.tools-hub,.tool-page{padding-bottom:72px}.tools-intro{max-width:720px;margin-top:18px}.tool-categories{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-bottom:40px;display:grid}.tool-category{color:var(--muted);margin-bottom:14px;font-size:17px}.tool-hub-card{border:1px solid var(--line);border-top:3px solid var(--blue);background:var(--surface);border-radius:4px;flex-direction:column;gap:14px;height:calc(100% - 44px);padding:28px;display:flex}.tool-hub-card:hover{border-color:var(--blue);background:var(--soft)}.tool-hub-card h3{font-size:23px}.tool-index{color:var(--blue);font-size:17px}.tool-hub-card .text-link{margin-top:auto;padding-top:12px}.tool-english{text-align:start;letter-spacing:.2px;font-family:Arial,sans-serif;font-size:15px}.tool-page{max-width:1050px}.tool-heading{margin-block:30px 36px}.tool-heading h1{letter-spacing:-.5px;font-size:clamp(29px,3.4vw,42px)}.tool-heading>p{max-width:800px;margin-top:14px}.tool-heading .eyebrow{margin:0 0 10px}.tool-privacy{color:var(--blue);font-size:14px}.calculator{border:1px solid var(--line);border-top:3px solid var(--blue);background:var(--surface);border-radius:5px;padding:clamp(20px,4vw,40px)}.calculator h2,.tool-explanation h2,.tool-related h2{letter-spacing:0;margin-bottom:16px;font-size:clamp(23px,2.4vw,29px)}.tool-fields{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-block:24px;display:grid}.two-fields{grid-template-columns:repeat(2,minmax(0,1fr))}.tool-field{flex-direction:column;gap:8px;min-width:0;font-size:16px;display:flex}.tool-field>span{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px;display:flex}.field-unit{color:var(--muted);font-family:Arial,sans-serif;font-size:14px}.tool-field input,.tool-field select{border:1px solid var(--field-border);width:100%;min-width:0;min-height:49px;font:inherit;background:var(--surface);color:var(--ink);border-radius:3px;padding:10px 12px}.tool-field input{text-align:left;font-family:Tahoma,Arial,sans-serif}.tool-field input::placeholder{color:#70787c;opacity:1}.tool-field input:focus-visible,.tool-field select:focus-visible,.tool-checkbox input:focus-visible{outline:3px solid var(--blue);outline-offset:3px}.field-hint{font-size:15px}.tool-actions{flex-wrap:wrap;align-items:center;gap:12px;margin-top:28px;display:flex}.tool-actions .text-link{background:0 0;border:0;padding:10px}.tool-results{border-top:1px solid var(--line);margin-top:32px;padding-top:28px}.result-number{font-variant-numeric:tabular-nums;color:var(--blue);overflow-wrap:anywhere;font-family:Arial,sans-serif;font-size:clamp(25px,4vw,36px);line-height:1.5;display:block}.result-number>span{color:var(--muted);font-size:.56em}.shaft-result{flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:24px;display:flex}.frequency-results{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.frequency-card,.correction-card{background:var(--soft);border:1px solid var(--line);border-radius:3px;padding:22px}.frequency-card h3{text-align:right;margin-bottom:10px;font-family:Arial,sans-serif}.frequency-card p{margin-top:12px;font-size:15px}.tool-note,.tool-conventions{background:var(--soft);border-inline-start:3px solid var(--blue);margin-block:24px;padding:20px 24px;font-size:16px}.tool-note p,.tool-conventions p{margin-block:10px}.tool-error,.tool-warning{border-inline-start:3px solid;border-radius:3px;margin-top:20px;padding:14px 18px}.tool-error{color:#8e221c;background:#fff2f0}.tool-warning{color:#72500a;background:#fff8e7}.tool-mode{flex-wrap:wrap;gap:10px;margin-block:10px 24px;display:flex}.tool-mode button{border:1px solid var(--line);background:var(--surface);min-height:46px;color:var(--ink);border-radius:3px;padding:10px 18px}.tool-mode button[aria-pressed=true]{background:var(--blue);border-color:var(--blue);color:#fff}.tool-step{border:1px solid var(--line);border-radius:3px;min-width:0;margin:24px 0;padding:20px 24px}.tool-step legend{padding-inline:8px;font-size:18px;font-weight:700}.vector-input{border-top:1px solid var(--line);margin-top:16px;padding-top:12px}.vector-input h4{color:var(--muted);margin:0;font-weight:500}.tool-checkbox{cursor:pointer;align-items:flex-start;gap:12px;padding-block:10px;display:flex}.tool-checkbox input{width:20px;height:20px;accent-color:var(--blue);flex-shrink:0;margin-top:6px}.tool-conventions summary{cursor:pointer;min-height:38px;font-weight:700}.tool-conventions .tool-field{max-width:540px;margin-block:20px}.correction-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-block:24px;display:grid}.correction-polar{width:230px;max-width:100%;color:var(--ink);margin:12px auto 0;display:block}.matrix-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-block:20px;font-family:Arial,sans-serif;font-size:16px;display:grid}.matrix-grid>div,.matrix-line{overflow-wrap:anywhere;background:var(--soft);padding:10px}.tool-explanation{border-bottom:1px solid var(--line);padding-block:40px}.tool-explanation>p{margin-block:16px}.tool-explanation a,.tool-related a{color:var(--blue);text-underline-offset:5px;text-decoration:underline}.tool-formulas{background:var(--soft);text-align:left;overflow-wrap:anywhere;border-radius:3px;padding:20px;font:17px/2 Arial,sans-serif}.tool-formulas p{color:var(--ink);margin-block:6px}.tool-related{padding-top:32px}.tool-related>div{flex-wrap:wrap;gap:18px 30px;display:flex}@media (max-width:900px){.tool-categories{grid-template-columns:1fr}.tool-hub-card{height:auto}.tool-fields{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:550px){.tool-fields,.frequency-results,.correction-grid,.matrix-grid{grid-template-columns:1fr}.calculator{padding:20px 16px}.tool-step{padding:16px 12px}.tool-note,.tool-conventions{padding:16px}.tool-actions .button{flex:auto}.tool-mode button{flex:1;padding-inline:12px}.tool-conventions select{font-size:15px}.tool-heading .tool-privacy{font-size:14px}.tool-formulas{padding:16px;font-size:16px}}