/* ============================================
   Luxury Interior Design Studio - CSS
   Ultra-luxury • Architectural • Editorial • Minimal
   ============================================ */

:root {
  /* Primary Colors */
  --warm-white: #F6F4F1;
  --stone-beige: #E8E3DA;
  
  /* Secondary Colors */
  --greige: #BFB8AD;
  --soft-taupe: #A79E93;
  
  /* Accent Colors */
  --charcoal-black: #2B2B2B;
  --brushed-brass: #B08D57;
  
  /* Typography */
  --font-serif: 'Playfair Display', 'Georgia', serif;
  --font-sans: 'Inter', 'Helvetica Neue', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --spacing-xxl: 10rem;
  
  /* Transitions */
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.2s ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

* {
  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: 1.7;
  color: var(--charcoal-black);
  background-color: var(--warm-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography
   ============================================ */

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

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

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

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

a:hover {
  color: var(--brushed-brass);
}

/* ============================================
   Header & Navigation
   ============================================ */

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(246, 244, 241, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(43, 43, 43, 0.1);
  padding: var(--spacing-sm) var(--spacing-md);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  letter-spacing: 0.05em;
}

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

.nav-menu a {
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 300;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--charcoal-black);
  position: relative;
  z-index: 1001;
}

.menu-close {
  display: none;
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-md);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--charcoal-black);
  z-index: 1002;
  padding: 0.5rem;
}

/* ============================================
   Main Content
   ============================================ */

main {
  margin-top: 80px;
}

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

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

/* ============================================
   Hero Sections
   ============================================ */

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

.hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--charcoal-black);
  padding: var(--spacing-lg);
  background-color: rgba(246, 244, 241, 0.95);
  backdrop-filter: blur(10px);
  border: 2px solid var(--brushed-brass);
  border-radius: 4px;
  max-width: 90%;
  margin: 0 auto;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.hero-content h1 {
  color: var(--charcoal-black);
  margin-bottom: var(--spacing-md);
}

.hero-content p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--charcoal-black);
  max-width: 600px;
  margin: 0 auto;
}

.scroll-cue {
  position: absolute;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  opacity: 0.6;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-10px); }
}

/* ============================================
   Grid Systems
   ============================================ */

.grid {
  display: grid;
  gap: var(--spacing-md);
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background-color: transparent;
  border: 1px solid var(--charcoal-black);
  color: var(--charcoal-black);
  cursor: pointer;
  transition: all var(--transition-smooth);
  text-align: center;
}

.btn:hover {
  background-color: var(--charcoal-black);
  color: var(--warm-white);
}

.btn-primary {
  background-color: var(--charcoal-black);
  color: var(--warm-white);
}

.btn-primary:hover {
  background-color: var(--brushed-brass);
  border-color: var(--brushed-brass);
}

/* ============================================
   Forms
   ============================================ */

form {
  max-width: 600px;
  margin: 0 auto;
}

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

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

input[type="text"],
input[type="email"],
textarea,
select {
  width: 100%;
  padding: 1rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  background-color: var(--warm-white);
  border: 1px solid var(--greige);
  color: var(--charcoal-black);
  transition: border-color var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--charcoal-black);
}

textarea {
  min-height: 200px;
  resize: vertical;
}

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

.checkbox-group input[type="checkbox"] {
  width: auto;
  margin-top: 0.25rem;
}

.checkbox-group label {
  text-transform: none;
  font-size: 0.85rem;
  line-height: 1.5;
}

/* ============================================
   Footer
   ============================================ */

footer {
  background-color: var(--stone-beige);
  padding: var(--spacing-xl) var(--spacing-md);
  margin-top: var(--spacing-xxl);
  border-top: 1px solid var(--greige);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.footer-brand {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--soft-taupe);
}

.footer-links a:hover {
  color: var(--charcoal-black);
}

.footer-bottom {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--greige);
  text-align: center;
  font-size: 0.85rem;
  color: var(--soft-taupe);
}

/* ============================================
   Utility Classes
   ============================================ */

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

.text-large {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  line-height: 1.8;
}

.margin-large {
  margin: var(--spacing-xxl) auto;
}

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

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 1024px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .nav-menu {
    gap: var(--spacing-md);
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background-color: var(--warm-white);
    flex-direction: column;
    padding: var(--spacing-md);
    padding-top: 3rem;
    border-top: 1px solid var(--greige);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-smooth);
    max-height: calc(100vh - 80px);
    overflow-y: auto;
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  
  .menu-close {
    display: block;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .hero {
    height: 80vh;
    min-height: 500px;
  }
  
  .section {
    padding: var(--spacing-lg) 0;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
}

@media (max-width: 320px) {
  html {
    font-size: 12px;
  }
  
  header {
    padding: 0.5rem 0.75rem;
  }
  
  .logo {
    font-size: 1rem;
  }
  
  .menu-toggle {
    font-size: 1.25rem;
  }
  
  .nav-menu {
    top: 60px;
    padding: 0.75rem;
  }
  
  .nav-menu a {
    font-size: 0.8rem;
    padding: 0.5rem 0;
  }
  
  main {
    margin-top: 60px;
  }
  
  .container {
    padding: 0 0.75rem;
  }
  
  .section {
    padding: 2rem 0;
  }
  
  .hero {
    height: 70vh;
    min-height: 400px;
  }
  
  .hero-content {
    padding: 1rem;
    max-width: 95%;
  }
  
  .hero-content h1 {
    font-size: clamp(1.5rem, 8vw, 2.5rem);
    margin-bottom: 0.75rem;
  }
  
  .hero-content p {
    font-size: 0.9rem;
  }
  
  h1 {
    font-size: clamp(1.75rem, 8vw, 2.5rem);
    margin-bottom: 1rem;
  }
  
  h2 {
    font-size: clamp(1.5rem, 6vw, 2rem);
    margin-bottom: 1rem;
  }
  
  h3 {
    font-size: clamp(1.25rem, 5vw, 1.75rem);
    margin-bottom: 0.75rem;
  }
  
  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.8rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .footer-brand {
    font-size: 1rem;
  }
  
  .text-large {
    font-size: 1rem;
  }
  
  input[type="text"],
  input[type="email"],
  textarea,
  select {
    padding: 0.75rem;
    font-size: 0.9rem;
  }
  
  textarea {
    min-height: 150px;
  }
}