/* ============================================
   BARTEKS - Exklusive Oberflächen
   Design System & Stylesheet
   ============================================ */

/* --- Google Font Import --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@200;300;400;500;600&display=swap');

/* --- CSS Custom Properties --- */
:root {
  --color-black: #1C1C1E;
  --color-dark: #252527;
  --color-dark-mid: #333336;
  --color-grey: #4A4A4A;
  --color-grey-light: #8A8A8A;
  --color-off-white: #F5F5F5;
  --color-white: #FFFFFF;
  --color-gold: #C5A55A;
  --color-gold-light: #D4B96C;
  --color-gold-dark: #A8893F;

  --font-primary: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;

  --fs-hero: clamp(2.5rem, 6vw, 5rem);
  --fs-h1: clamp(2rem, 4vw, 3.5rem);
  --fs-h2: clamp(1.5rem, 3vw, 2.5rem);
  --fs-h3: clamp(1.1rem, 2vw, 1.5rem);
  --fs-body: clamp(0.95rem, 1.2vw, 1.125rem);
  --fs-small: 0.875rem;
  --fs-nav: 1rem;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --spacing-xxl: 10rem;

  --max-width: 1400px;
  --max-text: 800px;

  --transition: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-fast: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-weight: 300;
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--color-white);
  background-color: var(--color-black);
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-gold);
}

ul, ol {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 200;
  line-height: 1.2;
  letter-spacing: 0.04em;
}

h1 {
  font-size: var(--fs-h1);
}

h2 {
  font-size: var(--fs-h2);
}

h3 {
  font-size: var(--fs-h3);
  font-weight: 300;
}

.text-uppercase {
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

.text-gold {
  color: var(--color-gold);
}

.text-grey {
  color: var(--color-grey-light);
}

.text-center {
  text-align: center;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.5rem 3rem;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: background var(--transition);
  background: transparent;
}

/* Gradient (sichtbar bei 0, verschwindet beim Scrollen) */
.nav::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 150%;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.85) 0%, rgba(255, 255, 255, 0.3) 40%, rgba(255, 255, 255, 0.1) 70%, transparent 100%);
  z-index: -1;
  pointer-events: none;
  opacity: calc(1 - var(--nav-scroll, 0));
}

/* Milchglas (unsichtbar bei 0, erscheint beim Scrollen) */
.nav::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, calc(0.08 * var(--nav-scroll, 0)));
  z-index: -1;
  pointer-events: none;
  opacity: var(--nav-scroll, 0);
}

.nav > a:first-child {
  position: absolute;
  left: 3rem;
}

.nav.scrolled {
  padding: 1rem 3rem;
}

.nav__logo {
  height: 60px;
  transition: height var(--transition);
}

.nav.scrolled .nav__logo {
  height: 42px;
}

.nav__links {
  display: flex;
  gap: 3rem;
  align-items: center;
}

.nav__link {
  font-size: var(--fs-nav);
  text-transform: lowercase;
  letter-spacing: 0.12em;
  font-weight: 300;
  color: var(--color-black);
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--transition);
  display: inline-block;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transition: width var(--transition);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__link:hover {
  color: var(--color-gold);
}

.nav__lang {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--color-grey);
  margin-left: 1rem;
  padding-left: 1rem;
  border-left: 1px solid var(--color-grey-light);
}

.nav__lang a {
  color: var(--color-grey);
}

.nav__lang a.active {
  color: var(--color-gold);
}

/* --- Nav Theme: no-gradient (malerei, boden, referenzen) --- */
[data-nav-theme="no-gradient"] .nav::before {
  opacity: 0;
}

/* --- Nav Theme: dark (atelier) --- */
[data-nav-theme="dark"] .nav::before {
  height: 500%;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.5) 15%, rgba(0, 0, 0, 0.25) 35%, rgba(0, 0, 0, 0.1) 55%, rgba(0, 0, 0, 0.03) 75%, transparent 100%);
}

[data-nav-theme="dark"] .nav__link {
  color: var(--color-white);
}

[data-nav-theme="dark"] .nav__lang {
  color: var(--color-grey-light);
  border-left-color: var(--color-dark-mid);
}

[data-nav-theme="dark"] .nav__lang a {
  color: var(--color-grey-light);
}

[data-nav-theme="dark"] .nav__lang a.active {
  color: var(--color-gold);
}

/* dark theme: scrolled → zurück zu weiß */
[data-nav-theme="dark"] .nav.scrolled .nav__link {
  color: var(--color-black);
}

[data-nav-theme="dark"] .nav.scrolled .nav__lang {
  color: var(--color-grey);
  border-left-color: var(--color-grey-light);
}

[data-nav-theme="dark"] .nav.scrolled .nav__lang a {
  color: var(--color-grey);
}

[data-nav-theme="dark"] .nav.scrolled .nav__lang a.active {
  color: var(--color-gold);
}

/* --- Nav Theme: light-soft (malerei) --- */
[data-nav-theme="light-soft"]:not([data-boden="true"]) .nav::before {
  height: 700%;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0.4) 10%, rgba(255, 255, 255, 0.2) 25%, rgba(255, 255, 255, 0.08) 45%, rgba(255, 255, 255, 0.02) 65%, transparent 100%);
}

/* --- Nav Theme: light-soft (boden - extended) --- */
[data-nav-theme="light-soft"][data-boden="true"] .nav::before {
  height: 700%;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0.4) 10%, rgba(255, 255, 255, 0.2) 25%, rgba(255, 255, 255, 0.08) 45%, rgba(255, 255, 255, 0.02) 65%, transparent 100%);
}

[data-boden="true"] .nav__link.active::after {
  background: #E8CC7A;
  transition: background var(--transition);
}

[data-boden="true"] .nav.scrolled .nav__link.active::after {
  background: var(--color-gold);
}

[data-nav-theme="light-soft"] .nav__link.active::after,
[data-nav-theme="light-strong"] .nav__link.active::after,
[data-nav-theme="light-extended"] .nav__link.active::after {
  background: var(--color-gold-dark);
  transition: background var(--transition);
}

[data-nav-theme="light-soft"] .nav.scrolled .nav__link.active::after,
[data-nav-theme="light-strong"] .nav.scrolled .nav__link.active::after,
[data-nav-theme="light-extended"] .nav.scrolled .nav__link.active::after {
  background: var(--color-gold);
}

/* --- Nav Theme: light-extended (referenzen) --- */
[data-nav-theme="light-extended"] .nav::before {
  height: 700%;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.85) 0%, rgba(255, 255, 255, 0.4) 10%, rgba(255, 255, 255, 0.2) 25%, rgba(255, 255, 255, 0.08) 45%, rgba(255, 255, 255, 0.02) 65%, transparent 100%);
}

/* --- Nav Theme: light-strong (stuck) --- */
[data-nav-theme="light-strong"] .nav::before {
  height: 700%;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.5) 10%, rgba(255, 255, 255, 0.25) 25%, rgba(255, 255, 255, 0.1) 45%, rgba(255, 255, 255, 0.03) 65%, transparent 100%);
}

/* Mobile Menu */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
  z-index: 1001;
  position: absolute;
  right: 3rem;
}

.nav__burger span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--color-white);
  transition: all var(--transition-fast);
}

.nav__burger.open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav__burger.open span:nth-child(2) {
  opacity: 0;
}

.nav__burger.open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: opacity 0.3s ease;
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 var(--spacing-md);
}

.hero__logo {
  height: 120px;
  margin: 0 auto var(--spacing-lg);
  filter: brightness(1.1);
}

.hero__title {
  font-size: var(--fs-hero);
  font-weight: 200;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: var(--spacing-sm);
  color: var(--color-white);
  text-shadow: 0 2px 40px rgba(0,0,0,0.5);
}

.hero__subtitle {
  font-size: var(--fs-h3);
  font-weight: 200;
  color: var(--color-black);
  letter-spacing: 0.15em;
  text-transform: lowercase;
}

.hero__toggle {
  position: absolute;
  bottom: 3rem;
  right: 3rem;
  z-index: 3;
  width: 44px;
  height: 24px;
  border: none;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.25);
  cursor: pointer;
  transition: background 0.3s ease;
  padding: 0;
}

.hero__toggle::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: var(--color-black);
  border-radius: 50%;
  transition: transform 0.3s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.hero.overlay-hidden .hero__toggle {
  background: var(--color-gold);
}

.hero.overlay-hidden .hero__toggle::after {
  transform: translateX(20px);
}

.hero__toggle:hover {
  background: rgba(0, 0, 0, 0.35);
}

.hero.overlay-hidden .hero__toggle:hover {
  background: var(--color-gold-dark, #B8963E);
}

.hero__overlay,
.hero__content {
  transition: opacity 0.6s ease-in-out;
}

.hero.overlay-hidden .hero__overlay {
  opacity: 0 !important;
  pointer-events: none !important;
}

.hero.overlay-hidden .hero__content {
  opacity: 0 !important;
  pointer-events: none !important;
}

.hero__scroll {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-grey-light);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  animation: pulse 2s ease-in-out infinite;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-gold), transparent);
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* --- Sections --- */
.section {
  padding: var(--spacing-xxl) var(--spacing-md);
}

.section--dark {
  background: var(--color-black);
}

.section--darker {
  background: var(--color-dark);
}

.section--light {
  background: var(--color-off-white);
  color: var(--color-black);
}

.section__container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section__header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section__label {
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--color-gold);
  margin-bottom: var(--spacing-sm);
  display: block;
}

.section__title {
  font-size: var(--fs-h1);
  font-weight: 200;
  margin-bottom: var(--spacing-md);
}

.section__text {
  max-width: var(--max-text);
  margin: 0 auto;
  color: var(--color-grey-light);
  font-weight: 300;
  line-height: 1.8;
}

.section--light .section__text {
  color: var(--color-grey);
}

/* --- Gold Divider --- */
.divider {
  width: 60px;
  height: 1px;
  background: var(--color-gold);
  margin: var(--spacing-md) auto;
}

/* --- Sparten Grid (Divisions) --- */
.sparten {
  display: grid;
  gap: 2px;
}

.sparte {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  min-height: 500px;
  display: flex;
  align-items: flex-end;
}

.sparte__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.sparte__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.2s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.sparte:hover .sparte__bg img {
  transform: scale(1.05);
}

.sparte__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(10, 10, 10, 0.85) 0%,
    rgba(10, 10, 10, 0.2) 50%,
    rgba(10, 10, 10, 0.1) 100%
  );
  transition: background var(--transition);
  z-index: 1;
}

.sparte:hover .sparte__overlay {
  background: linear-gradient(
    to top,
    rgba(10, 10, 10, 0.9) 0%,
    rgba(10, 10, 10, 0.3) 50%,
    rgba(10, 10, 10, 0.15) 100%
  );
}

.sparte__content {
  position: relative;
  z-index: 2;
  padding: var(--spacing-lg);
  width: 100%;
}

.sparte__number {
  font-size: 0.75rem;
  color: var(--color-gold);
  letter-spacing: 0.2em;
  margin-bottom: var(--spacing-xs);
}

.sparte__title {
  font-size: var(--fs-h2);
  font-weight: 200;
  text-transform: lowercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-xs);
  transition: color var(--transition);
}

.sparte:hover .sparte__title {
  color: var(--color-gold);
}

.sparte__desc {
  font-size: var(--fs-small);
  color: var(--color-grey-light);
  font-weight: 300;
  max-width: 400px;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition);
}

.sparte:hover .sparte__desc {
  opacity: 1;
  transform: translateY(0);
}

.sparte__arrow {
  position: absolute;
  right: var(--spacing-lg);
  bottom: var(--spacing-lg);
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-grey);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  z-index: 2;
}

.sparte:hover .sparte__arrow {
  border-color: var(--color-gold);
  background: var(--color-gold);
}

.sparte__arrow svg {
  width: 14px;
  height: 14px;
  stroke: var(--color-white);
  transition: transform var(--transition);
}

.sparte:hover .sparte__arrow svg {
  transform: translateX(2px);
  stroke: var(--color-black);
}

/* --- Referenzen Teaser --- */
.ref-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.ref-item {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
}

.ref-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1s ease;
}

.ref-item:hover img {
  transform: scale(1.05);
}

.ref-item__overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, 0);
  display: flex;
  align-items: flex-end;
  padding: var(--spacing-md);
  transition: background var(--transition);
}

.ref-item:hover .ref-item__overlay {
  background: rgba(10, 10, 10, 0.5);
}

.ref-item__label {
  font-size: var(--fs-small);
  letter-spacing: 0.1em;
  text-transform: lowercase;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition);
}

.ref-item:hover .ref-item__label {
  opacity: 1;
  transform: translateY(0);
}

/* --- CTA / Contact Teaser --- */
.cta {
  text-align: center;
  padding: var(--spacing-xxl) var(--spacing-md);
  background: var(--color-dark);
}

.cta__title {
  font-size: var(--fs-h2);
  font-weight: 200;
  margin-bottom: var(--spacing-md);
}

.cta__link {
  display: inline-block;
  padding: 1rem 3rem;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 400;
  transition: all var(--transition);
}

.cta__link:hover {
  background: var(--color-gold);
  color: var(--color-black);
}

/* --- Footer --- */
.footer {
  padding: var(--spacing-xl) var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--color-dark-mid);
  background: var(--color-black);
}

.footer__container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--spacing-lg);
}

.footer__logo {
  height: 40px;
  margin-bottom: var(--spacing-md);
  opacity: 0.7;
}

.footer__text {
  font-size: var(--fs-small);
  color: var(--color-grey-light);
  font-weight: 300;
  line-height: 1.8;
}

.footer__heading {
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-gold);
  margin-bottom: var(--spacing-sm);
  font-weight: 400;
}

.footer__links a {
  display: block;
  font-size: var(--fs-small);
  color: var(--color-grey-light);
  font-weight: 300;
  padding: 0.3rem 0;
}

.footer__links a:hover {
  color: var(--color-gold);
}

.footer__social {
  display: flex;
  gap: 1.5rem;
  margin-top: var(--spacing-sm);
}

.footer__social a {
  color: var(--color-grey-light);
  transition: color var(--transition-fast);
}

.footer__social a:hover {
  color: var(--color-gold);
}

.footer__social svg {
  width: 18px;
  height: 18px;
}

.footer__bottom {
  max-width: var(--max-width);
  margin: var(--spacing-lg) auto 0;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-dark-mid);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--color-grey);
}

.footer__bottom a {
  color: var(--color-grey);
}

.footer__bottom a:hover {
  color: var(--color-gold);
}

/* --- Sub-Page Hero --- */
.page-hero {
  position: relative;
  height: 70vh;
  min-height: 450px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.page-hero__bg {
  position: absolute;
  inset: 0;
}

.page-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(10, 10, 10, 0.9) 0%,
    rgba(10, 10, 10, 0.3) 50%,
    rgba(10, 10, 10, 0.2) 100%
  );
}

.page-hero__content {
  position: relative;
  z-index: 2;
  padding: var(--spacing-xl) var(--spacing-lg);
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.page-hero__label {
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--color-gold);
  margin-bottom: var(--spacing-sm);
}

.page-hero__title {
  font-size: var(--fs-hero);
  font-weight: 200;
  text-transform: lowercase;
  letter-spacing: 0.06em;
}

/* --- Service List --- */
.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.service {
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid rgba(197, 165, 90, 0.3);
}

.section--light .service {
  border-bottom-color: #e0e0e0;
}

.service__title {
  font-size: var(--fs-h3);
  font-weight: 300;
  margin-bottom: var(--spacing-sm);
  text-transform: lowercase;
  letter-spacing: 0.05em;
}

.service__text {
  font-size: var(--fs-small);
  color: var(--color-grey-light);
  line-height: 1.8;
}

.section--light .service__text {
  color: var(--color-grey);
}

/* --- Image Gallery --- */
.gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
}

.gallery--three {
  grid-template-columns: repeat(3, 1fr);
}

.gallery__item {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3/2;
  cursor: pointer;
}

.gallery__item--tall {
  aspect-ratio: 2/3;
  grid-row: span 2;
}

.gallery__item--wide {
  grid-column: span 2;
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1s ease;
}

.gallery__item:hover img {
  transform: scale(1.03);
}

/* --- Lightbox --- */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.97);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
}

.lightbox__close {
  position: absolute;
  top: 2rem;
  right: 2rem;
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--color-white);
  font-size: 1.5rem;
}

/* --- Contact Form --- */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-grey-light);
  margin-bottom: var(--spacing-xs);
  font-weight: 400;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  background: var(--color-dark);
  border: 1px solid var(--color-dark-mid);
  color: var(--color-white);
  font-family: var(--font-primary);
  font-size: var(--fs-body);
  font-weight: 300;
  transition: border-color var(--transition-fast);
  outline: none;
  border-radius: 0;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-gold);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.form-group select {
  cursor: pointer;
}

.form-submit {
  display: inline-block;
  padding: 1rem 3rem;
  background: transparent;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  font-family: var(--font-primary);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 400;
  cursor: pointer;
  transition: all var(--transition);
}

.form-submit:hover {
  background: var(--color-gold);
  color: var(--color-black);
}

/* --- Impressum / Legal --- */
.legal {
  padding: calc(80px + var(--spacing-xl)) var(--spacing-md) var(--spacing-xl);
  max-width: var(--max-text);
  margin: 0 auto;
}

.legal h1 {
  font-size: var(--fs-h2);
  margin-bottom: var(--spacing-lg);
}

.legal h2 {
  font-size: var(--fs-h3);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--color-gold);
}

.legal p {
  color: var(--color-grey-light);
  margin-bottom: var(--spacing-sm);
}

/* --- Scroll Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Mobile Menu Overlay --- */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.98);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  font-size: 1.5rem;
  font-weight: 200;
  text-transform: lowercase;
  letter-spacing: 0.1em;
  color: var(--color-white);
}

.mobile-menu a:hover {
  color: var(--color-gold);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .sparten {
    grid-template-columns: 1fr;
  }

  .footer__container {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
  }

  .ref-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav {
    padding: 1rem 1.5rem;
  }

  .nav.scrolled {
    padding: 0.75rem 1.5rem;
  }

  .nav__links {
    display: none;
  }

  .nav__burger {
    display: flex;
  }

  .hero__logo {
    height: 80px;
  }

  .section {
    padding: var(--spacing-xl) var(--spacing-sm);
  }

  .sparte {
    min-height: 350px;
  }

  .sparte__content {
    padding: var(--spacing-md);
  }

  .sparte__desc {
    opacity: 1;
    transform: translateY(0);
  }

  .sparte__arrow {
    right: var(--spacing-md);
    bottom: var(--spacing-md);
  }

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

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

  .gallery--three {
    grid-template-columns: 1fr;
  }

  .gallery__item--tall {
    grid-row: span 1;
    aspect-ratio: 3/2;
  }

  .gallery__item--wide {
    grid-column: span 1;
  }

  .footer__container {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }

  .page-hero {
    height: 50vh;
    min-height: 350px;
  }

  .page-hero__content {
    padding: var(--spacing-lg) var(--spacing-md);
  }

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

@media (max-width: 480px) {
  .hero__logo {
    height: 60px;
  }

  .sparte {
    min-height: 280px;
  }
}

/* --- SEO Text Section --- */
.seo-content {
  padding: var(--spacing-lg) var(--spacing-md);
  background: var(--color-dark);
  border-top: 1px solid var(--color-dark-mid);
}

.seo-content__inner {
  max-width: var(--max-text);
  margin: 0 auto;
  color: #9A9A9A;
  font-size: var(--fs-small);
  line-height: 1.8;
}

.seo-content h3 {
  color: #B0B0B0;
  margin-bottom: var(--spacing-sm);
  font-size: 1rem;
}

.seo-content p {
  margin-bottom: var(--spacing-sm);
}

/* --- Two Column Layout --- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  align-items: stretch;
}

.two-col__image {
  overflow: hidden;
}

.two-col__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 400px;
}

.two-col__text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--spacing-xl);
}

.two-col__text p {
  color: var(--color-grey-light);
  margin-bottom: var(--spacing-sm);
}

@media (max-width: 768px) {
  .two-col {
    grid-template-columns: 1fr;
  }

  .two-col__text {
    padding: var(--spacing-lg) var(--spacing-md);
  }
}