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

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      background: #fafaf9;
      color: #1c1c1e;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1400px;
      margin: 0 auto;
      padding: 2rem;
    }

    @media (max-width: 768px) {
      .container { padding: 1rem; }
    }

    header {
      text-align: center;
      margin-bottom: 2rem;
    }
    h1 {
      font-size: 2rem;
      font-weight: 600;
      letter-spacing: -0.02em;
      color: #111;
      margin-bottom: 0.25rem;
    }
    .subhead {
      font-size: 0.85rem;
      color: #5e5e5e;
      border-top: 1px solid #e6e6e5;
      display: inline-block;
      padding-top: 0.5rem;
    }
    .permanent-badge {
      display: inline-block;
      background: #1c1c1e;
      color: white;
      font-size: 0.7rem;
      padding: 0.2rem 0.7rem;
      border-radius: 2rem;
      margin-left: 0.5rem;
      vertical-align: middle;
    }

    .main-grid {
      display: grid;
      grid-template-columns: 1fr 360px;
      gap: 1.5rem;
      margin-bottom: 2.5rem;
    }

    @media (max-width: 900px) {
      .main-grid { grid-template-columns: 1fr; }
    }

    .card {
      background: #ffffff;
      border-radius: 1.25rem;
      padding: 1.5rem;
      box-shadow: 0 1px 2px rgba(0,0,0,0.03), 0 8px 20px -8px rgba(0,0,0,0.08);
      border: 1px solid #efefed;
    }

    .card-title {
      font-weight: 600;
      font-size: 1rem;
      margin-bottom: 1rem;
      padding-bottom: 0.5rem;
      border-bottom: 1px solid #efefed;
      color: #1c1c1e;
    }

    .type-selector {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-bottom: 1.25rem;
    }
    .type-btn {
      background: transparent;
      border: 1px solid #e5e5e4;
      padding: 0.5rem 1rem;
      border-radius: 2rem;
      font-size: 0.75rem;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.2s;
      color: #5e5e5e;
      font-family: inherit;
    }
    .type-btn.active {
      background: #1c1c1e;
      border-color: #1c1c1e;
      color: white;
    }
    .type-btn:hover:not(.active) {
      background: #f0f0ef;
    }

    .dynamic-fields {
      margin-bottom: 1.25rem;
    }
    .field-group {
      margin-bottom: 1rem;
    }
    label {
      display: block;
      font-size: 0.7rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.03em;
      color: #8e8e93;
      margin-bottom: 0.3rem;
    }
    input, textarea, select {
      width: 100%;
      padding: 0.7rem 0.9rem;
      font-size: 0.85rem;
      border: 1px solid #e5e5e4;
      border-radius: 0.75rem;
      background: #ffffff;
      font-family: 'Inter', monospace;
    }
    textarea { resize: vertical; min-height: 70px; }
    input:focus, textarea:focus, select:focus {
      outline: none;
      border-color: #a3a3a3;
    }

    .two-cols {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0.75rem;
    }

    .logo-row {
      display: flex;
      gap: 0.75rem;
      align-items: center;
    }
    .logo-row input[type="file"] {
      flex: 1;
      padding: 0.5rem;
      font-size: 0.75rem;
    }
    .clear-logo {
      background: #efefed;
      border: none;
      padding: 0.5rem 1rem;
      border-radius: 2rem;
      font-size: 0.7rem;
      cursor: pointer;
      font-family: inherit;
    }

    .qr-preview {
      text-align: center;
      position: sticky;
      top: 1rem;
    }
    .qr-canvas-box {
      background: white;
      display: inline-block;
      padding: 1rem;
      border-radius: 1rem;
      margin-bottom: 1rem;
    }
    canvas {
      display: block;
      margin: 0 auto;
      border-radius: 0.5rem;
      width: auto;
      height: auto;
    }
    .btn-primary {
      background: #1c1c1e;
      color: white;
      border: none;
      width: 100%;
      padding: 0.75rem;
      font-size: 0.85rem;
      font-weight: 500;
      border-radius: 2rem;
      cursor: pointer;
      margin-top: 0.5rem;
      transition: 0.2s;
    }
    .btn-primary:hover { background: #333; transform: translateY(-1px); }
    .btn-secondary {
      background: transparent;
      border: 1px solid #e5e5e4;
      padding: 0.5rem 1rem;
      border-radius: 2rem;
      font-size: 0.75rem;
      cursor: pointer;
      margin: 0.25rem;
    }
    .btn-group {
      display: flex;
      gap: 0.5rem;
      justify-content: center;
      flex-wrap: wrap;
    }
    .status {
      font-size: 0.7rem;
      color: #8e8e93;
      margin-top: 0.75rem;
    }

    .advanced-section {
      margin-top: 1rem;
      padding-top: 1rem;
      border-top: 1px solid #efefed;
    }
    .color-row {
      display: flex;
      gap: 1rem;
      align-items: center;
      justify-content: space-between;
    }
    input[type="color"] {
      width: 48px;
      height: 38px;
      padding: 0;
      border-radius: 8px;
    }

    .seo-section {
      background: #ffffff;
      border-radius: 1.25rem;
      padding: 2rem;
      border: 1px solid #efefed;
      margin-top: 1rem;
    }
    .seo-section h2 { font-size: 1.3rem; margin-bottom: 1rem; }
    .seo-section h3 { font-size: 1rem; margin: 1.2rem 0 0.5rem; font-weight: 600; }
    .seo-section p { color: #4a4a4e; margin-bottom: 0.8rem; font-size: 0.9rem; line-height: 1.6; }
    
    .permanent-note {
      background: #e8f0e8;
      border-left: 3px solid #2e7d32;
      padding: 1rem;
      border-radius: 0.75rem;
      margin: 1rem 0;
    }
    
    .format-card {
      background: #f9f9f8;
      border-radius: 0.75rem;
      padding: 0.75rem;
      margin-bottom: 0.75rem;
    }
    .format-code {
      font-family: monospace;
      font-size: 0.75rem;
      background: #f0f0ef;
      padding: 0.4rem 0.6rem;
      border-radius: 0.5rem;
      display: inline-block;
      margin-bottom: 0.4rem;
      word-break: break-all;
    }
    .format-desc {
      font-size: 0.8rem;
      color: #5e5e5e;
      line-height: 1.4;
    }
    
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 1rem;
      margin: 1rem 0;
    }

    .related-tools {
      background: #ffffff;
      border-radius: 1.25rem;
      padding: 1.5rem;
      border: 1px solid #efefed;
      margin-top: 1.5rem;
    }
    .tools-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      justify-content: center;
      margin-top: 1rem;
    }
    .tool-link {
      background: #f5f5f4;
      padding: 0.5rem 1.2rem;
      border-radius: 2rem;
      text-decoration: none;
      font-size: 0.8rem;
      font-weight: 500;
      color: #1c1c1e;
      transition: 0.2s;
      cursor: pointer;
    }
    .tool-link:hover {
      background: #e8e8e6;
      transform: translateY(-1px);
    }

    footer {
      text-align: center;
      margin-top: 2rem;
      font-size: 0.7rem;
      color: #aaa;
      border-top: 1px solid #efefed;
      padding-top: 1.5rem;
    }
    @keyframes softPop { 0% { transform: scale(0.98); } 100% { transform: scale(1); } }
    .qr-updated { animation: softPop 0.2s ease; }
    hr { margin: 0.75rem 0; border: 0; border-top: 1px solid #efefed; }