:root {
  --bg: #f4f6f8; --card: #ffffff; --ink: #17202a; --muted: #5d6b78; --line: #e1e6eb;
  --wa: #1fa855; --wa-dark: #168043; --red: #c62f2f; --red-bg: #fdecec; --amber: #a66300;
  --amber-bg: #fff4dd; --blue: #1d5fbf; --blue-bg: #e8f0fc; --ok-bg: #e6f6ec; --head: #12324f;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.oculto { display: none !important; }
.centro { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px; color: var(--muted); }
header { background: var(--head); color: #fff; padding: 14px 16px 0; position: sticky; top: 0; z-index: 5; }
header h1 { margin: 0; font-size: 18px; font-weight: 700; }
header .sub { font-size: 13px; opacity: .8; margin-top: 2px; }
nav { display: flex; gap: 4px; margin-top: 12px; }
nav button { flex: 1; background: none; border: 0; color: #c9d6e3; font: inherit; font-size: 15px;
  padding: 10px 0 12px; border-bottom: 3px solid transparent; cursor: pointer; }
nav button.on { color: #fff; border-bottom-color: #5fd38d; font-weight: 600; }
main { padding: 14px 16px 40px; max-width: 560px; margin: 0 auto; }
#login { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px; }
.login { width: 100%; max-width: 380px; }
.login h1 { margin: 0 0 6px; font-size: 22px; }
.totales { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 14px; }
.tot { background: var(--card); border-radius: 12px; padding: 12px; border: 1px solid var(--line); }
.tot .n { font-size: 20px; font-weight: 700; }
.tot .n.verde { color: var(--wa-dark); }
.tot .l { font-size: 13px; color: var(--muted); }
h2 { font-size: 14px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted);
  margin: 18px 0 8px; display: flex; align-items: center; gap: 8px; }
h2 .cnt { background: var(--line); color: var(--ink); border-radius: 10px; padding: 0 8px; font-size: 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px;
  margin-bottom: 10px; border-left: 5px solid var(--line); }
.card.vencido { border-left-color: var(--red); }
.card.hoy { border-left-color: var(--amber); }
.card.proximo { border-left-color: var(--blue); }
.card.pago { border-left-color: var(--wa); }
.fila { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.nombre { font-weight: 600; font-size: 17px; }
.monto { font-weight: 700; white-space: nowrap; }
.det { font-size: 14px; color: var(--muted); margin-top: 2px; }
.chip { display: inline-block; font-size: 12px; border-radius: 8px; padding: 1px 8px; margin-top: 6px; }
.chip.r { background: var(--red-bg); color: var(--red); }
.chip.a { background: var(--amber-bg); color: var(--amber); }
.chip.b { background: var(--blue-bg); color: var(--blue); }
.chip.g { background: var(--ok-bg); color: var(--wa-dark); }
.acciones { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.btn { border: 0; border-radius: 10px; padding: 10px 12px; font: inherit; font-size: 15px;
  font-weight: 600; cursor: pointer; text-decoration: none; text-align: center; }
.btn:disabled { opacity: .6; cursor: default; }
.btn.wa { background: var(--wa); color: #fff; flex: 1; }
.btn.sec { background: #eef1f4; color: var(--ink); }
.btn.link { background: none; color: var(--blue); padding: 4px 0; font-weight: 500; }
.btn.peligro { background: var(--red-bg); color: var(--red); }
.btn.ancho { width: 100%; margin-top: 8px; }
.vacio { color: var(--muted); font-size: 14px; padding: 4px 0 8px; }
form, .panel { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.panel + .panel, form + .panel { margin-top: 12px; }
label { display: block; font-size: 14px; color: var(--muted); margin: 10px 0 4px; }
input, textarea, select { width: 100%; font: inherit; padding: 10px; border: 1px solid #c8d1da; border-radius: 8px;
  background: #fff; color: var(--ink); }
textarea { min-height: 120px; resize: vertical; }
.dos { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.meses { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-top: 6px; }
.meses label { display: flex; align-items: center; gap: 6px; margin: 0; color: var(--ink); font-size: 15px; }
.meses input { width: auto; }
.ayuda { font-size: 13px; color: var(--muted); margin-top: 6px; }
.error { color: var(--red); font-size: 14px; margin-top: 8px; min-height: 1em; }
.modal-fondo { position: fixed; inset: 0; background: rgba(10,20,30,.55); display: none;
  align-items: flex-end; justify-content: center; z-index: 20; }
.modal-fondo.on { display: flex; }
.modal { background: #fff; width: 100%; max-width: 560px; border-radius: 16px 16px 0 0; padding: 16px; }
.modal h3 { margin: 0 0 4px; font-size: 18px; }
.modal .para { font-size: 14px; color: var(--muted); margin-bottom: 10px; }
.toast { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); background: #17202a;
  color: #fff; padding: 10px 16px; border-radius: 10px; font-size: 14px; opacity: 0; transition: opacity .2s;
  z-index: 30; pointer-events: none; max-width: calc(100% - 32px); }
.toast.on { opacity: 1; }
.enlace-legal { display: block; text-align: center; font-size: 13px; color: var(--muted); margin-top: 14px; }
.legal-cab { position: static; padding-bottom: 14px; }
.legal { max-width: 720px; line-height: 1.55; }
.legal h2 { text-transform: none; letter-spacing: 0; font-size: 18px; color: var(--ink); margin: 26px 0 8px; display: block; }
.legal ul { padding-left: 20px; }
.legal li { margin-bottom: 6px; }
.legal a { color: var(--blue); }
.legal-pie { margin-top: 32px; }