/* ===== CSS VARIABLES ===== */
:root {
  --color-echo-absorb: #1B1B1E;
  --color-resonance: #00FFC2;
  --color-foam-white: #F8F9FA;
  --color-sub-bass: #310A5D;
  --font-primary: 'Lexend', sans-serif;
  --font-mono: 'Space Grotesk', monospace;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-xxl: 4rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 999px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --shadow-sm: 0 2px 8px rgba(0, 255, 194, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 255, 194, 0.15);
  --shadow-lg: 0 8px 32px rgba(0, 255, 194, 0.2);
}

/* ===== RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--color-echo-absorb);
  color: var(--color-foam-white);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--color-foam-white);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
  margin-bottom: var(--space-md);
  color: rgba(248, 249, 250, 0.85);
}

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

a:hover {
  color: #00CC99;
}

/* ===== HEADER ===== */
.site-header {
  position: relative;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: rgba(27, 27, 30, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 255, 194, 0.1);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.brand-name {
  font-size: clamp(1rem, 2vw, 1.35rem);
  font-weight: 600;
  color: var(--color-resonance);
  flex-shrink: 0;
}

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

.main-nav a {
  color: var(--color-foam-white);
  font-size: 0.95rem;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.main-nav a:hover {
  background: rgba(0, 255, 194, 0.1);
  color: var(--color-resonance);
}

.burger-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-resonance);
  color: var(--color-resonance);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 1.25rem;
  transition: all var(--transition-fast);
  order: 999;
  z-index: 100001;
}

.burger-toggle:hover {
  background: rgba(0, 255, 194, 0.1);
}

.burger-toggle.active {
  background: var(--color-resonance);
  color: var(--color-echo-absorb);
}

.burger-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100vh;
  background: rgba(27, 27, 30, 0.98);
  backdrop-filter: blur(20px);
  padding: var(--space-xl);
  padding-top: 100px;
  padding-bottom: var(--space-xl);
  flex-direction: column;
  gap: var(--space-sm);
  list-style: none;
  z-index: 100000;
  overflow-y: auto;
  overflow-x: hidden;
  box-sizing: border-box;
}

.burger-menu.active {
  display: flex;
}

.burger-menu li {
  width: 100%;
  display: block;
}

.burger-menu a {
  display: block;
  width: 100%;
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  border-bottom: 1px solid rgba(0, 255, 194, 0.1);
  color: var(--color-foam-white);
  font-size: 1.1rem;
  text-align: left;
  box-sizing: border-box;
  min-height: 50px;
  line-height: 1.5;
}

.burger-menu a:hover {
  background: rgba(0, 255, 194, 0.15);
  padding-left: calc(var(--space-lg) + var(--space-md));
  color: var(--color-resonance);
}

/* ===== MAIN CONTENT ===== */
main {
  flex: 1;
  width: 100%;
}

/* ===== FULL-WIDTH BANNER ===== */
.hero-banner {
  width: 100vw;
  position: relative;
  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;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(49, 10, 93, 0.8), rgba(27, 27, 30, 0.9));
  z-index: 1;
}

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

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  width: 100%;
  padding: var(--space-xl);
  text-align: center;
}

.hero-content h1 {
  margin-bottom: var(--space-lg);
  text-shadow: 0 4px 20px rgba(0, 255, 194, 0.3);
}

.hero-content p {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  max-width: 800px;
  margin: 0 auto var(--space-xl);
  opacity: 0.9;
}

/* ===== SECTIONS ===== */
.content-section {
  padding: var(--space-xxl) var(--space-lg);
  max-width: 1200px;
  margin: 0 auto;
}

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

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-resonance), transparent);
}

/* ===== GRID LAYOUTS ===== */
.grid-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
  justify-items: center;
}

.grid-item {
  background: rgba(49, 10, 93, 0.3);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 255, 194, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  max-width: 400px;
  width: 100%;
  text-align: left;
}

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

.grid-item-image {
  width: 100%;
  max-width: 400px;
  height: 250px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  margin-left: auto;
  margin-right: auto;
  display: block;
}

.grid-item h3 {
  color: var(--color-resonance);
  margin-bottom: var(--space-sm);
}

.grid-item p {
  flex: 1;
  font-size: 0.95rem;
}

/* ===== TWO COLUMN LAYOUT ===== */
.two-column {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  align-items: center;
  margin-top: var(--space-xl);
}

.two-column-image {
  width: 100%;
  max-width: 600px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  margin: 0 auto;
  display: block;
}

.two-column-content {
  padding: var(--space-md);
  text-align: left;
}

.two-column-content.text-center {
  text-align: center;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  background: transparent;
  border: 2px solid var(--color-resonance);
  color: var(--color-resonance);
  border-radius: var(--radius-pill);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
  margin-top: 10px;
}

.btn:hover {
  background: var(--color-resonance);
  color: var(--color-echo-absorb);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-primary {
  background: var(--color-resonance);
  color: var(--color-echo-absorb);
}

.btn-primary:hover {
  background: #00CC99;
  border-color: #00CC99;
  color: var(--color-echo-absorb);
}

/* ===== FORM STYLES ===== */
.form-container {
  max-width: 600px;
  margin: 0 auto;
  background: rgba(49, 10, 93, 0.3);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 255, 194, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-top: var(--space-xl);
}

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

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  color: var(--color-resonance);
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-md);
  background: rgba(27, 27, 30, 0.6);
  border: 1px solid rgba(0, 255, 194, 0.2);
  border-radius: var(--radius-md);
  color: var(--color-foam-white);
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-resonance);
  box-shadow: 0 0 0 3px rgba(0, 255, 194, 0.1);
}

.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: 0.25rem;
  cursor: pointer;
}

.checkbox-group label {
  margin-bottom: 0;
  font-weight: 400;
  color: var(--color-foam-white);
  cursor: pointer;
}

/* ===== PRODUCTS GRID ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
  justify-items: center;
}

.product-card {
  background: rgba(49, 10, 93, 0.3);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 255, 194, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  max-width: 400px;
  width: 100%;
  text-align: left;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-resonance);
  box-shadow: var(--shadow-md);
}

.product-image {
  width: 100%;
  max-width: 350px;
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  margin-left: auto;
  margin-right: auto;
  display: block;
}

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

.product-description {
  flex: 1;
  margin-bottom: var(--space-md);
  font-size: 0.95rem;
}

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

/* ===== MAP CONTAINER ===== */
.map-container {
  width: 100%;
  height: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: var(--space-xl);
  border: 1px solid rgba(0, 255, 194, 0.1);
}

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

/* ===== SPECTRUM ANALYZER (FOOTER ELEMENT) ===== */
.spectrum-analyzer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, 
    transparent 0%,
    var(--color-resonance) 20%,
    var(--color-resonance) 40%,
    transparent 60%,
    transparent 100%
  );
  opacity: 0.3;
  z-index: 100;
  animation: spectrum-pulse 3s ease-in-out infinite;
}

@keyframes spectrum-pulse {
  0%, 100% {
    opacity: 0.2;
    transform: scaleX(0.8);
  }
  50% {
    opacity: 0.4;
    transform: scaleX(1);
  }
}

/* ===== FOOTER ===== */
.site-footer {
  background: rgba(27, 27, 30, 0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(0, 255, 194, 0.1);
  padding: var(--space-xl) var(--space-lg);
  margin-top: var(--space-xxl);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
}

.footer-section h4 {
  color: var(--color-resonance);
  margin-bottom: var(--space-md);
  font-size: 1rem;
}

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

.footer-nav a {
  color: rgba(248, 249, 250, 0.7);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--color-resonance);
  padding-left: var(--space-sm);
}

.footer-contact {
  color: rgba(248, 249, 250, 0.7);
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  margin-top: var(--space-lg);
  border-top: 1px solid rgba(0, 255, 194, 0.1);
  color: rgba(248, 249, 250, 0.5);
  font-size: 0.85rem;
}

/* ===== PRIVACY POPUP ===== */
.privacy-popup {
  position: fixed;
  bottom: var(--space-lg);
  left: var(--space-lg);
  right: var(--space-lg);
  max-width: 500px;
  background: rgba(49, 10, 93, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-resonance);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  z-index: 10000;
  box-shadow: var(--shadow-lg);
  display: none;
}

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

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

.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: 0.9rem;
}

/* ===== 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); }

.glass-effect {
  background: rgba(49, 10, 93, 0.3);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 255, 194, 0.1);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1023px) {
  .main-nav {
    display: none;
  }
  
  .burger-toggle {
    display: block;
  }
  
  .hero-banner {
    min-height: 60vh;
  }
  
  .content-section {
    padding: var(--space-xl) var(--space-md);
  }
  
  .grid-layout,
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .two-column {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: var(--space-md);
  }
  
  .hero-content {
    padding: var(--space-lg);
  }
  
  .content-section {
    padding: var(--space-lg) var(--space-md);
  }
  
  .form-container {
    padding: var(--space-lg);
  }
  
  .privacy-popup {
    left: var(--space-md);
    right: var(--space-md);
    bottom: var(--space-md);
  }
  
  .burger-menu {
    padding: var(--space-lg);
    padding-top: 90px;
    padding-bottom: var(--space-lg);
  }
  
  .burger-menu a {
    padding: var(--space-md) var(--space-lg);
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .hero-banner {
    min-height: 50vh;
  }
  
  .btn {
    width: 100%;
    padding: var(--space-md);
  }
  
  .privacy-popup-buttons {
    flex-direction: column;
  }
  
  .burger-menu {
    padding: var(--space-md);
    padding-top: 80px;
    padding-bottom: var(--space-md);
  }
  
  .burger-menu a {
    padding: var(--space-md);
    font-size: 0.95rem;
    min-height: 45px;
  }
}

@media (max-width: 320px) {
  html {
    font-size: 12px;
  }
  
  .site-header {
    padding: var(--space-sm);
  }
  
  .content-section {
    padding: var(--space-md) var(--space-sm);
  }
}

/* ===== FREQUENCY SLIDER STYLES ===== */
.frequency-slider {
  width: 100%;
  height: 8px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, 
    rgba(0, 255, 194, 0.3) 0%,
    rgba(0, 255, 194, 0.5) 50%,
    rgba(0, 255, 194, 0.3) 100%
  );
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
  margin: var(--space-md) 0;
}

.frequency-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-resonance);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(0, 255, 194, 0.5);
  transition: all var(--transition-fast);
}

.frequency-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 15px rgba(0, 255, 194, 0.8);
}

.frequency-slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-resonance);
  cursor: pointer;
  border: none;
  box-shadow: 0 0 10px rgba(0, 255, 194, 0.5);
  transition: all var(--transition-fast);
}

.frequency-slider::-moz-range-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 15px rgba(0, 255, 194, 0.8);
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-sm);
  font-size: 0.9rem;
  color: rgba(248, 249, 250, 0.7);
}

.slider-description {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: rgba(49, 10, 93, 0.3);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-resonance);
  font-size: 0.95rem;
  line-height: 1.6;
}