:root {
    --primary: #6200ea;
    --primary-dark: #3700b3;
    --primary-light: #bb86fc;
    --secondary: #03dac6;
    --dark: #121212;
    --dark-surface: #1e1e1e;
    --gray: #b0b0b0;
    --light: #f5f5f5;
    --text-on-dark: #ffffff;
    --text-on-light: #121212;
    --error: #cf6679;
    --success: #00c853;
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    color: var(--text-on-light);
    line-height: 1.6;
    background-color: var(--light);
  }

  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
  }

  h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.5em;
  }

  h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.02em;
  }

  h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: -0.01em;
  }

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

  p {
    margin-bottom: 1rem;
  }

  a {
    color: var(--primary);
    text-decoration: none;
    transition: all 0.3s ease;
  }

  a:hover {
    color: var(--primary-dark);
  }

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

  .bg-image {
    position: absolute;
    z-index: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.15;
    top: 0;
    left: 0;
  }

  section {
    padding: 5rem 1.5rem;
    position: relative;
    overflow: hidden;
  }

  .btn-primary, .btn-secondary, .btn-outline {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-align: center;
    font-size: 1rem;
  }

  .btn-primary {
    background-color: var(--primary);
    color: var(--text-on-dark);
    box-shadow: 0 4px 20px rgba(98, 0, 234, 0.3);
  }

  .btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: 0 6px 25px rgba(98, 0, 234, 0.4);
    transform: translateY(-2px);
    color: var(--text-on-dark);
  }

  .btn-secondary {
    background-color: var(--secondary);
    color: var(--text-on-light);
    box-shadow: 0 4px 20px rgba(3, 218, 198, 0.3);
  }

  .btn-secondary:hover {
    box-shadow: 0 6px 25px rgba(3, 218, 198, 0.4);
    transform: translateY(-2px);
    color: var(--text-on-light);
  }

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

  .btn-outline:hover {
    background-color: var(--primary);
    color: var(--text-on-dark);
    transform: translateY(-2px);
  }

  /* Hero Section */
  .hero {
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background-color: var(--dark);
    color: var(--text-on-dark);
    padding: 2rem;
    position: relative;
  }

  .hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin-bottom: 3rem;
  }

  .hero p {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-product {
    width: 80%;
    max-width: 500px;
    border-radius: 20px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.25);
    transform: perspective(1000px) rotateX(10deg);
    position: relative;
    z-index: 1;
  }

  /* Featured Tech Section */
  .featured-tech {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    background-color: var(--light);
  }

  .tech-features {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 3rem;
  }

  .feature {
    padding: 1.5rem;
    background: linear-gradient(145deg, #ffffff, #f0f0f0);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
  }

  .feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
  }

  .feature i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1rem;
  }

  /* Collection Showcase */
  .collection-showcase {
    background-color: var(--dark-surface);
    color: var(--text-on-dark);
    text-align: center;
  }

  .collection-showcase h2 {
    margin-bottom: 3rem;
    position: relative;
    z-index: 1;
  }

  .collection-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    position: relative;
    z-index: 1;
  }

  .collection-item {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
    padding-bottom: 2rem;
  }

  .collection-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  }

  .collection-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 20px 20px 0 0;
    transition: all 0.5s ease;
  }

  .collection-item:hover img {
    transform: scale(1.05);
  }

  .collection-item h3 {
    margin-top: 1.5rem;
  }

  .collection-item p {
    padding: 0 1.5rem;
    margin-bottom: 1.5rem;
  }

  /* Sound Experience */
  .sound-experience {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    background-color: var(--light);
  }

  .experience-list {
    list-style: none;
    margin: 2rem 0;
  }

  .experience-list li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
  }

  .experience-list i {
    color: var(--success);
    margin-right: 1rem;
    font-size: 1.2rem;
  }

  .sound-visual {
    position: relative;
    height: 400px;
  }

  .wave-image {
    position: absolute;
    width: 80%;
    height: 80%;
    object-fit: cover;
    border-radius: 20px;
    top: 0;
    left: 0;
    z-index: 1;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
  }

  .experience-image {
    position: absolute;
    width: 60%;
    height: 60%;
    object-fit: cover;
    border-radius: 20px;
    bottom: 0;
    right: 0;
    z-index: 2;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
  }

  /* Testimonials */
  .testimonials {
    background-color: var(--dark-surface);
    color: var(--text-on-dark);
    text-align: center;
  }

  .testimonials h2 {
    margin-bottom: 3rem;
  }

  .testimonial-slider {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
  }

  .testimonial {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
  }

  .quote {
    position: relative;
    padding: 1rem 2rem;
  }

  .quote i {
    color: var(--primary-light);
    font-size: 1.5rem;
    opacity: 0.5;
    position: absolute;
  }

  .quote i.fa-quote-left {
    top: 0;
    left: 0;
  }

  .quote i.fa-quote-right {
    bottom: 0;
    right: 0;
  }

  .quote p {
    font-size: 1.2rem;
    line-height: 1.8;
  }

  .author {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1.5rem;
  }

  .author img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 1rem;
  }

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

  .author-info h3 {
    margin-bottom: 0.2rem;
    font-size: 1.1rem;
  }

  .author-info p {
    margin: 0;
    color: var(--gray);
    font-size: 0.9rem;
  }

  .slider-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
  }

  .slider-controls button {
    background-color: transparent;
    border: 2px solid var(--primary-light);
    color: var(--primary-light);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
  }

  .slider-controls button:hover {
    background-color: var(--primary-light);
    color: var(--dark);
  }

  /* Newsletter */
  .newsletter {
    background-color: var(--dark);
    color: var(--text-on-dark);
    text-align: center;
    position: relative;
  }

  .newsletter-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
  }

  .newsletter p {
    margin-bottom: 2rem;
  }

  label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
  }

  input {
    width: 100%;
    padding: 1rem;
    border: none;
    border-radius: 10px;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-on-dark);
    font-size: 1rem;
  }

  input:focus {
    outline: 2px solid var(--primary-light);
    background-color: rgba(255, 255, 255, 0.15);
  }

  .form-info {
    font-size: 0.9rem;
    opacity: 0.7;
  }

  /* Media Queries */
  @media (min-width: 768px) {
    section {
      padding: 6rem 3rem;
    }

    .tech-features {
      grid-template-columns: repeat(3, 1fr);
    }

    .collection-grid {
      grid-template-columns: repeat(3, 1fr);
    }

    button[type="submit"] {
      align-self: flex-end;
    }
  }

  @media (min-width: 1024px) {
    .featured-tech {
      grid-template-columns: 1fr 1fr;
      align-items: center;
    }

    .sound-experience {
      grid-template-columns: 1fr 1fr;
      align-items: center;
    }

    .hero-product {
      width: 60%;
    }
  }