:root{--accent:#4f46e5;--ink:#172033;--muted:#687386;--line:#e8ebf2;--surface:#f7f8fc}*{box-sizing:border-box}body{color:var(--ink);font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif}.brand-mark{display:inline-grid;place-items:center;background:var(--accent);color:white;width:31px;height:31px;border-radius:10px;margin-right:5px}.hero{background:linear-gradient(135deg,#f6f7ff,#f7fbff);border:1px solid var(--line);border-radius:var(--card-radius,26px);padding:clamp(26px,5vw,58px)}.hero h1{font-size:clamp(2rem,4.4vw,3.4rem);font-weight:800;letter-spacing:-.055em}.hero p,.muted{color:var(--muted)}.search-wrap{max-width:680px;position:relative}.search-wrap input{border-radius:14px;padding:15px 18px 15px 48px}.search-icon{position:absolute;left:17px;top:15px;color:#8a92a3}.tool-card{height:100%;border:1px solid var(--line);border-radius:var(--card-radius,17px);padding:20px;transition:.18s;background:white;color:inherit;text-decoration:none;display:block}.tool-card:hover{transform:translateY(-3px);border-color:#c9c8ff;box-shadow:0 14px 35px #1c24400d;color:inherit}.tool-icon{display:grid;place-items:center;width:43px;height:43px;border-radius:13px;background:#f0efff;color:var(--accent);font-size:21px;margin-bottom:15px}.tool-card h3{font-size:1.03rem;font-weight:700}.tool-card p{font-size:.9rem;color:var(--muted);margin:0}.section-title{font-weight:800;letter-spacing:-.035em}.tool-panel,.content-panel{border:1px solid var(--line);border-radius:20px;padding:clamp(20px,4vw,34px);background:white}.form-control,.form-select{border-color:#dfe3ee;border-radius:10px;padding:.72rem .85rem}.btn-primary{background:var(--accent);border-color:var(--accent);border-radius:10px;padding:.68rem 1rem}.site-footer{border-top:1px solid var(--line);background:var(--surface)}.site-navbar{background:var(--navbar-bg,#fff)}.theme-dark{--ink:#edf0f7;--muted:#b0b8c8;--line:#343b4c;--surface:#202635;--navbar-bg:#171d29;background:#111722;color:var(--ink)}.theme-dark .site-navbar,.theme-dark .tool-card,.theme-dark .tool-panel,.theme-dark .content-panel{background:#171e2b;color:var(--ink);border-color:var(--line)}.theme-dark .hero{background:linear-gradient(135deg,#20283a,#17212e);border-color:var(--line)}.theme-dark .form-control,.theme-dark .form-select{background:#111722;color:var(--ink);border-color:#414a5e}.theme-dark .site-footer{background:#171e2b}.theme-dark .ad-slot{background:#171e2b;border-color:var(--line)}.theme-dark .tool-icon{background:#292c48}.theme-dark .table{--bs-table-bg:transparent;--bs-table-color:var(--ink);--bs-table-border-color:var(--line)}.theme-dark .admin-nav a{color:var(--ink)}.theme-dark .admin-nav a:hover{background:#252e40}.footer-links{display:flex;gap:18px;flex-wrap:wrap}.footer-links a{color:var(--muted);text-decoration:none}.ad-slot{border:1px dashed #d8dce8;background:#fafbfe;border-radius:12px;padding:10px;margin:18px 0;text-align:center;overflow:auto}.result-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--card-radius,12px);padding:15px;white-space:pre-wrap;overflow-wrap:anywhere}.category-label{font-size:.78rem;text-transform:uppercase;letter-spacing:.09em;color:var(--muted);font-weight:700}.admin-nav a{display:block;padding:10px 12px;border-radius:9px;text-decoration:none;color:var(--ink)}.admin-nav a:hover{background:var(--surface)}.prose p{line-height:1.8}@media(max-width:575px){.tool-card{padding:16px}.hero{border-radius:20px}}
/* V11 accessibility and rendering resilience */
html{scroll-behavior:smooth;scroll-padding-top:5rem}
body{min-width:320px;line-height:1.55}
img,video,canvas,iframe{max-width:100%}
.tool-panel,.content-panel,.result-box,.table-responsive{min-width:0;overflow-wrap:anywhere}
.skip-link{position:fixed;z-index:2000;top:8px;left:8px;transform:translateY(-160%);padding:.75rem 1rem;border-radius:.65rem;background:#111827;color:#fff;font-weight:700;text-decoration:none;box-shadow:0 4px 16px #0003}
.skip-link:focus{transform:translateY(0);color:#fff;outline:3px solid #fbbf24;outline-offset:3px}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:3px solid #f59e0b;outline-offset:3px;box-shadow:none}
.tool-card:focus-visible{border-color:var(--accent);outline-offset:4px}
button,.btn,.form-control,.form-select{touch-action:manipulation}
.form-control::placeholder{color:#687386;opacity:1}
.theme-dark .form-control::placeholder{color:#b0b8c8}
@media (hover:hover) and (prefers-reduced-motion:no-preference){.tool-card:hover{transform:translateY(-2px)}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}
@media (max-width:575px){.tool-panel,.content-panel{border-radius:15px}.btn{min-height:42px}.form-control,.form-select{min-height:44px}.footer-links{gap:12px}}

/* V26: side-by-side comparison, with bounded previews on mobile. */
.tx-compare-frame{display:flex;align-items:center;justify-content:center;min-height:140px;background:rgba(125,125,125,.06);border:1px solid rgba(125,125,125,.2);border-radius:10px;overflow:hidden;padding:8px}
.tx-compare-frame canvas,.tx-compare-frame img{max-width:100%;height:auto;object-fit:contain}
@media(max-width:767px){#ai-workspace{width:100%!important}.tx-compare-frame{min-height:90px}}