/* ============================================
   BIO-RADAR THEME - FUTURISTIC BIRDWATCHING
   ============================================ */

:root {
  /* Color Palette */
  --color-canopy: #080C08;
  --color-signal: #00FFA3;
  --color-atmosphere: #F0F4F8;
  --color-dark: #0A0F0A;
  --color-mid: #1A2A1A;
  --color-light: #E8F0E8;
  
  /* Typography */
  --font-heading: 'Exo 2', sans-serif;
  --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;
  --radius-full: 50%;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 255, 163, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 255, 163, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 255, 163, 0.3);
  --shadow-glow: 0 0 20px rgba(0, 255, 163, 0.5);
  
  /* 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
   ============================================ */

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

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-atmosphere);
  background-color: var(--color-canopy);
  overflow-x: hidden;
  position: relative;
}

/* Long-Exposure Scroll Effect Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 30%, rgba(0, 255, 163, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(0, 255, 163, 0.02) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--color-atmosphere);
  margin-bottom: var(--space-md);
}

h1 {
  font-size: clamp(2rem, 5vw, 4rem);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 3rem);
}

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

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

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

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

/* ============================================
   HEADER - ПЕРЕПИСАНО С НУЛЯ
   ============================================ */

.site-header {
  position: relative;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: rgba(8, 12, 8, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 255, 163, 0.1);
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: nowrap;
}

.brand-text {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 2vw, 1.35rem);
  font-weight: 700;
  color: var(--color-signal);
  text-shadow: 0 0 10px rgba(0, 255, 163, 0.5);
  flex-shrink: 0;
}

.desktop-nav {
  display: flex;
  flex: 1;
  justify-content: center;
}

.main-nav {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-sm) var(--space-md);
  position: relative;
  color: var(--color-atmosphere);
  text-decoration: none;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--color-signal);
  transition: width var(--transition-base);
}

.main-nav a:hover::after {
  width: 80%;
}

.main-nav a:hover {
  color: var(--color-signal);
}

/* Бургер-кнопка - всегда в хедере */
.burger-btn {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 2px solid var(--color-signal);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: var(--space-sm);
  transition: all var(--transition-base);
  flex-shrink: 0;
  z-index: 10002;
  position: relative;
}

.burger-btn:hover {
  border-color: var(--color-atmosphere);
  box-shadow: var(--shadow-glow);
}

.burger-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-signal);
  transition: all var(--transition-base);
  border-radius: 2px;
}

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

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

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

/* Overlay для мобильного меню */
.menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  z-index: 9999;
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.menu-overlay.active {
  display: block;
  opacity: 1;
  pointer-events: auto;
}

/* Мобильное меню - отдельно от хедера */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 80%;
  max-width: 400px;
  height: 100vh;
  background: rgba(8, 12, 8, 0.98);
  backdrop-filter: blur(20px);
  z-index: 10001;
  transform: translateX(-100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
  padding: calc(var(--header-height) + var(--space-xl)) var(--space-lg) var(--space-xl);
  box-shadow: 2px 0 20px rgba(0, 0, 0, 0.5);
  pointer-events: none;
  visibility: hidden;
}

.mobile-menu.active {
  transform: translateX(0);
  pointer-events: auto;
  visibility: visible;
}

.mobile-menu-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.mobile-menu-list li {
  margin: 0;
  padding: 0;
}

.mobile-menu-list a {
  display: block;
  padding: var(--space-lg) var(--space-md);
  color: var(--color-atmosphere);
  text-decoration: none;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid rgba(0, 255, 163, 0.1);
  transition: all var(--transition-base);
}

.mobile-menu-list a:hover {
  color: var(--color-signal);
  background: rgba(0, 255, 163, 0.05);
  padding-left: var(--space-xl);
}

/* Мобильная версия */
@media (max-width: 1023px) {
  .burger-btn {
    display: flex !important;
  }
  
  .desktop-nav {
    display: none !important;
  }
  
  .site-header {
    justify-content: space-between;
  }
}

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

main {
  position: relative;
  z-index: 1;
}

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

.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%);
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(8, 12, 8, 0.9) 0%,
    rgba(8, 12, 8, 0.8) 50%,
    rgba(8, 12, 8, 0.9) 100%
  );
  z-index: 2;
}

.hero-banner img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  padding: var(--space-xl);
  max-width: 900px;
  margin: 0 auto;
}

.hero-content h1 {
  margin-bottom: var(--space-lg);
  text-shadow: 0 0 30px rgba(0, 255, 163, 0.8);
}

.hero-content p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  margin-bottom: var(--space-xl);
  color: var(--color-light);
}

/* Targeting Reticle Effect */
.targeting-reticle {
  position: absolute;
  width: 100px;
  height: 100px;
  border: 2px solid var(--color-signal);
  border-radius: var(--radius-full);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-base);
  box-shadow: 
    0 0 20px rgba(0, 255, 163, 0.6),
    inset 0 0 20px rgba(0, 255, 163, 0.2);
  z-index: 10;
}

.targeting-reticle.active {
  opacity: 1;
}

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

.content-section {
  padding: var(--space-xxl) var(--space-lg);
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-xxl);
  width: 100%;
  max-width: 900px;
}

.section-header h2 {
  position: relative;
  display: inline-block;
  padding-bottom: var(--space-md);
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: var(--color-signal);
  box-shadow: 0 0 10px rgba(0, 255, 163, 0.6);
}

/* Grid Layouts */
.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.grid-item {
  background: rgba(26, 42, 26, 0.5);
  border: 1px solid rgba(0, 255, 163, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  text-align: center;
}

.grid-item:hover {
  border-color: var(--color-signal);
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
}

/* Image Containers */
.image-container {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  max-height: 300px;
}

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

/* Binocular Viewport Hover Effect */
.image-container::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: var(--radius-full);
  background: radial-gradient(
    circle,
    rgba(0, 255, 163, 0.1) 0%,
    transparent 70%
  );
  pointer-events: none;
  opacity: 0;
  transform: scale(0);
  transition: all var(--transition-base);
  z-index: 2;
  mix-blend-mode: screen;
}

.image-container:hover::before {
  opacity: 1;
  transform: scale(1);
}

.image-container:hover img {
  transform: scale(1.1);
  filter: brightness(1.2) saturate(1.3);
}

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

.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  background: transparent;
  border: 2px solid var(--color-signal);
  color: var(--color-signal);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all var(--transition-base);
  border-radius: var(--radius-sm);
  text-align: center;
  margin-top: 10px;
}

.btn:hover {
  background: var(--color-signal);
  color: var(--color-canopy);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

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

.btn-primary:hover {
  background: var(--color-atmosphere);
  color: black;
  border-color: var(--color-atmosphere);
}

/* Scan Button for Avian Spectrometer */
.scan-btn {
  position: absolute;
  bottom: 10px;
  right: 10px;
  z-index: 4;
  overflow: hidden;
}

.scan-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(0, 255, 163, 0.3),
    transparent
  );
  transition: left 0.5s ease;
}

.scan-btn:hover::before {
  left: 100%;
}

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

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

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  color: var(--color-atmosphere);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-md);
  background: rgba(26, 42, 26, 0.5);
  border: 1px solid rgba(0, 255, 163, 0.3);
  border-radius: var(--radius-sm);
  color: var(--color-atmosphere);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-signal);
  box-shadow: 0 0 10px rgba(0, 255, 163, 0.3);
}

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

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

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

.checkbox-group label {
  margin-bottom: 0;
  font-size: 0.85rem;
  text-transform: none;
  cursor: pointer;
}

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

.product-card {
  background: rgba(26, 42, 26, 0.5);
  border: 1px solid rgba(0, 255, 163, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.product-card:hover {
  border-color: var(--color-signal);
  box-shadow: var(--shadow-md);
}

.product-price {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-signal);
  margin: var(--space-md) 0;
  font-weight: 700;
}

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

.map-container {
  width: 100%;
  height: 400px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(0, 255, 163, 0.2);
  margin-top: var(--space-lg);
}

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

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

.site-footer {
  background: rgba(8, 12, 8, 0.95);
  border-top: 1px solid rgba(0, 255, 163, 0.1);
  padding: var(--space-xl) var(--space-lg);
  margin-top: var(--space-xxl);
}

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

.footer-section h3 {
  font-size: 1rem;
  margin-bottom: var(--space-md);
  color: var(--color-signal);
}

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

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

.footer-nav a {
  font-size: 0.9rem;
  color: var(--color-light);
}

.footer-nav a:hover {
  color: var(--color-signal);
}

.footer-bottom {
  text-align: center;
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(0, 255, 163, 0.1);
  color: var(--color-light);
  font-size: 0.85rem;
}

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

.privacy-popup {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  background: rgba(8, 12, 8, 0.98);
  border: 2px solid var(--color-signal);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  max-width: 400px;
  z-index: 10000;
  box-shadow: var(--shadow-lg);
  display: none;
}

.privacy-popup.active {
  display: block;
}

.privacy-popup p {
  margin-bottom: var(--space-md);
  font-size: 0.9rem;
}

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

.privacy-popup-buttons .btn {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.85rem;
}

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

/* Lens Flare Effect */
.lens-flare {
  position: absolute;
  width: 200px;
  height: 200px;
  background: radial-gradient(
    ellipse at center,
    rgba(0, 255, 163, 0.1) 0%,
    transparent 70%
  );
  pointer-events: none;
  filter: blur(40px);
  opacity: 0;
  transition: opacity var(--transition-slow);
}

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

@media (max-width: 768px) {
  :root {
    --space-xl: 2rem;
    --space-xxl: 3rem;
  }
  
  .content-section {
    padding: var(--space-xl) var(--space-md);
  }
  
  .grid-container {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    max-width: 100%;
  }
  
  .hero-banner {
    min-height: 50vh;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .privacy-popup {
    bottom: var(--space-md);
    right: var(--space-md);
    left: var(--space-md);
    max-width: none;
  }
  
  .image-container {
    max-height: 250px;
  }
}

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

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes scan-line {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

.scan-animation {
  position: relative;
  overflow: hidden;
}

.scan-animation::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 4px;
  height: 100%;
  background: linear-gradient(
    to bottom,
    transparent,
    var(--color-signal),
    transparent
  );
  animation: scan-line 2s ease-in-out;
  box-shadow: 0 0 20px var(--color-signal);
}

/* ============================================
   SPECIAL FEATURES
   ============================================ */

/* Avian Spectrometer Data Display */
.spectrometer-data {
  display: none;
  position: absolute;
  bottom: var(--space-md);
  left: var(--space-md);
  background: rgba(8, 12, 8, 0.95);
  border: 1px solid var(--color-signal);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  font-size: 0.85rem;
  z-index: 5;
}

.spectrometer-data.active {
  display: block;
  animation: pulse 2s infinite;
}

.spectrometer-data-item {
  margin-bottom: var(--space-xs);
  color: var(--color-signal);
  font-family: var(--font-heading);
}

/* Citizen Scientist Profile */
.profile-card {
  background: rgba(26, 42, 26, 0.5);
  border: 1px solid rgba(0, 255, 163, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  text-align: center;
}

.rank-display {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--color-signal);
  margin: var(--space-md) 0;
  text-shadow: 0 0 20px rgba(0, 255, 163, 0.6);
}

/* Frequency Visualization */
.frequency-visual {
  width: 100%;
  height: 200px;
  background: rgba(26, 42, 26, 0.5);
  border: 1px solid rgba(0, 255, 163, 0.2);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
}

.frequency-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background: linear-gradient(
    to top,
    var(--color-signal) 0%,
    transparent 100%
  );
  opacity: 0.6;
  animation: wave 3s ease-in-out infinite;
}

@keyframes wave {
  0%, 100% {
    transform: scaleY(1);
  }
  50% {
    transform: scaleY(1.5);
  }
}