:root {
  --color-deep-graphite: #1D1C1C;
  --color-ash-gray: #3A3A3C;
  --color-space-gray: #1C1C1E;
  --color-bright-cyan: #00BFFF;
  --color-golden-yellow: #FFD700;
  --color-paper-white: #FDFDFD;
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  --max-width: 1280px;
  --grid-columns: 12;
  --grid-gap: 1.5rem;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-deep-graphite);
  background-color: var(--color-paper-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--color-deep-graphite);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-ash-gray);
}

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

a:hover {
  color: var(--color-deep-graphite);
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-columns), 1fr);
  gap: var(--grid-gap);
}

.grid-12 { grid-column: span 12; }
.grid-6 { grid-column: span 6; }
.grid-4 { grid-column: span 4; }
.grid-3 { grid-column: span 3; }

header {
  background-color: var(--color-paper-white);
  padding: var(--spacing-md) 0;
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 100;
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-deep-graphite);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.logo:hover {
  color: var(--color-bright-cyan);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-deep-graphite);
}

.nav-close {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-deep-graphite);
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  z-index: 101;
  padding: var(--spacing-xs);
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
}

nav ul {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
  align-items: center;
}

nav a {
  color: var(--color-deep-graphite);
  font-weight: 400;
  padding: var(--spacing-xs) var(--spacing-sm);
  transition: color var(--transition-fast);
}

nav a:hover {
  color: var(--color-bright-cyan);
}

.hero {
  position: relative;
  padding: var(--spacing-xl) 0;
  background: linear-gradient(135deg, var(--color-paper-white) 0%, #F0F0F0 100%);
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
}

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

.hero p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  max-width: 600px;
}

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

.product-card {
  background: var(--color-paper-white);
  border-radius: 8px;
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-bright-cyan), var(--color-golden-yellow));
}

.product-card img {
  width: 100%;
  height: auto;
  border-radius: 4px;
  margin-bottom: var(--spacing-sm);
}

.product-card h3 {
  color: var(--color-deep-graphite);
  margin-bottom: var(--spacing-xs);
}

.product-card p {
  color: var(--color-ash-gray);
  font-size: 0.95rem;
}

.masonry {
  column-count: 3;
  column-gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: var(--spacing-md);
  background: var(--color-paper-white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal);
}

.masonry-item:hover {
  transform: scale(1.02);
}

.masonry-item img {
  width: 100%;
  height: auto;
  display: block;
}

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 4px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  font-family: var(--font-body);
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-golden-yellow), #FFA500);
  color: var(--color-deep-graphite);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #FFA500, var(--color-golden-yellow));
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--color-bright-cyan);
  color: var(--color-paper-white);
}

.btn-secondary:hover {
  background: var(--color-deep-graphite);
  transform: translateY(-2px);
}

.filter-btn {
  background: var(--color-paper-white);
  color: var(--color-deep-graphite);
  border: 2px solid var(--color-ash-gray);
  margin: 0 var(--spacing-xs);
}

.filter-btn:hover {
  border-color: var(--color-bright-cyan);
  color: var(--color-bright-cyan);
}

.filter-btn.active {
  background: var(--color-bright-cyan);
  color: var(--color-paper-white);
  border-color: var(--color-bright-cyan);
}

.testimonials {
  padding: var(--spacing-xl) 0;
  background: var(--color-paper-white);
}

.testimonial-card {
  background: var(--color-paper-white);
  padding: var(--spacing-md);
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  position: relative;
  margin-bottom: var(--spacing-md);
}

.testimonial-card::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 20px;
  width: 60px;
  height: 60px;
  background: var(--color-bright-cyan);
  border-radius: 50%;
  opacity: 0.2;
  z-index: -1;
}

.testimonial-text {
  font-style: italic;
  margin-bottom: var(--spacing-sm);
  color: var(--color-ash-gray);
}

.testimonial-author {
  font-weight: 600;
  color: var(--color-deep-graphite);
}

.section-divider {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-ash-gray), transparent);
  margin: var(--spacing-xl) 0;
  opacity: 0.3;
}

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

.section-alt {
  background: linear-gradient(135deg, #F8F8F8 0%, var(--color-paper-white) 100%);
}

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--color-deep-graphite);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-sm);
  border: 2px solid var(--color-ash-gray);
  border-radius: 4px;
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

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

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

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

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

footer {
  background: var(--color-space-gray);
  color: var(--color-paper-white);
  padding: var(--spacing-md) 0;
  text-align: center;
  font-size: 0.9rem;
}

footer a {
  color: var(--color-bright-cyan);
}

footer a:hover {
  color: var(--color-golden-yellow);
}

.system-page {
  max-width: 800px;
  margin: var(--spacing-xl) auto;
  padding: var(--spacing-md);
}

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

.system-page h2 {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.system-page p {
  margin-bottom: var(--spacing-sm);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

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

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

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

@media (max-width: 768px) {
  .grid-6, .grid-4, .grid-3 {
    grid-column: span 12;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }

  .header-content {
    flex-wrap: wrap;
  }

  .logo {
    font-size: 1.5rem;
  }

  .nav-toggle {
    display: block;
  }
  
  nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-paper-white);
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
    z-index: 99;
  }
  
  nav.active {
    max-height: 500px;
  }
  
  nav.active .nav-close {
    display: flex;
  }
  
  nav ul {
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
    align-items: flex-start;
    padding-top: calc(var(--spacing-md) + 50px);
  }

  nav ul li {
    width: 100%;
  }

  nav ul li a {
    display: block;
    padding: var(--spacing-sm);
    width: 100%;
  }

  .masonry {
    column-count: 1;
    column-gap: var(--spacing-sm);
  }

  .masonry-item {
    margin-bottom: var(--spacing-sm);
  }

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

  .hero {
    padding: var(--spacing-lg) 0;
  }

  .hero h1 {
    font-size: 2rem;
    line-height: 1.2;
  }

  .hero p {
    font-size: 1rem;
    line-height: 1.5;
  }

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

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

  h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
  }

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

  h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
  }

  h4 {
    font-size: 1.25rem;
  }

  .product-card {
    padding: var(--spacing-sm);
  }

  .btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.95rem;
    width: 100%;
    text-align: center;
  }

  .filter-btn {
    width: auto;
    margin: var(--spacing-xs);
    font-size: 0.9rem;
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  .testimonial-card {
    padding: var(--spacing-sm);
  }

  .form-group input,
  .form-group textarea {
    font-size: 16px; /* Prevents zoom on iOS */
  }

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

  .system-page {
    padding: var(--spacing-sm);
  }

  footer {
    padding: var(--spacing-sm) 0;
    font-size: 0.85rem;
  }

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

  /* Thank you page specific styles for 768px */
  .thank-you-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
  }

  .thank-you-buttons .btn {
    width: 100%;
    margin: 0;
    display: block;
  }
}

@media (max-width: 320px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 var(--spacing-xs);
  }

  .header-content {
    padding: var(--spacing-xs) 0;
  }

  .logo {
    font-size: 1.1rem;
    letter-spacing: 0.02em;
  }

  .nav-toggle {
    font-size: 1.25rem;
    padding: var(--spacing-xs);
  }

  nav ul {
    padding: var(--spacing-sm);
    gap: var(--spacing-xs);
  }

  nav ul li a {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.9rem;
  }

  .hero {
    padding: var(--spacing-md) 0;
  }

  .hero h1 {
    font-size: 1.75rem;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
  }

  .hero p {
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
  }

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

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

  .product-card {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
  }

  .product-card h3 {
    font-size: 1.1rem;
  }

  .product-card p {
    font-size: 0.85rem;
  }

  .btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.85rem;
    width: 100%;
    display: block;
    text-align: center;
  }

  .filter-btn {
    width: auto;
    margin: 2px;
    font-size: 0.8rem;
    padding: 6px 10px;
  }

  h1 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xs);
  }

  h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
  }

  h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
  }

  h4 {
    font-size: 1.1rem;
  }

  p {
    font-size: 0.9rem;
    line-height: 1.5;
  }

  .masonry {
    column-gap: var(--spacing-xs);
  }

  .masonry-item {
    margin-bottom: var(--spacing-xs);
  }

  .masonry-item img {
    border-radius: 4px;
  }

  .testimonial-card {
    padding: var(--spacing-sm);
  }

  .testimonial-text {
    font-size: 0.9rem;
  }

  .testimonial-author {
    font-size: 0.85rem;
  }

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

  .form-group label {
    font-size: 0.9rem;
  }

  .form-group input,
  .form-group textarea {
    font-size: 16px; /* Prevents zoom on iOS */
    padding: var(--spacing-xs);
  }

  .form-group textarea {
    min-height: 120px;
  }

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

  .product-grid {
    gap: var(--spacing-xs);
  }

  .system-page {
    padding: var(--spacing-xs);
  }

  .system-page h1 {
    font-size: 1.5rem;
  }

  .system-page h2 {
    font-size: 1.25rem;
  }

  .system-page p {
    font-size: 0.9rem;
  }

  footer {
    padding: var(--spacing-sm) 0;
    font-size: 0.8rem;
  }

  footer p {
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
  }

  footer a {
    font-size: 0.8rem;
  }

  /* Icon adjustments for small screens */
  i[data-lucide] {
    width: 20px !important;
    height: 20px !important;
  }

  .product-card i[data-lucide] {
    width: 40px !important;
    height: 40px !important;
  }

  /* Thank you page specific styles for 320px */
  .thank-you-icon i[data-lucide] {
    width: 60px !important;
    height: 60px !important;
  }

  .thank-you-message {
    font-size: 0.95rem !important;
    line-height: 1.5;
    padding: 0 var(--spacing-xs);
  }

  .thank-you-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
    padding: 0 var(--spacing-xs);
  }

  .thank-you-buttons .btn {
    width: 100%;
    margin: 0;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    min-height: 44px; /* Better touch target */
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .hero-content {
    padding: 0 var(--spacing-xs);
  }
}