/* =========================================================
   Sistema de Préstamos — hoja de estilos
   Paleta: tinta (#16233D) + hueso (#F3F1EC) + esmeralda (#1C7C54)
   para saldos al día, ámbar (#B8842F) por vencer, rojo (#B23A2F) vencido.
   ========================================================= */

:root {
  --tinta:       #16233D;
  --tinta-suave: #2A3A5C;
  --hueso:       #F3F1EC;
  --hueso-card:  #FFFFFF;
  --linea:       #E1DDD3;
  --texto:       #232323;
  --texto-tenue: #6B6759;
  --esmeralda:   #1C7C54;
  --esmeralda-bg:#E4F2EA;
  --ambar:       #B8842F;
  --ambar-bg:    #FBF0DE;
  --rojo:        #B23A2F;
  --rojo-bg:     #FBE8E5;
  --whatsapp:    #25D366;
  --whatsapp-dark:#1DA851;
  --radio: 10px;
  --sombra: 0 1px 2px rgba(22,35,61,0.06), 0 4px 14px rgba(22,35,61,0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--hueso);
  color: var(--texto);
  line-height: 1.45;
}

a { color: inherit; text-decoration: none; }

.app-shell { min-height: 100vh; display: flex; flex-direction: column; }

/* ---------- Barra superior ---------- */
.topbar {
  background: var(--tinta);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.05rem; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--esmeralda); color: #fff; font-weight: 800;
}
.topnav { display: flex; flex-wrap: nowrap; gap: 18px; font-size: 0.92rem; align-items: center; }
.topnav a { opacity: 0.82; display: inline-flex; align-items: center; gap: 6px; padding: 6px 2px; border-bottom: 2px solid transparent; white-space: nowrap; flex: 0 0 auto; transition: opacity 0.15s, border-color 0.15s; }
.topnav a:hover { opacity: 1; text-decoration: none; }
.topnav a.nav-activo { opacity: 1; border-bottom-color: var(--esmeralda); font-weight: 600; }
.nav-salir { opacity: 0.62 !important; }

.app-main { flex: 1; padding: 28px; max-width: 1100px; margin: 0 auto; width: 100%; }

/* ---------- Encabezados de sección ---------- */
.page-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 20px; flex-wrap: wrap; gap: 10px; }
.page-head h1 { font-size: 1.5rem; margin: 0; letter-spacing: -0.01em; }
.page-head p.subt { color: var(--texto-tenue); margin: 4px 0 0; font-size: 0.92rem; }

/* ---------- Tarjetas ---------- */
.card {
  background: var(--hueso-card);
  border: 1px solid var(--linea);
  border-radius: var(--radio);
  box-shadow: var(--sombra);
  padding: 22px;
  margin-bottom: 20px;
}

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat-card { background: var(--hueso-card); border: 1px solid var(--linea); border-radius: var(--radio); padding: 16px 18px; }
.stat-card .num { font-size: 1.6rem; font-weight: 700; color: var(--tinta); }
.stat-card .lbl { font-size: 0.82rem; color: var(--texto-tenue); text-transform: uppercase; letter-spacing: 0.03em; }

/* ---------- Tablas ---------- */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--linea); font-size: 0.93rem; }
th { color: var(--texto-tenue); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #FAF9F6; }

/* ---------- Etiquetas de estado ---------- */
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 0.78rem; font-weight: 600; }
.badge-ok    { background: var(--esmeralda-bg); color: var(--esmeralda); }
.badge-warn  { background: var(--ambar-bg); color: var(--ambar); }
.badge-danger{ background: var(--rojo-bg); color: var(--rojo); }
.badge-muted { background: #EEECE4; color: var(--texto-tenue); }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px; border-radius: 8px; border: 1px solid transparent;
  font-size: 0.9rem; font-weight: 600; cursor: pointer;
}
.btn-primary { background: var(--tinta); color: #fff; }
.btn-primary:hover { background: var(--tinta-suave); }
.btn-outline { background: #fff; border-color: var(--linea); color: var(--texto); }
.btn-outline:hover { border-color: var(--tinta); }
.btn-whatsapp { background: var(--whatsapp); color: #fff; }
.btn-whatsapp:hover { background: var(--whatsapp-dark); }
.btn-danger { background: #fff; border-color: var(--rojo); color: var(--rojo); }
.btn-sm { padding: 6px 12px; font-size: 0.82rem; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- Formularios ---------- */
label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 5px; color: var(--tinta-suave); }
input[type=text], input[type=tel], input[type=email], input[type=password],
input[type=number], input[type=date], select, textarea, input[type=file] {
  width: 100%; padding: 9px 11px; border: 1px solid var(--linea); border-radius: 8px;
  font-size: 0.94rem; background: #fff; font-family: inherit; color: var(--texto);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--tinta-suave); outline-offset: 1px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { margin-bottom: 16px; }
.form-field.full { grid-column: 1 / -1; }
.help { font-size: 0.8rem; color: var(--texto-tenue); margin-top: 4px; }

/* ---------- Mensajes flash ---------- */
.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; font-size: 0.9rem; font-weight: 600; }
.flash-ok { background: var(--esmeralda-bg); color: var(--esmeralda); }
.flash-error { background: var(--rojo-bg); color: var(--rojo); }

/* ---------- Login ---------- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--tinta); }
.login-card { background: #fff; border-radius: 14px; padding: 36px 32px; width: 340px; box-shadow: 0 20px 60px rgba(0,0,0,0.35); }
.login-card h1 { font-size: 1.2rem; margin: 0 0 4px; }
.login-card p { color: var(--texto-tenue); font-size: 0.88rem; margin: 0 0 22px; }
.login-card .btn-primary { width: 100%; justify-content: center; margin-top: 6px; }

/* ---------- Documentos ---------- */
.doc-list { list-style: none; padding: 0; margin: 0; }
.doc-list li { display: flex; justify-content: space-between; align-items: center; padding: 9px 0; border-bottom: 1px solid var(--linea); font-size: 0.9rem; }
.doc-list li:last-child { border-bottom: none; }
.doc-tipo { color: var(--texto-tenue); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.02em; }

.empty-state { text-align: center; padding: 40px 20px; color: var(--texto-tenue); }

/* ---------- Configuración ---------- */
code {
  background: #EEECE4; color: var(--tinta-suave); padding: 2px 7px;
  border-radius: 5px; font-size: 0.82rem; font-family: ui-monospace, "SF Mono", Consolas, monospace;
}
details > summary { list-style: none; }
details > summary::-webkit-details-marker { display: none; }
details > summary::before { content: "▸ "; }
details[open] > summary::before { content: "▾ "; }

@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
  .app-main { padding: 16px; }
  .topbar { padding: 12px 16px; flex-wrap: wrap; gap: 10px; }
  .topnav { width: 100%; overflow-x: auto; padding-bottom: 2px; }
  .topnav a span { display: none; }
}