:root{
  --bg:#f3f7f6;--card:#fff;--ink:#0e2421;--mute:#4f6662;--line:#d5e2df;
  --brand:#0b6b61;--brand-d:#08524a;--soft:#e1f1ee;--warn:#fff4d6;--warn-line:#e8cf86;--err:#a3231b;--err-bg:#fdecea;
  --c-img:#0b6b61;--c-img-bg:#dcf1ed;--c-pdf:#b4402d;--c-pdf-bg:#fbe4df;--c-calc:#2f5fb3;--c-calc-bg:#e1ebfb;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans","Noto Sans Devanagari",sans-serif}
img{max-width:100%;height:auto}
a{color:var(--brand)}
a:hover{color:var(--brand-d)}
:focus-visible{outline:3px solid #f2a900;outline-offset:2px;border-radius:4px}
.wrap{width:100%;max-width:940px;margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px 12px;z-index:50}
.skip:focus{left:8px;top:8px}

/* header */
.site-head{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;min-height:58px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.05rem;color:var(--ink);text-decoration:none}
.logo svg{width:28px;height:28px}
.logo span{color:var(--brand)}
.menu-btn{background:none;border:1px solid var(--line);border-radius:8px;padding:8px 12px;font:inherit;font-size:.9rem;color:var(--ink);cursor:pointer}
.nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);padding:6px 16px 14px}
.nav.open{display:block}
.nav a{display:block;padding:11px 0;color:var(--ink);text-decoration:none;border-bottom:1px solid var(--line)}
.nav a:last-child{border-bottom:0}
@media(min-width:760px){
  .menu-btn{display:none}
  .nav{display:flex;position:static;border:0;padding:0;gap:22px;background:none}
  .nav a{border:0;padding:6px 0;font-size:.95rem}
}

/* hero */
.hero{background:linear-gradient(180deg,#e6f3f0,var(--bg));padding:34px 0 26px}
.hero h1{font-size:1.85rem;line-height:1.2;margin:0 0 10px;letter-spacing:-.01em;max-width:18em}
.hero p{margin:0 0 18px;color:var(--mute);max-width:34em}
.search{display:block;width:100%;max-width:520px;padding:14px 16px;font:inherit;border:1.5px solid var(--line);border-radius:10px;background:#fff}
.search:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px rgba(11,107,97,.18)}
.hero small{display:block;margin-top:10px;color:var(--mute)}

/* sections */
section{padding:22px 0}
h2{font-size:1.3rem;margin:0 0 4px;line-height:1.3}
.sub{margin:0 0 14px;color:var(--mute);font-size:.95rem}
.grid{display:grid;gap:10px;grid-template-columns:1fr}
@media(min-width:700px){.grid{grid-template-columns:1fr 1fr}}
.tool-row{display:flex;gap:12px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;text-decoration:none;color:var(--ink)}
.tool-row:hover{border-color:var(--brand)}
.tool-row[hidden]{display:none}
.ico{flex:0 0 40px;height:40px;border-radius:10px;display:grid;place-items:center}
.ico svg{width:22px;height:22px}
.ico.image{background:var(--c-img-bg);color:var(--c-img)}
.ico.pdf{background:var(--c-pdf-bg);color:var(--c-pdf)}
.ico.calc{background:var(--c-calc-bg);color:var(--c-calc)}
.tool-row b{display:block;line-height:1.3}
.tool-row span.d{display:block;color:var(--mute);font-size:.88rem;line-height:1.4;margin-top:2px}
.none{display:none;padding:16px;background:#fff;border:1px dashed var(--line);border-radius:12px;color:var(--mute)}
.none.show{display:block}
.more{display:inline-block;margin-top:12px;font-weight:600}

.points{display:grid;gap:12px;grid-template-columns:1fr}
@media(min-width:700px){.points{grid-template-columns:repeat(3,1fr)}}
.points div{background:var(--soft);border-radius:12px;padding:14px 16px}
.points b{display:block;margin-bottom:2px}
.points p{margin:0;color:var(--mute);font-size:.92rem}

.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips a{background:#fff;border:1px solid var(--line);border-radius:99px;padding:8px 14px;text-decoration:none;font-size:.92rem;color:var(--ink)}
.chips a:hover{border-color:var(--brand)}

/* tool page */
.crumbs{font-size:.85rem;color:var(--mute);padding:14px 0 0}
.crumbs a{color:var(--mute)}
.tool-head{padding:8px 0 4px}
.tool-head h1{font-size:1.65rem;line-height:1.25;margin:6px 0 8px;letter-spacing:-.01em}
.tool-head p{margin:0;color:var(--mute);max-width:40em}
.box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;margin:14px 0}
.notice{background:var(--warn);border:1px solid var(--warn-line);border-radius:10px;padding:10px 14px;font-size:.9rem;margin:14px 0}
.drop{display:block;border:2px dashed #9fc3bd;background:#f7fbfa;border-radius:12px;padding:26px 14px;text-align:center;cursor:pointer}
.drop.on,.drop:hover{border-color:var(--brand);background:var(--soft)}
.drop input{position:absolute;width:1px;height:1px;opacity:0}
.drop:focus-within{outline:3px solid #f2a900;outline-offset:2px}
.drop-t{display:block;font-weight:700;color:var(--brand)}
.drop-s{display:block;font-size:.85rem;color:var(--mute);margin-top:2px}
.panel{margin-top:14px}
.panel[hidden]{display:none}
.field{margin-bottom:12px}
.field label{display:block;font-weight:600;font-size:.92rem;margin-bottom:5px}
.field input[type=number],.field input[type=text],.field input[type=date],.field input[type=tel],.field select,.field textarea{width:100%;padding:11px 12px;font:inherit;border:1.5px solid var(--line);border-radius:9px;background:#fff;color:var(--ink)}
.field textarea{min-height:170px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px rgba(11,107,97,.18)}
.field input[type=range]{width:100%;accent-color:var(--brand)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.chk{display:flex;align-items:center;gap:8px;margin:2px 0 12px;font-size:.95rem}
.chk input{width:18px;height:18px;accent-color:var(--brand)}
.hint{font-size:.85rem;color:var(--mute);margin:-6px 0 12px}
.btn{display:inline-block;border:1.5px solid var(--brand);background:#fff;color:var(--brand);font:inherit;font-weight:700;padding:12px 18px;border-radius:10px;cursor:pointer;text-decoration:none;text-align:center}
.btn.primary{background:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-d)}
.btn:disabled{opacity:.55;cursor:wait}
.panel>.btn,.result>.btn{width:100%}
@media(min-width:560px){.panel>.btn,.result>.btn{width:auto}}
.info{margin:0 0 12px;font-size:.9rem;color:var(--mute);background:var(--soft);padding:8px 12px;border-radius:8px}
.msg{margin:12px 0 0;padding:10px 14px;border-radius:9px;background:var(--soft)}
.msg.err{background:var(--err-bg);color:var(--err)}
.result{margin-top:16px;padding:16px;border-radius:12px;background:#f1faf8;border:1px solid #bfe0da}
.result .big{font-weight:700;font-size:1.05rem;margin:0 0 6px}
.result .note{margin:0 0 8px;font-size:.9rem;color:var(--mute)}
.result .prev{display:block;max-height:260px;margin:0 0 12px;border-radius:8px;border:1px solid var(--line);background:#fff}
.files{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:8px}
.files li{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 10px}
.files img{width:42px;height:42px;object-fit:cover;border-radius:6px}
.fn{flex:1;min-width:0}
.fn b{display:block;font-size:.9rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fn small{color:var(--mute)}
.acts{display:flex;gap:4px;flex-wrap:wrap;justify-content:flex-end}
.mini{border:1px solid var(--line);background:#fff;border-radius:7px;padding:6px 9px;font:inherit;font-size:.8rem;cursor:pointer;color:var(--ink)}
.mini:disabled{opacity:.4}
canvas.cv{display:block;width:100%;max-width:340px;height:auto;margin:0 auto 14px;border:1px solid var(--line);background:#fff;border-radius:6px}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
@media(min-width:600px){.stats{grid-template-columns:repeat(3,1fr)}}
.stat{background:var(--soft);border-radius:10px;padding:10px 12px}
.stat b{display:block;font-size:1.4rem;line-height:1.2}
.stat span{font-size:.82rem;color:var(--mute)}
.pw{font:1.05rem/1.4 ui-monospace,Menlo,Consolas,monospace;word-break:break-all;background:#fff;border:1.5px solid var(--line);border-radius:9px;padding:12px;margin-bottom:10px}
.btns{display:flex;gap:10px;flex-wrap:wrap}

/* article text */
.prose h2{margin:26px 0 8px}
.prose p{margin:0 0 12px;max-width:42em}
.prose ol,.prose ul{padding-left:22px;max-width:42em}
.prose li{margin-bottom:6px}
details{background:#fff;border:1px solid var(--line);border-radius:10px;margin-bottom:8px}
summary{cursor:pointer;padding:12px 14px;font-weight:600}
details p{margin:0;padding:0 14px 14px;color:var(--mute)}

/* footer */
.site-foot{margin-top:30px;background:#0e2421;color:#cfe0dc;padding:26px 0 30px;font-size:.92rem}
.site-foot a{color:#fff}
.site-foot .links{display:flex;flex-wrap:wrap;gap:6px 18px;margin:0 0 12px;padding:0;list-style:none}
.site-foot p{margin:0 0 6px}