.tool-shell{--tool-accent:var(--th-color-primary);--tool-accent-hover:var(--th-color-primary-hover);--tool-border:var(--th-color-border);--tool-bg:var(--th-color-bg);--tool-bg-muted:var(--th-color-bg-muted);--tool-text:var(--th-color-text);--tool-text-muted:var(--th-color-text-muted);--tool-radius:0.75rem;--tool-shadow:0 1px 3px rgba(0,0,0,0.08);color:var(--tool-text);background:var(--tool-bg)}.tool-shell__container{max-width:72rem;margin:0 auto;padding:1.5rem 1rem 4rem}.tool-breadcrumb{margin-bottom:1.5rem}.tool-breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:.25rem;list-style:none;margin:0;padding:0;font-size:.875rem;color:var(--tool-text-muted)}.tool-breadcrumb__item a{color:var(--tool-text-muted);text-decoration:none}.tool-breadcrumb__item a:hover{color:var(--tool-accent)}.tool-breadcrumb__item--current{color:var(--tool-text);font-weight:500}.tool-breadcrumb__separator{-webkit-user-select:none;-moz-user-select:none;user-select:none}.tool-hero{margin-bottom:1rem}.tool-hero__title{font-size:2rem;font-weight:700;line-height:1.2;margin:0 0 .5rem}.tool-hero__summary{font-size:1.125rem;color:var(--tool-text-muted);margin:0 0 .75rem;line-height:1.6}.tool-hero__category{margin:0 0 .5rem;font-size:.875rem;color:var(--tool-text-muted)}.tool-hero__category-label{display:inline-block;padding:.2rem .6rem;border-radius:999px;background:var(--tool-surface-alt,rgba(0,0,0,.05))}.tool-seo-module__list--check{list-style:none;padding-left:0}.tool-seo-module__examples pre{background:var(--tool-surface-alt,rgba(0,0,0,.04));padding:1rem;border-radius:.5rem;overflow-x:auto;font-size:.875rem;line-height:1.5}.tool-seo-module__examples .tool-example{margin-bottom:1.5rem}.tool-seo-module__examples .tool-example__title{font-weight:600;margin:0 0 .5rem}.tool-intro{margin-bottom:2rem}.tool-intro__title{font-size:2rem;font-weight:700;line-height:1.2;margin:0 0 .75rem}.tool-intro__summary{font-size:1.125rem;color:var(--tool-text-muted);margin:0 0 1.5rem;line-height:1.6}.tool-intro__content{margin-bottom:1.5rem;line-height:1.7}.tool-intro__content,.tool-intro__content li,.tool-intro__content p{color:var(--tool-text)}.tool-intro__block{margin-top:1.5rem}.tool-intro__subtitle{font-size:1rem;font-weight:600;margin:0 0 .75rem}.tool-intro__list{margin:0;padding-left:1.25rem;line-height:1.8}.tool-intro__steps{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.75rem}.tool-intro__steps li{display:flex;align-items:flex-start;gap:.75rem}.tool-intro__step-num{flex-shrink:0;width:1.75rem;height:1.75rem;border-radius:50%;background:var(--tool-accent);color:#fff;font-size:.75rem;font-weight:600;display:flex;align-items:center;justify-content:center}.tool-workspace{margin-bottom:3rem}.tool-workspace__grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:1rem;gap:1rem}@media (max-width:768px){.tool-workspace__grid{grid-template-columns:1fr}}.tool-workspace__panel{border:1px solid var(--tool-border);border-radius:var(--tool-radius);background:var(--tool-bg);box-shadow:var(--tool-shadow);overflow:hidden}.tool-workspace__panel-header{padding:.75rem 1rem;background:var(--tool-bg-muted);border-bottom:1px solid var(--tool-border)}.tool-workspace__panel-title{font-size:.875rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--tool-text-muted);margin:0}.tool-workspace__panel-body{padding:1rem;min-height:12rem}.tool-workspace__actions{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1rem;padding-top:1rem;border-top:1px solid var(--tool-border)}.tool-section-title{font-size:1.375rem;font-weight:700;margin:0 0 1.25rem;padding-bottom:.75rem;border-bottom:2px solid var(--tool-border)}.tool-faq{margin-bottom:3rem}.tool-faq__list{display:flex;flex-direction:column;gap:1rem;margin:0}.tool-faq__item{border:1px solid var(--tool-border);border-radius:var(--tool-radius);padding:1rem 1.25rem;background:var(--tool-bg-muted)}.tool-faq__question{font-weight:600;margin:0 0 .5rem}.tool-faq__answer{margin:0;color:var(--tool-text-muted);line-height:1.7}.tool-related-articles{margin-bottom:3rem}.tool-related-articles__grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));grid-gap:1rem;gap:1rem;list-style:none;margin:0;padding:0}.tool-related-articles__card{border:1px solid var(--tool-border);border-radius:var(--tool-radius);overflow:hidden;transition:box-shadow .2s}.tool-related-articles__card:hover{box-shadow:0 4px 12px rgba(0,0,0,.1)}.tool-related-articles__link{display:block;text-decoration:none;color:inherit}.tool-related-articles__cover{width:100%;height:140px;object-fit:cover}.tool-related-articles__body{padding:1rem}.tool-related-articles__title{font-size:1rem;font-weight:600;margin:0 0 .5rem}.tool-related-articles__excerpt{font-size:.875rem;color:var(--tool-text-muted);margin:0 0 .75rem;line-height:1.5}.tool-related-articles__cta{font-size:.875rem;color:var(--tool-accent);font-weight:500}.tool-related-tools{margin-bottom:3rem}.tool-related-tools__grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));grid-gap:.75rem;gap:.75rem;list-style:none;margin:0;padding:0}.tool-related-tools__card{display:flex;align-items:flex-start;gap:.75rem;padding:1rem;border:1px solid var(--tool-border);border-radius:var(--tool-radius);text-decoration:none;color:inherit;transition:border-color .2s,background .2s}.tool-related-tools__card:hover{border-color:var(--tool-accent);background:var(--tool-bg-muted)}.tool-related-tools__icon{font-size:1.5rem;line-height:1}.tool-related-tools__name{font-size:.9375rem;font-weight:600;margin:0 0 .25rem}.tool-related-tools__desc{font-size:.8125rem;color:var(--tool-text-muted);margin:0;line-height:1.4}.tool-comments{margin-bottom:2rem}.tool-comments__form{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1.5rem}.tool-comments__input{width:100%;padding:.75rem 1rem;border:1px solid var(--tool-border);border-radius:var(--tool-radius);font-family:inherit;font-size:.9375rem;resize:vertical;background:var(--tool-bg);color:var(--tool-text)}.tool-comments__input:focus{outline:2px solid var(--tool-accent);outline-offset:2px}.tool-comments__submit{align-self:flex-start;padding:.5rem 1.25rem;background:var(--tool-accent);color:#fff;border:none;border-radius:var(--tool-radius);font-size:.875rem;font-weight:500;cursor:pointer}.tool-comments__submit:hover{background:var(--tool-accent-hover)}.tool-comments__submit:disabled{opacity:.6;cursor:not-allowed}.tool-comments__author{width:100%;max-width:16rem;padding:.5rem .75rem;border:1px solid var(--tool-border);border-radius:var(--tool-radius);font-family:inherit;font-size:.875rem;background:var(--tool-bg);color:var(--tool-text)}.tool-comments__author:focus{outline:2px solid var(--tool-accent);outline-offset:2px}.tool-comments__error{margin:0;font-size:.8125rem;color:#dc2626}.tool-comments__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.75rem}.tool-comments__empty{padding:1.5rem;text-align:center;color:var(--tool-text-muted);font-size:.875rem;background:var(--tool-bg-muted);border-radius:var(--tool-radius)}.tool-comments__item{padding:1rem 1.25rem;border:1px solid var(--tool-border);border-radius:var(--tool-radius);background:var(--tool-bg)}.tool-comments__meta{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 1rem;margin-bottom:.5rem}.tool-comments__author-name{font-size:.875rem;color:var(--tool-text)}.tool-comments__time{font-size:.75rem;color:var(--tool-text-muted)}.tool-comments__content{margin:0;font-size:.9375rem;line-height:1.6;white-space:pre-wrap;word-break:break-word}.tool-comments__placeholder{color:var(--tool-text-muted);font-size:.875rem}.tool-input-text,.tool-input-textarea{width:100%;padding:.75rem;border:1px solid var(--tool-border);border-radius:calc(var(--tool-radius) - 2px);font-family:inherit;font-size:.9375rem;line-height:1.5;resize:vertical;box-sizing:border-box;background:var(--tool-bg);color:var(--tool-text)}.tool-input-text:focus,.tool-input-textarea:focus{outline:2px solid var(--tool-accent);outline-offset:2px;border-color:transparent}.tool-result-output{width:100%;min-height:10rem;padding:.75rem;background:var(--tool-bg-muted);border:1px solid var(--tool-border);font-family:ui-monospace,monospace;line-height:1.6;white-space:pre-wrap;word-break:break-word;box-sizing:border-box}.tool-btn,.tool-result-output{border-radius:calc(var(--tool-radius) - 2px);font-size:.875rem;color:var(--tool-text)}.tool-btn{padding:.5rem 1rem;font-weight:500;cursor:pointer;border:1px solid var(--tool-border);background:var(--tool-bg)}.tool-btn:hover{background:var(--tool-bg-muted)}.tool-btn--primary{background:var(--tool-accent);color:#fff;border-color:var(--tool-accent)}.tool-btn--primary:hover{background:var(--tool-accent-hover)}.tool-seo-content{margin:2.5rem 0;padding-top:2rem;border-top:1px solid var(--tool-border)}.tool-seo-module{margin-bottom:2rem}.tool-seo-module__body{line-height:1.8;color:var(--tool-text)}.tool-seo-module__body li,.tool-seo-module__body p{color:var(--tool-text)}.tool-seo-module__body p{margin:0 0 1rem}.tool-seo-module__body h3{font-size:1.0625rem;font-weight:600;margin:1.25rem 0 .5rem;color:var(--tool-text)}.tool-seo-module__list{margin:.75rem 0 0;padding-left:1.5rem;line-height:1.8}.tool-seo-module__list--ordered{list-style:decimal}.tool-seo-module__list li{margin-bottom:.5rem}