:root{--bg: #f4f4f4;--surface: #ffffff;--border: #e0e0e0;--primary: #0f62fe;--primary-hover: #0043ce;--primary-light: #d0e2ff;--text: #161616;--text-secondary: #525252;--muted: #8d8d8d;--success: #24a148;--success-bg: #defbe6;--error: #da1e28;--error-bg: #fff1f1;--warning: #f1c21b;--radius: .5rem;--radius-lg: .75rem;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .06);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .1);--font-sans: "IBM Plex Sans", system-ui, -apple-system, sans-serif;--font-mono: "IBM Plex Mono", "SF Mono", monospace;--touch-min: 48px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-text-size-adjust:100%}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);min-height:100dvh;line-height:1.5;-webkit-font-smoothing:antialiased}#app{max-width:720px;margin:0 auto;padding:1.5rem;min-height:100dvh}.app-header{display:flex;align-items:center;justify-content:space-between;padding-bottom:1.5rem;margin-bottom:1.5rem;border-bottom:1px solid var(--border)}.app-logo{font-weight:700;font-size:1.25rem;color:var(--primary);text-decoration:none;letter-spacing:-.01em}.app-nav{display:flex;gap:.25rem}.app-nav a,.app-nav button{font-family:var(--font-sans);font-size:.875rem;font-weight:500;color:var(--text-secondary);text-decoration:none;padding:.5rem .75rem;border-radius:var(--radius);border:none;background:none;cursor:pointer;min-height:var(--touch-min);display:inline-flex;align-items:center;transition:background .15s,color .15s}.app-nav a:hover,.app-nav button:hover{background:var(--primary-light);color:var(--primary)}.app-nav a.active{background:var(--primary);color:#fff}.page-title{font-weight:600;font-size:1.5rem;margin-bottom:.25rem;letter-spacing:-.01em}.page-subtitle{font-size:.9rem;color:var(--text-secondary);margin-bottom:1.5rem}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;margin-bottom:2rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:1.25rem;transition:box-shadow .2s}.card:hover{box-shadow:var(--shadow)}.card-label{font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:.5rem;font-weight:500}.card-value{font-family:var(--font-mono);font-weight:500;font-size:1.75rem;color:var(--text);line-height:1.2}.card-value--success{color:var(--success)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.875rem 1.5rem;font-family:var(--font-sans);font-weight:500;font-size:1rem;color:#fff;background:var(--primary);border:2px solid transparent;border-radius:var(--radius);cursor:pointer;text-decoration:none;transition:background .15s,transform .1s;min-height:var(--touch-min);min-width:var(--touch-min);-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}.btn:hover{background:var(--primary-hover)}.btn:active{transform:scale(.98)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn--large{padding:1.125rem 2rem;font-size:1.125rem;border-radius:var(--radius-lg);min-height:56px}.btn--secondary{background:var(--surface);color:var(--text);border-color:var(--border)}.btn--secondary:hover{background:var(--bg)}.btn--success{background:var(--success)}.btn--success:hover{background:#198038}.btn--danger{background:var(--error)}.btn--danger:hover{background:#b81922}.btn--ghost{background:transparent;color:var(--primary);border-color:transparent}.btn--ghost:hover{background:var(--primary-light)}.btn--block{width:100%}.form-group{margin-bottom:1.25rem}.form-label{display:block;font-size:.875rem;font-weight:500;color:var(--text);margin-bottom:.375rem}.form-input{display:block;width:100%;padding:.75rem 1rem;font-family:var(--font-sans);font-size:1rem;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);outline:none;min-height:var(--touch-min);transition:border-color .15s,box-shadow .15s}.form-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.form-input::placeholder{color:var(--muted)}.form-input--mono{font-family:var(--font-mono);letter-spacing:.15em;font-size:1.25rem;text-align:center}textarea.form-input{min-height:100px;resize:vertical}.alert{padding:1rem 1.25rem;border-radius:var(--radius);font-size:.9rem;font-weight:500;margin-bottom:1rem}.alert--success{background:var(--success-bg);color:#0e6027;border:1px solid #a7f0ba}.alert--error{background:var(--error-bg);color:#750e13;border:1px solid #ffd7d9}.alert--info{background:var(--primary-light);color:#002d9c;border:1px solid #a6c8ff}.result-box{text-align:center;padding:2rem 1.5rem;border-radius:var(--radius-lg);margin-bottom:1.5rem}.result-box--success{background:var(--success-bg);border:2px solid var(--success)}.result-box--error{background:var(--error-bg);border:2px solid var(--error)}.result-icon{font-size:3rem;margin-bottom:.75rem;line-height:1}.result-amount{font-family:var(--font-mono);font-size:2rem;font-weight:600;margin-bottom:.25rem}.result-message{font-size:.95rem;color:var(--text-secondary)}.login-container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:80dvh}.login-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:2.5rem 2rem;width:100%;max-width:400px}.login-logo{font-weight:700;font-size:1.5rem;color:var(--primary);text-align:center;margin-bottom:.5rem}.login-tagline{text-align:center;font-size:.875rem;color:var(--text-secondary);margin-bottom:2rem}.offer-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:1.5rem;margin-bottom:1.5rem}.offer-title{font-weight:600;font-size:1.125rem;margin-bottom:.5rem}.offer-description{font-size:.95rem;color:var(--text-secondary);line-height:1.6}.offer-image{width:100%;max-height:200px;object-fit:cover;border-radius:var(--radius);margin-bottom:1rem}.scan-cta{display:flex;align-items:center;justify-content:center;gap:.75rem;width:100%;padding:1.5rem 2rem;font-size:1.25rem;font-weight:600;border-radius:var(--radius-lg);min-height:64px;box-shadow:var(--shadow)}.scan-cta svg{width:1.5rem;height:1.5rem;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.divider{border:none;border-top:1px solid var(--border);margin:1.5rem 0}.text-center{text-align:center}.text-muted{color:var(--text-secondary)}.text-mono{font-family:var(--font-mono)}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.gap-row{display:flex;flex-wrap:wrap;gap:.75rem}.spinner{display:inline-block;width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:480px){#app{padding:1rem}.login-box{padding:2rem 1.25rem}.card-grid{grid-template-columns:1fr}}@media(min-width:768px){#app{padding:2rem}}