:root {
    --vw-green: #43B14B;
    --vw-green-deep: #2E8A38;
    --vw-green-soft: #E9F6EA;
    --vw-gold: #BA8637;
    --vw-gold-soft: #FBF3E4;
    --vw-ink: #231F20;
    --vw-body: #3B3B3B;
    --vw-muted: #8C8C8C;
    --vw-line: #E7E7E7;
    --vw-bg: #FFFFFF;
    --vw-bg-alt: #F9F9F9;
    --vw-danger: #C6433D;
    --vw-danger-soft: #FBEAE9;
    --vw-radius: 14px;
    --vw-shadow: 0 1px 2px rgba(35,31,32,0.04), 0 8px 24px -12px rgba(35,31,32,0.12);
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --vw-green: #4CC257;
      --vw-green-deep: #3DA646;
      --vw-green-soft: rgba(76,194,87,0.14);
      --vw-gold: #D2A059;
      --vw-gold-soft: rgba(210,160,89,0.14);
      --vw-ink: #F4F3F1;
      --vw-body: #D6D3CF;
      --vw-muted: #9B9691;
      --vw-line: #333230;
      --vw-bg: #18191A;
      --vw-bg-alt: #201F1D;
      --vw-danger: #E0665F;
      --vw-danger-soft: rgba(224,102,95,0.14);
      --vw-shadow: 0 1px 2px rgba(0,0,0,0.3), 0 8px 24px -12px rgba(0,0,0,0.5);
    }
  }
  :root[data-theme="dark"] {
    --vw-green: #4CC257; --vw-green-deep: #3DA646; --vw-green-soft: rgba(76,194,87,0.14);
    --vw-gold: #D2A059; --vw-gold-soft: rgba(210,160,89,0.14);
    --vw-ink: #F4F3F1; --vw-body: #D6D3CF; --vw-muted: #9B9691; --vw-line: #333230;
    --vw-bg: #18191A; --vw-bg-alt: #201F1D; --vw-danger: #E0665F; --vw-danger-soft: rgba(224,102,95,0.14);
    --vw-shadow: 0 1px 2px rgba(0,0,0,0.3), 0 8px 24px -12px rgba(0,0,0,0.5);
  }
  :root[data-theme="light"] {
    --vw-green: #43B14B; --vw-green-deep: #2E8A38; --vw-green-soft: #E9F6EA;
    --vw-gold: #BA8637; --vw-gold-soft: #FBF3E4;
    --vw-ink: #231F20; --vw-body: #3B3B3B; --vw-muted: #8C8C8C; --vw-line: #E7E7E7;
    --vw-bg: #FFFFFF; --vw-bg-alt: #F9F9F9; --vw-danger: #C6433D; --vw-danger-soft: #FBEAE9;
    --vw-shadow: 0 1px 2px rgba(35,31,32,0.04), 0 8px 24px -12px rgba(35,31,32,0.12);
  }

  .vwr-app, .vwr-app * { box-sizing: border-box; }
  .vwr-app {
    font-family: "IBM Plex Sans Thai", "Noto Sans Thai", -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--vw-bg-alt);
    color: var(--vw-body);
    -webkit-font-smoothing: antialiased;
  }
  .vwr-app h1, .vwr-app h2, .vwr-app h3 { color: var(--vw-ink); text-wrap: balance; margin: 0; }

  .vw-shell {
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
    background: var(--vw-bg);
    display: flex;
    flex-direction: column;
  }
  @media (min-width: 481px) {
    .vw-shell {
      min-height: calc(100vh - 34px);
      margin: 20px auto 40px;
      border-radius: 20px;
      box-shadow: var(--vw-shadow);
      overflow: hidden;
      border: 1px solid var(--vw-line);
    }
  }

  .vw-header {
    padding: 18px 20px 14px;
    border-bottom: 1px solid var(--vw-line);
  }
  .vw-logo-row { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
  .vw-logo-mark {
    width: 26px; height: 26px; border-radius: 7px;
    background: var(--vw-green); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 13px; flex-shrink: 0;
  }
  .vw-logo-word { font-weight: 600; font-size: 15px; color: var(--vw-ink); letter-spacing: 0.01em; }
  .vw-logo-sub { font-size: 11.5px; color: var(--vw-muted); }

  .vw-steps { display: flex; align-items: center; gap: 6px; }
  .vw-step-dot {
    flex: 1; height: 4px; border-radius: 3px; background: var(--vw-line);
    transition: background 0.35s ease;
  }
  .vw-step-dot.done, .vw-step-dot.active { background: var(--vw-green); }
  .vw-step-label {
    font-size: 12px; color: var(--vw-muted); margin-top: 8px;
    display: flex; justify-content: space-between;
  }
  .vw-step-label span.current { color: var(--vw-green-deep); font-weight: 600; }

  /* The footer bar is position:sticky, so it occupies normal flow and needs no
     clearance underneath the content -- an earlier 100px bottom padding here
     (left over from a fixed footer) just showed up as dead space above it. */
  .vw-body { padding: 22px 20px 26px; flex: 1; }
  .vw-panel { display: none; animation: vw-fade 0.28s ease; }
  .vw-panel.active { display: block; }
  @keyframes vw-fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
  @media (prefers-reduced-motion: reduce) {
    .vw-panel { animation: none; }
    .vw-shell * { transition: none !important; animation: none !important; }
  }

  .vw-eyebrow { font-size: 12px; font-weight: 600; color: var(--vw-green-deep); letter-spacing: 0.06em; margin-bottom: 4px; }
  .vw-title { font-size: 20px; font-weight: 600; margin-bottom: 6px; }
  .vw-hint { font-size: 13.5px; color: var(--vw-muted); line-height: 1.6; margin-bottom: 22px; }

  .vw-field { margin-bottom: 18px; }
  .vw-field label {
    display: block; font-size: 13.5px; font-weight: 500; color: var(--vw-ink);
    margin-bottom: 7px;
  }
  .vw-field label .req { color: var(--vw-danger); margin-left: 2px; }
  .vw-field label .opt { color: var(--vw-muted); font-weight: 400; font-size: 12.5px; }
  .vw-input, .vw-select, textarea.vw-input {
    width: 100%; padding: 12px 13px; border-radius: 10px; border: 1.5px solid var(--vw-line);
    background: var(--vw-bg); color: var(--vw-ink); font-size: 15px; font-family: inherit;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
  }
  .vw-input:focus, .vw-select:focus, textarea.vw-input:focus {
    outline: none; border-color: var(--vw-green); box-shadow: 0 0 0 3px var(--vw-green-soft);
  }
  .vw-input.err { border-color: var(--vw-danger); }
  .vw-input.err:focus { box-shadow: 0 0 0 3px var(--vw-danger-soft); }
  .vw-err-msg { font-size: 12.5px; color: var(--vw-danger); margin-top: 6px; display: none; }
  .vw-err-msg.show { display: block; }
  textarea.vw-input { resize: vertical; min-height: 72px; }

  .vw-select-wrap { position: relative; }
  .vw-select-wrap::after {
    content: ""; position: absolute; right: 14px; top: 50%; width: 8px; height: 8px;
    border-right: 2px solid var(--vw-muted); border-bottom: 2px solid var(--vw-muted);
    transform: translateY(-65%) rotate(45deg); pointer-events: none;
  }
  .vw-select { appearance: none; padding-right: 34px; }

  .vw-toggle-row { display: flex; gap: 8px; margin-bottom: 14px; }
  .vw-toggle-btn {
    flex: 1; padding: 10px 8px; border-radius: 10px; border: 1.5px solid var(--vw-line);
    background: var(--vw-bg); color: var(--vw-body); font-size: 13.5px; font-weight: 500;
    font-family: inherit; cursor: pointer; text-align: center; transition: all 0.15s ease;
  }
  .vw-toggle-btn.active { border-color: var(--vw-green); background: var(--vw-green-soft); color: var(--vw-green-deep); }

  .vw-upload-box {
    border: 1.5px dashed var(--vw-line); border-radius: 12px; padding: 20px 14px;
    text-align: center; cursor: pointer; background: var(--vw-bg-alt); transition: border-color 0.15s ease;
  }
  .vw-upload-box:hover { border-color: var(--vw-green); }
  .vw-upload-icon { font-size: 22px; margin-bottom: 6px; }
  .vw-upload-box .vw-upload-main { font-size: 13.5px; color: var(--vw-ink); font-weight: 500; }
  .vw-upload-box .vw-upload-sub { font-size: 12px; color: var(--vw-muted); margin-top: 3px; }

  .vw-example-strip {
    display: flex; gap: 10px; align-items: center; background: var(--vw-gold-soft);
    border: 1px solid rgba(186,134,55,0.25); border-radius: 10px; padding: 10px 12px; margin-bottom: 16px;
  }
  .vw-example-strip .vw-ex-thumb {
    width: 44px; height: 53px; border-radius: 6px; flex-shrink: 0; overflow: hidden;
    border: 1px solid rgba(186,134,55,0.3); cursor: pointer; background: #fff;
  }
  .vw-example-strip .vw-ex-thumb img { width: 100%; height: 100%; object-fit: cover; object-position: top; display: block; }
  /* Must sit above the theme's sticky header (z-index 100), which otherwise
     renders over the top strip of this overlay -- including the close button. */
  .vw-example-lightbox {
    display: none; position: fixed; inset: 0; background: rgba(20,18,15,0.72); z-index: 100000;
    align-items: center; justify-content: center; padding: 24px; cursor: zoom-out;
  }
  .vw-example-lightbox.show { display: flex; }
  .vw-example-lightbox img { max-width: min(420px, 92vw); max-height: 85vh; border-radius: 12px; box-shadow: 0 20px 60px rgba(0,0,0,0.4); }
  .vw-lightbox-close {
    position: absolute;
    top: calc(14px + env(safe-area-inset-top, 0px));
    right: calc(14px + env(safe-area-inset-right, 0px));
    width: 42px; height: 42px; border-radius: 50%; border: none;
    background: rgba(255,255,255,0.94); color: #17150f;
    font-size: 27px; line-height: 1; font-family: inherit; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.35);
  }
  .vw-lightbox-close:active { filter: brightness(0.9); }
  .vw-lightbox-close:focus-visible { outline: 2px solid var(--vw-green); outline-offset: 2px; }
  .vw-example-strip .vw-ex-text { font-size: 12px; color: var(--vw-ink); line-height: 1.5; }
  .vw-example-strip .vw-ex-text b { color: var(--vw-gold); }

  .vw-ocr-result {
    display: none; margin-top: 12px; padding: 12px 13px; border-radius: 10px;
    border: 1.5px solid var(--vw-green); background: var(--vw-green-soft);
  }
  .vw-ocr-result.show { display: block; }
  .vw-ocr-result.fail { border-color: var(--vw-danger); background: var(--vw-danger-soft); }
  .vw-ocr-result .vw-ocr-msg { font-size: 13px; font-weight: 500; margin-bottom: 8px; display: flex; gap: 6px; align-items: flex-start; }
  .vw-ocr-result.show:not(.fail) .vw-ocr-msg { color: var(--vw-green-deep); }
  .vw-ocr-result.fail .vw-ocr-msg { color: var(--vw-danger); }

  .vw-product-card {
    border: 1.5px solid var(--vw-line); border-radius: 12px; padding: 16px 14px 4px; margin-bottom: 16px;
    background: var(--vw-bg); position: relative;
  }
  .vw-product-card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
  .vw-product-card-head .vw-pc-title { font-size: 13.5px; font-weight: 600; color: var(--vw-ink); }
  .vw-remove-btn { background: none; border: none; color: var(--vw-muted); font-size: 12.5px; cursor: pointer; font-family: inherit; padding: 4px 6px; }
  .vw-remove-btn:hover { color: var(--vw-danger); }

  .vw-add-product-btn {
    width: 100%; padding: 13px; border-radius: 10px; border: 1.5px dashed var(--vw-green);
    background: var(--vw-green-soft); color: var(--vw-green-deep); font-size: 14px; font-weight: 600;
    font-family: inherit; cursor: pointer; margin-bottom: 6px; transition: background 0.15s ease;
  }
  .vw-add-product-btn:hover { background: rgba(67,177,75,0.2); }

  .vw-conditional { display: none; }
  .vw-conditional.show { display: block; }

  .vw-checkbox-row { display: flex; gap: 11px; align-items: flex-start; margin-bottom: 14px; cursor: pointer; }
  .vw-checkbox-row input[type="checkbox"] {
    width: 19px; height: 19px; flex-shrink: 0; margin-top: 1px; accent-color: var(--vw-green); cursor: pointer;
  }
  .vw-checkbox-row .vw-cb-text { font-size: 13.5px; line-height: 1.55; color: var(--vw-body); }
  .vw-checkbox-row .vw-cb-text a { color: var(--vw-green-deep); text-decoration: underline; }
  .vw-checkbox-row.required .vw-cb-text .req { color: var(--vw-danger); font-weight: 600; }
  .vw-marketing-box {
    background: var(--vw-gold-soft); border: 1px solid rgba(186,134,55,0.25); border-radius: 10px;
    padding: 13px 14px; margin-top: 4px; margin-bottom: 8px;
  }
  .vw-marketing-box .vw-cb-text b { color: var(--vw-gold); display: block; margin-bottom: 2px; font-size: 12px; letter-spacing: 0.03em; }

  .vw-summary-block { border: 1px solid var(--vw-line); border-radius: 12px; padding: 14px 15px; margin-bottom: 14px; }
  .vw-summary-block h3 { font-size: 13px; letter-spacing: 0.02em; color: var(--vw-muted); margin-bottom: 10px; display: flex; justify-content: space-between; align-items: center; }
  .vw-summary-block h3 .vw-edit-link { color: var(--vw-green-deep); font-size: 12.5px; font-weight: 500; cursor: pointer; }
  .vw-summary-row { display: flex; justify-content: space-between; gap: 12px; font-size: 13.5px; padding: 5px 0; }
  .vw-summary-row .k { color: var(--vw-muted); flex-shrink: 0; }
  .vw-summary-row .v { color: var(--vw-ink); text-align: right; font-weight: 500; }

  .vw-footer-bar {
    position: sticky; bottom: 0; padding: 14px 20px; background: var(--vw-bg);
    border-top: 1px solid var(--vw-line); display: flex; gap: 10px;
  }
  .vw-btn {
    flex: 1; padding: 14px; border-radius: 11px; font-size: 15px; font-weight: 600;
    font-family: inherit; cursor: pointer; border: none; transition: filter 0.15s ease, opacity 0.15s ease;
  }
  .vw-btn:active { filter: brightness(0.94); }
  .vw-btn-primary { background: var(--vw-green); color: #fff; }
  .vw-btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }
  .vw-btn-ghost { background: var(--vw-bg-alt); color: var(--vw-body); border: 1.5px solid var(--vw-line); flex: 0 0 92px; }
  .vw-btn-ghost:focus-visible, .vw-btn-primary:focus-visible, .vw-toggle-btn:focus-visible, .vw-add-product-btn:focus-visible { outline: 2px solid var(--vw-green); outline-offset: 2px; }

  /* success + survey */
  .vw-success-wrap { text-align: center; padding: 30px 6px 10px; }
  .vw-check-circle {
    width: 68px; height: 68px; border-radius: 50%; background: var(--vw-green-soft);
    display: flex; align-items: center; justify-content: center; margin: 0 auto 18px;
  }
  .vw-check-circle svg { width: 32px; height: 32px; }
  .vw-check-circle path { stroke: var(--vw-green); stroke-width: 3; fill: none; stroke-linecap: round; stroke-linejoin: round;
    stroke-dasharray: 40; stroke-dashoffset: 40; animation: vw-draw 0.5s ease 0.15s forwards; }
  @keyframes vw-draw { to { stroke-dashoffset: 0; } }
  .vw-reg-number {
    font-size: 22px; font-weight: 700; color: var(--vw-ink); letter-spacing: 0.03em;
    background: var(--vw-bg-alt); border: 1px dashed var(--vw-line); border-radius: 10px;
    padding: 12px; margin: 18px 0; font-variant-numeric: tabular-nums;
  }
  .vw-survey-prompt {
    border: 1px solid var(--vw-line); border-radius: 12px; padding: 16px; margin-top: 22px; text-align: left;
  }
  .vw-star-row { display: flex; gap: 6px; margin: 10px 0 4px; }
  .vw-star { font-size: 26px; cursor: pointer; color: var(--vw-line); transition: color 0.1s ease; user-select: none; }
  .vw-star.on { color: var(--vw-gold); }

  .vw-scale-row { display: flex; gap: 8px; margin-bottom: 4px; }
  .vw-scale-btn {
    width: 40px; height: 40px; border-radius: 9px; border: 1.5px solid var(--vw-line); background: var(--vw-bg);
    font-size: 14px; font-weight: 600; color: var(--vw-body); cursor: pointer; font-family: inherit;
  }
  .vw-scale-btn.on { border-color: var(--vw-green); background: var(--vw-green); color: #fff; }
  .vw-na-check { font-size: 12.5px; color: var(--vw-muted); display: flex; gap: 6px; align-items: center; margin-top: 8px; cursor: pointer; }
  .vw-na-check input { accent-color: var(--vw-muted); }

  .vw-radio-pair { display: flex; gap: 10px; }
  .vw-radio-pill {
    flex: 1; padding: 11px; text-align: center; border-radius: 10px; border: 1.5px solid var(--vw-line);
    font-size: 13.5px; font-weight: 500; cursor: pointer;
  }
  .vw-radio-pill.on-good { border-color: var(--vw-green); background: var(--vw-green-soft); color: var(--vw-green-deep); }
  .vw-radio-pill.on-bad { border-color: var(--vw-danger); background: var(--vw-danger-soft); color: var(--vw-danger); }

  .vw-thanks { text-align: center; padding: 34px 10px; }
  .vw-thanks .vw-emoji { font-size: 34px; margin-bottom: 10px; }

  .vw-dot-badge { display: inline-block; background: var(--vw-danger); color: #fff; font-size: 10px; border-radius: 8px; padding: 1px 6px; margin-left: 6px; vertical-align: middle; }