:root{--tools-blue:#1f5eff;--tools-ink:#172033;--tools-muted:#5f6b7a;--tools-line:#dfe5ee;--tools-bg:#f6f8fb;--tools-card:#fff;--tools-radius:14px}.site-shell{width:min(1120px,calc(100% - 32px));margin-inline:auto}.site-header{border-bottom:1px solid var(--tools-line);background:#fff}.nav-shell{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:68px}.brand{font-weight:800;color:var(--tools-ink);text-decoration:none;font-size:1.12rem}.site-header nav{display:flex;gap:8px;flex-wrap:wrap}.site-header nav a{padding:8px 10px;border-radius:8px;color:var(--tools-ink);text-decoration:none}.site-header nav a:hover,.site-header nav a[aria-current=page]{color:var(--tools-blue);background:#eef3ff}.breadcrumbs{display:flex;gap:8px;align-items:center;flex-wrap:wrap;color:var(--tools-muted);font-size:.92rem;padding-top:24px}.breadcrumbs a{color:inherit}.tool-hero,.directory-hero{padding:44px 0 30px}.tool-hero h1,.directory-hero h1{font-size:clamp(2rem,5vw,3.25rem);line-height:1.08;margin:.25rem 0 1rem;color:var(--tools-ink)}.tool-hero>p:last-child,.directory-hero>p:last-child{max-width:760px;font-size:1.12rem;color:var(--tools-muted)}.eyebrow,.card-category,.video-type{text-transform:uppercase;letter-spacing:.09em;font-size:.76rem;font-weight:800;color:var(--tools-blue)}.calculator-card,.tool-content-section,.related-panel,.directory-controls,.tool-directory-card{background:var(--tools-card);border:1px solid var(--tools-line);border-radius:var(--tools-radius);box-shadow:0 6px 24px rgba(25,45,80,.05)}.calculator-card{padding:clamp(20px,4vw,34px);margin-bottom:28px}.calculator-card h2,.tool-content-section h2,.related-panel h2{margin-top:0;color:var(--tools-ink)}.tool-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.tool-field{display:grid;gap:7px;font-weight:700;color:var(--tools-ink)}.tool-field--wide{grid-column:1/-1}.tool-field input,.tool-field select,.tool-field textarea,.directory-controls input{box-sizing:border-box;width:100%;border:1px solid #bdc8d8;border-radius:9px;padding:12px 13px;font:inherit;color:var(--tools-ink);background:#fff}.tool-field input:focus,.tool-field select:focus,.tool-field textarea:focus,.directory-controls input:focus{outline:3px solid rgba(31,94,255,.16);border-color:var(--tools-blue)}.tool-actions{display:flex;gap:10px;margin-top:20px}.button{border:0;border-radius:9px;padding:11px 18px;font:inherit;font-weight:800;cursor:pointer}.button-primary{background:var(--tools-blue);color:#fff}.button-secondary{background:#edf1f6;color:var(--tools-ink)}.tool-result{margin-top:20px;padding:18px;border-radius:10px;background:#eef5ff;border-left:4px solid var(--tools-blue);overflow-wrap:anywhere}.tool-result.is-error{background:#fff1f1;border-color:#c92828;color:#871c1c}.tool-result strong{display:block;font-size:1.16rem}.tool-result dl{margin:.8rem 0 0;display:grid;gap:7px}.tool-result dl div{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(31,94,255,.13);padding-top:7px}.tool-result dt{color:var(--tools-muted)}.tool-result dd{margin:0;font-weight:700;text-align:right}.tool-result pre{white-space:pre-wrap;max-height:300px;overflow:auto}.qr-output{margin-top:20px}.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;align-items:start;gap:28px}.tool-content{display:grid;gap:22px}.tool-content-section{padding:clamp(20px,4vw,30px)}.tool-content-section p,.tool-content-section li{line-height:1.68;color:#37445a}.tool-content-section li+li{margin-top:8px}.formula-block{padding:15px 18px;border-radius:9px;background:#f1f4f8;border:1px solid var(--tools-line);overflow-x:auto;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:#18243a}.faq-list details{border-top:1px solid var(--tools-line);padding:13px 0}.faq-list details:last-child{border-bottom:1px solid var(--tools-line)}.faq-list summary{font-weight:800;cursor:pointer;color:var(--tools-ink)}.related-panel{padding:22px;position:sticky;top:18px}.related-panel ul{list-style:none;padding:0;margin:0;display:grid;gap:14px}.related-panel li{display:grid;gap:4px}.related-panel li a{font-weight:800;color:var(--tools-blue)}.related-panel li span{font-size:.86rem;line-height:1.4;color:var(--tools-muted)}.all-tools-link{display:inline-block;margin-top:20px;font-weight:800;color:var(--tools-blue)}.related-videos{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.related-videos article{padding:16px;border:1px solid var(--tools-line);border-radius:10px}.related-videos h3{font-size:1rem}.related-videos a{color:var(--tools-blue)}.muted{color:var(--tools-muted)}.site-footer{margin-top:48px;padding:28px 0;background:#111a2a;color:#dce3ee}.directory-controls{padding:20px;margin-bottom:24px}.directory-controls label{display:grid;gap:7px;font-weight:800;max-width:640px}.filter-buttons{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0 8px}.filter-buttons button{border:1px solid var(--tools-line);background:#fff;border-radius:999px;padding:8px 12px;cursor:pointer;color:var(--tools-ink)}.filter-buttons button.is-active{background:var(--tools-blue);border-color:var(--tools-blue);color:#fff}.tool-directory-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.tool-directory-card{padding:20px;display:flex;flex-direction:column}.tool-directory-card[hidden]{display:none}.tool-directory-card h2{font-size:1.15rem;margin:.25rem 0 .65rem}.tool-directory-card h2 a{color:var(--tools-ink);text-decoration:none}.tool-directory-card h2 a:hover{color:var(--tools-blue);text-decoration:underline}.tool-directory-card>p:not(.card-category){color:var(--tools-muted);line-height:1.55}.card-action{margin-top:auto;padding-top:12px;color:var(--tools-blue);font-weight:800}.no-results{padding:30px;text-align:center;color:var(--tools-muted)}@media(max-width:850px){.nav-shell{align-items:flex-start;flex-direction:column;padding:16px 0}.content-grid{grid-template-columns:1fr}.related-panel{position:static}.tool-directory-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.related-videos{grid-template-columns:1fr}}@media(max-width:560px){.site-shell{width:min(100% - 22px,1120px)}.site-header nav{display:grid;grid-template-columns:repeat(2,1fr);width:100%}.tool-fields,.tool-directory-grid{grid-template-columns:1fr}.tool-actions{flex-direction:column}.tool-result dl div{display:grid;gap:2px}.tool-result dd{text-align:left}.tool-hero,.directory-hero{padding:32px 0 22px}}