:root{
  --bg:#f5f7f4; --surface:#ffffff; --surface-2:#eceff0; --ink:#17243a; --muted:#566173;
  --line:#dbe0dc; --accent:#23684a; --accent-ink:#1d5a3f; --accent-soft:#e3efe7;
  --lantern:#ffc83d; --good:#23684a; --radius:10px; --maxw:1080px;
  --sans: system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Hiragino Sans","Yu Gothic",sans-serif;
  --serif: var(--sans);
  --mono: ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#111821; --surface:#18212c; --surface-2:#202a36; --ink:#e7ebee; --muted:#9ea8b5;
  --line:#2b3542; --accent:#6fcf9c; --accent-ink:#8fdcb3; --accent-soft:#1c2e27; --good:#6fcf9c;
}}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--sans)}
a{color:var(--accent-ink)}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
img,svg{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:8px;background:var(--surface);padding:8px;z-index:9}

/* header / footer */
.site-head{border-bottom:1px solid var(--line);background:var(--surface)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font:800 20px/1 var(--sans);color:var(--ink);text-decoration:none;letter-spacing:-.3px}
.brand svg{width:26px;height:26px;flex:none}
.nav{display:flex;gap:18px;flex-wrap:wrap}
.nav a{color:var(--muted);text-decoration:none;font-size:15px}
.nav a:hover,.nav a[aria-current]{color:var(--ink)}
.site-foot{margin-top:64px;border-top:1px solid var(--line);background:var(--surface);color:var(--muted);font-size:14px}
.site-foot .wrap{padding-top:28px;padding-bottom:28px;display:grid;gap:14px}
.site-foot nav{display:flex;gap:18px;flex-wrap:wrap}
.site-foot a{color:var(--muted)}
.site-foot p{margin:0}
.langs{display:flex;gap:14px;flex-wrap:wrap;font-size:14px}
.langs span{font-weight:700;color:var(--ink)}
.disclaimer{margin-top:14px}
.badge{display:inline-block;margin-left:6px;font:600 12px/1.6 var(--sans);color:var(--good);border:1px solid currentColor;border-radius:99px;padding:0 7px;vertical-align:middle}

/* type */
h1,h2,h3{font-family:var(--sans);font-weight:800;line-height:1.15;letter-spacing:-.4px}
h1{font-size:clamp(28px,5vw,42px);margin:28px 0 10px}
h2{font-size:clamp(22px,3.4vw,28px);margin:44px 0 12px}
h3{font-size:19px;margin:26px 0 8px}
.lede{font-size:18px;color:var(--muted);max-width:68ch;margin:0 0 20px}
.prose{max-width:72ch}
.prose p,.prose li{color:var(--ink)}
.crumbs{font-size:14px;color:var(--muted);margin-top:18px}
.crumbs a{color:var(--muted)}
.stamp{display:inline-block;font-size:13px;color:var(--good);background:color-mix(in srgb,var(--good) 12%,transparent);padding:3px 10px;border-radius:99px;margin-bottom:6px}

/* tool card */
.tool{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:0 1px 0 rgba(0,0,0,.02)}
.grid2{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-weight:600;font-size:14px}
.field small{color:var(--muted);font-size:13px}
input[type=number],input[type=text],select,textarea{width:100%;font:16px var(--sans);color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:10px 12px}
textarea{min-height:180px;resize:vertical;font-family:var(--mono);font-size:14px;line-height:1.5}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:transparent}
.btn{display:inline-flex;align-items:center;gap:8px;font:600 15px var(--sans);border:0;border-radius:8px;padding:10px 16px;background:var(--accent);color:#fff;cursor:pointer;text-decoration:none}
.btn:hover{filter:brightness(1.08)}
@media (prefers-color-scheme:dark){.btn{color:#0e1a14}}
.btn.ghost{background:transparent;color:var(--accent-ink);border:1px solid var(--line)}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
fieldset{border:1px solid var(--line);border-radius:10px;padding:14px 16px 16px;margin:0}
legend{font-weight:700;font-size:15px;padding:0 6px;color:var(--ink)}
.chk{display:flex;gap:8px;align-items:center;font-size:15px}

/* results */
.results{margin-top:20px}
.summary{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));margin-bottom:16px}
.kpi{background:var(--accent-soft);border-radius:10px;padding:12px 14px}
.kpi b{display:block;font:800 24px/1.2 var(--sans);font-variant-numeric:tabular-nums}
.kpi span{font-size:13px;color:var(--muted)}
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:10px}
table{width:100%;border-collapse:collapse;font-size:15px;background:var(--surface)}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
th{font-size:13px;color:var(--muted);font-weight:600;background:var(--surface-2);cursor:default}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
tr.best td{background:color-mix(in srgb,var(--good) 9%,transparent)}
tr:last-child td{border-bottom:0}
.bar{height:6px;border-radius:3px;background:var(--accent);min-width:2px}
.note{font-size:13px;color:var(--muted);margin-top:10px}

/* ad slots: empty until AdSense is approved */
.ad-slot{min-height:0}
.ad-slot:empty{display:none}

/* hub grid */
.tool-grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));margin:14px 0 8px;padding:0;list-style:none}
.tool-grid a{display:block;height:100%;background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:6px;padding:14px 16px 16px;text-decoration:none;color:var(--ink)}
.tool-grid a:hover strong{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px}
.tool-grid strong{display:block;font:700 17px/1.3 var(--sans);margin-bottom:6px}
.tool-grid span{font-size:14px;color:var(--muted)}
.cat{font-size:17px;font-weight:700;color:var(--ink);margin:30px 0 0}
.hero{padding:16px 0 4px}

/* faq */
.faq details{border-bottom:1px solid var(--line);padding:12px 0}
.faq summary{font-weight:600;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"+";display:inline-block;width:20px;color:var(--accent)}
.faq details[open] summary::before{content:"–"}
.faq details p{margin:8px 0 0 20px;color:var(--ink)}

.example{background:var(--surface-2);border-radius:10px;padding:14px 16px;margin:14px 0}
code{font-family:var(--mono);font-size:.92em;background:var(--surface-2);padding:1px 5px;border-radius:4px}
@media (max-width:560px){.tool{padding:16px}th,td{padding:8px 10px}}

/* home hero: a worked receipt as the banner */
.home-hero{display:grid;gap:28px;align-items:center;padding:24px 0 8px}
.home-hero h1{font-size:clamp(30px,5.2vw,46px);margin:8px 0 14px;max-width:16ch}
.home-hero .lede{color:var(--ink);opacity:.86}
@media (min-width:820px){.home-hero{grid-template-columns:minmax(0,1.15fr) minmax(300px,.85fr);gap:48px;padding:40px 0 16px}}
.receipt{position:relative;margin:0;width:min(100%,360px);background:#fffdf7;color:#1f2733;font:15px/1.5 var(--mono);padding:22px 22px 30px;border-radius:4px 4px 0 0;box-shadow:0 18px 40px -18px rgba(23,36,58,.45);
  -webkit-mask:conic-gradient(from -45deg at bottom,#0000,#000 1deg 89deg,#0000 90deg) 50%/14px 100%;mask:conic-gradient(from -45deg at bottom,#0000,#000 1deg 89deg,#0000 90deg) 50%/14px 100%}
.glow{display:grid;place-items:center;padding:28px 8px;background:radial-gradient(closest-side,color-mix(in srgb,var(--lantern) 70%,transparent),transparent 100%)}
@media (min-width:820px){.receipt{transform:rotate(-2deg)}}
.receipt figcaption{font-weight:700;padding-bottom:10px;margin-bottom:10px;border-bottom:2px dashed #c9ccc6}
.receipt dl{margin:0}
.receipt dl div{display:flex;justify-content:space-between;gap:16px;padding:3px 0}
.receipt dt{margin:0}.receipt dd{margin:0;font-variant-numeric:tabular-nums;white-space:nowrap}
.r-total{display:flex;justify-content:space-between;gap:16px;font-weight:800;font-size:18px;margin:12px 0 14px;padding-top:10px;border-top:2px dashed #c9ccc6}
.r-link{color:#1d5a3f;font-family:var(--sans);font-weight:600}
@media (prefers-color-scheme:dark){.receipt{box-shadow:0 18px 50px -12px rgba(0,0,0,.7)}}

/* file drop zone */
.drop{display:grid;gap:4px;place-items:center;text-align:center;padding:28px 16px;border:2px dashed var(--line);border-radius:var(--radius);background:var(--bg);cursor:pointer}
.drop:hover,.drop.over,.drop:focus-within{border-color:var(--accent);background:var(--accent-soft)}
.drop span{color:var(--muted);font-size:14px}
.drop input{position:absolute;width:1px;height:1px;opacity:0}
.drop{position:relative}
details summary{cursor:pointer;font-weight:600}