.qrs{--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-primary-ring: #3b82f6;--color-primary-tint: #eff6ff;--color-gain: #d97706;--color-surface: #ffffff;--color-surface-muted: #f9fafb;--color-surface-placeholder: #f3f4f6;--color-border: #e5e7eb;--color-border-input: #d1d5db;--color-text-heading: #111827;--color-text-body: #374151;--color-text-secondary: #4b5563;--color-text-muted: #6b7280;--gradient-hero: linear-gradient(to right, #eef2ff, #ffffff, #fdf2f8);--radius-input: .5rem;--radius-card: 1rem;--shadow-card: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-raised: 0 10px 15px -3px rgb(0 0 0 / .1);color:var(--color-text-body);background:#fcfcfd;line-height:1.5;-webkit-font-smoothing:antialiased}.qrs *{box-sizing:border-box}.qrs-container{max-width:72rem;margin-inline:auto;padding-inline:1rem;padding-bottom:1rem}@media (min-width: 640px){.qrs-container{padding-inline:1.5rem}}@media (min-width: 1024px){.qrs-container{padding-inline:2rem}}.qrs .card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:1.5rem}.qrs .card--raised{box-shadow:var(--shadow-raised)}.qrs .btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;background:var(--color-primary);color:#fff;font-weight:600;padding:.625rem 1.5rem;border-radius:var(--radius-input);border:0;cursor:pointer;text-decoration:none;transition:.15s;font-size:1rem}.qrs .btn:hover{background:var(--color-primary-hover)}.qrs .btn:focus-visible{outline:2px solid var(--color-primary-ring);outline-offset:2px}.qrs .btn:disabled{opacity:.55;cursor:not-allowed}.qrs .btn--full{width:100%}.qrs .btn--ghost{background:var(--color-surface);color:var(--color-text-body);border:1px solid var(--color-border-input)}.qrs .btn--ghost:hover{background:var(--color-surface-muted)}.qrs h2.section{font-size:1.5rem;font-weight:700;color:var(--color-text-heading);letter-spacing:-.01em;margin:0}.qrs h3.panel{font-size:1.125rem;font-weight:600;color:var(--color-text-heading);margin:0 0 1.1rem}.qrs .muted{color:var(--color-text-muted)}.qrs .layout{display:grid;grid-template-columns:1fr;gap:1.5rem;margin-top:2rem}@media (min-width: 920px){.qrs .layout{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);align-items:start}.qrs .side-card{position:sticky;top:1.5rem}}.qrs .tabs{display:flex;gap:.5rem;background:var(--color-surface-muted);border:1px solid var(--color-border);border-radius:var(--radius-input);padding:.3rem;margin-bottom:1.5rem}.qrs .tab{flex:1 1 0;padding:.55rem .75rem;border:0;background:transparent;cursor:pointer;font-size:.92rem;font-weight:600;color:var(--color-text-muted);border-radius:calc(var(--radius-input) - .15rem);transition:.15s}.qrs .tab:hover{color:var(--color-text-body)}.qrs .tab.is-active{background:var(--color-surface);color:var(--color-primary);box-shadow:var(--shadow-card)}.qrs .tab:focus-visible{outline:2px solid var(--color-primary-ring);outline-offset:2px}.qrs .stage{position:relative;width:100%;aspect-ratio:4/3;border-radius:var(--radius-card);overflow:hidden;background:#0f172a;display:flex;align-items:center;justify-content:center}.qrs .stage__video{width:100%;height:100%;object-fit:cover;display:block}.qrs .stage__placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:1.5rem;color:#cbd5e1}.qrs .stage__icon{width:48px;height:48px;color:#94a3b8;margin-bottom:.8rem}.qrs .stage__icon svg{width:100%;height:100%}.qrs .stage__hint{margin:0;font-size:.9rem;max-width:22rem}.qrs .scan-frame{position:absolute;inset:18%;border:3px solid rgba(255,255,255,.85);border-radius:1rem;box-shadow:0 0 0 100vmax #0f172a59;pointer-events:none;transition:border-color .2s}.qrs .scan-frame--hit{border-color:#34d399}.qrs .controls{margin-top:1.25rem;display:flex;flex-direction:column;gap:.6rem}.qrs .cam-note{margin:.9rem 0 0;padding:.7rem .85rem;border-radius:var(--radius-input);font-size:.84rem;line-height:1.45;background:var(--color-primary-tint);color:var(--color-primary-hover);border:1px solid #bfdbfe}.qrs .cam-note--warn{background:#fffbeb;color:#b45309;border-color:#fde68a}.qrs .dropzone{border:2px dashed var(--color-border-input);border-radius:var(--radius-card);background:var(--color-surface-muted);padding:3rem 1.5rem;text-align:center;cursor:pointer;transition:.18s;user-select:none}.qrs .dropzone:hover,.qrs .dropzone.is-drag{border-color:var(--color-primary-ring);background:var(--color-primary-tint)}.qrs .dropzone.is-drag{border-style:solid}.qrs .dropzone:focus-visible{outline:2px solid var(--color-primary-ring);outline-offset:2px}.qrs .dropzone__icon{width:56px;height:56px;margin:0 auto .9rem;color:var(--color-primary)}.qrs .dropzone__icon svg{width:100%;height:100%;display:block}.qrs .dropzone__title{font-weight:700;font-size:1.15rem;color:var(--color-text-heading)}.qrs .dropzone__sub{font-size:.92rem;color:var(--color-text-muted);margin-top:.35rem}.qrs .preview{margin-top:1.25rem;display:flex;justify-content:center}.qrs .preview__img{max-width:100%;max-height:320px;border-radius:var(--radius-input);border:1px solid var(--color-border);box-shadow:var(--shadow-card);background:var(--color-surface-placeholder)}.qrs .result-empty{color:var(--color-text-muted);font-size:.92rem}.qrs .result-empty p{margin:0}.qrs .result-badge{display:inline-block;font-size:.72rem;font-weight:800;letter-spacing:.04em;text-transform:uppercase;padding:.2rem .55rem;border-radius:999px;margin-bottom:.7rem;background:var(--color-surface-placeholder);color:var(--color-text-secondary);border:1px solid var(--color-border)}.qrs .result-badge--link{background:var(--color-primary-tint);color:var(--color-primary);border-color:#bfdbfe}.qrs .result-box{background:var(--color-surface-muted);border:1px solid var(--color-border);border-radius:var(--radius-input);padding:.85rem;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9rem;color:var(--color-text-heading);word-break:break-word;white-space:pre-wrap;max-height:240px;overflow:auto}.qrs .result-box:focus-visible{outline:2px solid var(--color-primary-ring);outline-offset:1px}.qrs .result-actions{margin-top:1rem;display:flex;flex-direction:column;gap:.6rem}.qrs .copied{margin:.7rem 0 0;text-align:center;font-size:.84rem;font-weight:600;color:#047857}.qrs .how{margin-top:3.25rem}.qrs .how h2.section{text-align:center}.qrs .how__lead{text-align:center;color:var(--color-text-secondary);margin:.4rem 0 1.75rem}.qrs .steps{display:grid;grid-template-columns:1fr;gap:1.1rem}@media (min-width: 720px){.qrs .steps{grid-template-columns:repeat(3,1fr)}}.qrs .step{text-align:center;padding:1.75rem 1.25rem}.qrs .step__n{width:2.5rem;height:2.5rem;margin:0 auto .9rem;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;font-weight:800;font-size:1.1rem;color:var(--color-primary);background:var(--color-primary-tint);border:1px solid #bfdbfe}.qrs .step h3{font-size:1.05rem;font-weight:700;color:var(--color-text-heading);margin:0 0 .4rem}.qrs .step p{margin:0;font-size:.9rem;color:var(--color-text-secondary)}.qrs .privacy-line{margin-top:1.75rem;display:flex;align-items:center;gap:1rem;background:#ecfdf5;border:1px solid #a7f3d0}.qrs .privacy-line__icon{font-size:1.5rem;flex:0 0 auto}.qrs .privacy-line strong{color:#065f46}.qrs .privacy-line p{margin:0;color:#047857;font-size:.95rem}.qrs .about{margin-top:2.5rem;max-width:46rem;margin-inline:auto}.qrs .about h2.section{margin-bottom:.75rem}.qrs .about p{margin:0 0 1rem;color:var(--color-text-secondary);font-size:.95rem}.qrs .foot{margin:2.5rem 0 1rem;padding-top:1.25rem;border-top:1px solid var(--color-border);text-align:center}.qrs .foot p{margin:0;font-size:.85rem}