:root{--et-accent:#1769ff;--et-accent-2:#7048e8;--et-bg:#f6f8fc;--et-surface:#fff;--et-surface-2:#f8fafc;--et-text:#172033;--et-muted:#667085;--et-border:#e4e7ec;--et-soft:#edf3ff;--et-radius:20px;--et-shadow:0 12px 35px rgba(16,24,40,.07)}
html{scroll-behavior:smooth}body{background:var(--et-bg);color:var(--et-text);min-height:100vh}.container{max-width:1160px}
.site-header{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--et-surface) 94%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--et-border)}.site-header nav{min-height:64px}.brand{display:inline-flex;align-items:center;gap:.55rem;font-weight:850;letter-spacing:-.035em;color:var(--et-text);text-decoration:none;font-size:1.05rem}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:linear-gradient(135deg,var(--et-accent),var(--et-accent-2));color:#fff;font-size:.72rem;box-shadow:0 5px 14px rgba(23,105,255,.25)}
.site-nav{display:flex;gap:.3rem;align-items:center}.site-nav a{font-size:.9rem;border-radius:10px;padding:.45rem .7rem}.site-nav a:hover{background:var(--et-soft)}
.hero{padding:clamp(2.5rem,7vw,5.5rem) 1rem 2rem;text-align:center}.hero h1{font-size:clamp(2.5rem,7vw,4.8rem);letter-spacing:-.065em;line-height:.98;margin-bottom:.65rem}.lead{color:var(--et-muted)}.hero .lead{max-width:700px;margin:.4rem auto 1.6rem;font-size:clamp(1rem,2vw,1.2rem)}
.search-wrap{position:relative;max-width:800px;margin:0 auto}.search-box{position:relative}.search-box input{height:58px;padding-left:3.1rem;padding-right:3rem;border-radius:17px;border:1px solid #cfd5df;background:var(--et-surface);box-shadow:0 12px 32px rgba(16,24,40,.09);font-size:1.05rem}.search-icon{position:absolute;left:1rem;top:50%;transform:translateY(-50%);color:var(--et-muted);font-size:1.15rem}.search-kbd{position:absolute;right:.7rem;top:50%;transform:translateY(-50%);font-size:.72rem;color:var(--et-muted);border:1px solid var(--et-border);border-radius:7px;padding:.15rem .35rem;background:var(--et-surface-2)}
.search-results{position:absolute;left:0;right:0;top:calc(100% + .55rem);background:var(--et-surface);border:1px solid var(--et-border);border-radius:16px;box-shadow:0 20px 50px rgba(16,24,40,.15);overflow:hidden;text-align:left;display:none;z-index:200}.search-result{display:grid;grid-template-columns:2.25rem 1fr auto;gap:.7rem;align-items:center;padding:.8rem .95rem;text-decoration:none;border-bottom:1px solid var(--et-border);color:var(--et-text)}.search-result:last-child{border-bottom:0}.search-result:hover,.search-result.active{background:var(--et-soft)}.result-icon{display:grid;place-items:center;width:2.1rem;height:2.1rem;border-radius:10px;background:var(--et-soft);color:var(--et-accent);font-size:.85rem;font-weight:800}.result-copy strong,.result-copy small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.result-copy small{margin-top:.12rem;color:var(--et-muted);font-size:.78rem}.result-cat{font-size:.68rem;color:var(--et-muted);white-space:nowrap}
.section-title{display:flex;align-items:end;justify-content:space-between;gap:1rem;margin:2.8rem 0 1rem}.section-title h2{margin:0;letter-spacing:-.03em}.section-title a{font-size:.88rem}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem}.tool-card,.discover-card,.intent-card,.tool-panel,.info-card{background:var(--et-surface);border:1px solid var(--et-border);border-radius:var(--et-radius);box-shadow:var(--et-shadow)}.tool-card{height:100%;padding:1.15rem;transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease}.tool-card:hover{transform:translateY(-3px);box-shadow:0 18px 38px rgba(16,24,40,.1);border-color:#cbd5e1}.tool-card h3{margin:.75rem 0 .3rem;font-size:1.02rem}.tool-card p{font-size:.86rem;color:var(--et-muted);min-height:2.6em;margin-bottom:1rem}.tool-card a{font-size:.82rem;font-weight:700}.tool-icon{display:grid;place-items:center;width:2.55rem;height:2.55rem;border-radius:12px;background:var(--et-soft);color:var(--et-accent);font-weight:800}
.intent-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.intent-card{display:flex;align-items:center;gap:.75rem;padding:1rem;text-decoration:none;color:var(--et-text);min-height:74px;transition:transform .15s ease,background .15s ease}.intent-card:hover{transform:translateY(-2px);background:#fafdff}.intent-icon{font-size:1.2rem;width:2rem;text-align:center}.intent-card strong{display:block;font-size:.92rem}.intent-card small{display:block;color:var(--et-muted);margin-top:.1rem}
.discover-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.discover-card{padding:1.2rem}.discover-card h3{margin:.15rem 0 .35rem}.discover-card p{color:var(--et-muted);font-size:.9rem}.discover-card .arrow{font-weight:700;font-size:.85rem}
.ad-slot{min-height:92px;border:1px dashed #c9d2df;border-radius:16px;display:grid;place-items:center;color:#98a2b3;font-size:.72rem;letter-spacing:.04em;text-transform:uppercase;margin:1.3rem 0;background:rgba(255,255,255,.45)}.ad-slot[data-ad='internal']{min-height:72px;text-transform:none;font-size:.85rem}.ad-slot[hidden]{display:none}
.tool-hero{padding:2.2rem 0 1rem}.breadcrumbs{font-size:.8rem;color:var(--et-muted);margin-bottom:1rem}.tag{display:inline-flex;padding:.3rem .65rem;border-radius:999px;background:var(--et-soft);color:var(--et-accent);font-size:.74rem;font-weight:750}.tool-hero h1{font-size:clamp(2rem,5vw,3.4rem);letter-spacing:-.05em;margin:.65rem 0 .35rem}.tool-hero .lead{max-width:760px}.tool-panel{padding:1rem}.tool-toolbar{display:flex;justify-content:space-between;align-items:center;gap:.75rem;margin-bottom:.8rem}.tool-toolbar strong{font-size:.9rem}.tool-actions{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.7rem}.tool-actions button{margin:0}.tool-input{min-height:220px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;border-radius:14px}.output{white-space:pre-wrap;overflow-wrap:anywhere;min-height:140px;background:var(--et-surface-2);border:1px solid var(--et-border);border-radius:14px;padding:1rem;font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.output:empty:before{content:'Your result will appear here.';color:#98a2b3}.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:.75rem;margin:.9rem 0}.stat{padding:.9rem;border:1px solid var(--et-border);border-radius:14px;background:var(--et-surface-2)}.stat small,.stat strong{display:block}.stat small{color:var(--et-muted)}.stat strong{font-size:1.35rem;margin-top:.2rem}.file-row{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;margin:.75rem 0}.file-row input{max-width:100%}.tool-note{font-size:.78rem;color:var(--et-muted);margin:.7rem 0 0}.tool-content{margin-top:1.3rem}.info-card{padding:1.25rem;margin:1rem 0}.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.75rem}.related-grid a{padding:.85rem;border:1px solid var(--et-border);border-radius:13px;background:var(--et-surface);text-decoration:none}.related-grid strong,.related-grid small{display:block}.related-grid small{color:var(--et-muted);margin-top:.15rem}
.page-intro{padding:2.4rem 0 1rem}.page-intro h1{font-size:clamp(2rem,5vw,3.4rem);letter-spacing:-.05em;margin-bottom:.35rem}.category-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.category-card{padding:1.25rem;background:var(--et-surface);border:1px solid var(--et-border);border-radius:var(--et-radius);text-decoration:none;color:var(--et-text);box-shadow:var(--et-shadow)}.category-card h2{margin:.3rem 0;font-size:1.15rem}.category-card p{color:var(--et-muted);font-size:.87rem}.category-count{font-size:.74rem;color:var(--et-accent);font-weight:700}
.tool-directory{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.75rem}.directory-item{display:flex;gap:.75rem;align-items:center;padding:.9rem;border:1px solid var(--et-border);border-radius:14px;background:var(--et-surface);text-decoration:none;color:var(--et-text)}.directory-item:hover{background:var(--et-soft)}.directory-item strong,.directory-item small{display:block}.directory-item small{color:var(--et-muted);font-size:.76rem;margin-top:.1rem}
footer{margin-top:5rem;padding:2.5rem 0;border-top:1px solid var(--et-border);color:var(--et-muted)}footer strong{color:var(--et-text)}
body.et-dark{--et-bg:#0d1117;--et-surface:#151b23;--et-surface-2:#111821;--et-text:#edf2f7;--et-muted:#aab4c2;--et-border:#2b3440;--et-soft:#172a49}.et-dark .search-box input,.et-dark .search-results,.et-dark .ad-slot{background:var(--et-surface)}.et-dark .search-kbd{background:var(--et-surface)}
@media(max-width:900px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.intent-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.category-grid,.tool-directory{grid-template-columns:repeat(2,minmax(0,1fr))}.discover-grid{grid-template-columns:1fr}}
@media(max-width:620px){.site-header nav{padding-inline:.7rem}.site-nav a{font-size:.78rem;padding:.4rem .5rem}.site-nav a:nth-child(2){display:none}.hero{padding-top:2.3rem}.hero h1{font-size:2.65rem}.search-box input{height:54px}.search-kbd{display:none}.grid,.intent-grid,.category-grid,.tool-directory,.related-grid{grid-template-columns:1fr 1fr}.tool-card p{min-height:0}.intent-card{min-height:68px;padding:.8rem}.intent-card small{display:none}.search-result{grid-template-columns:2rem 1fr}.result-cat{display:none}.tool-hero{padding-top:1.5rem}.tool-actions button{flex:1 1 auto}.tool-toolbar{align-items:flex-start;flex-direction:column}.section-title{margin-top:2rem}}
@media(max-width:430px){.grid,.intent-grid,.category-grid,.tool-directory,.related-grid{grid-template-columns:1fr}.brand{font-size:.98rem}.hero h1{font-size:2.4rem}}

.section-subtitle{margin:.2rem 0 0;color:var(--et-muted);font-size:.82rem}.confidence-pill{font-size:.72rem;padding:.35rem .6rem;border-radius:999px;background:var(--et-soft);color:var(--et-accent);font-weight:750}.learning-card{display:grid;gap:.3rem;padding:1rem 1.15rem;margin:1.25rem 0;background:var(--et-soft);border:1px solid var(--et-border);border-radius:16px}.learning-card strong{font-size:.92rem}.learning-card small{color:var(--et-muted)}.learning-card a{font-size:.8rem;font-weight:700}.learning-status{display:flex;align-items:center;gap:.7rem;flex-wrap:wrap;padding:.85rem 1rem;border:1px solid var(--et-border);background:var(--et-surface);border-radius:15px;box-shadow:var(--et-shadow);margin-top:1rem}.learning-status strong{margin-right:auto}.learning-status span{color:var(--et-muted);font-size:.82rem}.learning-status button{margin:0;padding:.35rem .65rem;font-size:.75rem}.recommendation-card{position:relative}.recommendation-card span{font-size:.82rem;font-weight:750}

/* v1.4 visual refinement */
:root{--et-header-height:72px;--et-footer-bg:#111827;--et-footer-text:#d8dee9;--et-footer-muted:#9aa6b5}
.site-header{background:color-mix(in srgb,var(--et-surface) 97%,transparent);box-shadow:0 1px 0 rgba(16,24,40,.03)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;width:100%;min-height:72px}
.brand{font-size:1.12rem}.brand-mark{width:38px;height:38px;border-radius:12px}
.site-nav{flex-wrap:wrap;justify-content:flex-end}.site-nav a{font-weight:650}
.header-search-link{display:none}
.tool-shell{background:var(--et-surface);border:1px solid var(--et-border);border-radius:24px;box-shadow:var(--et-shadow);padding:1.1rem;margin:1rem 0 1.5rem}
.tool-shell .tool-panel{border:0;box-shadow:none;padding:.25rem}
.tool-hero{padding:1.6rem 0 .6rem}.tool-hero h1{margin-top:.55rem}
.tool-actions{display:flex;gap:.55rem;flex-wrap:wrap;margin-top:1rem}.tool-actions button{margin:0}
.file-row{margin-top:.9rem;padding:.7rem .85rem;border:1px dashed var(--et-border);border-radius:14px;background:var(--et-surface-2)}
.file-row[hidden]{display:none}.file-row label{display:block;font-size:.8rem;font-weight:700;margin-bottom:.35rem;color:var(--et-muted)}
.tool-fields .grid{margin-bottom:.25rem}.tool-fields label{font-weight:700}.tool-fields input,.tool-fields select{margin-top:.35rem}
.control-hint{display:block;color:var(--et-muted);font-size:.76rem;margin-top:.3rem}
footer{margin-top:6rem;padding:0;background:var(--et-footer-bg);color:var(--et-footer-text);border-top:0}
.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:2rem;padding:3rem 0}
.footer-brand{font-size:1.1rem;font-weight:850;color:#fff;margin-bottom:.45rem}.footer-tagline{color:var(--et-footer-muted);max-width:360px}
.footer-col h3{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:#fff;margin:0 0 .65rem}.footer-col a{display:block;color:var(--et-footer-muted);text-decoration:none;padding:.18rem 0;font-size:.86rem}.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:1rem 0;color:var(--et-footer-muted);font-size:.75rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.category-preview-note{color:var(--et-muted);font-size:.85rem;margin-top:.6rem}.view-all-button{margin-top:1.2rem}
@media(max-width:760px){.site-nav a:nth-child(2){display:none}.footer-inner{grid-template-columns:1fr 1fr}.header-inner{min-height:64px}.site-header nav{min-height:64px}}
@media(max-width:520px){.footer-inner{grid-template-columns:1fr}.tool-shell{border-radius:18px;padding:.7rem}.tool-actions button{flex:1 1 calc(50% - .55rem)}.brand{font-size:1rem}.brand-mark{width:34px;height:34px}}