/* ============================================================
   Baucility GmbH – style.css
   Zero external dependencies · system fonts only
   ============================================================ */

/* ---- Custom Properties ---- */
:root {
  --navy:    #1B3B6F;
  --yellow:  #F5C400;
  --bg:      #F4F6F8;
  --white:   #FFFFFF;
  --text:    #1a1a2e;
  --text-muted: #5a6478;
  --radius:  6px;
  --shadow:  0 2px 16px rgba(27, 59, 111, 0.10);
  --transition: 0.25s ease;
  --header-h: 72px;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  font-size: 16px;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

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

a { color: inherit; text-decoration: none; }

address { font-style: normal; }

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2.5rem);
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  inset-inline: 0;
  height: var(--header-h);
  background: var(--white);
  z-index: 1000;
  box-shadow: 0 2px 12px rgba(0,0,0,0.10);
}

.header-inner {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo-link { display: flex; align-items: center; }

.logo {
  height: 44px;
  width: auto;
  object-fit: contain;
}

/* Nav */
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.main-nav a {
  display: block;
  padding: 0.4rem 0.75rem;
  color: var(--navy);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--navy);
  background: rgba(27,59,111,0.08);
}

.main-nav a.nav-cta {
  background: var(--yellow);
  color: var(--navy);
  font-weight: 700;
  padding: 0.4rem 1rem;
}

.main-nav a.nav-cta:hover { background: #e0b300; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  width: 40px;
  height: 40px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
@media (max-width: 820px) {
  .hamburger { display: flex; }

  .main-nav {
    position: fixed;
    inset-block: var(--header-h) 0;
    inset-inline: 0;
    background: var(--navy);
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow-y: auto;
  }

  .main-nav.is-open { display: flex; }

  .main-nav ul {
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
    width: 100%;
    padding: 2rem 1rem;
  }

  .main-nav a { font-size: 1.2rem; padding: 0.75rem 2rem; width: 100%; text-align: center; color: var(--white); }
  .main-nav a:hover, .main-nav a.active { background: rgba(255,255,255,0.12); color: var(--white); }
}

/* ============================================================
   HERO SECTIONS
   ============================================================ */
.section--hero {
  height: 100svh;
  min-height: 500px;
  background-image: var(--hero-img);
  background-size: cover;
  background-position: center;
  position: relative;
  margin-top: var(--header-h);
}

.section-hero {
  height: 320px;
  background-image: var(--hero-img);
  background-size: cover;
  background-position: center;
  position: relative;
}

@media (max-width: 600px) {
  .section-hero { height: 240px; }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(27,59,111,0.70) 0%, rgba(27,59,111,0.55) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.hero-overlay--sm {
  background: linear-gradient(to bottom, rgba(27,59,111,0.75) 0%, rgba(27,59,111,0.60) 100%);
  align-items: flex-start;
  justify-content: flex-end;
  padding: clamp(1.5rem, 4vw, 3rem);
  gap: 0.5rem;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.hero-content h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.15;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
  max-width: 800px;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: rgba(255,255,255,0.88);
  letter-spacing: 0.02em;
}

/* Section hero headings */
.hero-overlay--sm h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: var(--white);
  text-shadow: 0 1px 8px rgba(0,0,0,0.4);
}

.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--yellow);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn:hover { transform: translateY(-2px); box-shadow: 0 4px 18px rgba(0,0,0,0.2); }

.btn--primary {
  background: var(--yellow);
  color: var(--navy);
}

.btn--primary:hover { background: #e0b300; }

/* ============================================================
   SECTIONS
   ============================================================ */
.section { position: relative; }

.section--intro { padding-block: 5rem; }

.section--service { padding-block-end: 5rem; }

.section--alt { background: var(--white); }

/* ============================================================
   INTRO GRID
   ============================================================ */
.section-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

@media (max-width: 768px) {
  .section-grid { grid-template-columns: 1fr; gap: 2rem; }
}

.section-text h2 {
  font-size: clamp(1rem, 2vw, 1.1rem);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--yellow);
  margin-bottom: 1rem;
}

.section-text p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.75;
}

/* ============================================================
   CARDS (intro)
   ============================================================ */
.section-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 480px) {
  .section-cards { grid-template-columns: 1fr; }
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border-left: 3px solid var(--yellow);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(27,59,111,0.15);
}

.card-icon {
  width: 36px;
  height: 36px;
  color: var(--navy);
}

.card-icon svg { width: 100%; height: 100%; }

.card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
}

.card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ============================================================
   SERVICE BLOCKS
   ============================================================ */
.service-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  padding-top: 3rem;
  align-items: start;
}

@media (max-width: 768px) {
  .service-block { grid-template-columns: 1fr; gap: 1.5rem; padding-top: 2rem; }
}

.service-text p {
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 0.75rem;
}

.service-scope {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--navy);
  background: rgba(27,59,111,0.07);
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius);
  border-left: 3px solid var(--yellow);
}

.service-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.service-list li {
  padding-left: 1.5rem;
  position: relative;
  color: var(--text);
  font-size: 0.95rem;
}

.service-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 10px;
  height: 10px;
  background: var(--yellow);
  border-radius: 50%;
}

/* ============================================================
   KONTAKT
   ============================================================ */
.section--kontakt { padding-block-end: 5rem; }

.kontakt-block { padding-top: 3rem; }

.kontakt-cta {
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 2.5rem;
  text-align: center;
}

.kontakt-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 700px) {
  .kontakt-grid { grid-template-columns: 1fr; }
}

.kontakt-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: flex-start;
  transition: transform var(--transition), box-shadow var(--transition);
}

.kontakt-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(27,59,111,0.15);
}

.kontakt-icon {
  width: 40px;
  height: 40px;
  color: var(--navy);
  background: rgba(27,59,111,0.07);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}

.kontakt-icon svg { width: 100%; height: 100%; }

.kontakt-card h3 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.kontakt-link {
  color: var(--navy);
  font-weight: 600;
  transition: color var(--transition);
  word-break: break-word;
}

.kontakt-link:hover { color: var(--yellow); text-decoration: underline; }

.kontakt-link--big {
  font-size: 1.2rem;
  font-weight: 700;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,0.7);
  padding-block: 1.5rem;
  font-size: 0.875rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.site-footer nav { display: flex; gap: 1.5rem; }

.site-footer nav a {
  color: rgba(255,255,255,0.7);
  transition: color var(--transition);
}

.site-footer nav a:hover { color: var(--yellow); }

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .fade-in { opacity: 1; transform: none; transition: none; }
}