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

    body {
      font-family: 'Inter', sans-serif;
      background: #1a1a1a;
      color: #e0e0e0;
      line-height: 1.6;
      overflow-x: hidden;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* Hero Section */
    .hero {
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      padding: 80px 20px;
      position: relative;
    }

    .hero-title {
      font-size: clamp(2.5rem, 6vw, 4rem);
      color: #d4ff00;
      margin-bottom: 1.5rem;
      font-weight: 700;
      line-height: 1.1;
      letter-spacing: -0.02em;
    }

    .hero-subtitle {
      font-size: clamp(1.1rem, 2.5vw, 1.4rem);
      color: #b0b0b0;
      max-width: 800px;
      margin: 0 auto 3rem;
      font-weight: 400;
      line-height: 1.6;
    }

    .btn-primary {
      background: #d4ff00;
      color: #1a1a1a;
      padding: 16px 48px;
      border: none;
      border-radius: 12px;
      font-size: 1.1rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s ease;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .btn-primary:hover {
      background: #e5ff33;
      transform: translateY(-2px);
      box-shadow: 0 10px 30px rgba(212, 255, 0, 0.3);
    }

    .btn-primary:disabled {
      background: #4a4a4a;
      color: #808080;
      cursor: not-allowed;
      transform: none;
    }

    .scroll-icon {
      margin-top: 2rem;
      font-size: 2rem;
      color: #d4ff00;
      animation: bounce 2s infinite;
    }

    @keyframes bounce {

      0%,
      100% {
        transform: translateY(0);
      }

      50% {
        transform: translateY(10px);
      }
    }

    /* Section Styling */
    .section {
      padding: 80px 20px;
    }

    .section-title {
      font-size: clamp(2rem, 4vw, 3rem);
      color: #d4ff00;
      margin-bottom: 1rem;
      text-align: center;
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    .section-description {
      text-align: center;
      color: #b0b0b0;
      max-width: 700px;
      margin: 0 auto 3rem;
      font-size: 1.15rem;
    }

    /* Demo Card */
    .demo-card {
      background: #242424;
      border-radius: 16px;
      padding: 40px;
      margin: 0 auto;
      max-width: 1000px;
      border: 1px solid #333;
    }

    textarea {
      width: 100%;
      min-height: 200px;
      padding: 20px;
      border: 1px solid #404040;
      border-radius: 12px;
      font-size: 1.05rem;
      font-family: 'Inter', sans-serif;
      resize: vertical;
      transition: all 0.3s ease;
      background: #2a2a2a;
      color: #e0e0e0;
    }

    textarea:focus {
      outline: none;
      border-color: #d4ff00;
      background: #303030;
      box-shadow: 0 0 0 3px rgba(212, 255, 0, 0.1);
    }

    textarea::placeholder {
      color: #666;
    }

    /* Examples Grid */
    .examples-section {
      margin-top: 40px;
    }

    .examples-title {
      font-size: 1.5rem;
      color: #d4ff00;
      margin-bottom: 20px;
      text-align: center;
      font-weight: 600;
    }

    .examples-subtitle {
      text-align: center;
      color: #999;
      margin-bottom: 30px;
      font-size: 1.05rem;
    }

    .examples-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px;
      margin: 30px 0;
    }

    .example-card {
      background: #2a2a2a;
      border: 1px solid #404040;
      border-radius: 12px;
      padding: 24px;
      cursor: pointer;
      transition: all 0.3s ease;
      position: relative;
    }

    .example-card:hover {
      border-color: #d4ff00;
      transform: translateY(-4px);
      box-shadow: 0 8px 24px rgba(212, 255, 0, 0.15);
    }

    .example-text {
      color: #e0e0e0;
      font-size: 0.95rem;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .example-emotion {
      display: inline-block;
      background: rgba(212, 255, 0, 0.15);
      color: #d4ff00;
      padding: 8px 16px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    /* Loading State */
    .loading-container {
      text-align: center;
      padding: 60px 0;
    }

    .spinner {
      border: 4px solid #404040;
      border-top: 4px solid #d4ff00;
      border-radius: 50%;
      width: 60px;
      height: 60px;
      animation: spin 1s linear infinite;
      margin: 0 auto 24px;
    }

    @keyframes spin {
      0% {
        transform: rotate(0deg);
      }

      100% {
        transform: rotate(360deg);
      }
    }

    .loading-text {
      color: #b0b0b0;
      font-size: 1.1rem;
      margin-bottom: 12px;
    }

    .loading-subtext {
      color: #666;
      font-size: 0.95rem;
      font-style: italic;
    }

    /* Messages */
    .error-message {
      background: rgba(220, 38, 38, 0.1);
      border: 2px solid #dc2626;
      border-radius: 12px;
      padding: 24px;
      color: #fca5a5;
      text-align: center;
      margin-top: 30px;
      font-size: 1.05rem;
    }

    .info-message {
      background: rgba(212, 255, 0, 0.08);
      border: 2px solid rgba(212, 255, 0, 0.3);
      border-radius: 12px;
      padding: 24px;
      color: #e5ff33;
      text-align: center;
      margin-top: 30px;
      font-size: 1.05rem;
      line-height: 1.6;
    }

    /* Result Card */
    .result-card {
      margin-top: 40px;
      padding: 50px;
      border-radius: 16px;
      text-align: center;
      animation: fadeIn 0.6s ease;
      background: #2a2a2a;
      border: 2px solid #404040;
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(30px);
      }

      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .emotion-badge {
      display: inline-flex;
      align-items: center;
      gap: 20px;
      padding: 24px 48px;
      border-radius: 16px;
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 24px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .emotion-icon {
      font-size: 4rem;
    }

    .emotion-text {
      font-size: 1.3rem;
      color: #b0b0b0;
      margin-top: 16px;
      font-weight: 400;
    }

    /* Architecture Section */
    .architecture-section {
      background: #242424;
      border-radius: 16px;
      padding: 50px;
      margin: 0 auto;
      max-width: 1000px;
      border: 1px solid #333;
    }

    .architecture-section h2 {
      text-align: left;
      font-size: 2.5rem;
      margin-bottom: 30px;
    }

    .architecture-content {
      line-height: 1.8;
      color: #d0d0d0;
      font-size: 1.1rem;
    }

    .architecture-content p {
      margin-bottom: 20px;
    }

    .architecture-content strong {
      color: #d4ff00;
      font-weight: 600;
    }

    /* Technical Details */
    .technical-section {
      background: #3d4a3d;
      border-radius: 16px;
      padding: 40px;
      margin: 50px auto 0;
      max-width: 1000px;
      border: 1px solid #4a5a4a;
    }

    .collapsible-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      padding: 10px 0;
      user-select: none;
    }

    .collapsible-header h2 {
      font-size: 1.8rem;
      color: #d4ff00;
      font-weight: 600;
    }

    .collapsible-icon {
      font-size: 2rem;
      color: #d4ff00;
      transition: transform 0.3s ease;
    }

    .collapsible-icon.open {
      transform: rotate(180deg);
    }

    .collapsible-content {
      overflow: hidden;
      transition: max-height 0.4s ease, opacity 0.4s ease;
      opacity: 0;
    }

    .collapsible-content.open {
      opacity: 1;
    }

    .technical-details {
      margin-top: 30px;
    }

    .technical-title {
      font-size: 1.5rem;
      color: #d4ff00;
      margin-bottom: 20px;
      font-weight: 600;
    }

    .technical-description {
      color: #d0d0d0;
      line-height: 1.8;
      margin-bottom: 30px;
      font-size: 1.05rem;
    }

    .technical-specs {
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 16px;
      margin: 30px 0;
      max-width: 700px;
    }

    .spec-label {
      color: #d4ff00;
      font-weight: 600;
      padding-right: 20px;
    }

    .spec-value {
      color: #d0d0d0;
    }

    .technical-links {
      margin-top: 30px;
      display: flex;
      gap: 15px;
      flex-wrap: wrap;
    }

    .link-placeholder {
      display: inline-block;
      padding: 12px 24px;
      background: rgba(212, 255, 0, 0.1);
      border: 1px solid rgba(212, 255, 0, 0.3);
      border-radius: 8px;
      color: #d4ff00;
      text-decoration: none;
      font-size: 0.95rem;
      transition: all 0.3s ease;
      font-weight: 500;
    }

    .link-placeholder:hover {
      background: rgba(212, 255, 0, 0.2);
      border-color: #d4ff00;
      transform: translateY(-2px);
    }

    /* Footer */
    footer {
      background: #0f0f0f;
      padding: 50px 20px;
      text-align: center;
      margin-top: 80px;
      border-top: 1px solid #2a2a2a;
    }

    footer p {
      margin: 12px 0;
      line-height: 1.6;
    }

    .footer-main {
      color: #d4ff00;
      font-size: 1.15rem;
      font-weight: 500;
    }

    .footer-sub {
      color: #808080;
      font-size: 0.95rem;
    }

    /* Responsive */
    @media (max-width: 768px) {
      .hero {
        min-height: 80vh;
        padding: 60px 20px;
      }
      
      .hero-title {
        font-size: 2rem;
        margin-bottom: 1rem;
      }
      
      .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 2rem;
      }
      
      .btn-primary {
        padding: 14px 32px;
        font-size: 1rem;
      }

      .section {
        padding: 60px 20px;
      }
      
      .section-title {
        font-size: 1.8rem;
        margin-bottom: 1rem;
      }
      
      .section-description {
        font-size: 1rem;
        margin-bottom: 2rem;
      }

      .demo-card {
        padding: 25px;
      }
      
      textarea {
        min-height: 150px;
        padding: 15px;
        font-size: 1rem;
      }

      .examples-grid {
        grid-template-columns: 1fr;
        gap: 15px;
      }
      
      .example-card {
        padding: 20px;
      }
      
      .example-text {
        font-size: 0.9rem;
        margin-bottom: 12px;
      }
      
      .example-emotion {
        font-size: 0.75rem;
        padding: 6px 12px;
      }
      
      .examples-title {
        font-size: 1.3rem;
      }
      
      .examples-subtitle {
        font-size: 0.95rem;
      }

      .emotion-badge {
        flex-direction: column;
        gap: 15px;
        padding: 20px 30px;
        font-size: 1.5rem;
      }
      
      .emotion-icon {
        font-size: 3rem;
      }
      
      .emotion-text {
        font-size: 1.1rem;
      }
      
      .result-card {
        padding: 30px 20px;
      }

      .architecture-section {
        padding: 30px 25px;
      }
      
      .architecture-section h2 {
        font-size: 1.8rem;
        margin-bottom: 20px;
      }
      
      .architecture-content {
        font-size: 1rem;
      }

      .technical-section {
        padding: 30px 25px;
      }
      
      .collapsible-header h2 {
        font-size: 1.5rem;
      }
      
      .collapsible-icon {
        font-size: 1.5rem;
      }
      
      .technical-title {
        font-size: 1.3rem;
      }
      
      .technical-description {
        font-size: 0.95rem;
      }

      .technical-specs {
        grid-template-columns: 1fr;
        gap: 12px;
        font-size: 0.9rem;
      }
      
      .spec-label {
        padding-right: 0;
        margin-bottom: 4px;
      }
      
      .technical-links {
        flex-direction: column;
      }
      
      .link-placeholder {
        width: 100%;
        text-align: center;
        padding: 12px 20px;
        font-size: 0.9rem;
      }
      
      footer {
        padding: 40px 20px;
        margin-top: 60px;
      }
      
      .footer-main {
        font-size: 1rem;
      }
      
      footer p {
        font-size: 0.9rem;
      }
      
      .loading-container {
        padding: 40px 0;
      }
      
      .spinner {
        width: 50px;
        height: 50px;
      }
      
      .loading-text {
        font-size: 1rem;
      }
      
      .loading-subtext {
        font-size: 0.85rem;
      }
      
      .info-message,
      .error-message {
        padding: 20px;
        font-size: 1rem;
      }
    }

    @media (max-width: 480px) {
      .hero-title {
        font-size: 1.75rem;
        line-height: 1.2;
      }
      
      .hero-subtitle {
        font-size: 0.95rem;
      }
      
      .btn-primary {
        width: 100%;
        padding: 14px 20px;
        font-size: 0.95rem;
      }
      
      .demo-card {
        padding: 20px;
      }
      
      textarea {
        min-height: 120px;
        padding: 12px;
        font-size: 0.95rem;
      }
      
      .section-title {
        font-size: 1.5rem;
      }
      
      .emotion-badge {
        padding: 15px 20px;
        font-size: 1.3rem;
      }
      
      .emotion-icon {
        font-size: 2.5rem;
      }
      
      .architecture-section,
      .technical-section {
        padding: 25px 20px;
      }
      
      .architecture-section h2,
      .collapsible-header h2 {
        font-size: 1.4rem;
      }
      
      .technical-title {
        font-size: 1.2rem;
      }}