:root {
  --color-limestone: #E8E3DC;
  --color-graphite: #1F1F1F;
  --color-taupe: #8E857C;
  --color-gold: #C6A875;
  --color-alabaster: #FBFAF8;
  
  --font-serif: 'Playfair Display', 'Georgia', serif;
  --font-sans: 'Inter', 'Helvetica Neue', sans-serif;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --spacing-xxl: 8rem;
  
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--color-graphite);
  background-color: var(--color-alabaster);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-graphite);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-sm);
  font-size: clamp(1rem, 1.5vw, 1.125rem);
}

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

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

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

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
}

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(251, 250, 248, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--color-limestone);
  padding: var(--spacing-sm) 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
  .header-content {
    padding: 0 var(--spacing-lg);
  }
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--color-graphite);
}

nav ul {
  display: none;
  list-style: none;
  gap: var(--spacing-sm);
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-alabaster);
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-limestone);
}

@media (min-width: 1024px) {
  nav ul {
    display: flex;
    flex-direction: row;
    position: static;
    background: none;
    padding: 0;
    border: none;
  }
}

nav ul.active {
  display: flex;
}

nav a {
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: var(--spacing-xs) 0;
  display: block;
}

.burger {
  display: flex;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: var(--spacing-xs);
  background: none;
  border: none;
}

@media (min-width: 1024px) {
  .burger {
    display: none;
  }
}

.burger span {
  width: 24px;
  height: 1px;
  background-color: var(--color-graphite);
  transition: var(--transition);
}

.burger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.burger.active span:nth-child(2) {
  opacity: 0;
}

.burger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

main {
  margin-top: 70px;
}

.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-limestone);
  position: relative;
  padding: var(--spacing-xl) var(--spacing-md);
}

.hero-content {
  text-align: center;
  max-width: 800px;
}

.hero h1 {
  margin-bottom: var(--spacing-md);
  font-weight: 300;
}

.hero p {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--color-taupe);
  max-width: 600px;
  margin: 0 auto;
}

.section {
  padding: var(--spacing-xxl) 0;
}

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

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  font-weight: 300;
}

.editorial-block {
  max-width: 700px;
  margin: 0 auto;
  padding: var(--spacing-xl) 0;
}

.editorial-block p {
  font-size: clamp(1.125rem, 1.8vw, 1.25rem);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
  color: var(--color-taupe);
}

.image-text-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  margin: var(--spacing-xl) 0;
}

@media (min-width: 768px) {
  .image-text-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
  }
}

.image-text-grid.reverse {
  direction: rtl;
}

.image-text-grid.reverse > * {
  direction: ltr;
}

.image-text-grid img {
  width: 100%;
  height: 500px;
  object-fit: cover;
}

.material-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
}

.material-item {
  aspect-ratio: 1;
  overflow: hidden;
  position: relative;
}

.material-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

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

.project-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
}

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

.project-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

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

.contact-form {
  max-width: 600px;
  margin: var(--spacing-xl) auto;
}

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-taupe);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-limestone);
  background-color: var(--color-alabaster);
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-graphite);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-taupe);
}

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

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-xs);
  margin: var(--spacing-md) 0;
}

.checkbox-group input {
  width: auto;
  margin-top: 4px;
}

.submit-btn {
  background-color: var(--color-graphite);
  color: var(--color-alabaster);
  border: none;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color var(--transition);
}

.submit-btn:hover {
  background-color: var(--color-taupe);
}

.back-to-top {
  position: fixed;
  bottom: var(--spacing-md);
  right: var(--spacing-md);
  width: 50px;
  height: 50px;
  background-color: var(--color-graphite);
  color: var(--color-alabaster);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  z-index: 999;
  transition: background-color var(--transition);
}

.back-to-top.visible {
  display: flex;
}

.back-to-top:hover {
  background-color: var(--color-taupe);
}

footer {
  background-color: var(--color-graphite);
  color: var(--color-limestone);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-xxl);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
  .footer-content {
    padding: 0 var(--spacing-lg);
  }
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-section h3 {
  color: var(--color-alabaster);
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.footer-section ul {
  list-style: none;
}

.footer-section a {
  color: var(--color-limestone);
  font-size: 0.9rem;
  display: block;
  margin-bottom: var(--spacing-xs);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(232, 227, 220, 0.2);
  font-size: 0.85rem;
  color: var(--color-taupe);
}

.page-header {
  padding: var(--spacing-xl) 0;
  text-align: center;
  background-color: var(--color-limestone);
}

.page-header h1 {
  font-weight: 300;
}

.content-page {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

.content-page h2 {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.content-page h3 {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.content-page p {
  margin-bottom: var(--spacing-md);
}

.content-page ul,
.content-page ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.content-page li {
  margin-bottom: var(--spacing-xs);
}

.thankyou-page {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-sm);
}

.thankyou-page h1 {
  margin-bottom: var(--spacing-md);
}

.thankyou-page p {
  font-size: 1.125rem;
  color: var(--color-taupe);
  margin-bottom: var(--spacing-lg);
}

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

.mt-xl {
  margin-top: var(--spacing-xl);
}

.footer-text {
  color: var(--color-limestone);
  margin-bottom: var(--spacing-sm);
}

.footer-text-small {
  color: var(--color-limestone);
  font-size: 0.9rem;
}

@media (max-width: 767px) {
  .section {
    padding: var(--spacing-lg) 0;
  }
  
  .hero {
    min-height: 70vh;
    padding: var(--spacing-lg) var(--spacing-md);
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
}

@media (max-width: 320px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .header-content {
    padding: 0 var(--spacing-sm);
  }
  
  .logo {
    font-size: 1.2rem;
  }
  
  nav a {
    font-size: 0.8rem;
    padding: var(--spacing-xs) 0;
  }
  
  .hero {
    min-height: 60vh;
    padding: var(--spacing-md) var(--spacing-sm);
  }
  
  h1 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
  }
  
  h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  .section {
    padding: var(--spacing-md) 0;
  }
  
  .section-title {
    margin-bottom: var(--spacing-md);
  }
  
  .editorial-block {
    padding: var(--spacing-md) 0;
  }
  
  .editorial-block p {
    font-size: 0.95rem;
    line-height: 1.6;
  }
  
  .image-text-grid {
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
  }
  
  .image-text-grid img {
    height: 300px;
  }
  
  .material-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
  
  .project-gallery {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
  
  .contact-form {
    margin: var(--spacing-md) auto;
  }
  
  .form-group input,
  .form-group textarea,
  .form-group select {
    font-size: 0.9rem;
    padding: var(--spacing-xs);
  }
  
  .content-page {
    padding: var(--spacing-md) var(--spacing-sm);
  }
  
  .footer-content {
    padding: 0 var(--spacing-sm);
  }
  
  .footer-grid {
    gap: var(--spacing-md);
  }
  
  .footer-section {
    margin-bottom: var(--spacing-md);
  }
  
  .footer-section p {
    font-size: 0.85rem;
  }
  
  .footer-section a {
    font-size: 0.85rem;
  }
  
  .back-to-top {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    bottom: var(--spacing-sm);
    right: var(--spacing-sm);
  }
  
  .page-header {
    padding: var(--spacing-md) 0;
  }
  
  .submit-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.85rem;
  }
}