/* ============================================================================
   CalculadoraUSCIS — styles.css  ·  Brand: "Autoridad" (Navy + Gold)
============================================================================ */
:root{
  --navy:#12314f; --navy-700:#1b3f61; --navy-900:#0d2540;
  --gold:#c1963c; --gold-600:#a97f2c; --gold-050:#f7efdc;
  --ink:#1b2430; --muted:#5a6577; --line:#dfe3ea;
  --page:#f4f6f9; --card:#ffffff;
  --ok-bg:#e7f4ec; --ok-bd:#bfe3cc; --ok-tx:#1d6a3d;
  --short-bg:#fbeede; --short-bd:#f0d3a6; --short-tx:#8a5a12;
  --radius:10px; --maxw:760px;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--page);
  line-height:1.6;font-size:17px}
a{color:var(--navy-700)}
.cu-wrap{max-width:var(--maxw);margin:0 auto;padding:0 18px}

/* header */
.cu-header{background:var(--navy);color:#fff}
.cu-header .cu-wrap{display:flex;align-items:center;justify-content:space-between;
  padding-top:14px;padding-bottom:14px;gap:12px}
.cu-brand{font-size:20px;font-weight:700;letter-spacing:.2px;color:#fff;text-decoration:none}
.cu-brand b{color:var(--gold);font-weight:700}
.cu-nav{font-size:14px;color:#a9b6c6}
.cu-nav a{color:#cdd7e2;text-decoration:none;margin-left:16px}
.cu-nav a:hover{color:#fff}

/* hero */
.cu-hero{background:var(--navy);color:#fff;padding:8px 0 30px}
.cu-hero h1{margin:0 0 8px;font-size:27px;line-height:1.25;font-weight:700}
.cu-hero h1 em{color:var(--gold);font-style:normal}
.cu-hero p{margin:0;color:#c2cdda;font-size:16px;max-width:56ch}

/* calculator card */
.cu-card{background:var(--card);border:1px solid var(--line);border-radius:14px;
  margin:-18px auto 26px;padding:22px;box-shadow:0 6px 24px rgba(13,37,64,.10)}
.cu-card h2{margin:0 0 4px;font-size:19px;color:var(--navy)}
.cu-card .cu-hint{margin:0 0 18px;color:var(--muted);font-size:14px}

.cu-field{margin-bottom:16px}
.cu-field > label{display:block;font-weight:600;font-size:15px;margin-bottom:5px}
.cu-field .cu-sub{color:var(--muted);font-weight:400;font-size:13px;display:block;margin-top:1px}
.cu-input,select.cu-input{width:100%;font-size:16px;padding:11px 12px;border:1px solid var(--line);
  border-radius:var(--radius);background:#fff;color:var(--ink);font-family:inherit}
.cu-input:focus,select.cu-input:focus{outline:none;border-color:var(--navy-700);
  box-shadow:0 0 0 3px rgba(27,63,97,.14)}

/* stepper */
.cu-stepper{display:flex;align-items:stretch;max-width:200px}
.cu-stepper .cu-step{width:46px;font-size:22px;line-height:1;border:1px solid var(--line);
  background:#f6f8fb;color:var(--navy);cursor:pointer;border-radius:var(--radius)}
.cu-stepper .cu-step:hover{background:var(--gold-050);border-color:var(--gold)}
.cu-stepper .cu-input{text-align:center;border-radius:0;border-left:0;border-right:0;
  -moz-appearance:textfield;max-width:90px}
.cu-stepper .cu-input::-webkit-outer-spin-button,
.cu-stepper .cu-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.cu-stepper .cu-step:first-child{border-radius:var(--radius) 0 0 var(--radius)}
.cu-stepper .cu-step:last-child{border-radius:0 var(--radius) var(--radius) 0}

/* checkbox rows */
.cu-check{display:flex;gap:10px;align-items:flex-start;padding:11px 12px;border:1px solid var(--line);
  border-radius:var(--radius);background:#fbfcfe;cursor:pointer}
.cu-check input{margin-top:3px;width:18px;height:18px;flex:0 0 auto;accent-color:var(--navy)}
.cu-check .cu-check-tx{font-size:15px}
.cu-check .cu-check-tx .cu-sub{margin-top:2px}
.cu-note{margin:8px 2px 0;font-size:13px;color:var(--gold-600);background:var(--gold-050);
  border-radius:8px;padding:8px 10px}

.cu-grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:560px){.cu-grid2{grid-template-columns:1fr}}

/* submit */
.cu-submit{width:100%;margin-top:6px;background:var(--gold);color:var(--navy-900);
  font-size:17px;font-weight:700;border:0;border-radius:var(--radius);padding:14px;cursor:pointer}
.cu-submit:hover{background:var(--gold-600);color:#fff}

/* result */
.cu-result{margin-top:22px;border-top:1px solid var(--line);padding-top:20px}
.cu-result-head{color:var(--muted);font-size:14px}
.cu-result-amount{font-size:38px;font-weight:700;color:var(--navy);line-height:1.1;margin:2px 0 4px}
.cu-result-amount span{font-size:16px;font-weight:400;color:var(--muted)}
.cu-result-sub{color:var(--muted);font-size:14px;margin-bottom:14px}
.cu-breakdown{list-style:none;margin:0 0 4px;padding:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.cu-breakdown li{display:flex;justify-content:space-between;padding:9px 13px;font-size:14px;border-top:1px solid #eef1f5}
.cu-breakdown li:first-child{border-top:0}
.cu-breakdown li span:last-child{font-weight:600;color:var(--navy)}
.cu-breakdown-total{background:#f6f8fb;font-weight:700}
.cu-breakdown-total span:last-child{color:var(--navy)}

.cu-verdict{margin-top:14px;border-radius:var(--radius);padding:13px 15px;font-size:15px}
.cu-verdict strong{display:block;margin-bottom:3px}
.cu-verdict span{color:inherit}
.cu-ok{background:var(--ok-bg);border:1px solid var(--ok-bd);color:var(--ok-tx)}
.cu-short{background:var(--short-bg);border:1px solid var(--short-bd);color:var(--short-tx)}

.cu-actions{margin-top:16px}
.cu-share{display:inline-flex;align-items:center;gap:8px;background:#25d366;color:#0a3d1f;
  border:0;border-radius:var(--radius);padding:11px 16px;font-size:15px;font-weight:600;cursor:pointer}
.cu-share:hover{filter:brightness(.96)}
.cu-wa{width:16px;height:16px;border-radius:50%;background:#0a3d1f;display:inline-block}

.cu-trustline{font-size:13px;color:var(--muted);margin:16px 0 4px}
.cu-legal{font-size:13px;color:var(--muted);background:#f6f8fb;border-radius:8px;padding:10px 12px;margin:0}

/* explainer section */
.cu-section{padding:8px 0 30px}
.cu-section h2{font-size:21px;color:var(--navy);margin:24px 0 8px}
.cu-section h3{font-size:17px;color:var(--navy);margin:20px 0 6px}
.cu-section p{margin:0 0 12px}
.cu-ad{border:1px dashed var(--line);border-radius:var(--radius);background:#fbfcfe;color:#a7adb8;
  text-align:center;font-size:12px;padding:20px;margin:22px 0}

/* faq */
.cu-faq details{border:1px solid var(--line);border-radius:var(--radius);background:#fff;
  padding:2px 14px;margin-bottom:10px}
.cu-faq summary{cursor:pointer;font-weight:600;padding:12px 0;font-size:15px;color:var(--navy);list-style:none}
.cu-faq summary::-webkit-details-marker{display:none}
.cu-faq summary::before{content:"+";color:var(--gold);font-weight:700;margin-right:9px}
.cu-faq details[open] summary::before{content:"–"}
.cu-faq details p{padding:0 0 12px;font-size:15px}

/* footer */
.cu-footer{background:var(--navy-900);color:#9fb0c1;font-size:13px;padding:26px 0 34px}
.cu-footer .cu-wrap{display:flex;flex-wrap:wrap;gap:6px 20px;justify-content:space-between}
.cu-footer a{color:#c3d0dd;text-decoration:none}
.cu-footer a:hover{color:#fff}
.cu-footer .cu-foot-legal{width:100%;color:#7c8da0;margin-top:12px;line-height:1.5}