.i2b{--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-primary-ring: #3b82f6;--color-primary-tint: #eff6ff;--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}.i2b *{box-sizing:border-box}.i2b-container{max-width:72rem;margin-inline:auto;padding-inline:1rem;padding-bottom:1rem}@media (min-width: 640px){.i2b-container{padding-inline:1.5rem}}@media (min-width: 1024px){.i2b-container{padding-inline:2rem}}.i2b .card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:1.5rem}.i2b .card--raised{box-shadow:var(--shadow-raised)}.i2b .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}.i2b .btn:hover:not(:disabled){background:var(--color-primary-hover)}.i2b .btn:focus-visible{outline:2px solid var(--color-primary-ring);outline-offset:2px}.i2b .btn:disabled{opacity:.55;cursor:not-allowed}.i2b .btn--full{width:100%}.i2b .btn--sm{padding:.4rem .85rem;font-size:.85rem}.i2b .btn--ghost{background:var(--color-surface);color:var(--color-text-body);border:1px solid var(--color-border-input)}.i2b .btn--ghost:hover:not(:disabled){background:var(--color-surface-muted)}.i2b label.field{display:block;font-size:.875rem;font-weight:500;color:var(--color-text-body);margin-bottom:.35rem}.i2b .input{width:100%;padding:.55rem .75rem;border:1px solid var(--color-border-input);border-radius:var(--radius-input);background:var(--color-surface);color:var(--color-text-heading);font-size:1rem;font-family:inherit}.i2b .input:focus{outline:2px solid var(--color-primary-ring);outline-offset:1px;border-color:var(--color-primary-ring)}.i2b h2.section{font-size:1.5rem;font-weight:700;color:var(--color-text-heading);letter-spacing:-.01em;margin:0}.i2b h3.panel{font-size:1.125rem;font-weight:600;color:var(--color-text-heading);margin:0 0 1.1rem}.i2b .muted{color:var(--color-text-muted)}.i2b code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em;background:var(--color-surface-placeholder);padding:.1em .35em;border-radius:.3rem}.i2b .tabs{display:inline-flex;gap:.25rem;margin:2rem auto 0;padding:.3rem;background:var(--color-surface-muted);border:1px solid var(--color-border);border-radius:999px}.i2b .tab{border:0;background:transparent;cursor:pointer;padding:.5rem 1.1rem;border-radius:999px;font-size:.9rem;font-weight:600;color:var(--color-text-secondary);transition:.15s}.i2b .tab:hover{color:var(--color-text-heading)}.i2b .tab.is-active{background:var(--color-surface);color:var(--color-primary);box-shadow:var(--shadow-card)}.i2b .tab:focus-visible{outline:2px solid var(--color-primary-ring);outline-offset:2px}.i2b #panelEncode,.i2b #panelDecode{display:block}.i2b .tabs{display:flex;width:max-content}.i2b .layout{display:grid;grid-template-columns:1fr;gap:1.5rem;margin-top:1.5rem}@media (min-width: 920px){.i2b .layout{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);align-items:start}.i2b .side-card{position:sticky;top:1.5rem}}.i2b .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}.i2b .dropzone:hover,.i2b .dropzone.is-drag{border-color:var(--color-primary-ring);background:var(--color-primary-tint)}.i2b .dropzone.is-drag{border-style:solid}.i2b .dropzone:focus-visible{outline:2px solid var(--color-primary-ring);outline-offset:2px}.i2b .dropzone__icon{width:56px;height:56px;margin:0 auto .9rem;color:var(--color-primary)}.i2b .dropzone__icon svg{width:100%;height:100%;display:block}.i2b .dropzone__title{font-weight:700;font-size:1.15rem;color:var(--color-text-heading)}.i2b .dropzone__sub{font-size:.92rem;color:var(--color-text-muted);margin-top:.35rem}.i2b .dropzone__formats{display:inline-flex;flex-wrap:wrap;gap:.35rem;justify-content:center;margin-top:1rem}.i2b .fmt-chip{font-size:.7rem;font-weight:700;letter-spacing:.03em;padding:.18rem .5rem;border-radius:999px;background:var(--color-surface);border:1px solid var(--color-border);color:var(--color-text-muted)}.i2b .preview{display:flex;gap:1rem;align-items:center;margin-top:1.25rem}.i2b .preview__img{width:96px;height:96px;object-fit:contain;flex:0 0 auto;border:1px solid var(--color-border);border-radius:var(--radius-input);background:var(--color-surface-placeholder);padding:.35rem}.i2b .preview__meta{min-width:0}.i2b .preview__name{font-weight:600;color:var(--color-text-heading);word-break:break-all}.i2b .preview__sub{font-size:.85rem;color:var(--color-text-muted);margin:.2rem 0 .6rem}.i2b .out-block{margin-bottom:1.15rem}.i2b .out-block:last-child{margin-bottom:0}.i2b .out-head{display:flex;align-items:center;justify-content:space-between;gap:.75rem;margin-bottom:.4rem}.i2b .out-area{width:100%;min-height:64px;resize:vertical;padding:.65rem .75rem;border:1px solid var(--color-border-input);border-radius:var(--radius-input);background:var(--color-surface-muted);color:var(--color-text-heading);font-size:.82rem;line-height:1.5;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;word-break:break-all}.i2b .out-area--tall{min-height:120px}.i2b .out-area:focus{outline:2px solid var(--color-primary-ring);outline-offset:1px}.i2b .editor-head{display:flex;align-items:center;justify-content:space-between;gap:.75rem;margin-bottom:.6rem;flex-wrap:wrap}.i2b .editor{width:100%;min-height:320px;resize:vertical;padding:1rem 1.1rem;border:1px solid var(--color-border-input);border-radius:var(--radius-input);background:var(--color-surface);color:var(--color-text-heading);font-size:.9rem;line-height:1.6;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;word-break:break-all}.i2b .editor:focus{outline:2px solid var(--color-primary-ring);outline-offset:1px;border-color:var(--color-primary-ring)}.i2b .editor::placeholder{color:#9ca3af}.i2b .editor-hint{margin:.75rem 0 0;font-size:.85rem;color:var(--color-text-muted)}.i2b .field-group{margin:1.1rem 0}.i2b .decode-preview{display:flex;align-items:center;justify-content:center;min-height:160px;padding:1rem;margin-bottom:1rem;border:1px solid var(--color-border);border-radius:var(--radius-input);background:var(--color-surface-muted)}.i2b .decode-preview .preview__img{width:auto;height:auto;max-width:100%;max-height:220px}.i2b .decode-empty{color:var(--color-text-muted);font-size:.9rem}.i2b .gen-note{margin-top:.9rem;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}.i2b .gen-note--warn{background:#fffbeb;color:#b45309;border-color:#fde68a}.i2b .results-row{margin-top:1.5rem}.i2b .tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem;background:var(--color-surface-muted);border-radius:var(--radius-input);padding:1.25rem;border:1px solid var(--color-border)}.i2b .tile__label{font-size:.82rem;color:var(--color-text-muted)}.i2b .tile__value{font-size:1.35rem;font-weight:700;color:var(--color-text-heading);margin-top:.15rem;font-variant-numeric:tabular-nums}.i2b .tile__value--primary{color:var(--color-primary)}@media (max-width: 560px){.i2b .tiles{grid-template-columns:1fr;gap:.75rem}}.i2b .how{margin-top:3.25rem}.i2b .how h2.section{text-align:center}.i2b .how__lead{text-align:center;color:var(--color-text-secondary);margin:.4rem 0 1.75rem}.i2b .steps{display:grid;grid-template-columns:1fr;gap:1.1rem}@media (min-width: 720px){.i2b .steps{grid-template-columns:repeat(3,1fr)}}.i2b .step{text-align:center;padding:1.75rem 1.25rem}.i2b .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}.i2b .step h3{font-size:1.05rem;font-weight:700;color:var(--color-text-heading);margin:0 0 .4rem}.i2b .step p{margin:0;font-size:.9rem;color:var(--color-text-secondary)}.i2b .about{margin-top:2rem;max-width:52rem;margin-inline:auto}.i2b .about h3{font-size:1.2rem;font-weight:700;color:var(--color-text-heading);margin:0 0 .75rem}.i2b .about p{margin:0;color:var(--color-text-body);font-size:.98rem;line-height:1.65}.i2b .about strong{color:var(--color-text-heading)}.i2b .privacy-line{margin-top:1.75rem;display:flex;align-items:center;gap:1rem;background:#ecfdf5;border:1px solid #a7f3d0}.i2b .privacy-line__icon{font-size:1.5rem;flex:0 0 auto}.i2b .privacy-line strong{color:#065f46}.i2b .privacy-line p{margin:0;color:#047857;font-size:.95rem}.i2b .foot{margin:2.5rem 0 1rem;padding-top:1.25rem;border-top:1px solid var(--color-border);text-align:center}.i2b .foot p{margin:0;font-size:.85rem}