:root{--red:#e5322d;--red-600:#d21f1b;--red-700:#b01712;--ink:#1b2430;--muted:#6b7686;--line:#e9ecf0;--bg:#fff;--soft:#f7f8fa;--foot:#2b303a;--footmut:#9aa4b2}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:'Montserrat',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;font-weight:400;line-height:1.55}
a{color:var(--red-600);text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
/* header */
header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hbar{max-width:1120px;margin:0 auto;display:flex;align-items:center;gap:14px;padding:13px 20px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.02em;color:var(--ink)}
.logo .mk{width:32px;height:32px;border-radius:9px;background:var(--red);color:#fff;display:grid;place-items:center;font-size:17px;font-weight:800}
.logo .mk-img{height:32px;width:auto;display:block}
.hbar .sp{margin-left:auto}
.hchip{font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-weight:500}
.hcta{background:var(--red-600);color:#fff;border-radius:999px;padding:8px 16px;font-size:13px;font-weight:600;cursor:pointer;border:0}
.hcta:hover{background:var(--red-700)}
/* main menu */
.mainmenu{background:var(--soft);border-bottom:1px solid var(--line)}
.mm-inner{max-width:1120px;margin:0 auto;display:flex;flex-wrap:wrap;gap:8px;padding:14px 20px;justify-content:center}
.pill2{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 17px;font-size:13.5px;font-weight:600;cursor:pointer;color:var(--muted);font-family:inherit}
.pill2.sel{background:var(--ink);color:#fff;border-color:var(--ink)}
.pill2:hover:not(.sel){border-color:rgba(229,50,45,.45);color:var(--ink)}
/* hero */
.hero{text-align:center;padding:64px 20px 26px}
.badge{display:inline-flex;gap:7px;align-items:center;border:1px solid var(--line);border-radius:999px;padding:6px 13px;font-size:12px;color:var(--muted);font-weight:500}
.dot{width:7px;height:7px;border-radius:999px;background:var(--red)}
.hero h1{font-size:46px;line-height:1.04;letter-spacing:-.03em;font-weight:800;margin:16px 0 0}
.hero p{color:var(--muted);max-width:660px;margin:16px auto 0;font-size:18px;font-weight:400}
/* converter card */
.card{max-width:660px;margin:28px auto 0;border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:0 6px 24px rgba(17,24,39,.05)}
.drop{border:2px dashed var(--line);border-radius:16px;padding:40px 20px;text-align:center;cursor:pointer;transition:.15s}
.drop:hover,.drop.over{border-color:rgba(229,50,45,.55);background:rgba(229,50,45,.03)}
.drop .ic{width:52px;height:52px;border-radius:999px;background:rgba(229,50,45,.12);color:var(--red-600);display:grid;place-items:center;margin:0 auto 12px;font-size:24px}
.muted{color:var(--muted)} .small{font-size:13px}
.filebox{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--line);border-radius:13px;padding:12px 15px;background:var(--soft)}
label.lbl{display:block;font-size:13px;font-weight:600;margin:18px 0 9px}
.targets{display:flex;flex-wrap:wrap;gap:8px}
.tbtn{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;font-size:13px;cursor:pointer;font-weight:600;font-family:inherit;color:var(--ink)}
.tbtn.sel{background:var(--red-600);color:#fff;border-color:var(--red-600)}
.tbtn:hover:not(.sel){border-color:rgba(229,50,45,.45)}
input.txt,select{width:100%;border:1px solid var(--line);border-radius:13px;padding:11px 13px;font-size:14px;background:#fff;color:var(--ink);font-family:inherit}
.btn{width:100%;margin-top:20px;background:var(--red-600);color:#fff;border:0;border-radius:13px;padding:15px;font-weight:700;font-size:15px;cursor:pointer;font-family:inherit}
.btn:hover{background:var(--red-700)} .btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.status{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:13px;padding:13px 15px;font-size:14px;margin-top:8px}
.spin{width:16px;height:16px;border:2px solid var(--line);border-top-color:var(--red-600);border-radius:999px;animation:sp .7s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
.ok{background:rgba(229,50,45,.06)} .err{background:#fef2f2;color:#991b1b;border-color:#fecaca}
.tag{margin-left:auto;font-size:10px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--red-700);background:rgba(229,50,45,.12);border-radius:999px;padding:4px 9px}
.dl{display:flex;justify-content:center;gap:8px;align-items:center;background:var(--red-600);color:#fff;border-radius:13px;padding:14px;font-weight:700;margin-top:12px}
.trust{display:flex;flex-wrap:wrap;gap:18px;justify-content:center;color:var(--muted);font-size:12px;margin-top:20px;font-weight:500}
/* converters section (iLovePDF-style tool grid) */
section.tools{padding:14px 20px 40px}
.tools h2{font-size:30px;letter-spacing:-.02em;margin:0;font-weight:800;text-align:center}
.tools .sub{color:var(--muted);text-align:center;margin:14px auto 0;max-width:620px;font-size:13.5px}
.tools .mainmenu{background:none;border:0}
.tools .mm-inner{padding:6px 0 4px}
.search{max-width:560px;margin:8px auto 0;display:block;padding:14px 18px;border-radius:14px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(256px,1fr));gap:18px;margin-top:24px}
.tcard{display:block;border:1px solid var(--line);border-radius:12px;padding:22px 20px;background:#fff;transition:.18s;color:var(--ink)}
.tcard:hover{border-color:rgba(229,50,45,.35);box-shadow:0 10px 28px rgba(17,24,39,.10);transform:translateY(-3px)}
.tcard .ico{width:54px;height:54px;border-radius:15px;display:grid;place-items:center;font-size:27px}
.tcard .ti{font-weight:700;font-size:16px;margin-top:16px;color:var(--ink)}
.tcard .ds{color:var(--muted);font-size:13px;margin-top:5px;font-weight:400;line-height:1.5}
/* why section */
.why{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:56px 20px}
.why h2{text-align:center;font-size:28px;font-weight:800;letter-spacing:-.02em;margin:0 0 6px}
.why p.s{text-align:center;color:var(--muted);margin:0 auto 30px;max-width:600px}
.wcards{max-width:980px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.wcard{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px}
.wcard .wi{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:22px;background:rgba(229,50,45,.12);color:var(--red-600)}
.wcard h3{margin:14px 0 6px;font-size:17px;font-weight:700}
.wcard p{margin:0;color:var(--muted);font-size:14px}
/* footer */
footer{background:var(--foot);color:var(--footmut);padding:40px 20px}
.fgrid{max-width:1120px;margin:0 auto;display:flex;flex-wrap:wrap;gap:30px;justify-content:space-between}
.fbrand{max-width:320px}
.fbrand .logo{color:#fff}.fbrand .logo .mk{background:var(--red)}
.fbrand .logo .mk-img{filter:brightness(0) invert(1)}
.fbrand p{margin:12px 0 0;font-size:13px;line-height:1.7}
footer .fcol h4{color:#fff;font-size:13px;font-weight:600;margin:0 0 10px}
footer .fcol a,footer .fcol span{display:block;color:var(--footmut);font-size:13px;margin-bottom:7px;cursor:pointer}
footer .fcol a:hover{color:#fff}
.fbar{max-width:1120px;margin:26px auto 0;border-top:1px solid rgba(255,255,255,.1);padding-top:16px;font-size:12px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between}
.hidden{display:none}
@media(max-width:560px){.hero h1{font-size:34px}.tools h2{font-size:24px}}

/* --- seo/adsense additions --- */
.container{max-width:820px;margin:0 auto;padding:0 20px}
.crumb{font-size:12px;color:var(--muted);padding:18px 0 0}
.crumb a{color:var(--muted)} .crumb a:hover{color:var(--ink)}
.lead{font-size:18px;color:var(--ink);margin:8px 0 0}
h1.page{font-size:38px;font-weight:800;letter-spacing:-.02em;margin:10px 0 0}
.sec{margin:34px 0}
.sec h2{font-size:22px;font-weight:700;margin:0 0 10px}
.steps{margin:0;padding-left:20px} .steps li{margin:7px 0;color:var(--ink)}
.faq details{border:1px solid var(--line);border-radius:12px;padding:12px 15px;margin:8px 0}
.faq summary{font-weight:600;cursor:pointer}
.faq p{margin:9px 0 0;color:var(--muted)}
.rel{display:flex;flex-wrap:wrap;gap:8px} .rel a{border:1px solid var(--line);border-radius:999px;padding:7px 13px;font-size:13px;color:var(--ink)} .rel a:hover{border-color:rgba(229,50,45,.45)}
.adwrap{margin:26px auto;max-width:820px;text-align:center;min-height:1px}
.adwrap small{display:block;color:#b6bcc6;font-size:10px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:4px}
.legal{max-width:760px;margin:0 auto;padding:20px 0 40px}
.legal h1{font-size:34px;font-weight:800;margin:24px 0 4px}
.legal h2{font-size:19px;font-weight:700;margin:26px 0 8px}
.legal p,.legal li{color:var(--muted);font-size:15px;line-height:1.7}
.legal a{color:var(--red-600)}
/* skip link (a11y) */
.skip{position:absolute;left:-9999px;top:0;z-index:100;background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 10px 0;font-weight:600}
.skip:focus{left:0}
#main{scroll-margin-top:70px}
/* top nav */
.topnav{display:flex;gap:15px;margin-left:16px}
.topnav a{color:var(--muted);font-size:13px;font-weight:600;white-space:nowrap}
.topnav a:hover{color:var(--ink)}
.hcta{white-space:nowrap}
/* nav dropdowns (category menus with a Master Converter) */
.navdrop{position:relative;display:inline-block}
.navdrop-t{display:inline-flex;align-items:center;gap:5px;color:var(--muted);font-size:13px;font-weight:600;white-space:nowrap;cursor:pointer}
.navdrop-t:hover{color:var(--ink)}
.navdrop-t .caret{font-size:9px;opacity:.6}
.navdrop-m{position:absolute;top:100%;left:0;min-width:250px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 14px 34px rgba(17,24,39,.14);padding:7px;display:none;z-index:30}
.navdrop:hover .navdrop-m{display:block}
.navdrop-m a{display:block;padding:8px 12px;border-radius:8px;font-size:13px;font-weight:500;color:var(--ink);white-space:nowrap}
.navdrop-m a:hover{background:var(--soft)}
.navdrop-m .navmaster{font-weight:700;color:var(--red-600);background:rgba(229,50,45,.06);margin-bottom:5px;white-space:normal;line-height:1.35}
.navtoggle{display:none;flex-direction:column;gap:4px;background:none;border:0;cursor:pointer;padding:8px;margin-left:6px}
.navtoggle span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}
.navtoggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.navtoggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.navtoggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
@media(max-width:1160px){
  .navtoggle{display:flex}
  .topnav{position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;margin:0;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 8px 20px rgba(17,24,39,.08);max-height:0;overflow:hidden;transition:max-height .25s ease;z-index:19}
  .topnav.open{max-height:80vh;overflow-y:auto}
  .topnav>a{padding:14px 20px;border-top:1px solid var(--line);font-size:15px}
  header .hbar{flex-wrap:wrap}
  /* dropdowns collapse to a full-width category link → its Master Converter */
  .navdrop{width:100%;display:block}
  .navdrop-t{width:100%;padding:14px 20px;border-top:1px solid var(--line);font-size:15px;justify-content:space-between}
  .navdrop-m,.navdrop:hover .navdrop-m{display:none}
}
/* all-tools directory */
.dirsec{margin:34px 0}
.dirsec h2{font-size:20px;font-weight:800;letter-spacing:-.01em;margin:0 0 14px;display:flex;align-items:center;gap:9px}
.dirsec h2 .ce{font-size:22px}
.dirsec h2 .cn{color:var(--muted);font-weight:500;font-size:14px}
.dirlinks{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:8px}
.dirlinks a{border:1px solid var(--line);border-radius:11px;padding:11px 14px;font-size:13.5px;font-weight:600;color:var(--ink);background:#fff;transition:.15s}
.dirlinks a:hover{border-color:rgba(229,50,45,.45);box-shadow:0 4px 12px rgba(17,24,39,.06)}
/* guides */
.gcards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;margin:24px 0 8px}
.gcard{border:1px solid var(--line);border-radius:16px;padding:20px;background:#fff;transition:.15s;display:block}
.gcard:hover{border-color:rgba(229,50,45,.4);box-shadow:0 8px 20px rgba(17,24,39,.08);transform:translateY(-2px)}
.gcard h3{margin:0 0 7px;font-size:17px;font-weight:700;color:var(--ink)}
.gcard p{margin:0;color:var(--muted);font-size:14px;line-height:1.6}
.gcard .gmeta{display:block;margin-top:10px;font-size:12.5px;color:var(--muted);opacity:.85}
/* article byline, table of contents and author box */
.byline{margin:-6px 0 14px;font-size:13.5px;color:var(--muted)}
.byline strong{color:var(--ink)}
.byline .upd{color:var(--red-700);font-weight:600}
.toc{border:1px solid var(--line);border-radius:14px;padding:16px 20px;margin:0 0 26px;background:var(--soft)}
.toc h2{font-size:14px!important;margin:0 0 9px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.toc ol{margin:0;padding-left:20px}
.toc li{margin:5px 0;font-size:14.5px}
.toc a{color:var(--ink);text-decoration:none}
.toc a:hover{color:var(--red-700);text-decoration:underline}
.article h3{font-size:17px;font-weight:700;margin:20px 0 8px;color:var(--ink)}
.authorbox{display:flex;gap:16px;align-items:flex-start;border:1px solid var(--line);border-radius:16px;padding:20px;margin:30px 0 8px;background:var(--soft)}
.authorbox .abavatar{flex:0 0 48px;height:48px;border-radius:50%;background:var(--red-700);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;letter-spacing:.02em}
.authorbox h3{margin:0 0 6px;font-size:15px;font-weight:700}
.authorbox p{margin:0;color:var(--muted);font-size:14px;line-height:1.65}
@media(max-width:520px){.authorbox{flex-direction:column;gap:12px}}
.article .sec h2{font-size:22px}
.article code{background:var(--soft);border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:13px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.article .steps li{color:var(--muted);margin:9px 0}
/* coordinate converter output */
.coordout{margin-top:18px;border:1px solid var(--line);border-radius:13px;overflow:hidden}
.crow{display:flex;align-items:center;gap:12px;padding:12px 15px;border-top:1px solid var(--line)}
.crow:first-child{border-top:0}
.crow .ck{flex:0 0 46%;font-size:13px;color:var(--muted);font-weight:600}
.crow .cv{flex:1;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;color:var(--ink);word-break:break-word}
.ccopy{border:1px solid var(--line);background:#fff;border-radius:8px;padding:5px 10px;font-size:12px;font-weight:600;cursor:pointer;font-family:inherit;color:var(--muted)}
.ccopy:hover{border-color:rgba(229,50,45,.45);color:var(--ink)}
.crow.focus{background:rgba(229,50,45,.06)}
.crow.focus .ck{color:var(--red-700)}
.crow.focus .cv{font-weight:700}
@media(max-width:520px){.crow{flex-wrap:wrap}.crow .ck{flex:1 0 100%}}
/* live format hint under each lat/lon input */
.cohint{font-size:12.5px;line-height:1.45;margin:7px 2px 0;color:var(--muted);min-height:18px}
.cohint b{color:var(--ink);font-weight:700}
.cohint.ok{color:#15803d}
.cohint.ok b{color:#15803d}
.cohint.warn{color:var(--red-700)}
.cohint.warn b{color:var(--red-700)}
/* spreadsheet column pickers */
.colpick{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.colpick .collbl{display:block;font-size:12px;font-weight:600;color:var(--muted);margin:0 0 6px}
@media(max-width:480px){.colpick{grid-template-columns:1fr}}
/* map preview */
#previewWrap{margin-top:18px}
.prevlbl{font-size:13px;font-weight:600;margin:0 0 8px}
.prevlbl .muted{font-weight:400}
/* isolate: contain Leaflet's high z-index panes/controls so the map never
   paints over the sticky header's dropdown menus */
#previewMap{height:300px;border-radius:13px;border:1px solid var(--line);overflow:hidden;background:var(--soft);position:relative;z-index:0;isolation:isolate}
#previewMap .leaflet-container{font-family:inherit}