.tool-hero{max-width:820px;margin:0 auto;padding-top:150px;text-align:left}@media(max-width:768px){.tool-hero{padding-top:110px}}.tool-hero h1{font-size:2.6rem;line-height:1.15;margin-bottom:14px}.tool-hero h1 span{color:var(--primary)}.tool-hero .lede{font-size:1.12rem;opacity:.82;line-height:1.6;max-width:720px}.calc-card{max-width:820px;margin:32px auto 8px;background:#fff;border:1px solid var(--border-soft);border-radius:20px;padding:28px;box-shadow:0 10px 40px #17171a0f}.calc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px}.calc-field label{display:block;font-size:.8rem;font-weight:600;opacity:.7;margin-bottom:6px}.calc-field input[type=number],.calc-field select{width:100%;padding:12px 14px;border:1px solid var(--border-soft);border-radius:12px;font:inherit;font-size:1.05rem;background:#fdfaf5;box-sizing:border-box}.calc-field input:focus,.calc-field select:focus{outline:2px solid var(--primary);outline-offset:1px}.unit-toggle{display:inline-flex;border:1px solid var(--border-soft);border-radius:10px;overflow:hidden}.unit-toggle button{padding:10px 18px;border:0;background:#fdfaf5;font:inherit;font-weight:600;cursor:pointer;opacity:.65}.unit-toggle button.active{background:var(--primary);color:#fff;opacity:1}.calc-result{margin-top:22px;padding:20px 22px;background:#fdfaf5;border-radius:14px}.calc-result .big{font-size:2.4rem;font-weight:800;color:var(--primary);line-height:1.1}.calc-result .sub{font-size:.92rem;opacity:.7;margin-top:4px}.tool-table-wrap{overflow-x:auto;margin-top:20px}.tool-table{width:100%;border-collapse:collapse;font-size:.95rem}.tool-table th,.tool-table td{border:1px solid var(--border-soft);padding:10px 14px;text-align:left}.tool-table thead th{background:#fdfaf5;font-weight:700}.tool-table tr.hl td{background:#ff6f3914;font-weight:600}.tool-prose{max-width:820px;margin:0 auto;padding-top:48px}.tool-prose h2{font-size:1.9rem;margin-bottom:14px}.tool-prose p{font-size:1.06rem;opacity:.82;line-height:1.65;margin-bottom:14px}.tool-prose ul{font-size:1.02rem;opacity:.85;line-height:1.7;padding-left:22px}.tool-prose .formula{background:#17171a;color:#d6e61f;border-radius:12px;padding:14px 18px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.98rem;overflow-x:auto;margin:10px 0 18px}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px;margin:40px auto 60px;max-width:1000px}.tool-card{display:block;background:#fff;border:1px solid var(--border-soft);border-radius:18px;padding:24px;text-decoration:none;color:inherit;transition:transform .15s ease,box-shadow .15s ease}.tool-card:hover{transform:translateY(-3px);box-shadow:0 14px 40px #17171a14}.tool-card .tool-icon{font-size:1.7rem}.tool-card h3{margin:10px 0 6px;font-size:1.12rem}.tool-card p{font-size:.9rem;opacity:.72;line-height:1.5;margin:0}.tool-crosslinks{max-width:820px;margin:30px auto 0;font-size:.95rem;opacity:.85}.tool-crosslinks a{color:var(--primary);font-weight:600}.bar-vis{display:flex;align-items:center;justify-content:center;gap:2px;min-height:130px;margin:18px 0 4px}.bar-sleeve{width:54px;height:11px;background:linear-gradient(#c9ccd2,#9aa0a8);border-radius:2px}.bar-collar{width:9px;height:26px;background:#6b7076;border-radius:2px}.bar-plate{width:15px;border-radius:3px;display:flex;align-items:center;justify-content:center;font-size:.58rem;font-weight:800;color:#fff;writing-mode:vertical-rl;text-orientation:mixed;border:1px solid rgba(0,0,0,.18);letter-spacing:-.02em}.bar-empty{font-size:.9rem;opacity:.5;padding:0 12px}.bar-vis-caption{text-align:center;font-size:.8rem;opacity:.55;margin-bottom:6px}.plate-stock{display:flex;flex-wrap:wrap;gap:12px}.plate-stock label{display:inline-flex;align-items:center;gap:6px;font-size:.92rem;cursor:pointer}.plate-stock select{padding:5px 8px;border:1px solid var(--border-soft);border-radius:8px;font:inherit;font-size:.85rem;background:#fdfaf5}.plate-swatch{width:12px;height:12px;border-radius:3px;border:1px solid rgba(0,0,0,.2);display:inline-block}.tool-nav{max-width:900px;margin:56px auto 0}.tool-nav-title{display:block;font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;opacity:.45;margin-bottom:12px}.tool-nav ul{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px}.tool-nav a,.tool-nav-current{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:500px;font-size:.9rem;font-weight:600;border:1px solid var(--border-soft);text-decoration:none;white-space:nowrap}.tool-nav a{background:#fff;color:inherit;transition:border-color .15s ease,transform .15s ease}.tool-nav a:hover{border-color:var(--primary);transform:translateY(-1px)}.tool-nav-current{background:#fdfaf5;opacity:.5;cursor:default}.tool-nav-hub{border-style:dashed!important;color:var(--primary)!important}.src-caveat{border-left:3px solid var(--primary);padding-left:14px;font-size:.98rem!important;opacity:.75!important}.src-list{list-style:decimal;padding-left:22px;margin-top:18px}.src-list li{margin-bottom:16px;line-height:1.55}.src-cite{display:block;font-size:.95rem;opacity:.9}.src-cite a{color:var(--primary);font-weight:600}.src-cite em{opacity:.7;font-style:italic}.src-print{opacity:.55;font-style:normal}.src-used{display:block;font-size:.85rem;opacity:.6;margin-top:3px}.tool-note{font-size:.85rem;opacity:.6;margin-top:14px;line-height:1.5}@media(max-width:768px){.tool-hero h1{font-size:2rem}.calc-card{padding:20px}.calc-result .big{font-size:1.9rem}}