/* ============================================
   SONIC MINIMALIST DARK MODE DESIGN SYSTEM
   Music Lessons for Adults - Dark Studio Aesthetic
   ============================================ */

:root {
  /* Color Palette - Night Groove Theme */
  --color-bg-primary: #0F0F12;
  --color-bg-secondary: #1A1A1F;
  --color-bg-tertiary: #25252D;
  --color-primary: #7F5AF0;
  --color-secondary: #2CB67D;
  --color-accent: #FFFFFE;
  --color-text-primary: #FFFFFE;
  --color-text-secondary: #B8B8C0;
  --color-text-muted: #6B6B75;
  
  /* Typography */
  --font-primary: 'Montserrat', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing System */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(127, 90, 240, 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-primary);
  font-weight: var(--font-weight-regular);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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-secondary);
  font-size: clamp(1rem, 2vw, 1.125rem);
}

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

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

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

.site-header {
  position: relative;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: rgba(15, 15, 18, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(127, 90, 240, 0.1);
  z-index: 1000;
}

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

.brand-name {
  font-size: clamp(1rem, 2vw, 1.3rem);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

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

.nav-menu li a {
  color: var(--color-text-secondary);
  font-size: clamp(0.875rem, 2vw, 1rem);
  font-weight: var(--font-weight-medium);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-menu li a:hover {
  color: var(--color-primary);
  background: rgba(127, 90, 240, 0.1);
}

.burger-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.25rem;
  transition: all var(--transition-fast);
  z-index: 1001;
}

.burger-toggle:hover {
  background: rgba(127, 90, 240, 0.1);
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.burger-toggle.active {
  background: var(--color-primary);
  color: var(--color-text-primary);
}

/* Mobile Navigation */
@media (max-width: 1023px) {
  .burger-toggle {
    display: block;
  }
  
  .nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
  }
  
  .nav-overlay.active {
    opacity: 1;
    visibility: visible;
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    max-width: 85%;
    height: 100vh;
    background: var(--color-bg-secondary);
    flex-direction: column;
    padding: var(--space-xl) var(--space-lg);
    padding-top: 100px;
    gap: var(--space-md);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    overflow-y: auto;
  }
  
  .nav-menu.active {
    transform: translateX(0);
  }
  
  .nav-menu li {
    width: 100%;
  }
  
  .nav-menu li a {
    display: block;
    width: 100%;
    padding: var(--space-md);
    text-align: left;
    border-radius: var(--radius-md);
    font-size: 1.125rem;
  }
}

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

.hero-banner {
  position: relative;
  width: 100vw;
  min-height: 60vh;
  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(15, 15, 18, 0.85) 0%, rgba(127, 90, 240, 0.3) 100%);
  z-index: 2;
}

.hero-banner img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  opacity: 0.4;
}

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

.hero-content h1 {
  margin-bottom: var(--space-md);
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.hero-content p {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: var(--color-text-primary);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

/* ============================================
   MAIN CONTENT & SECTIONS
   ============================================ */

main {
  width: 100%;
  overflow-x: hidden;
}

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

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

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

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

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

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

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

.grid-container {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.grid-two {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.grid-three {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}

.grid-four {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.grid-item {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid rgba(127, 90, 240, 0.1);
  transition: all var(--transition-base);
}

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

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

.grid-two .grid-item img {
  height: 220px;
}

.grid-item-image-large {
  height: 250px;
}

.grid-item-image-small {
  height: 150px;
}

/* ============================================
   CARDS & FEATURES
   ============================================ */

.feature-card {
  text-align: center;
  padding: var(--space-lg);
}

.feature-icon {
  font-size: 2.5rem;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.feature-card h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.feature-card p {
  color: var(--color-text-secondary);
}

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

.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-primary);
  color: var(--color-text-primary);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
  margin-top: 10px;
  text-decoration: none;
}

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

.btn-secondary {
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

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

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

.form-container {
  max-width: 600px;
  margin: 0 auto;
  background: var(--color-bg-secondary);
  padding: var(--space-xl);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(127, 90, 240, 0.1);
}

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

.form-group label {
  display: block;
  margin-bottom: var(--space-xs);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
  font-size: 0.9375rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-primary);
  border: 1px solid rgba(127, 90, 240, 0.2);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  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-primary);
  box-shadow: 0 0 0 3px rgba(127, 90, 240, 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: 4px;
  cursor: pointer;
}

.checkbox-group label {
  margin-bottom: 0;
  font-weight: var(--font-weight-regular);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  cursor: pointer;
}

.required-asterisk {
  color: var(--color-primary);
}

.form-submit-container {
  text-align: center;
  margin-top: var(--space-lg);
}

.contact-hours,
.response-time {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-top: var(--space-sm);
}

.map-description {
  text-align: center;
  margin-top: var(--space-md);
  color: var(--color-text-secondary);
}

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

.product-card {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(127, 90, 240, 0.1);
  transition: all var(--transition-base);
}

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

.product-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

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

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

.product-price {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--color-secondary);
  font-weight: var(--font-weight-semibold);
  margin-top: var(--space-md);
}

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

.map-container {
  width: 100%;
  height: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: var(--space-lg);
  border: 1px solid rgba(127, 90, 240, 0.1);
}

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

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

.site-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid rgba(127, 90, 240, 0.1);
  padding: var(--space-xl) var(--space-lg);
  margin-top: var(--space-2xl);
}

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

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

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

.footer-menu li {
  margin-bottom: var(--space-xs);
}

.footer-menu a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

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

.footer-contact {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.8;
}

.footer-copyright {
  text-align: center;
  padding-top: var(--space-lg);
  margin-top: var(--space-lg);
  border-top: 1px solid rgba(127, 90, 240, 0.1);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

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

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

.text-mono {
  font-family: var(--font-mono);
}

.date {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.content-list {
  color: var(--color-text-secondary);
  line-height: 2;
  margin-left: var(--space-lg);
}

.content-text-secondary {
  color: var(--color-text-secondary);
}

.content-text-centered {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--space-xl);
  color: var(--color-text-secondary);
}

.content-text-centered-large {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--space-xl);
}

.button-spacing {
  margin-top: var(--space-lg);
}

.button-spacing-xl {
  margin-top: var(--space-xl);
}

.button-margin-left {
  margin-left: var(--space-md);
}

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

.section-spacing-top {
  margin-top: var(--space-lg);
}

.thank-you-container {
  min-height: 50vh;
}

.thank-you-icon {
  font-size: 4rem;
  color: var(--color-secondary);
  margin-bottom: var(--space-lg);
}

.thank-you-title {
  margin-bottom: var(--space-md);
}

.thank-you-text {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

.thank-you-text-small {
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-lg);
}

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

.privacy-popup {
  position: fixed;
  bottom: var(--space-lg);
  left: var(--space-lg);
  right: var(--space-lg);
  max-width: 500px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-lg);
  z-index: 10000;
  transform: translateY(150%);
  transition: transform var(--transition-base);
}

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

.privacy-popup p {
  margin-bottom: var(--space-md);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

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

.privacy-popup-buttons .btn {
  flex: 1;
  min-width: 120px;
  padding: var(--space-xs) var(--space-md);
  font-size: 0.875rem;
}

/* ============================================
   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-xl);
}

.error-code {
  font-size: clamp(4rem, 10vw, 8rem);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  font-family: var(--font-mono);
  margin-bottom: var(--space-md);
}

.error-message {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  margin-bottom: var(--space-lg);
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */

@media (max-width: 768px) {
  :root {
    --space-xl: 3rem;
    --space-2xl: 4rem;
  }
  
  .content-container {
    padding: var(--space-lg) var(--space-md);
  }
  
  .section {
    margin-bottom: var(--space-xl);
    padding: var(--space-lg) 0;
  }
  
  .grid-two,
  .grid-three,
  .grid-four {
    grid-template-columns: 1fr;
  }
  
  .form-container {
    padding: var(--space-lg);
  }
  
  .hero-banner {
    min-height: 50vh;
  }
  
  .privacy-popup {
    left: var(--space-md);
    right: var(--space-md);
    bottom: var(--space-md);
  }
}

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

@media (max-width: 320px) {
  html {
    font-size: 14px;
  }
  
  .content-container {
    padding: var(--space-sm);
  }
}

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

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

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

/* Subtle waveform effect for audio theme */
.audio-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    var(--color-primary) 25%, 
    var(--color-secondary) 50%, 
    var(--color-primary) 75%, 
    transparent 100%);
  opacity: 0.3;
  animation: waveMove 3s ease-in-out infinite;
}

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