/* ============================================
   FUTURISTIC DIY KIT ASSEMBLY WEBSITE
   Bento-Box Grid & Isometric Clarity Design
   ============================================ */

:root {
  /* Color Palette */
  --color-primary: #6366F1;
  --color-secondary: #F8FAFC;
  --color-accent: #EC4899;
  --color-highlight: #10B981;
  --color-text: #1E293B;
  --color-text-light: #64748B;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8FAFC;
  --color-border: #E2E8F0;
  
  /* Typography */
  --font-primary: 'Space Grotesk', sans-serif;
  --font-mono: 'Roboto Mono', monospace;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Layout */
  --max-width: 1280px;
  --header-height: 80px;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

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

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

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

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

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

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

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

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

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

/* ============================================
   HEADER
   ============================================ */

.site-header {
  position: relative;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

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

.brand-name {
  font-size: clamp(1rem, 2vw, 1.35rem);
  font-weight: 700;
  color: var(--color-primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 15px;
  list-style: none;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.nav-link:hover {
  color: var(--color-primary);
  background: rgba(99, 102, 241, 0.1);
}

.burger-button {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 32px;
  height: 32px;
  padding: var(--space-sm);
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 10001;
  position: relative;
}

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

.burger-line {
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.burger-button.active .burger-line:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

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

.burger-button.active .burger-line:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100vh;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  padding: var(--space-2xl) var(--space-lg);
  padding-top: calc(var(--header-height) + var(--space-xl));
  transform: translateX(100%);
  opacity: 0;
  transition: all var(--transition-base);
  z-index: 9999;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-nav.active {
  transform: translateX(0);
  opacity: 1;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  padding: var(--space-lg) 0;
}

.mobile-nav-link {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  padding: var(--space-lg) var(--space-xl);
  border-radius: var(--radius-lg);
  display: block;
  transition: all var(--transition-base);
  text-align: center;
  border: 2px solid transparent;
  background: rgba(248, 250, 252, 0.8);
}

.mobile-nav-link:hover,
.mobile-nav-link:active {
  color: var(--color-primary);
  background: rgba(99, 102, 241, 0.1);
  border-color: var(--color-primary);
  transform: translateX(4px);
}

/* ============================================
   HERO BANNER (Full-Width)
   ============================================ */

.hero-banner {
  position: relative;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  opacity: 0.4;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  width: 100%;
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  margin: var(--space-xl);
  border-radius: var(--radius-xl);
}

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

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-light);
  max-width: 700px;
  margin: 0 auto var(--space-xl);
}

/* ============================================
   SECTION STYLES
   ============================================ */

.main-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg);
}

.content-section {
  margin-bottom: var(--space-3xl);
  padding: var(--space-2xl) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-title {
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.section-description {
  font-size: 1.125rem;
  color: var(--color-text-light);
  max-width: 700px;
  margin: 0 auto;
}

/* ============================================
   BENTO-BOX GRID
   ============================================ */

.bento-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
  max-width: 1200px;
  width: 100%;
}

.bento-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.bento-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.bento-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.bento-card:hover::before {
  transform: scaleX(1);
}

.bento-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
}

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

.bento-text {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ============================================
   ISOMETRIC GRID
   ============================================ */

.isometric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
  max-width: 1200px;
  width: 100%;
}

.isometric-item {
  background: var(--color-bg-alt);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
}

.isometric-item:hover {
  transform: perspective(1000px) rotateX(5deg) rotateY(-5deg);
  box-shadow: var(--shadow-glow);
}

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

/* ============================================
   BUTTONS & CTAs
   ============================================ */

.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  text-align: center;
  cursor: pointer;
  margin-top: 10px;
}

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

.btn-primary:hover {
  background: #4F46E5;
  transform: translateY(-2px);
  color: white;
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: white;
}

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

.contact-section {
  max-width: 800px;
  margin: 0 auto;
}

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

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  transition: all var(--transition-base);
  background: var(--color-bg);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 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 {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  cursor: pointer;
}

.checkbox-label {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* ============================================
   MAPS
   ============================================ */

.map-container {
  width: 100%;
  height: 400px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-top: var(--space-xl);
  border: 1px solid var(--color-border);
}

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

/* ============================================
   PRODUCTS GRID
   ============================================ */

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.product-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.product-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.product-info {
  padding: var(--space-lg);
}

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

.product-description {
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.product-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-mono);
}

/* ============================================
   SKILL MATRIX
   ============================================ */

.skill-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.skill-level {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.skill-level::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.skill-number {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  position: relative;
  z-index: 1;
}

.skill-label {
  font-size: 1.25rem;
  position: relative;
  z-index: 1;
}

/* ============================================
   GALLERY GRID
   ============================================ */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.gallery-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover .gallery-image {
  transform: scale(1.1);
}

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  padding: var(--space-lg);
  color: white;
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.gallery-item:hover .gallery-overlay {
  transform: translateY(0);
}

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

.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) var(--space-lg);
  margin-top: var(--space-3xl);
}

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

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

.footer-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

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

.footer-link {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  transition: color var(--transition-fast);
}

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

.footer-text {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.footer-bottom {
  max-width: var(--max-width);
  margin: var(--space-xl) auto 0;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* ============================================
   PRIVACY POPUP
   ============================================ */

.privacy-popup {
  position: fixed;
  bottom: var(--space-lg);
  left: var(--space-lg);
  right: var(--space-lg);
  max-width: 500px;
  background: white;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  box-shadow: var(--shadow-xl);
  z-index: 10000;
  transform: translateY(150%);
  transition: transform var(--transition-slow);
}

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

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

.popup-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.popup-text {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.popup-buttons {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ============================================
   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); }

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

@media (max-width: 1023px) {
  .nav-menu {
    display: none;
  }
  
  .burger-button {
    display: flex;
  }
  
  .mobile-nav {
    display: block;
  }
  
  .header-container {
    padding: var(--space-md);
  }
  
  .site-header {
    z-index: 10000;
  }
}

@media (max-width: 768px) {
  :root {
    --space-2xl: 3rem;
    --space-3xl: 4rem;
  }
  
  .hero-content {
    padding: var(--space-xl) var(--space-md);
    margin: var(--space-md);
  }
  
  .bento-grid,
  .isometric-grid,
  .products-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
  }
  
  .privacy-popup {
    left: var(--space-md);
    right: var(--space-md);
  }
}

@media (max-width: 480px) {
  .main-content {
    padding: var(--space-lg) var(--space-md);
  }
  
  .content-section {
    padding: var(--space-lg) 0;
  }
  
  .hero-banner {
    min-height: 50vh;
  }
  
  .btn {
    width: 100%;
    padding: var(--space-md);
  }
  
  .mobile-nav {
    padding: var(--space-xl) var(--space-md);
    padding-top: calc(var(--header-height) + var(--space-lg));
  }
  
  .mobile-nav-list {
    gap: var(--space-xs);
    padding: var(--space-md) 0;
  }
  
  .mobile-nav-link {
    font-size: 1rem;
    padding: var(--space-md) var(--space-lg);
  }
}

@media (max-width: 320px) {
  html {
    font-size: 14px;
  }
  
  .header-container {
    padding: var(--space-sm);
  }
  
  .hero-content {
    padding: var(--space-md);
    margin: var(--space-sm);
  }
  
  .mobile-nav {
    padding: var(--space-lg) var(--space-sm);
    padding-top: calc(var(--header-height) + var(--space-md));
  }
  
  .mobile-nav-link {
    font-size: 0.9375rem;
    padding: var(--space-sm) var(--space-md);
  }
}