/* =============================================
   DESIGN TOKENS
   ============================================= */
:root {
  --color-bg:      #f5fcf4; /* fef5fe */
  --color-text:    #1A1A1A;
  --color-muted:   #6B6B6B;
  --color-accent:  #FC4ED9;
  --color-accent-light: #E8F0E9;
  --color-border:  #E0E0DC;
  --color-white:   #FFFFFF;

  --font-head: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;

  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  7rem;

  --max-w: 1100px;
  --nav-h: 64px;

  --transition: 0.2s ease;
}

/* =============================================
   RESET & BASE
   ============================================= */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

/* =============================================
   TYPOGRAPHY
   ============================================= */
h1, h2, h3 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.6rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); font-weight: 600; }

p {
  max-width: 65ch;
}

/* =============================================
   LAYOUT HELPERS
   ============================================= */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

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

/* =============================================
   NAVIGATION
   ============================================= */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  transition: box-shadow var(--transition);
}

.nav.scrolled {
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  text-decoration: none;
  color: var(--color-text);
}

.nav__logo img {
  height: 36px;
  width: auto;
}

.nav__logo-text {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.nav__links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.nav__links a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: color var(--transition);
}

.nav__links a:hover {
  color: var(--color-accent);
}

/* Mobile nav toggle */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
}

.nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition);
}

/* =============================================
   HERO
   ============================================= */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: calc(var(--nav-h) + var(--space-lg));
  padding-inline: var(--space-md);
  padding-bottom: var(--space-xl);
}

.hero__logo {
  width: clamp(200px, 85vw, 720px);
  margin-bottom: var(--space-md);
}

.hero__title {
  margin-bottom: var(--space-sm);
}

.hero__tagline {
  color: var(--color-muted);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  max-width: 72ch;
  margin-bottom: var(--space-lg);
}

.hero__scroll {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
}

.hero__scroll-arrow {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollPulse 1.8s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.1); }
}

/* =============================================
   SECTION: KONZEPT
   ============================================= */
.konzept {
  background: var(--color-white);
}

.konzept__header {
  text-align: center;
  margin-bottom: var(--space-xs);
  font-weight: 600;
}

.konzept__label {
  display: inline-block;
  color: var(--color-accent);
  font-size: 1.5rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.konzept__steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
}

.konzept__step {
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  position: relative;
}

.konzept__step h3 {
  margin-bottom: var(--space-xs);
}

.konzept__step p {
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* =============================================
   SECTION: ÜBER UNS
   ============================================= */
.about {
  background: var(--color-bg);
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.about__label {
  display: inline-block;
  color: var(--color-accent);
  font-size: 1.5rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  font-weight: 600;
}

.about__text h2 {
  margin-bottom: var(--space-md);
}

.about__text p {
  color: var(--color-muted);
  margin-bottom: var(--space-sm);
}

.about__image {
  background: var(--color-bg);
  color: var(--color-accent);
  font-size: 0.775rem;
}

.about__image img {
  aspect-ratio: 4/5;
  width: 100%;
  object-fit: cover;
  border-radius: 4px;
}

.photo-credit {
  color: var(--color-text);
}

/* =============================================
   SECTION: IMPRESSIONEN
   ============================================= */
.impressionen {
  background: var(--color-white);
}

.impressionen__header {
  text-align: center;
  margin-bottom: var(--space-xs);
  font-weight: 600;
}

.impressionen__label {
  display: inline-block;
  color: var(--color-accent);
  font-size: 1.5rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.impressionen__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 260px;
  gap: 8px;
  grid-auto-flow: dense;
}

.impressionen__item {
  cursor: pointer;
  overflow: hidden;
  border-radius: 3px;
  background: var(--color-accent-light);
}

.impressionen__item:nth-child(1) {
  grid-column: span 2;
  grid-row: span 2;
}

.impressionen__item:nth-child(5),
.impressionen__item:nth-child(6),
.impressionen__item:nth-child(7) {
  grid-row: span 2;
}

.impressionen__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.impressionen__item:hover img {
  transform: scale(1.04);
}

/* Placeholder for items without real images */
.impressionen__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--color-accent-light);
}

/* =============================================
   LIGHTBOX
   ============================================= */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.92);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.lightbox.open {
  opacity: 1;
  pointer-events: all;
}

.lightbox__img {
  max-width: 90vw;
  max-height: 88vh;
  object-fit: contain;
  border-radius: 3px;
}

.lightbox__close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
  opacity: 0.7;
  transition: opacity var(--transition);
}

.lightbox__close:hover { opacity: 1; }

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: 1px solid rgba(255,255,255,0.3);
  color: #fff;
  font-size: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.6;
  transition: opacity var(--transition);
}

.lightbox__nav:hover { opacity: 1; }
.lightbox__prev { left: var(--space-md); }
.lightbox__next { right: var(--space-md); }

/* =============================================
   SECTION: KONTAKT
   ============================================= */
.kontakt {
  background: var(--color-bg);
  text-align: center;
}

.kontakt__label {
  display: inline-block;
  color: var(--color-accent);
  font-size: 1.5rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  font-weight: 600;
}

.kontakt h2 {
  margin-bottom: var(--space-md);
}

.kontakt__body {
  color: var(--color-muted);
  margin-inline: auto;
  margin-bottom: var(--space-md);
  font-size: 1.05rem;
}

.kontakt__email {
  display: inline-block;
  font-family: var(--font-head);
  font-size: clamp(0.95rem, 2vw, 1.2rem);
  color: var(--color-text);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 2px;
  user-select: all;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.5);
  text-align: center;
  padding-block: var(--space-md);
  font-size: 0.8rem;
}

.footer strong {
  color: rgba(255,255,255,0.8);
  font-family: var(--font-head);
}

/* =============================================
   RESPONSIVE — TABLET
   ============================================= */
@media (max-width: 768px) {
  .about__inner {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .about__image img {
    aspect-ratio: 3/2;
  }

  .impressionen__grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 200px;
  }

  .impressionen__item:nth-child(1) {
    grid-column: span 2;
    grid-row: span 2;
  }
}

/* =============================================
   RESPONSIVE — MOBILE
   ============================================= */
@media (max-width: 540px) {
  section {
    padding-block: var(--space-lg);
  }

  .nav__links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-sm) var(--space-md) var(--space-md);
    gap: var(--space-sm);
  }

  .nav__links.open {
    display: flex;
  }

  .nav__links a {
    font-size: 1rem;
  }

  .nav__burger {
    display: flex;
  }

  .impressionen__grid {
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: 160px;
  }

  .impressionen__item:nth-child(1) {
    grid-column: span 2;
    grid-row: span 2;
  }

  .konzept__steps {
    grid-template-columns: 1fr;
  }

  .lightbox__prev { left: var(--space-xs); }
  .lightbox__next { right: var(--space-xs); }
}