:root {
    --bg-color: #0f0f13;
    --surface-color: #1c1c24;
    --text-main: #f2f2f5;
    --text-muted: #9fa0b0;
    --accent-color: #ff3b5c;
    --accent-hover: #e62e4d;
    --border-color: #2b2b36;
    --radius: 12px;
  }

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

  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
  }

  a {
    text-decoration: none;
    color: inherit;
  }

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

  /* Header */
  .site-header {
    position: sticky;
    top: 0;
    background-color: rgba(15, 15, 19, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
  }

  .header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .logo-box {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: bold;
    color: #fff;
  }

  .logo-box img {
    height: 32px;
    width: 32px;
    border-radius: 8px;
    object-fit: cover;
  }

  .nav-links {
    display: none;
  }

  .nav-links a {
    margin-left: 24px;
    font-size: 15px;
    color: var(--text-muted);
    transition: color 0.3s;
  }

  .nav-links a:hover {
    color: #fff;
  }

  .download-btn {
    background: linear-gradient(135deg, var(--accent-color), #ff6b4a);
    color: #fff;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 14px;
    display: inline-block;
    transition: transform 0.2s, box-shadow 0.2s;
  }

  .download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 59, 92, 0.4);
  }

  /* Hero Section */
  .hero {
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 30px;
  }

  .hero-content h1 {
    font-size: 32px;
    line-height: 1.3;
    margin-bottom: 16px;
  }

  .hero-content h1 span {
    color: var(--accent-color);
  }

  .hero-content p {
    color: var(--text-muted);
    font-size: 16px;
    margin-bottom: 24px;
  }

  .hero-covers {
    display: flex;
    gap: 15px;
    overflow-x: auto;
    padding-bottom: 10px;
    scrollbar-width: none;
  }

  .hero-covers::-webkit-scrollbar {
    display: none;
  }

  .hero-covers img {
    width: 160px;
    height: 240px;
    object-fit: cover;
    border-radius: var(--radius);
    box-shadow: 0 8px 16px rgba(0,0,0,0.4);
    flex-shrink: 0;
  }

  /* Sections General */
  section {
    padding: 60px 20px;
  }

  .section-inner {
    max-width: 1200px;
    margin: 0 auto;
  }

  .section-title {
    font-size: 24px;
    margin-bottom: 24px;
    text-align: center;
  }

  .section-subtitle {
    font-size: 16px;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  /* Feature Grid */
  .feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .feature-card {
    background-color: var(--surface-color);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
  }

  .feature-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: #fff;
  }

  .feature-card p {
    color: var(--text-muted);
    font-size: 14px;
  }

  /* Magic / AI Section */
  .magic-section {
    background-color: #141419;
  }

  .magic-layout {
    display: flex;
    flex-direction: column;
    gap: 30px;
    align-items: center;
  }

  .magic-text h2 {
    font-size: 24px;
    margin-bottom: 16px;
  }

  .magic-text p {
    color: var(--text-muted);
    margin-bottom: 16px;
  }

  .magic-image {
    width: 100%;
    max-width: 400px;
    border-radius: var(--radius);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  }

  /* Gallery */
  .gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
  }

  .gallery-grid img {
    width: 100%;
    height: auto;
    aspect-ratio: 3/4;
    object-fit: cover;
    border-radius: var(--radius);
    transition: transform 0.3s;
  }

  .gallery-grid img:hover {
    transform: scale(1.02);
  }

  /* Steps */
  .steps-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .step-item {
    display: flex;
    gap: 16px;
    background: var(--surface-color);
    padding: 20px;
    border-radius: var(--radius);
  }

  .step-num {
    background: var(--accent-color);
    color: #fff;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
  }

  .step-content h3 {
    font-size: 18px;
    margin-bottom: 8px;
  }

  .step-content p {
    color: var(--text-muted);
    font-size: 14px;
  }

  /* CTA Bottom */
  .bottom-cta {
    text-align: center;
    background: linear-gradient(180deg, var(--bg-color) 0%, #1c1c24 100%);
  }

  .bottom-cta h2 {
    font-size: 28px;
    margin-bottom: 16px;
  }

  .bottom-cta p {
    color: var(--text-muted);
    margin-bottom: 32px;
  }

  .btn-large {
    font-size: 18px;
    padding: 14px 40px;
    border-radius: 28px;
  }

  /* Footer */
  .site-footer {
    border-top: 1px solid var(--border-color);
    padding: 30px 20px;
    text-align: center;
    font-size: 12px;
    color: #666;
  }

  .site-footer p {
    margin-bottom: 8px;
  }

  .site-footer a {
    color: #666;
    transition: color 0.2s;
  }

  .site-footer a:hover {
    color: #999;
  }

  /* Responsive */
  @media (min-width: 768px) {
    .nav-links {
      display: block;
    }

    .hero {
      flex-direction: row;
      align-items: center;
      padding: 80px 20px;
    }

    .hero-content {
      flex: 1;
    }

    .hero-content h1 {
      font-size: 42px;
    }

    .hero-covers {
      flex: 1;
      justify-content: flex-end;
      overflow-x: visible;
      flex-wrap: wrap;
    }

    .hero-covers img {
      width: 180px;
      height: 270px;
    }

    .feature-grid {
      grid-template-columns: repeat(2, 1fr);
    }

    .magic-layout {
      flex-direction: row;
      gap: 60px;
    }

    .magic-layout > * {
      flex: 1;
    }

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

    .steps-list {
      flex-direction: row;
    }

    .step-item {
      flex-direction: column;
      flex: 1;
      text-align: center;
    }

    .step-num {
      margin: 0 auto 16px;
    }
  }

  @media (min-width: 1024px) {
    .hero-covers img {
      width: 200px;
      height: 300px;
    }

    .feature-grid {
      grid-template-columns: repeat(4, 1fr);
    }

    .gallery-grid {
      grid-template-columns: repeat(5, 1fr);
    }

    .gallery-grid img:nth-child(6),
    .gallery-grid img:nth-child(7) {
      grid-column: span 2;
      aspect-ratio: 16/9;
    }
    
    .gallery-grid img:nth-child(8),
    .gallery-grid img:nth-child(9),
    .gallery-grid img:nth-child(10) {
      grid-column: span 1;
    }
  }