/* ============================================
   Art Curation Website - Museum-Grade Futurism
   Ultra-Minimalism & Kinetic Grids
   ============================================ */

:root {
  /* Color Palette */
  --color-bg-primary: #0D0D0D;
  --color-bg-secondary: #1a1a1a;
  --color-accent-platinum: #E0E0E0;
  --color-text-primary: #FFFAF0;
  --color-text-secondary: #E0E0E0;
  --color-detail-mint: #33FF57;
  --color-overlay: rgba(13, 13, 13, 0.85);
  
  /* Typography */
  --font-primary: 'Inter', sans-serif;
  --font-secondary: 'Space Grotesk', sans-serif;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-xxl: 5rem;
  
  /* Borders & Radius */
  --border-thin: 1px solid var(--color-accent-platinum);
  --border-mint: 1px solid var(--color-detail-mint);
  --radius-sm: 4px;
  --radius-md: 8px;
  
  /* Shadows */
  --shadow-glow: 0 0 20px rgba(51, 255, 87, 0.2);
  --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.5);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Layout */
  --max-width-content: 1400px;
  --header-height: 80px;
}

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

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

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

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(255, 255, 255, 0.01) 2px,
      rgba(255, 255, 255, 0.01) 4px
    );
  pointer-events: none;
  z-index: 9999;
  opacity: 0.3;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(1.4rem, 4vw, 3rem);
  margin-bottom: var(--space-lg);
}

h2 {
  font-size: clamp(1.2rem, 3vw, 2rem);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: clamp(1rem, 2vw, 1.2rem);
  margin-bottom: var(--space-md);
}

p {
  font-size: clamp(0.875rem, 2vw, 1.125rem);
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

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

a:hover {
  color: var(--color-detail-mint);
}

/* ============================================
   Header
   ============================================ */

.site-header {
  position: relative;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: var(--border-thin);
  background-color: var(--color-bg-primary);
  z-index: 1000;
  min-height: var(--header-height);
}

.brand-name {
  font-family: var(--font-secondary);
  font-size: clamp(1rem, 2vw, 1.35rem);
  font-weight: 500;
  color: var(--color-text-primary);
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  gap: 20px;
  list-style: none;
  align-items: center;
}

.nav-menu li a {
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  position: relative;
  padding: var(--space-xs) 0;
}

.nav-menu li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-detail-mint);
  transition: width var(--transition-base);
}

.nav-menu li a:hover::after {
  width: 100%;
}

/* Burger Menu - Always visible in header */
.burger-toggle {
  display: block;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  position: relative;
  z-index: 10001;
  margin-left: auto;
}

.burger-icon {
  width: 24px;
  height: 18px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.burger-icon span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--color-accent-platinum);
  transition: all var(--transition-base);
}

.burger-toggle.active .burger-icon span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

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

.burger-toggle.active .burger-icon span:nth-child(3) {
  transform: rotate(-45deg) translate(8px, -8px);
}

/* Mobile Navigation */
@media (max-width: 1023px) {
  .nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-overlay);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    padding: var(--space-xl);
    padding-top: calc(var(--header-height) + var(--space-xl));
    gap: var(--space-lg);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    z-index: 998;
    border-top: var(--border-thin);
  }
  
  .nav-menu.active {
    transform: translateX(0);
  }
  
  .nav-menu li {
    width: 100%;
    border-bottom: var(--border-thin);
    padding-bottom: var(--space-md);
  }
  
  .nav-menu li a {
    font-size: 1.125rem;
    display: block;
    width: 100%;
  }
}

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

/* ============================================
   Hero Banners (Full-Width)
   ============================================ */

.hero-banner {
  width: 100vw;
  position: relative;
  margin-left: calc(-50vw + 50%);
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--space-xxl) var(--space-lg);
  overflow: hidden;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}


.hero-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    180deg,
    rgba(13, 13, 13, 0.75) 0%,
    rgba(13, 13, 13, 0.85) 50%,
    rgba(13, 13, 13, 0.95) 100%
  );
  z-index: 1;
}

.hero-image {
  display: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

.hero-content h1 {
  margin-bottom: var(--space-lg);
  color: var(--color-text-primary);
}

.hero-content p {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

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

main {
  width: 100%;
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: var(--space-xxl) var(--space-lg);
}

.content-section {
  margin-bottom: var(--space-xxl);
  padding: var(--space-xl) 0;
  position: relative;
  max-width: var(--max-width-content);
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.content-section::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 0;
  width: 2px;
  height: 60px;
  background: linear-gradient(
    180deg,
    var(--color-detail-mint) 0%,
    transparent 100%
  );
}

.content-section h2,
.content-section h3 {
  text-align: center;
}

.content-section > p {
  text-align: center;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   Grid Layouts
   ============================================ */

.grid-asymmetric {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) auto;
  max-width: 1200px;
  padding: 0 var(--space-md);
}

.grid-item {
  position: relative;
  padding: var(--space-lg);
  border: var(--border-thin);
  background-color: var(--color-bg-secondary);
  transition: transform var(--transition-base), border-color var(--transition-base);
  overflow: hidden;
  text-align: left;
}

.grid-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-detail-mint);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.grid-item:hover {
  transform: translateY(-4px);
  border-color: var(--color-detail-mint);
}

.grid-item:hover::before {
  transform: scaleX(1);
}

.grid-item-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  margin-bottom: var(--space-md);
  border: var(--border-thin);
  display: block;
}

/* ============================================
   Buttons & CTAs
   ============================================ */

.btn-primary {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  border: var(--border-mint);
  background-color: transparent;
  color: var(--color-detail-mint);
  font-family: var(--font-secondary);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  margin-top: 10px;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background-color: var(--color-detail-mint);
  transition: left var(--transition-base);
  z-index: -1;
}

.btn-primary:hover {
  color: var(--color-bg-primary);
}

.btn-primary:hover::before {
  left: 0;
}

.btn-secondary {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  border: var(--border-thin);
  background-color: transparent;
  color: var(--color-accent-platinum);
  font-family: var(--font-secondary);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-secondary:hover {
  border-color: var(--color-detail-mint);
  color: var(--color-detail-mint);
}

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

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

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-accent-platinum);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-md);
  background-color: var(--color-bg-secondary);
  border: var(--border-thin);
  color: var(--color-text-primary);
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: border-color var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-detail-mint);
  box-shadow: var(--shadow-glow);
}

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

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.checkbox-group input[type="checkbox"] {
  width: auto;
  margin-top: 4px;
  cursor: pointer;
}

.checkbox-group label {
  font-size: 0.875rem;
  text-transform: none;
  letter-spacing: 0;
  cursor: pointer;
}

/* ============================================
   Products
   ============================================ */

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) auto;
  max-width: 1200px;
  padding: 0 var(--space-md);
}

.product-card {
  border: var(--border-thin);
  padding: var(--space-lg);
  background-color: var(--color-bg-secondary);
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-detail-mint);
}

.product-image {
  width: 100%;
  height: 300px;
  object-fit: cover;
  margin-bottom: var(--space-md);
  border: var(--border-thin);
}

.product-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

.product-description {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.product-price {
  font-family: var(--font-secondary);
  font-size: 1.5rem;
  color: var(--color-detail-mint);
  font-weight: 600;
}

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

.site-footer {
  border-top: var(--border-thin);
  padding: var(--space-xl) var(--space-lg);
  margin-top: var(--space-xxl);
  background-color: var(--color-bg-secondary);
}

.footer-content {
  max-width: var(--max-width-content);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
}

.footer-section h4 {
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  color: var(--color-accent-platinum);
}

.footer-menu {
  list-style: none;
}

.footer-menu li {
  margin-bottom: var(--space-sm);
}

.footer-menu a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-menu a:hover {
  color: var(--color-detail-mint);
}

.footer-info {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.footer-copyright {
  text-align: center;
  padding-top: var(--space-lg);
  margin-top: var(--space-lg);
  border-top: var(--border-thin);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* ============================================
   Maps
   ============================================ */

.map-container {
  width: 100%;
  height: 400px;
  margin: var(--space-xl) 0;
  border: var(--border-thin);
  overflow: hidden;
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

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

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

.text-mint {
  color: var(--color-detail-mint);
}

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

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

.date {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

/* ============================================
   Privacy Popup
   ============================================ */

.privacy-popup {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  max-width: 400px;
  background-color: var(--color-bg-secondary);
  border: var(--border-mint);
  padding: var(--space-lg);
  z-index: 10000;
  box-shadow: var(--shadow-soft);
  transform: translateY(150%);
  transition: transform var(--transition-slow);
}

.privacy-popup.active {
  transform: translateY(0);
}

.privacy-popup-content {
  margin-bottom: var(--space-md);
}

.privacy-popup-content p {
  font-size: 0.875rem;
  margin-bottom: var(--space-sm);
}

.privacy-popup-buttons {
  display: flex;
  gap: var(--space-sm);
}

.privacy-popup-buttons button {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  border: var(--border-thin);
  background-color: transparent;
  color: var(--color-text-primary);
  cursor: pointer;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.privacy-popup-buttons button:hover {
  border-color: var(--color-detail-mint);
  color: var(--color-detail-mint);
}

/* ============================================
   Thank You & 404 Pages
   ============================================ */

.page-message {
  text-align: center;
  padding: var(--space-xxl) var(--space-lg);
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.page-message h1 {
  margin-bottom: var(--space-lg);
}

.page-message p {
  max-width: 600px;
  margin-bottom: var(--space-xl);
}

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

@media (max-width: 768px) {
  :root {
    --space-xxl: 3rem;
    --space-xl: 2rem;
  }
  
  .hero-banner {
    min-height: 50vh;
    padding: var(--space-xl) var(--space-md);
  }
  
  main {
    padding: var(--space-xl) var(--space-md);
  }
  
  .grid-asymmetric,
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .privacy-popup {
    right: var(--space-md);
    left: var(--space-md);
    max-width: none;
  }
}

@media (max-width: 480px) {
  .site-header {
    padding: var(--space-sm) var(--space-md);
  }
  
  .hero-banner {
    min-height: 40vh;
  }
  
  .content-section {
    padding: var(--space-lg) 0;
  }
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(51, 255, 87, 0.2);
  }
  50% {
    box-shadow: 0 0 30px rgba(51, 255, 87, 0.4);
  }
}

.glow-effect {
  animation: glow 2s ease-in-out infinite;
}