:root {
      --accent: #7C3AED;
      --accent-h: #6D28D9;
      --accent-l: #8B5CF6;
      --accent-bg: #F5F3FF;
      --accent-bdr: #C4B5FD;
      --bg: #F5F3FF;
      --card: #FFFFFF;
      --bdr: #E5E7EB;
      --bdr-l: #F3F4F6;
      --text: #1E1B4B;
      --muted: #6B7280;
      --light: #9CA3AF;
      --green: #059669;
      --red: #DC2626;
      --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      --mono: 'JetBrains Mono', monospace;
      --r: 12px;
      --r-sm: 8px;
      --r-lg: 16px;
      --shadow: 0 2px 8px rgba(124,58,237,0.08);
      --shadow-lg: 0 8px 32px rgba(124,58,237,0.14);
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; min-height: 100vh; }

    /* ── NAV ── */
    nav {
      background: var(--card);
      border-bottom: 1px solid var(--bdr);
      padding: 0 20px;
      position: sticky; top: 0; z-index: 100;
    }
    .nav-inner {
      max-width: 1060px; margin: 0 auto;
      display: flex; align-items: center; justify-content: space-between;
      height: 58px;
    }
    .logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
    .logo-icon {
      width: 36px; height: 36px; border-radius: 10px;
      background: linear-gradient(135deg, var(--accent), var(--accent-l));
      display: flex; align-items: center; justify-content: center;
      color: #fff; font-size: 17px; font-weight: 800; font-family: var(--font);
    }
    .logo-text { font-size: 20px; font-weight: 700; color: var(--text); }
    .logo-text span { color: var(--accent); }
    .nav-badge {
      font-size: 11px; font-weight: 600; color: var(--accent);
      background: var(--accent-bg); border: 1px solid var(--accent-bdr);
      padding: 3px 10px; border-radius: 20px;
    }

    /* ── LAYOUT ── */
    .wrap { max-width: 1060px; margin: 0 auto; padding: 0 20px; }

    /* ── HERO ── */
    .hero { text-align: center; padding: 44px 20px 32px; }
    .hero h1 { font-size: clamp(26px,4vw,36px); font-weight: 800; color: var(--text); margin-bottom: 10px; line-height: 1.2; }
    .hero h1 span { color: var(--accent); }
    .hero p { color: var(--muted); font-size: 16px; max-width: 520px; margin: 0 auto; }

    /* ── TYPE TABS ── */
    .type-tabs {
      display: flex; gap: 6px; overflow-x: auto; padding-bottom: 4px;
      margin-bottom: 24px; scrollbar-width: none;
    }
    .type-tabs::-webkit-scrollbar { display: none; }
    .tab-btn {
      padding: 9px 14px; border-radius: 10px; border: 1.5px solid transparent;
      background: transparent; color: var(--muted); font-size: 12.5px; font-weight: 500;
      font-family: var(--font); cursor: pointer; white-space: nowrap;
      transition: all 0.18s; display: flex; align-items: center; gap: 5px;
    }
    .tab-btn:hover { background: var(--card); color: var(--text); border-color: var(--bdr); }
    .tab-btn.active {
      background: var(--card); color: var(--accent); border-color: var(--accent);
      font-weight: 600; box-shadow: var(--shadow);
    }

    /* ── MAIN GRID ── */
    .tool-grid {
      display: grid; grid-template-columns: 1fr 340px; gap: 24px; align-items: start;
    }
    @media (max-width: 768px) {
      .tool-grid { grid-template-columns: 1fr; }
      .preview-col { position: static !important; }
    }

    /* ── CARDS ── */
    .card {
      background: var(--card); border: 1px solid var(--bdr);
      border-radius: var(--r-lg); padding: 24px;
    }
    .card-title { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 18px; }

    /* ── FORM ELEMENTS ── */
    .field { margin-bottom: 14px; }
    .field label {
      display: block; font-size: 11px; font-weight: 600; color: var(--muted);
      text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 5px;
    }
    .field input, .field textarea, .field select {
      width: 100%; padding: 10px 13px; border-radius: var(--r-sm);
      border: 1.5px solid var(--bdr); background: #FAFAFA; color: var(--text);
      font-size: 14px; font-family: var(--font); outline: none;
      transition: border-color 0.15s, box-shadow 0.15s;
    }
    .field input:focus, .field textarea:focus, .field select:focus {
      border-color: var(--accent); box-shadow: 0 0 0 3px rgba(124,58,237,0.1);
    }
    .field textarea { resize: vertical; min-height: 80px; }
    .field select { appearance: none; cursor: pointer; }

    /* ── TOGGLE GROUP ── */
    .toggle-group { display: flex; gap: 6px; }
    .toggle-btn {
      flex: 1; padding: 8px 6px; border-radius: var(--r-sm);
      border: 1.5px solid var(--bdr); background: #FAFAFA;
      color: var(--text); font-size: 12px; font-weight: 500;
      font-family: var(--font); cursor: pointer; text-align: center; transition: all 0.15s;
    }
    .toggle-btn.active {
      border-color: var(--accent); background: var(--accent-bg);
      color: var(--accent); font-weight: 600;
    }

    /* ── DIVIDER ── */
    .divider { border: none; border-top: 1px solid var(--bdr-l); margin: 20px 0; }

    /* ── COLOUR SECTION ── */
    .section-label { font-size: 11px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
    .colour-row { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-bottom: 16px; }
    .colour-swatch {
      width: 30px; height: 30px; border-radius: 8px; cursor: pointer;
      border: 2px solid transparent; transition: all 0.15s; flex-shrink: 0;
    }
    .colour-swatch.active { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-bg); }
    .colour-custom { display: flex; align-items: center; gap: 5px; margin-left: 4px; }
    .colour-custom input[type=color] {
      width: 30px; height: 30px; padding: 0; border: none;
      border-radius: 6px; cursor: pointer; background: none;
    }
    .colour-custom span { font-size: 10px; color: var(--light); }

    /* ── GENERATE BTN ── */
    .btn-generate {
      width: 100%; padding: 14px; border-radius: var(--r); border: none;
      font-size: 15px; font-weight: 600; font-family: var(--font);
      cursor: pointer; transition: all 0.25s; margin-top: 4px;
    }
    .btn-generate.ready {
      background: linear-gradient(135deg, var(--accent), var(--accent-l));
      color: #fff; box-shadow: 0 4px 16px rgba(124,58,237,0.28);
    }
    .btn-generate.ready:hover { background: linear-gradient(135deg, var(--accent-h), var(--accent)); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(124,58,237,0.35); }
    .btn-generate.disabled { background: var(--bdr-l); color: var(--light); cursor: not-allowed; }

    /* ── PREVIEW PANEL ── */
    .preview-col { position: sticky; top: 74px; }
    .preview-label { font-size: 11px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 14px; text-align: center; }
    .qr-display {
      display: flex; align-items: center; justify-content: center;
      min-height: 260px; margin-bottom: 16px;
    }
    .qr-placeholder {
      width: 248px; height: 248px; border-radius: var(--r);
      background: var(--bdr-l); border: 2px dashed var(--bdr);
      display: flex; flex-direction: column; align-items: center; justify-content: center;
      gap: 10px;
    }
    .qr-placeholder-icon { font-size: 32px; opacity: 0.4; }
    .qr-placeholder-text { font-size: 13px; color: var(--light); }
    #qr-canvas {
      border-radius: var(--r); border: 1px solid var(--bdr);
      display: block; max-width: 248px; max-height: 248px;
    }
    /* hidden worker element */
    #qr-worker { position: absolute; left: -9999px; top: -9999px; width: 0; height: 0; overflow: hidden; }

    /* ── DOWNLOAD BTNS ── */
    .dl-row { display: flex; gap: 8px; margin-bottom: 14px; }
    .btn-dl {
      flex: 1; padding: 10px 8px; border-radius: var(--r-sm);
      font-size: 12px; font-weight: 600; font-family: var(--font);
      cursor: pointer; transition: all 0.15s; text-align: center;
    }
    .btn-dl-png {
      background: linear-gradient(135deg, var(--accent), var(--accent-l));
      color: #fff; border: none; box-shadow: 0 2px 8px rgba(124,58,237,0.25);
    }
    .btn-dl-png:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(124,58,237,0.35); }
    .btn-dl-svg {
      background: var(--accent-bg); color: var(--accent);
      border: 1.5px solid var(--accent-bdr);
    }
    .btn-dl-svg:hover { background: #EDE9FE; }

    /* ── QR STATS ── */
    .qr-stats {
      background: var(--bdr-l); border-radius: 10px; padding: 12px 14px;
    }
    .stat-row {
      display: flex; justify-content: space-between; align-items: center;
      font-size: 11.5px; color: var(--muted); padding: 3px 0;
    }
    .stat-val { font-weight: 600; color: var(--text); font-family: var(--mono); font-size: 11px; }
    .stat-val.green { color: var(--green); font-family: var(--font); }

    /* ── SOCIAL PROOF ── */
    .social-proof {
      margin-top: 12px; padding: 14px; border-radius: var(--r);
      background: var(--card); border: 1px solid var(--bdr); text-align: center;
    }
    .social-num { font-size: 24px; font-weight: 800; color: var(--accent); font-family: var(--mono); }
    .social-label { font-size: 11px; color: var(--muted); margin-top: 2px; }

    /* ── FEATURES ── */
    .features { margin-top: 52px; }
    .section-heading { font-size: 24px; font-weight: 800; color: var(--text); text-align: center; margin-bottom: 8px; }
    .section-sub { font-size: 15px; color: var(--muted); text-align: center; margin-bottom: 32px; }
    .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    @media (max-width: 640px) { .feature-grid { grid-template-columns: 1fr; } }
    .feature-card {
      padding: 24px; border-radius: var(--r-lg);
      background: var(--card); border: 1px solid var(--bdr); text-align: center;
    }
    .feature-icon { font-size: 30px; margin-bottom: 10px; }
    .feature-title { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
    .feature-desc { font-size: 13.5px; color: var(--muted); line-height: 1.65; }

    /* ── QR TYPES GRID ── */
    .types-section { margin-top: 52px; }
    .types-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
    .type-card {
      padding: 16px 12px; border-radius: var(--r); background: var(--card);
      border: 1px solid var(--bdr); text-align: center; cursor: pointer; transition: all 0.15s;
    }
    .type-card:hover { border-color: var(--accent); background: var(--accent-bg); transform: translateY(-2px); box-shadow: var(--shadow); }
    .type-card-icon { font-size: 22px; margin-bottom: 6px; }
    .type-card-label { font-size: 13px; font-weight: 600; color: var(--text); }
    .type-card-desc { font-size: 11px; color: var(--muted); margin-top: 3px; }

    /* ── FAQ ── */
    .faq-section { margin-top: 52px; max-width: 720px; margin-left: auto; margin-right: auto; }
    .faq-item { border: 1px solid var(--bdr); border-radius: var(--r); margin-bottom: 10px; background: var(--card); overflow: hidden; }
    .faq-q {
      padding: 16px 20px; font-size: 15px; font-weight: 600; color: var(--text);
      cursor: pointer; display: flex; justify-content: space-between; align-items: center;
      user-select: none;
    }
    .faq-q:hover { background: var(--bdr-l); }
    .faq-arrow { font-size: 12px; color: var(--accent); transition: transform 0.2s; flex-shrink: 0; margin-left: 12px; }
    .faq-a { padding: 0 20px 16px; font-size: 14.5px; color: var(--muted); line-height: 1.7; display: none; }
    .faq-item.open .faq-a { display: block; }
    .faq-item.open .faq-arrow { transform: rotate(180deg); }

    /* ── FOOTER ── */
    footer { margin-top: 60px; border-top: 1px solid var(--bdr); padding: 28px 20px; text-align: center; }
    .footer-inner { max-width: 1060px; margin: 0 auto; }
    footer p { font-size: 12px; color: var(--light); }
    footer a { color: var(--muted); text-decoration: none; }
    footer a:hover { color: var(--accent); }
    .footer-links { display: flex; gap: 20px; justify-content: center; margin-bottom: 10px; flex-wrap: wrap; }

    /* ── TOAST ── */
    .toast {
      position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
      background: #1F2937; color: #fff; padding: 10px 20px;
      border-radius: 30px; font-size: 13px; font-weight: 500;
      box-shadow: 0 4px 20px rgba(0,0,0,0.2); z-index: 9999;
      opacity: 0; pointer-events: none; transition: opacity 0.3s;
    }
    .toast.show { opacity: 1; }

    /* ── TYPE PAGE CONTENT ── */
    .content-section { margin-top: 48px; }
    .content-section h2 { font-size: 22px; font-weight: 800; color: var(--text); margin-bottom: 12px; }
    .content-section p { font-size: 15px; color: var(--muted); line-height: 1.75; margin-bottom: 14px; }
    .content-section ul { margin: 0 0 14px 0; padding-left: 20px; }
    .content-section li { font-size: 15px; color: var(--muted); line-height: 1.75; margin-bottom: 6px; }
    .content-section strong { color: var(--text); font-weight: 600; }
    .steps-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 14px; margin-top: 16px; }
    .step-card { padding: 20px; background: var(--card); border: 1px solid var(--bdr); border-radius: var(--r); }
    .step-num { width: 28px; height: 28px; border-radius: 50%; background: linear-gradient(135deg,var(--accent),var(--accent-l)); color:#fff; font-size:13px; font-weight:700; display:flex;align-items:center;justify-content:center; margin-bottom:10px; }
    .step-title { font-size:14px; font-weight:700; color:var(--text); margin-bottom:4px; }
    .step-desc { font-size:13px; color:var(--muted); line-height:1.6; }
    .use-cases-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(180px,1fr)); gap:12px; margin-top:16px; }
    .use-case { padding:16px; background:var(--card); border:1px solid var(--bdr); border-radius:var(--r); display:flex; gap:10px; align-items:flex-start; }
    .use-case-icon { font-size:20px; flex-shrink:0; margin-top:2px; }
    .use-case-text { font-size:13px; font-weight:600; color:var(--text); }
    .related-types { display:flex; gap:8px; flex-wrap:wrap; margin-top:16px; }
    .related-btn { padding:8px 14px; border-radius:30px; border:1.5px solid var(--bdr); background:var(--card); color:var(--text); font-size:13px; font-weight:500; font-family:var(--font); cursor:pointer; text-decoration:none; transition:all 0.15s; }
    .related-btn:hover { border-color:var(--accent); background:var(--accent-bg); color:var(--accent); }
    @media (max-width:640px) { .steps-grid,.use-cases-grid { grid-template-columns:1fr 1fr; } }
    @media (max-width:400px) { .steps-grid,.use-cases-grid { grid-template-columns:1fr; } }