:root{--bg:#f7f8fa;--card:#fff;--ink:#1b2430;--muted:#5a6676;--line:#dde2e9;--brand:#0f6fde;--brand-ink:#fff;--ok:#0a7a4b;--warn:#8a5a00}
@media (prefers-color-scheme:dark){:root{--bg:#10151c;--card:#18202a;--ink:#e8edf3;--muted:#9aa7b6;--line:#2a3544;--brand:#4b9bff;--brand-ink:#08121f;--ok:#4cc38a;--warn:#e0b04a}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.wrap{max-width:820px;margin:0 auto;padding:0 16px}
header.site{background:var(--card);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;padding:12px 16px}
header.site a.logo{font-weight:800;font-size:1.15rem;color:var(--ink);text-decoration:none}
nav{display:flex;flex-wrap:wrap;gap:4px 14px}
nav a{color:var(--muted);text-decoration:none;font-size:.95rem;white-space:nowrap}
nav a:hover{color:var(--brand)}
h1{font-size:1.9rem;line-height:1.25;margin:28px 0 8px}
h2{font-size:1.35rem;margin:34px 0 8px}
h3{font-size:1.1rem;margin:22px 0 6px}
p.lead{color:var(--muted);margin-top:0}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;margin:18px 0}
label{display:block;font-weight:600;margin:12px 0 4px;font-size:.95rem}
input,select{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink);font:inherit}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:560px){.row{grid-template-columns:1fr}}
button{margin-top:16px;background:var(--brand);color:var(--brand-ink);border:0;border-radius:8px;padding:12px 20px;font:inherit;font-weight:700;cursor:pointer}
.result{margin-top:18px;padding:16px;border-radius:10px;background:var(--bg);border:1px dashed var(--line)}
.result .big{font-size:1.8rem;font-weight:800;color:var(--ok)}
.result table{width:100%;border-collapse:collapse;margin-top:10px}
.result td{padding:6px 0;border-bottom:1px solid var(--line)}
.result td:last-child{text-align:right;font-variant-numeric:tabular-nums}
.note{font-size:.9rem;color:var(--muted)}
.warn{color:var(--warn)}
.tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}
.tools a{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;text-decoration:none;color:var(--ink)}
.tools a:hover{border-color:var(--brand)}
.tools strong{display:block;font-size:1.1rem;margin-bottom:4px}
.tools span{color:var(--muted);font-size:.95rem}
.ad{min-height:90px;margin:20px 0;text-align:center;color:var(--muted);font-size:.8rem}
footer.site{margin-top:50px;padding:24px 0;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}
footer.site a{color:var(--muted);margin-right:14px}
a{color:var(--brand)}
.f{margin:0;font-weight:400;display:block}
.f>span,.lab{display:block;font-size:.78rem;font-weight:600;color:var(--muted);margin:0 0 3px}
.pers{display:grid;grid-template-columns:1.5fr 1.1fr 1.1fr 1.4fr 44px;gap:8px;margin:10px 0;padding:10px;border:1px solid var(--line);border-radius:10px;align-items:end}
.f-del button{width:100%}
.adv .f-paid{display:none}
.adv .pers{grid-template-columns:1.6fr 1.1fr 1.4fr 44px}
@media(max-width:640px){
.pers,.adv .pers{grid-template-columns:1.3fr 1fr 44px}
.pers .f-name{grid-area:1/1}.pers .f-paid{grid-area:1/2}.pers .f-del{grid-area:1/3}
.pers .f-w{grid-area:2/1}.pers .f-alias{grid-area:2/2/3/4}
.adv .pers .f-name{grid-area:1/1/2/3}
}
.btn2{margin:0;background:transparent;color:var(--ink);border:1px solid var(--line);padding:9px 12px;font-weight:600}
.btns{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.btns button,.btns .btn2{margin-top:10px}
textarea{width:100%;min-height:210px;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink);font:inherit;line-height:1.5;resize:vertical}
.hint{font-size:.85rem;color:var(--muted);margin:2px 0 0}

.gasto{display:grid;grid-template-columns:1.6fr 1fr 1.2fr 44px;gap:8px;margin:10px 0;padding:10px;border:1px solid var(--line);border-radius:10px;align-items:end}
.g-chips-wrap{grid-column:1 / -1}
.g-chips{display:flex;flex-wrap:wrap;gap:6px 8px}
.chip{display:inline-flex;align-items:center;gap:5px;font-weight:500;margin:0;font-size:.9rem;border:1px solid var(--line);border-radius:999px;padding:4px 11px;background:var(--bg);cursor:pointer}
.chip input{width:auto;margin:0}
@media(max-width:640px){
.gasto{grid-template-columns:1fr 1fr 44px}
.gasto .f-desc{grid-area:1/1/2/4}.gasto .f-monto{grid-area:2/1}.gasto .f-payer{grid-area:2/2}.gasto .f-del{grid-area:2/3}
}