:root {
  --obsidian-black: #121212;
  --pale-mineral-white: #F5F3EE;
  --cool-concrete: #BEB9B2;
  --oxidized-metal: #8A7A68;
  --ash-gray: #2B2B2B;
  
  --font-serif: 'Playfair Display', 'Georgia', serif;
  --font-sans: 'Inter', 'Helvetica Neue', -apple-system, sans-serif;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --spacing-xxl: 10rem;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--pale-mineral-white);
  background-color: var(--obsidian-black);
  -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;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 8rem);
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 4rem);
  margin-bottom: var(--spacing-sm);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 2.5rem);
  margin-bottom: var(--spacing-sm);
}

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

a {
  color: var(--pale-mineral-white);
  text-decoration: none;
  transition: opacity 0.3s ease;
}

a:hover {
  opacity: 0.7;
}

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

.container {
  width: 100%;
  max-width: 1800px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (min-width: 769px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(18, 18, 18, 0.95);
  backdrop-filter: blur(10px);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--ash-gray);
}

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

.logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-links {
  display: none;
  list-style: none;
  gap: var(--spacing-lg);
}

@media (min-width: 769px) {
  .nav-links {
    display: flex;
  }
}

.burger {
  display: block;
  cursor: pointer;
  width: 30px;
  height: 30px;
  position: relative;
}

@media (min-width: 769px) {
  .burger {
    display: none;
  }
}

.burger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--pale-mineral-white);
  position: absolute;
  transition: all 0.3s ease;
}

.burger span:nth-child(1) {
  top: 8px;
}

.burger span:nth-child(2) {
  top: 14px;
}

.burger span:nth-child(3) {
  top: 20px;
}

.burger.active span:nth-child(1) {
  top: 14px;
  transform: rotate(45deg);
}

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

.burger.active span:nth-child(3) {
  top: 14px;
  transform: rotate(-45deg);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  background-color: var(--obsidian-black);
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--ash-gray);
}

.mobile-menu.active {
  display: block;
}

.mobile-menu ul {
  list-style: none;
}

.mobile-menu li {
  margin-bottom: var(--spacing-md);
}

.mobile-menu a {
  font-size: 1.25rem;
  display: block;
  border-bottom: 1px solid var(--ash-gray);
}

/* Main Content */
main {
  margin-top: 60px;
  min-height: calc(100vh - 60px);
}

/* Footer */
footer {
  background-color: var(--ash-gray);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-xxl);
  border-top: 1px solid var(--oxidized-metal);
}

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

@media (min-width: 769px) {
  .footer-content {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

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

.footer-section p,
.footer-section a {
  font-size: 0.875rem;
  color: var(--cool-concrete);
  line-height: 1.8;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--oxidized-metal);
}

.footer-legal a {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--pale-mineral-white);
  background-color: transparent;
  color: var(--pale-mineral-white);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn:hover {
  background-color: var(--pale-mineral-white);
  color: var(--obsidian-black);
}

/* Forms */
form {
  max-width: 600px;
}

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

label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--cool-concrete);
}

input[type="text"],
input[type="email"],
select,
textarea {
  width: 100%;
  padding: var(--spacing-sm);
  background-color: var(--ash-gray);
  border: 1px solid var(--oxidized-metal);
  color: var(--pale-mineral-white);
  font-family: var(--font-sans);
  font-size: 1rem;
}

input[type="text"]:focus,
input[type="email"]:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--pale-mineral-white);
}

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

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

input[type="checkbox"] {
  margin-top: 4px;
}

/* Scroll to top */
.scroll-top {
  position: fixed;
  bottom: var(--spacing-md);
  right: var(--spacing-md);
  width: 50px;
  height: 50px;
  background-color: var(--ash-gray);
  border: 1px solid var(--oxidized-metal);
  color: var(--pale-mineral-white);
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  transition: all 0.3s ease;
  z-index: 999;
}

.scroll-top.visible {
  display: flex;
}

.scroll-top:hover {
  background-color: var(--pale-mineral-white);
  color: var(--obsidian-black);
}

/* Utility Classes */
.text-center {
  text-align: center;
}

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

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.py-xl {
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
}

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

/* Responsive */
@media (max-width: 767px) {
  :root {
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
  }
  
  h1 {
    font-size: clamp(2rem, 10vw, 4rem);
  }
  
  .section {
    padding: var(--spacing-lg) 0;
  }
}

@media (max-width: 320px) {
  :root {
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .logo {
    font-size: 1rem;
  }
  
  h1 {
    font-size: clamp(1.5rem, 12vw, 3rem);
    margin-bottom: var(--spacing-sm);
  }
  
  h2 {
    font-size: clamp(1.25rem, 8vw, 2rem);
  }
  
  h3 {
    font-size: clamp(1rem, 6vw, 1.5rem);
  }
  
  p {
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
  }
  
  .nav-links {
    gap: var(--spacing-sm);
  }
  
  .nav-links a {
    font-size: 0.75rem;
  }
  
  .mobile-menu a {
    font-size: 1rem;
  }
  
  .btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
  }
  
  footer {
    padding: var(--spacing-lg) 0 var(--spacing-sm);
  }
  
  .footer-section p,
  .footer-section a {
    font-size: 0.75rem;
  }
  
  .footer-legal {
    flex-direction: column;
    gap: var(--spacing-xs);
  }
  
  .footer-legal a {
    font-size: 0.625rem;
  }
  
  input[type="text"],
  input[type="email"],
  select,
  textarea {
    padding: var(--spacing-xs);
    font-size: 0.875rem;
  }
  
  .scroll-top {
    width: 40px;
    height: 40px;
    font-size: 1.25rem;
    bottom: var(--spacing-sm);
    right: var(--spacing-sm);
  }
}