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

:root {
  --fg: #1a1a1a;
  --bg: #f5f3ef;
  --accent: #b8966a;
  --muted: #8a8278;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

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

body {
  background-color: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Navigation ─────────────────────────────────────── */

header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 1.5rem 3rem;
  background-color: var(--bg);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--fg);
  text-transform: uppercase;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2.5rem;
}

nav a {
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg);
  transition: color 0.2s;
}

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

/* ── Burger / mobile nav ─────────────────────────────── */

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.burger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background-color: var(--fg);
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}

/* Animate to X when open */
.burger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 640px) {
  header {
    padding: 1.25rem 1.5rem;
  }

  .burger {
    display: flex;
  }

  nav ul {
    display: none;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--bg);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    padding: 0.5rem 0 1rem;
  }

  nav ul.open {
    display: flex;
  }

  nav ul li a {
    display: block;
    padding: 0.75rem 1.5rem;
  }
}

/* ── Hero ────────────────────────────────────────────── */

main {
  flex: 1;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
}

/* Left: image */
.hero-image-wrap {
  position: relative;
  overflow: hidden;
  background-color: #d9d4cc;
}

.hero-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: opacity 0.6s ease;
}

.image-caption {
  position: absolute;
  bottom: 1.5rem;
  left: 1.75rem;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.75);
}

/* Right: text */
.hero-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8rem 5rem 4rem 5rem;
}

h1 {
  font-size: clamp(3rem, 6vw, 6rem);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.tagline {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
}

.description {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--muted);
  max-width: 30ch;
  margin-bottom: 3rem;
}

.cta {
  display: inline-block;
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg);
  border-bottom: 1px solid var(--fg);
  padding-bottom: 0.25rem;
  transition: color 0.2s, border-color 0.2s;
  align-self: flex-start;
}

.cta:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ── Kategorie detail view ───────────────────────────── */

.project-card {
  cursor: pointer;
}

.kategorie-detail {
  display: none;
  padding: 7rem 3rem 6rem;
  min-height: 100vh;
}

.back-button {
  position: fixed;
  top: 5.2rem;
  left: 3rem;
  background: none;
  border: none;
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg);
  cursor: pointer;
  padding: 0;
  transition: color 0.2s;
  z-index: 200;
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  line-height: 1;
}

.back-arrow {
  font-size: 1rem;
  line-height: 1;
  letter-spacing: 0;
  margin-top: -3px;
}

.back-button span:not(.back-arrow) {
  line-height: 16px;
  height: 16px;
}

.back-button:hover {
  color: var(--accent);
}

.bilder-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3.5rem 2.5rem;
}

.bild-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.bild-img-wrap {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background-color: #d9d4cc;
}

.bild-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.bild-img-wrap img:hover {
  transform: scale(1.03);
}

.bild-card figcaption {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  line-height: 1.7;
}

/* ── Work / Project grid ─────────────────────────────── */

.work {
  padding: 6rem 3rem;
}

.section-title {
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 3rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3.5rem 2.5rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.project-img-wrap {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background-color: #d9d4cc;
}

.project-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.project-img-wrap img:hover {
  transform: scale(1.03);
}

.project-card figcaption {
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  line-height: 1.7;
}

/* ── Ausstellungen ───────────────────────────────────── */

.ausstellungen {
  padding: 6rem 3rem;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  content-visibility: auto;
  contain-intrinsic-size: auto 600px;
}

.exhibition-list {
  display: flex;
  flex-direction: column;
  gap: 5rem;
}

.exhibition-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.exhibition-img-wrap {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: #d9d4cc;
}

#das-bin-ich .exhibition-img-wrap {
  aspect-ratio: 3 / 4;
}


.exhibition-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.exhibition-img-wrap img:hover {
  transform: scale(1.03);
}

.exhibition-text h3 {
  font-size: clamp(1.25rem, 2.5vw, 2rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  margin-bottom: 1.25rem;
  line-height: 1.2;
}

.exhibition-text p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 48ch;
  margin-bottom: 1rem;
}

.exhibition-text p:last-child {
  margin-bottom: 0;
}


/* ── Contact ─────────────────────────────────────────── */

.contact {
  padding: 6rem 3rem;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  content-visibility: auto;
  contain-intrinsic-size: auto 300px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.contact-block {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.contact-label {
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.contact-block address,
.contact-block a {
  font-style: normal;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--fg);
  text-decoration: none;
}

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

/* ── Footer ──────────────────────────────────────────── */

footer {
  padding: 1.5rem 3rem;
  text-align: center;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}

footer a {
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.08em;
  transition: color 0.2s;
}

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

/* ── Responsive ──────────────────────────────────────── */

@media (max-width: 1024px) {
  .project-grid,
  .bilder-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem 2rem;
  }
}

@media (max-width: 768px) {
  header {
    padding: 1.25rem 1.5rem;
  }

  .hero {
    grid-template-columns: 1fr;
    grid-template-rows: 55vh auto;
  }

.hero-image-wrap {
    grid-row: 1;
  }

  .hero-text {
    padding: 3rem 1.75rem 4rem;
  }

  .description {
    max-width: none;
  }

  .back-button {
    position: static;
    margin-bottom: 1.5rem;
  }

  .kategorie-detail {
    padding: 5.5rem 1.5rem 4rem;
  }

  .bilder-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .work {
    padding: 4rem 1.5rem;
  }

  .ausstellungen {
    padding: 4rem 1.5rem;
  }

  .exhibition-item {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .exhibition-text p {
    max-width: none;
  }

  .project-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .contact {
    padding: 4rem 1.5rem;
  }

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