/* ============================================
   MATERIALS SCIENCE INTERFACE - STYLE SYSTEM
   ============================================ */

:root {
  /* Color Palette - Materials Science */
  --color-obsidian: #0C0C0D;
  --color-sinew: #E6C79C;
  --color-steel: #7A7A7A;
  --color-amber: #FF8C00;
  --color-dark: #1a1a1b;
  --color-light: #f5f5f5;
  --color-overlay: rgba(12, 12, 13, 0.85);
  
  /* Typography */
  --font-primary: 'Krona One', sans-serif;
  --font-secondary: 'Stardos Stencil', cursive;
  --font-body: 'Inter', sans-serif;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-xxl: 4rem;
  
  /* Borders & Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --border-thin: 1px solid var(--color-steel);
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(255, 140, 0, 0.3);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Layout */
  --max-width: 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-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-sinew);
  background-color: var(--color-obsidian);
  overflow-x: hidden;
}

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

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--color-sinew);
}

h1 {
  font-size: clamp(2rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 2rem);
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-steel);
}

.serial-number {
  font-family: var(--font-secondary);
  font-size: 0.875rem;
  color: var(--color-steel);
  letter-spacing: 2px;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.site-header {
  position: relative;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-overlay);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: var(--border-thin);
}

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

.brand-text {
  font-family: var(--font-primary);
  font-size: clamp(1rem, 2vw, 1.35rem);
  color: var(--color-sinew);
}

.main-nav {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.nav-list {
  display: flex;
  list-style: none;
  align-items: center;
}

.nav-link {
  font-size: 0.9375rem;
  color: var(--color-steel);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-amber);
  background: rgba(255, 140, 0, 0.1);
}

/* Burger Menu Button - Always Visible in Header */
.burger-toggle {
  display: flex;
  width: 32px;
  height: 32px;
  position: relative;
  z-index: 100001;
  flex-direction: column;
  justify-content: space-around;
  padding: 0;
  margin-left: var(--space-md);
}

.burger-line {
  width: 100%;
  height: 2px;
  background: var(--color-sinew);
  transition: all var(--transition-base);
  transform-origin: center;
}

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

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

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

/* Mobile Menu - Opens Separately from Header */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--color-obsidian);
  z-index: 999;
  padding: var(--space-xxl) var(--space-lg);
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform var(--transition-base);
  border-top: var(--border-thin);
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-top: var(--space-xxl);
}

.mobile-nav-link {
  font-size: 1.25rem;
  color: var(--color-sinew);
  padding: var(--space-md);
  border-bottom: var(--border-thin);
  display: block;
}

/* Responsive Navigation */
@media (max-width: 1023px) {
  .main-nav {
    display: none;
  }
  
  .mobile-menu {
    display: block;
  }
}

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

/* ============================================
   BANNER SECTIONS
   ============================================ */

.hero-banner {
  position: relative;
  width: 100vw;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
}

.banner-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  opacity: 0.35;
}

.banner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgba(12, 12, 13, 0.75),
    rgba(12, 12, 13, 0.95)
  );
  z-index: 2;
}

.banner-content {
  position: relative;
  z-index: 3;
  max-width: var(--max-width);
  width: 100%;
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  background: rgba(12, 12, 13, 0.3);
  backdrop-filter: blur(2px);
  border-radius: var(--radius-md);
}

.banner-title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-lg);
  text-shadow: 0 0 30px rgba(255, 140, 0, 0.5);
}

.banner-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.5rem);
  color: var(--color-steel);
  max-width: 800px;
  margin: 0 auto;
}

/* ============================================
   MAIN CONTENT
   ============================================ */

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

.content-section {
  margin-bottom: var(--space-xxl);
  padding: var(--space-xl) 0;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
  position: relative;
  padding-bottom: var(--space-md);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 2px;
  background: var(--color-amber);
}

/* ============================================
   GRID LAYOUTS
   ============================================ */

.grid-container {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--space-md);
}

.grid-two {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-three {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-four {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-item {
  background: rgba(26, 26, 27, 0.6);
  border: var(--border-thin);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: all var(--transition-base);
  backdrop-filter: blur(5px);
}

.grid-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: var(--color-amber);
}

.grid-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
  max-width: 100%;
}

.grid-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  color: var(--color-sinew);
}

.grid-text {
  color: var(--color-steel);
  font-size: 0.9375rem;
}

/* ============================================
   PRODUCT CARDS
   ============================================ */

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.product-card {
  background: rgba(26, 26, 27, 0.6);
  border: var(--border-thin);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-base);
  backdrop-filter: blur(5px);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-glow);
  border-color: var(--color-amber);
}

.product-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  max-width: 100%;
}

.product-title {
  font-size: 1.75rem;
  margin-bottom: var(--space-sm);
}

.product-description {
  color: var(--color-steel);
  margin-bottom: var(--space-md);
  line-height: 1.8;
}

.product-price {
  font-family: var(--font-secondary);
  font-size: 1.5rem;
  color: var(--color-amber);
  margin-top: var(--space-md);
}

/* ============================================
   CONTACT FORM
   ============================================ */

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.contact-form {
  background: rgba(26, 26, 27, 0.6);
  border: var(--border-thin);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  backdrop-filter: blur(5px);
}

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

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  color: var(--color-sinew);
  font-size: 0.9375rem;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  background: rgba(12, 12, 13, 0.8);
  border: var(--border-thin);
  border-radius: var(--radius-sm);
  color: var(--color-sinew);
  font-family: inherit;
  font-size: 1rem;
  transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-amber);
  box-shadow: 0 0 0 3px rgba(255, 140, 0, 0.1);
}

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

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

.checkbox-input {
  margin-top: 4px;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.checkbox-label {
  font-size: 0.875rem;
  color: var(--color-steel);
  line-height: 1.5;
}

.submit-button {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-amber);
  color: whitesmoke;
  font-family: var(--font-primary);
  font-size: 1rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  margin-top: 10px;
}

.submit-button:hover {
  background: #ff9f33;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.contact-info {
  background: rgba(26, 26, 27, 0.6);
  border: var(--border-thin);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  backdrop-filter: blur(5px);
}

.info-item {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: var(--border-thin);
}

.info-label {
  font-family: var(--font-secondary);
  font-size: 0.875rem;
  color: var(--color-steel);
  margin-bottom: var(--space-sm);
  letter-spacing: 1px;
}

.info-value {
  font-size: 1.125rem;
  color: var(--color-sinew);
}

.map-container {
  margin-top: var(--space-xl);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: var(--border-thin);
  height: 400px;
}

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

/* ============================================
   FOOTER
   ============================================ */

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

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-xl);
}

.footer-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer-title {
  font-family: var(--font-primary);
  font-size: 1rem;
  color: var(--color-sinew);
  margin-bottom: var(--space-sm);
}

.footer-link {
  font-size: 0.875rem;
  color: var(--color-steel);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-amber);
}

.footer-copyright {
  grid-column: 1 / -1;
  text-align: center;
  padding-top: var(--space-lg);
  border-top: var(--border-thin);
  margin-top: var(--space-lg);
  color: var(--color-steel);
  font-size: 0.875rem;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

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

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

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

/* ============================================
   SPECIAL PAGES
   ============================================ */

.policy-content {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

.policy-section {
  margin-bottom: var(--space-xl);
}

.policy-title {
  font-size: 2rem;
  margin-bottom: var(--space-lg);
  color: var(--color-sinew);
}

.policy-text {
  color: var(--color-steel);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.policy-date {
  font-family: var(--font-secondary);
  color: var(--color-amber);
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: var(--border-thin);
}

.thank-you-container {
  max-width: 800px;
  margin: var(--space-xxl) auto;
  padding: var(--space-xl);
  text-align: center;
  background: rgba(26, 26, 27, 0.6);
  border: var(--border-thin);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(5px);
}

.error-container {
  max-width: 600px;
  margin: var(--space-xxl) auto;
  padding: var(--space-xl);
  text-align: center;
}

.error-code {
  font-size: 6rem;
  font-family: var(--font-primary);
  color: var(--color-amber);
  margin-bottom: var(--space-md);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {

  .hero-banner {
    min-height: 50vh;
  }
  
  .contact-wrapper {
    grid-template-columns: 1fr;
  }
  
  .product-grid {
    grid-template-columns: 1fr;
  }
  
  .grid-two,
  .grid-three,
  .grid-four {
    grid-template-columns: 1fr;
  }
  
  .main-content {
    padding: var(--space-lg) var(--space-md);
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .banner-content {
    padding: var(--space-lg) var(--space-md);
  }
  
  .content-section {
    padding: var(--space-lg) 0;
  }
}

/* ============================================
   ANIMATIONS & EFFECTS
   ============================================ */

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

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

.stitch-marker {
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--color-amber);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--color-amber);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.2);
  }
}