:root{--bg:#f4f6f3;--surface:#fff;--ink:#16221d;--muted:#51605a;--line:#d5ddd8;--accent:#0b6b5a;--accent-ink:#fff;--err:#a3261b;--focus:#c47a00;--max:1120px}
@media(prefers-color-scheme:dark){:root{--bg:#0f1714;--surface:#16211d;--ink:#e8efeb;--muted:#9fb0a8;--line:#2a3a34;--accent:#3fc3a6;--accent-ink:#06231c;--err:#ff8a7d;--focus:#ffc24d}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:1rem/1.65 system-ui,-apple-system,"Segoe UI","Noto Sans Tamil","Latha",sans-serif}
a{color:var(--accent)}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 1rem}
header.site{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;min-height:56px}
.brand{font-weight:700;text-decoration:none;color:var(--ink)}
#site-nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--surface);border-bottom:1px solid var(--line);padding:.5rem 1rem}
#site-nav.open{display:block}#site-nav a{display:block;padding:.7rem 0;color:var(--ink);text-decoration:none}
#nav-toggle{min-height:44px;min-width:44px;background:none;border:1px solid var(--line);border-radius:6px;color:var(--ink);font:inherit}
@media(min-width:760px){#nav-toggle{display:none}#site-nav{display:flex!important;position:static;border:0;padding:0;gap:1.25rem;background:none}#site-nav a{padding:.4rem 0}}
h1{font-size:clamp(1.9rem,5vw,3rem);line-height:1.15;margin:2rem 0 .5rem;letter-spacing:-.01em}
h2{font-size:1.5rem;margin:2.5rem 0 .5rem;line-height:1.25}.lead{color:var(--muted);max-width:62ch;margin:0 0 1.5rem}
.tool-card{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:1rem}
.tool-grid{display:grid;gap:1rem}@media(min-width:860px){.tool-grid{grid-template-columns:1fr 1fr}}
.tool-header{display:flex;justify-content:space-between;align-items:baseline;gap:.5rem;margin-bottom:.5rem}
.tool-header label,.tool-header h2{font-weight:650;font-size:1rem;margin:0}
textarea{width:100%;min-height:240px;resize:vertical;padding:.75rem;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--ink);font:1.05rem/1.6 "Noto Sans Tamil","Latha",system-ui,sans-serif}
.meta{color:var(--muted);font-size:.875rem;margin:.4rem 0}
.tool-actions{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.5rem}
button.btn{min-height:44px;padding:0 1rem;border-radius:6px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:inherit;cursor:pointer}
button.btn:hover{border-color:var(--accent)}button.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:650}
#status{min-height:1.5rem;margin:.75rem 0 0;font-size:.95rem}#status[data-state=error]{color:var(--err)}
.note{font-size:.9rem;color:var(--muted);border-left:3px solid var(--line);padding-left:.75rem;margin:1rem 0}
.example{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center}code.tm{background:var(--bg);padding:.15rem .4rem;border-radius:4px}
details{border-bottom:1px solid var(--line);padding:.75rem 0}summary{cursor:pointer;font-weight:600;min-height:32px}
.ad-slot,.premium-feature{display:none}
footer.site{margin-top:3rem;border-top:1px solid var(--line);padding:1.5rem 0;color:var(--muted);font-size:.9rem}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.skip{position:absolute;left:-999px}.skip:focus{left:1rem;top:1rem;background:var(--surface);padding:.5rem;z-index:20}
.tool-title{font-size:1.1rem;margin:0 0 .75rem}.tool-actions.top{margin-top:1rem;align-items:center}
a.linkbtn{display:inline-flex;align-items:center;text-decoration:none}a.btn,a.linkbtn.btn{border:1px solid var(--line);border-radius:6px;padding:0 1rem;color:var(--ink);min-height:44px}a.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);font-weight:650;border-radius:6px;padding:0 1rem}
#site-nav a[aria-current=page]{font-weight:700;text-decoration:underline}
details.tools{position:relative}details.tools summary{padding:.7rem 0;min-height:44px}details.tools div{display:flex;flex-direction:column;gap:.25rem;padding:.25rem 0 .5rem}details.tools span{color:var(--muted);font-size:.9rem}
@media(min-width:760px){details.tools summary{padding:.4rem 0;min-height:0}details.tools div{position:absolute;right:0;top:100%;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:.75rem 1rem;min-width:240px;z-index:12}}
.plain{padding-left:1.1rem}.plain li{margin:.4rem 0}.steps li{margin:.7rem 0}
table.ex{border-collapse:collapse;width:100%;max-width:520px}table.ex th,table.ex td{border-bottom:1px solid var(--line);padding:.5rem;text-align:left}
.tool-list{padding-left:1.1rem}.cta{margin:2.5rem 0;padding:1.5rem;background:var(--surface);border:1px solid var(--line);border-radius:10px}.cta h2{margin-top:0}
.foot{display:grid;gap:1.25rem;padding-bottom:1rem}.foot a{display:block;color:var(--muted);padding:.2rem 0}.foot strong{display:block;color:var(--ink);margin-bottom:.25rem}@media(min-width:760px){.foot{grid-template-columns:2fr 1fr 1.3fr 1.5fr}}.copy{border-top:1px solid var(--line);padding-top:1rem}
.cform{display:grid;gap:.5rem;max-width:560px}.cform input,.cform textarea{width:100%;padding:.7rem;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--ink);font:inherit;min-height:44px}.cform textarea{min-height:160px}.hp{position:absolute;left:-9999px}
#form-status[data-state=error]{color:var(--err)}