:root {
      --base-sdb: #11121a;
      --line-sdb: #42434a;
      --hover-sdb: #222533;
      --text-sdb: #e6e6ef;
      --accent-sdb: #3b82f6;
      --secondary-text-sdb: #b0b3c1;
      --section-bg: #181a23;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: 'Poppins', 'Segoe UI', sans-serif;
    }

    /* QR Generator Container */
    .features {
      padding: 8rem 1rem 4rem;
    }

    .section-title {
      text-align: center;
      margin-bottom: 3rem;
    }

    .section-title h2 {
      font-size: 2.5rem;
      margin-bottom: 1rem;
    }

    .section-title p {
      color: var(--secondary-text-sdb);
      max-width: 600px;
      margin: 0 auto;
    }

    .qr-generator-container {
      max-width: 1200px;
      margin: 2rem auto;
      padding: 0 1rem;
    }

    .qr-generator-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
      background: var(--section-bg);
      border-radius: 1rem;
      padding: 2rem;
      border: 1px solid var(--line-sdb);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    }

    /* Form Controls */
    .form-group {
      margin-bottom: 1.5rem;
    }

    .form-group label {
      display: block;
      margin-bottom: 0.5rem;
      font-weight: 500;
      color: var(--text-sdb);
    }

    .form-control {
      width: 100%;
      padding: 0.8rem 1rem;
      border-radius: 0.5rem;
      border: 1px solid var(--line-sdb);
      background-color: var(--base-sdb);
      color: var(--text-sdb);
      font-family: inherit;
      transition: border-color 0.3s ease;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--accent-sdb);
      box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
    }

    /* Range Input */
    input[type="range"] {
      width: 100%;
      height: 5px;
      -webkit-appearance: none;
      background: var(--line-sdb);
      border-radius: 5px;
      margin: 10px 0;
      outline: none;
    }

    input[type="range"]::-webkit-slider-thumb {
      -webkit-appearance: none;
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: var(--accent-sdb);
      cursor: pointer;
      transition: all 0.3s ease;
    }

    input[type="range"]::-webkit-slider-thumb:hover {
      transform: scale(1.2);
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
    }

    #sizeValue {
      display: block;
      text-align: center;
      font-size: 0.9rem;
      color: var(--secondary-text-sdb);
    }

    /* Color Inputs */
    .color-input-group {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-bottom: 0.5rem;
    }

    .color-input-group label {
      margin-bottom: 0;
      flex: 0 0 80px;
    }

    input[type="color"] {
      -webkit-appearance: none;
      width: 40px;
      height: 40px;
      border: none;
      border-radius: 0.5rem;
      background: transparent;
      cursor: pointer;
      flex: 0 0 auto;
    }

    input[type="color"]::-webkit-color-swatch {
      border-radius: 0.5rem;
      border: 1px solid var(--line-sdb);
    }

    input[type="color"]::-webkit-color-swatch-wrapper {
      padding: 0;
    }

    .hex-input {
      width: 100px;
      padding: 0.5rem;
      border-radius: 0.3rem;
      border: 1px solid var(--line-sdb);
      background-color: var(--base-sdb);
      color: var(--text-sdb);
    }

    /* QR Type Selector */
    .qr-type-selector {
      display: flex;
      gap: 0.5rem;
      margin-bottom: 1rem;
      flex-wrap: wrap;
    }

    .qr-type-btn {
      padding: 0.5rem 1rem;
      border-radius: 0.5rem;
      background-color: var(--base-sdb);
      color: var(--text-sdb);
      border: 1px solid var(--line-sdb);
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .qr-type-btn.active {
      background-color: var(--accent-sdb);
      color: white;
      border-color: var(--accent-sdb);
    }

    /* Form Sections */
    .url-text-input,
    .wifi-form,
    .contact-form {
      display: none;
    }

    .url-text-input.active,
    .wifi-form.active,
    .contact-form.active {
      display: block;
    }

    /* Logo Upload */
    .logo-upload {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
      margin-bottom: 1rem;
    }

    .logo-preview {
      width: 60px;
      height: 60px;
      border: 1px dashed var(--line-sdb);
      border-radius: 0.5rem;
      display: flex;
      align-items: center;
      justify-content: center;
      /* overflow: hidden; */
      margin-top: 0.5rem;
      position: relative;
    }

    .logo-preview img {
      max-width: 100%;
      max-height: 100%;
      object-fit: contain;
    }

    .logo-options {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
      margin-top: 0.5rem;
    }

    .remove-logo {
      position: absolute;
      top: -8px;
      right: -8px;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background-color: #ff6b6b;
      color: white;
      border: none;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .logo-preview:hover .remove-logo {
      opacity: 1;
    }

    /* Buttons */
    #generateBtn {
      margin-top: 1rem;
      padding: 0.9rem 1.5rem;
      font-size: 1rem;
      border-radius: 0.5rem;
      background-color: var(--accent-sdb);
      color: white;
      border: none;
      cursor: pointer;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      width: 100%;
    }

    #generateBtn:hover {
      background-color: #2563eb;
      transform: translateY(-2px);
      box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
    }

    /* Preview Section */
    .qr-preview {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-start;
      padding: 1.5rem;
      background-color: var(--base-sdb);
      border-radius: 0.5rem;
      border: 1px solid var(--line-sdb);
      position: relative;
      min-height: 400px;
    }

    #qrCanvas {
      border-radius: 0.5rem;
      background-color: white;
      padding: 0.5rem;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
      transition: all 0.3s ease;
    }

    .preview-placeholder {
      position: absolute;
      color: var(--secondary-text-sdb);
      text-align: center;
      width: 100%;
      margin-top: 5em;
    }

    .download-options {
      display: flex;
      gap: 1rem;
      margin-top: 1.5rem;
      flex-wrap: wrap;
      justify-content: center;
    }

    .download-btn {
      padding: 0.8rem 1.5rem;
      background-color: transparent;
      color: var(--accent-sdb);
      border: 1px solid var(--accent-sdb);
      border-radius: 0.5rem;
      cursor: pointer;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .download-btn:hover:not(:disabled) {
      background-color: var(--accent-sdb);
      color: white;
      transform: translateY(-2px);
    }

    .download-btn:disabled {
      opacity: 0.5;
      cursor: not-allowed;
    }

    /* Loading Animation */
    .loading {
      display: none;
      width: 40px;
      height: 40px;
      border: 4px solid rgba(59, 130, 246, 0.2);
      border-radius: 50%;
      border-top: 4px solid var(--accent-sdb);
      animation: spin 1s linear infinite;
      margin: 1rem auto;
    }

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

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

    /* Error Message */
    .error-message {
      color: #ff6b6b;
      font-size: 0.9rem;
      margin-top: 0.5rem;
      display: none;
    }

    /* Responsive Design */
    @media (max-width: 968px) {
      .qr-generator-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
      }

      .qr-preview {
        order: -1;
        padding: 1rem;
        min-height: 300px;
      }

      #qrCanvas {
        max-width: 100%;
        height: auto;
      }
    }

    @media (max-width: 480px) {
      .qr-generator-container {
        padding: 0 0.5rem;
      }

      .qr-generator-grid {
        padding: 1.5rem;
      }

      .color-input-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
      }

      .download-options {
        flex-direction: column;
        width: 100%;
      }

      .download-btn {
        width: 100%;
        justify-content: center;
      }

      .section-title h2 {
        font-size: 2rem;
      }
    }