.fst{max-width:680px;margin:0 auto}.fst__step{background:#fff;border:1px solid var(--border-light);border-radius:.5rem;padding:1.5rem}.fst__step-title{font-family:var(--font-display);font-size:1.125rem;color:var(--deep-well);margin-bottom:.375rem}.fst__step-desc{font-size:.875rem;color:var(--light-slate);margin-bottom:1.25rem}.fst__contaminants{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1.5rem}.fst__contaminant{padding:.75rem;background:var(--lab-white);border:1px solid var(--border-light);border-radius:.375rem}.fst__checkbox-row{display:flex;align-items:center;gap:.625rem;font-size:.875rem;color:var(--slate-text);cursor:pointer}.fst__checkbox-row input[type=checkbox]{width:18px;height:18px;accent-color:var(--clean-stream)}.fst__number-row{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap}.fst__contaminant-label{font-size:.875rem;color:var(--slate-text)}.fst__number-input{display:flex;align-items:center;gap:.375rem}.fst__number-input input{width:100px;font-family:var(--font-mono);font-size:.875rem;padding:.375rem .5rem;border:1px solid var(--border-light);border-radius:.25rem}.fst__number-input input:focus{outline:none;border-color:var(--clean-stream)}.fst__unit{font-size:.75rem;color:var(--light-slate);font-family:var(--font-mono);min-width:30px}.fst__home-fields{display:flex;gap:1.5rem;margin-bottom:1.5rem;flex-wrap:wrap}.fst__field{flex:1;min-width:150px}.fst__field label{display:block;font-size:.8125rem;font-weight:600;color:var(--slate-text);margin-bottom:.375rem}.fst__field select{width:100%;font-family:var(--font-body);font-size:.875rem;padding:.5rem;border:1px solid var(--border-light);border-radius:.375rem;color:var(--slate-text)}.fst__btn{font-family:var(--font-body);font-size:.875rem;font-weight:600;padding:.625rem 1.5rem;border:none;border-radius:.5rem;background:var(--clean-stream);color:#fff;cursor:pointer}.fst__btn:hover{background:#246a7a}.fst__btn--secondary{background:#fff;color:var(--slate-text);border:1px solid var(--border-light)}.fst__btn--secondary:hover{background:var(--test-strip)}.fst__btn-row{display:flex;gap:.75rem;justify-content:space-between}.fst__chain{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1.5rem}.fst__system{display:flex;gap:1rem;padding:1rem;background:var(--lab-white);border:1px solid var(--border-light);border-radius:.5rem}.fst__system-order{flex-shrink:0;width:32px;height:32px;background:var(--clean-stream);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:.875rem;font-weight:700}.fst__system-content{flex:1}.fst__system-content h4{font-family:var(--font-display);font-size:1rem;color:var(--deep-well);margin-bottom:.25rem}.fst__system-removes{font-size:.8125rem;color:var(--slate-text);line-height:1.5;margin-bottom:.5rem}.fst__system-meta{display:flex;gap:1.5rem;font-size:.8125rem;color:var(--light-slate);margin-bottom:.375rem;flex-wrap:wrap}.fst__system-meta strong{color:var(--slate-text)}.fst__system-link{font-size:.8125rem;font-weight:600;color:var(--clean-stream);text-decoration:none}.fst__system-link:hover{text-decoration:underline}.fst__total{display:flex;justify-content:space-between;align-items:center;background:var(--test-strip);border:1px solid var(--border-light);border-radius:.5rem;padding:1rem 1.25rem;margin-bottom:1rem;font-size:.9375rem}.fst__total strong{font-family:var(--font-mono);color:var(--clean-stream);font-size:1.125rem}.fst__no-results{font-size:.9375rem;color:var(--safe-green);font-weight:600;text-align:center;padding:2rem 0}.tool-hero[data-astro-cid-24muesj3]{background:linear-gradient(135deg,var(--deep-well) 0%,#1E4A6E 50%,var(--clean-stream) 100%);padding:3.5rem 0 3rem;color:#fff}.tool-hero__kicker[data-astro-cid-24muesj3]{font-family:var(--font-body);font-size:.6875rem;font-weight:700;letter-spacing:2.5px;text-transform:uppercase;color:var(--fresh-spring);display:block;margin-bottom:.5rem}.tool-hero[data-astro-cid-24muesj3] h1[data-astro-cid-24muesj3]{color:#fff;margin-bottom:.75rem}.tool-hero__desc[data-astro-cid-24muesj3]{font-size:.9375rem;color:#ffffffd1;max-width:560px;line-height:1.65;margin-bottom:0}.how-to-list[data-astro-cid-24muesj3]{padding-left:1.25rem;margin-bottom:2rem}.how-to-list[data-astro-cid-24muesj3] li[data-astro-cid-24muesj3]{margin-bottom:.75rem;font-size:.9375rem;line-height:1.6}.faq-list[data-astro-cid-24muesj3]{display:flex;flex-direction:column;gap:.5rem}.faq-item[data-astro-cid-24muesj3]{border:1px solid var(--border-light);border-radius:.5rem;overflow:hidden}.faq-item__q[data-astro-cid-24muesj3]{font-family:var(--font-display);font-size:1rem;font-weight:600;color:var(--deep-well);padding:.875rem 1rem;cursor:pointer;list-style:none}.faq-item__q[data-astro-cid-24muesj3]::-webkit-details-marker{display:none}.faq-item__q[data-astro-cid-24muesj3]:before{content:"+";display:inline-block;width:1.25rem;font-family:var(--font-mono);color:var(--clean-stream);font-weight:600}.faq-item[data-astro-cid-24muesj3][open] .faq-item__q[data-astro-cid-24muesj3]:before{content:"−"}.faq-item__a[data-astro-cid-24muesj3]{padding:0 1rem 1rem 2.25rem;font-size:.875rem;line-height:1.6;color:var(--slate-text);margin:0}