/* ============================================
   FUTURISTIC BICYCLE UPCYCLING WEBSITE
   Glassmorphism Design System
   ============================================ */

:root {
  /* Color Palette */
  --color-obsidian: #0A0A0B;
  --color-cobalt: #2E5BFF;
  --color-mercury: #E0E0E0;
  --color-bio-green: #39FF14;
  --color-glass-bg: rgba(255, 255, 255, 0.05);
  --color-glass-border: rgba(255, 255, 255, 0.1);
  --color-text-primary: #E0E0E0;
  --color-text-secondary: #B0B0B0;
  --color-text-muted: #808080;
  
  /* Typography */
  --font-heading: 'Orbitron', sans-serif;
  --font-body: 'Roboto Mono', monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 0.9rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3rem;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Border & Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(46, 91, 255, 0.3);
  --shadow-glow-green: 0 0 20px rgba(57, 255, 20, 0.3);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Layout */
  --container-max-width: 1200px;
  --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: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-obsidian);
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(46, 91, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(57, 255, 20, 0.05) 0%, transparent 50%);
  background-attachment: fixed;
  min-height: 100vh;
  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-cobalt);
}

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

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

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

h1 {
  font-size: clamp(var(--font-size-xl), 5vw, var(--font-size-5xl));
}

h2 {
  font-size: clamp(var(--font-size-xl), 4vw, var(--font-size-4xl));
}

h3 {
  font-size: clamp(var(--font-size-xl), 3vw, var(--font-size-3xl));
}

h4 {
  font-size: clamp(var(--font-size-lg), 2.5vw, var(--font-size-2xl));
}

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

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

.site-header {
  position: relative;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-glass-border);
  z-index: 1000;
}

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

.brand-name {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-text-primary);

}

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

.nav-link {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: relative;
  padding: var(--space-sm) 0;
  transition: color var(--transition-base);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-cobalt);
  transition: width var(--transition-base);
}

.nav-link:hover {
  color: var(--color-cobalt);
}

.nav-link:hover::after {
  width: 100%;
}

.burger-toggle {
  display: none;
  position: relative;
  top: 6px;
  flex-direction: column;
  gap: 5px;
  width: 30px;
  height: 30px;
  padding: 0;
  background: transparent;
  z-index: 10001;
  margin-left: var(--space-lg);
}

/* Бургер-меню видно от самого маленького размера до 1023px */
@media (max-width: 1023px) {
  .burger-toggle {
    display: flex !important;
  }
}

.burger-line {
  width: 100%;
  height: 2px;
  background: var(--color-text-primary);
  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(7px, -7px);
}

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

main {
  min-height: calc(100vh - var(--header-height) - 200px);
}

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

.section {
  padding: var(--space-3xl) 0;
}

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

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-cobalt), transparent);
}

/* ============================================
   HERO BANNER (FULL-WIDTH)
   ============================================ */

.hero-banner {
  width: 100vw;
  position: relative;
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-obsidian) 0%, rgba(46, 91, 255, 0.1) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

.hero-title {
  font-size: clamp(var(--font-size-3xl), 6vw, var(--font-size-5xl));
  margin-bottom: var(--space-lg);
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-cobalt));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: clamp(var(--font-size-base), 2vw, var(--font-size-lg));
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

.hero-image {
  width: 100%;
  height: auto;
  max-height: 50vh;
  object-fit: cover;
  opacity: 0.8;
  display: block;
}

/* ============================================
   GLASSMORPHISM CARDS
   ============================================ */

.glass-card {
  background: var(--color-glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
}

.glass-card:hover {
  border-color: var(--color-cobalt);
  box-shadow: var(--shadow-glow);
  transform: translateY(-5px);
}

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

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

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

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

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 1px solid transparent;
  margin-top: 10px;
}

.btn-primary {
  background: var(--color-cobalt);
  color: var(--color-text-primary);
  border-color: var(--color-cobalt);
}

.btn-primary:hover {
  background: transparent;
  color: var(--color-cobalt);
  border-color: var(--color-cobalt);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-glass-border);
}

.btn-secondary:hover {
  background: var(--color-glass-bg);
  border-color: var(--color-cobalt);
  color: var(--color-cobalt);
}

/* ============================================
   FORMS
   ============================================ */

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

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

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  background: var(--color-glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-cobalt);
  box-shadow: 0 0 0 3px rgba(46, 91, 255, 0.1);
}

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

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

.checkbox-input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  cursor: pointer;
  accent-color: var(--color-cobalt);
}

.checkbox-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
}

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

.product-card {
  background: var(--color-glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  overflow: hidden;
}

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

.product-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  opacity: 0.9;
}

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

.product-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.product-price {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  color: var(--color-bio-green);
  font-weight: 700;
}

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

.map-container {
  width: 100%;
  height: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-glass-border);
  margin: var(--space-xl) 0;
}

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

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

.site-footer {
  background: var(--color-glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--color-glass-border);
  padding: var(--space-xl) 0;
  margin-top: var(--space-3xl);
}

.footer-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.footer-menu {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  list-style: none;
  justify-content: center;
}

.footer-link {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color var(--transition-base);
}

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

.footer-info {
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

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

.privacy-popup {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  max-width: 400px;
  background: var(--color-glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  z-index: 2000;
  box-shadow: var(--shadow-lg);
  display: none;
}

.privacy-popup.active {
  display: block;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    transform: translateY(100px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.privacy-popup-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

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

/* ============================================
   ERROR PAGE (404)
   ============================================ */

.error-container {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
}

.error-code {
  font-family: var(--font-heading);
  font-size: clamp(4rem, 10vw, 8rem);
  color: var(--color-cobalt);
  margin-bottom: var(--space-lg);
  text-shadow: 0 0 30px rgba(46, 91, 255, 0.5);
}

.error-message {
  font-size: clamp(var(--font-size-lg), 3vw, var(--font-size-2xl));
  margin-bottom: var(--space-xl);
}

/* ============================================
   THANK YOU PAGE
   ============================================ */

.thank-you-container {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
}

.thank-you-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-lg);
  color: var(--color-bio-green);
}

.thank-you-icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--color-bio-green);
  filter: drop-shadow(0 0 10px rgba(57, 255, 20, 0.5));
}

.thank-you-title {
  font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
  margin-bottom: var(--space-md);
}

.thank-you-message {
  font-size: clamp(var(--font-size-base), 2vw, var(--font-size-lg));
  color: var(--color-text-secondary);
  max-width: 600px;
  margin-bottom: var(--space-xl);
}

/* ============================================
   CONTACT INFO
   ============================================ */

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  margin: var(--space-xl) 0;
}

.contact-item {
  background: var(--color-glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  transition: all var(--transition-base);
}

.contact-item:hover {
  border-color: var(--color-cobalt);
  box-shadow: var(--shadow-glow);
}

.contact-label {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.contact-value {
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
}

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

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

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

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

.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 {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-obsidian);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-left: 1px solid var(--color-glass-border);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-3xl) var(--space-xl);
    gap: var(--space-lg);
    transition: right var(--transition-base);
    z-index: 1000;
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-link {
    font-size: var(--font-size-base);
    width: 100%;
    padding: var(--space-md) 0;
  }

  .burger-toggle {
    display: flex !important;
  }

  .grid-two,
  .grid-three,
  .grid-four {
    grid-template-columns: 1fr;
  }

  .privacy-popup {
    right: var(--space-md);
    bottom: var(--space-md);
    max-width: calc(100% - 2rem);
  }
}

@media (max-width: 768px) {
  :root {
    --space-3xl: 3rem;
    --space-2xl: 2rem;
  }

  .section {
    padding: var(--space-2xl) 0;
  }

  .hero-content {
    padding: var(--space-xl) var(--space-md);
  }

  .glass-card {
    padding: var(--space-lg);
  }

  .contact-info {
    grid-template-columns: 1fr;
  }

  .footer-menu {
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
  }
}

@media (max-width: 480px) {


  .brand-name {
    font-size: 0.8rem;
  }

  .container {
    padding: 0 var(--space-md);
  }

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

@media (max-width: 320px) {
  .burger-toggle {
    display: flex !important;
  }

  .hero-banner {
    min-height: 40vh;
  }

  .btn {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-xs);
  }
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

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