var(--c-ink);
  border-color: var(--c-ink);
}
.btn-outline:hover { background: var(--c-ink); color: var(--c-snow); }
.btn-accent {
  background: var(--c-accent);
  color: var(--c-snow);
}
.btn-accent:hover { background: #A8291F; color: var(--c-snow); }

.hero-side {
  position: relative;
  padding: 40px 36px;
  background: var(--c-stone);
  border-left: 3px solid var(--c-accent);
}
.hero-side .year {
  font-family: var(--f-display);
  font-size: 108px;
  font-weight: 300;
  line-height: 0.9;
  color: var(--c-ink);
  letter-spacing: -0.03em;
}
.hero-side .year em { font-style: italic; color: var(--c-pine); }
.hero-side p {
  margin-top: 16px;
  font-size: 14px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-ink-soft);
}

/* ============ STATS BAR ============ */
.stats {
  background: var(--c-ink);
  color: var(--c-snow);
  padding: 70px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}
.stat {
  border-left: 1px solid rgba(255,255,255,0.15);
  padding-left: 28px;
}
.stat-num {
  font-family: var(--f-display);
  font-size: 64px;
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--c-snow);
}
.stat-num em { font-style: italic; color: #E8E4DD; }
.stat-label {
  margin-top: 12px;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
}

/* ============ SECTION GENERAL ============ */
.section {
  padding: 120px 0;
}
.section-alt { background: var(--c-stone-light); }
.section-head {
  max-width: 720px;
  margin-bottom: 72px;
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-bottom: 20px;
}
.section-label::before {
  content: "";
  width: 30px;
  height: 1px;
  background: var(--c-accent);
}
.section h2 {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 300;
}
.section h2 em { font-style: italic; color: var(--c-pine); }
.section-intro {
  margin-top: 24px;
  font-size: 18px;
  color: var(--c-ink-soft);
  max-width: 620px;
}

/* ============ FEATURE GRID (Leistungen) ============ */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}
.feature {
  background: var(--c-snow);
  padding: 48px 40px;
  transition: background .25s;
  position: relative;
  min-height: 320px;
  display: flex;
  flex-direction: column;
}
.feature:hover { background: var(--c-stone-light); }
.feature-num {
  font-family: var(--f-display);
  font-size: 14px;
  color: var(--c-accent);
  letter-spacing: 0.1em;
  margin-bottom: 28px;
}
.feature-icon {
  color: var(--c-pine);
  margin-bottom: 24px;
}
.feature h3 {
  font-size: 26px;
  margin-bottom: 14px;
}
.feature p {
  color: var(--c-ink-soft);
  font-size: 15px;
  flex: 1;
}
.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ink);
}
.feature-link:hover { color: var(--c-accent); }

/* ============ CTA SPLIT ============ */
.cta-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--c-snow);
}
.cta-split-img {
  background-size: cover;
  background-position: center;
  min-height: 520px;
  background-image: url('https://images.unsplash.com/photo-1464822759023-fed622ff2c3b?w=1200&q=80');
}
.cta-split-body {
  padding: 100px 80px;
  background: var(--c-pine);
  color: var(--c-snow);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.cta-split-body .section-label { color: rgba(255,255,255,0.7); }
.cta-split-body .section-label::before { background: var(--c-stone); }
.cta-split-body h2 { color: var(--c-snow); font-size: 48px; }
.cta-split-body h2 em { color: var(--c-stone); }
.cta-split-body p { margin: 24px 0 40px; color: rgba(255,255,255,0.85); font-size: 17px; }
.cta-split-body .btn-outline { color: var(--c-snow); border-color: var(--c-snow); }
.cta-split-body .btn-outline:hover { background: var(--c-snow); color: var(--c-pine); }

/* ============ REFERENZEN CARDS ============ */
.refs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.ref-card {
  background: var(--c-snow);
  border: 1px solid var(--c-line);
  overflow: hidden;
  transition: transform .3s, border-color .3s;
}
.ref-card:hover { transform: translateY(-4px); border-color: var(--c-ink); }
.ref-img {
  height: 260px;
  background-size: cover;
  background-position: center;
  background-color: var(--c-stone);
}
.ref-body { padding: 28px 30px; }
.ref-cat {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-accent);
  font-weight: 500;
}
.ref-card h3 {
  font-size: 22px;
  margin: 10px 0 8px;
}
.ref-card p {
  font-size: 14px;
  color: var(--c-muted);
}

/* ============ TESTIMONIAL ============ */
.testimonials {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}
.quote {
  background: var(--c-snow);
  padding: 48px 44px;
  border-top: 2px solid var(--c-accent);
}
.quote p {
  font-family: var(--f-display);
  font-size: 22px;
  line-height: 1.45;
  font-style: italic;
  color: var(--c-ink);
}
.quote-author {
  margin-top: 28px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}
.quote-author strong { color: var(--c-ink); font-weight: 600; }

/* ============ CTA BANNER ============ */
.cta-banner {
  padding: 120px 0;
  background: var(--c-ink);
  color: var(--c-snow);
  text-align: center;
}
.cta-banner h2 {
  color: var(--c-snow);
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 300;
  max-width: 900px;
  margin: 0 auto 32px;
}
.cta-banner h2 em { color: var(--c-accent); font-style: italic; }
.cta-banner p {
  max-width: 620px;
  margin: 0 auto 44px;
  color: rgba(255,255,255,0.75);
  font-size: 18px;
}

/* ============ PAGE HEADER (Subpages) ============ */
.page-head {
  padding: 140px 0 80px;
  background: var(--c-stone-light);
  border-bottom: 1px solid var(--c-line);
}
.breadcrumb {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--c-muted); }
.breadcrumb a:hover { color: var(--c-accent); }
.breadcrumb span { color: var(--c-ink); }
.page-head h1 {
  font-size: clamp(44px, 7vw, 88px);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1;
}
.page-head h1 em { font-style: italic; color: var(--c-pine); }
.page-head p {
  margin-top: 24px;
  font-size: 18px;
  color: var(--c-ink-soft);
  max-width: 640px;
}

/* ============ CONTENT BLOCKS (Subpages) ============ */
.content-split {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
}
.content-split h2 { font-size: 42px; font-weight: 300; margin-bottom: 24px; }
.content-split p { font-size: 16px; margin-bottom: 18px; color: var(--c-ink-soft); }
.content-split ul { margin: 20px 0; padding: 0; list-style: none; }
.content-split li {
  padding: 14px 0;
  border-bottom: 1px solid var(--c-line);
  font-size: 15px;
  color: var(--c-ink-soft);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.content-split li::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 1px;
  background: var(--c-accent);
  margin-top: 12px;
  flex-shrink: 0;
}
.aside-card {
  background: var(--c-stone-light);
  padding: 48px 40px;
  border-left: 3px solid var(--c-accent);
  align-self: start;
  position: sticky;
  top: 120px;
}
.aside-card h4 {
  font-family: var(--f-display);
  font-size: 22px;
  margin-bottom: 20px;
}
.aside-card dl { display: grid; grid-template-columns: 1fr; gap: 12px; }
.aside-card dt { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--c-muted); }
.aside-card dd { font-size: 15px; color: var(--c-ink); margin-bottom: 8px; }

/* ============ ABOUT / HISTORY ============ */
.history {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 80px;
}
.history-year {
  font-family: var(--f-display);
  font-size: 160px;
  font-weight: 300;
  color: var(--c-pine);
  line-height: 0.9;
  letter-spacing: -0.04em;
}
.history-year em { font-style: italic; color: var(--c-accent); }
.history h2 { font-size: 48px; font-weight: 300; margin-bottom: 24px; }
.history p { font-size: 17px; line-height: 1.7; color: var(--c-ink-soft); margin-bottom: 18px; }

/* ============ KONTAKT ============ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 80px;
}
.contact-info h3 {
  font-size: 28px;
  margin-bottom: 28px;
}
.contact-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--c-line);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.contact-item svg { color: var(--c-pine); flex-shrink: 0; }
.contact-item-label {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-muted);
  display: block;
  margin-bottom: 4px;
}
.contact-item strong { font-family: var(--f-display); font-weight: 500; font-size: 18px; }
.contact-form {
  background: var(--c-stone-light);
  padding: 56px 52px;
}
.contact-form h3 { font-size: 28px; margin-bottom: 28px; }
.form-row { margin-bottom: 20px; }
.form-row label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-bottom: 8px;
}
.form-row input, .form-row textarea, .form-row select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--c-line);
  background: var(--c-snow);
  font-family: var(--f-body);
  font-size: 15px;
  color: var(--c-ink);
  border-radius: var(--radius);
}
.form-row input:focus, .form-row textarea:focus {
  outline: none;
  border-color: var(--c-ink);
}
.form-row textarea { resize: vertical; min-height: 140px; }

/* ============ FOOTER ============ */
.site-footer {
  background: var(--c-ink);
  color: rgba(255,255,255,0.75);
  padding: 100px 0 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 80px;
}
.footer-brand h4 {
  font-family: var(--f-display);
  font-size: 32px;
  font-weight: 400;
  color: var(--c-snow);
  margin-bottom: 20px;
}
.footer-brand p { font-size: 14px; max-width: 340px; line-height: 1.7; }
.footer-col h5 {
  font-family: var(--f-body);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--c-snow);
  margin-bottom: 24px;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 12px; font-size: 14px; }
.footer-col a:hover { color: var(--c-accent); }
.footer-bottom {
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.15);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 12px;
  color: rgba(255,255,255,0.5);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 968px) {
  .nav, .header-cta { display: none; }
  .nav-toggle { display: block; }
  .hero { padding: 80px 0 60px; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .section { padding: 80px 0; }
  .features { grid-template-columns: 1fr; }
  .cta-split { grid-template-columns: 1fr; }
  .cta-split-body { padding: 60px 32px; }
  .cta-split-img { min-height: 300px; }
  .refs { grid-template-columns: 1fr; }
  .testimonials { grid-template-columns: 1fr; }
  .content-split, .history, .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .aside-card { position: static; }
  .history-year { font-size: 120px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .header-inner { padding: 16px 20px; }
  .stats-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .contact-form { padding: 36px 24px; }
  .feature { padding: 36px 28px; min-height: auto; }
}

/* ============ MOBILE NAV ============ */
.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 0 32px 24px;
  background: var(--c-snow);
  border-bottom: 1px solid var(--c-line);
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 12px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-ink-soft);
  border-bottom: 1px solid var(--c-line);
}
.mobile-nav a.active, .mobile-nav a:hover { color: var(--c-accent); }

/* ============ FEATURE LINK AS BLOCK ============ */
a.feature { text-decoration: none; color: inherit; display: flex; }
a.feature:hover { color: inherit; }
a.feature:hover .feature-link { color: var(--c-accent); }

/* ============ REF CARD LINK ============ */
a.ref-card { text-decoration: none; color: inherit; display: block; }
a.ref-card:hover { color: inherit; }

/* ============ MOBILE NAV ============ */
.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 0 32px 24px;
  background: var(--c-snow);
  border-bottom: 1px solid var(--c-line);
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 14px 0;
  font-size: 16px;
  font-weight: 500;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-ink);
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a.active { color: var(--c-accent); }

/* ============ HEADER SCROLLED ============ */
.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}

/* ============ STAT ANIMATION ============ */
.stat-num {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s ease, transform .6s ease;
}
.stat-num.visible {
  opacity: 1;
  transform: translateY(0);
}
.stat:nth-child(2) .stat-num { transition-delay: .1s; }
.stat:nth-child(3) .stat-num { transition-delay: .2s; }
.stat:nth-child(4) .stat-num { transition-delay: .3s; }

/* ============ GALLERY GRID (Referenzen) ============ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
@media (max-width: 968px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .gallery-grid { grid-template-columns: 1fr; }
}

/* ============ TEAM GRID ============ */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.team-card {
  text-align: center;
}
.team-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--c-stone);
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-pine);
}
.team-card h3 {
  font-size: 22px;
  margin-bottom: 4px;
}
.team-card p {
  font-size: 14px;
  color: var(--c-muted);
}
@media (max-width: 968px) {
  .team-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .team-grid { grid-template-columns: 1fr; }
}

/* ============ TIMELINE ============ */
.timeline {
  position: relative;
  padding-left: 48px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--c-line);
}
.timeline-item {
  position: relative;
  padding-bottom: 48px;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -40px;
  top: 6px;
  width: 10px;
  height: 10px;
  background: var(--c-accent);
  border-radius: 50%;
}
.timeline-item h3 {
  font-size: 20px;
  margin-bottom: 4px;
}
.timeline-item .timeline-year {
  font-family: var(--f-display);
  font-size: 14px;
  color: var(--c-accent);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}
.timeline-item p {
  font-size: 15px;
  color: var(--c-ink-soft);
  max-width: 560px;
}

/* ============ MAP EMBED ============ */
.map-embed {
  width: 100%;
  height: 400px;
  border: none;
  display: block;
  filter: grayscale(0.3);
}

/* ============ LEISTUNG DETAIL ============ */
.leistung-detail {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 80px;
  align-items: start;
}
.leistung-detail h2 {
  font-size: 42px;
  font-weight: 300;
  margin-bottom: 24px;
}
.leistung-detail p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-ink-soft);
  margin-bottom: 18px;
}
.leistung-detail ul {
  list-style: none;
  padding: 0;
  margin: 24px 0;
}
.leistung-detail li {
  padding: 14px 0;
  border-bottom: 1px solid var(--c-line);
  font-size: 15px;
  color: var(--c-ink-soft);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.leistung-detail li svg {
  color: var(--c-pine);
  flex-shrink: 0;
  margin-top: 2px;
}
@media (max-width: 968px) {
  .leistung-detail { grid-template-columns: 1fr; gap: 48px; }
}