/* Estilos compartidos de las herramientas de jcalzada.es (tema oscuro). */
:root{
  --bg:#0f0c29;
  --grad: radial-gradient(1200px 600px at 80% 10%, rgba(232,62,140,.30), transparent 60%),
          radial-gradient(900px 500px at 0% 90%, rgba(242,113,33,.15), transparent 55%),
          linear-gradient(135deg,#0f0c29 0%,#302b63 45%,#0f0c29 100%);
  --accent: linear-gradient(135deg,#8A2387 0%,#E94057 55%,#F27121 120%);
  --blue:#8A2387; --purple:#e83e8c; --gold:#F27121;
  --text:#1b2a41; --muted:#5b6b86; --card:#fff; --border:#e6e9f0;
  --sans:'Open Sans',system-ui,Segoe UI,Roboto,sans-serif;
  --display:'Montserrat',system-ui,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box}
body{margin:0;font-family:var(--sans);color:#dfe6f5;background:var(--bg);
  background-image:var(--grad);background-attachment:fixed;min-height:100vh}
a{color:inherit}
.topbar{display:flex;align-items:center;gap:14px;max-width:960px;margin:0 auto;padding:18px 20px}
.topbar .brand{font-family:var(--display);font-weight:700;font-size:18px;color:#fff;text-decoration:none}
.topbar .brand b{background:var(--accent);-webkit-background-clip:text;background-clip:text;color:transparent}
.topbar .back{margin-left:auto;font-size:14px;color:#cdd6ea;text-decoration:none;opacity:.85}
.topbar .back:hover{opacity:1}
.wrap{max-width:820px;margin:10px auto 60px;padding:0 18px}
.hero-h1{font-family:var(--display);font-weight:700;font-size:30px;color:#fff;margin:18px 0 6px;line-height:1.2}
.hero-sub{color:#aab6d1;font-size:15px;margin:0 0 22px}
.card{background:var(--card);color:var(--text);border-radius:20px;padding:26px 24px;
  box-shadow:0 18px 50px rgba(0,0,0,.35)}
.card h2{font-family:var(--display);font-size:21px;margin:0 0 4px}
.subtitle{color:var(--muted);font-size:14px;margin:0 0 22px}
.form-label{display:block;font-weight:600;font-size:14px;margin:0 0 8px;color:#2a3852}
.form-control,select.form-control{width:100%;padding:11px 13px;border:1px solid var(--border);
  border-radius:10px;font-size:15px;font-family:var(--sans);color:var(--text);background:#fbfcfe}
.form-control:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(232,62,140,.18)}
.row{display:flex;flex-wrap:wrap;gap:16px}
.col-12{flex:0 0 100%;max-width:100%}
.col-md-6{flex:1 1 240px}
.mb-4{margin-bottom:22px}.mb-2{margin-bottom:12px}.mb-1{margin-bottom:6px}
.modo-group{display:flex;gap:10px;flex-wrap:wrap}
.modo-btn{flex:1 1 180px;border:2px solid var(--border);background:#fff;border-radius:12px;
  padding:12px 14px;cursor:pointer;text-align:center;font-family:var(--sans);color:var(--text);
  transition:.15s;font-weight:600}
.modo-btn:hover{border-color:var(--blue)}
.modo-btn.active{border-color:var(--purple);background:rgba(136,77,255,.07);box-shadow:0 4px 14px rgba(136,77,255,.12)}
.modo-btn small{display:block;font-weight:400;font-size:12px;color:var(--muted);margin-top:3px}
.btn-calc{width:100%;border:none;border-radius:12px;padding:15px;font-size:16px;font-weight:700;
  color:#fff;background:var(--accent);cursor:pointer;font-family:var(--display);margin-top:6px}
.btn-calc:hover{filter:brightness(1.06)}
.resultado{display:none;margin-top:24px}
.resultado-principal{background:linear-gradient(135deg,#0f0c29,#302b63);border-radius:16px;padding:22px;text-align:center;color:#fff}
.resultado-principal .label{font-size:13px;color:#aab6d1;text-transform:uppercase;letter-spacing:.5px}
.resultado-principal .importe{font-family:var(--display);font-weight:700;font-size:36px;margin:6px 0;
  background:var(--accent);-webkit-background-clip:text;background-clip:text;color:transparent}
.resultado-principal .periodo{color:#cdd6ea;font-size:14px}
.desglose{margin-top:18px}
.desglose h5{font-family:var(--display);font-size:15px;margin:0 0 8px}
.desglose-row{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid var(--border);font-size:14px}
.desglose-row .val{font-weight:600;text-align:right}
.desglose-row.total-row{border-bottom:none;border-top:2px solid var(--border);margin-top:4px;font-weight:700}
.aviso{margin-top:16px;background:#fff6e6;border:1px solid #f0dfae;border-radius:10px;padding:12px 14px;
  font-size:13px;color:#6a5320;line-height:1.5}
.aviso.fuerte{background:#fdecec;border-color:#f2c4c4;color:#7a2c2c}
.help{font-size:12.7px;color:var(--muted);line-height:1.55;margin-top:8px;background:#f5f7fb;border-radius:8px;padding:10px 12px}
.foot{max-width:820px;margin:0 auto;padding:20px;color:#8b96b3;font-size:12.5px;text-align:center}
@media(max-width:560px){ .hero-h1{font-size:24px} .resultado-principal .importe{font-size:28px} }