:root {
  --azul: #1F4E78;
  --azul-claro: #eef4fa;
  --azul-hover: #163a5c;
  --verde: #2e7d32;
  --rojo: #c62828;
  --gris-texto: #333;
  --gris-borde: #e0e6ec;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--azul-claro);
  color: var(--gris-texto);
}

/* ---------- Login ---------- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.login-card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 6px 24px rgba(0,0,0,0.08);
  padding: 32px 28px;
  width: 100%;
  max-width: 360px;
  text-align: center;
}

.login-card h1 {
  color: var(--azul);
  font-size: 20px;
  margin: 8px 0 24px;
}

.login-card input {
  width: 100%;
  padding: 12px;
  margin-bottom: 12px;
  border: 1px solid var(--gris-borde);
  border-radius: 6px;
  font-size: 15px;
}

.login-card button {
  width: 100%;
  padding: 12px;
  background: var(--azul);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.login-card button:hover { background: var(--azul-hover); }

.error-msg { color: var(--rojo); font-size: 13px; margin-top: 8px; min-height: 18px; }

/* ---------- Dashboard ---------- */
header.top {
  background: var(--azul);
  color: #fff;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
header.top .titulo { font-weight: 600; font-size: 16px; }
header.top .usuario { font-size: 13px; opacity: 0.9; }
header.top button {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.5);
  color: #fff;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}

nav.tabs {
  display: flex;
  gap: 4px;
  background: #fff;
  padding: 0 16px;
  border-bottom: 1px solid var(--gris-borde);
  overflow-x: auto;
}
nav.tabs button {
  border: none;
  background: none;
  padding: 14px 16px;
  font-size: 14px;
  cursor: pointer;
  color: #666;
  border-bottom: 3px solid transparent;
  white-space: nowrap;
}
nav.tabs button.activo { color: var(--azul); border-bottom-color: var(--azul); font-weight: 600; }

main { padding: 16px; max-width: 900px; margin: 0 auto; }

.tarjetas { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 20px; }
.tarjeta { background: #fff; border-radius: 8px; padding: 16px; text-align: center; box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
.tarjeta .numero { font-size: 28px; font-weight: 700; color: var(--azul); }
.tarjeta .etiqueta { font-size: 12px; color: #777; margin-top: 4px; }

.seccion { display: none; }
.seccion.activa { display: block; }

.item {
  background: #fff;
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.item .titulo-item { font-weight: 600; font-size: 15px; }
.item .meta { font-size: 13px; color: #777; margin-top: 2px; }
.item .cliente { font-size: 13px; color: var(--azul); margin-top: 2px; }
.item.completada .titulo-item { text-decoration: line-through; color: #999; }

.acciones { display: flex; gap: 6px; margin-top: 10px; flex-wrap: wrap; }
.acciones button {
  border: 1px solid var(--gris-borde);
  background: #fafbfc;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
}
.acciones button:hover { background: var(--azul-claro); }
.acciones button.ok { border-color: var(--verde); color: var(--verde); }
.acciones button.peligro { border-color: var(--rojo); color: var(--rojo); }

.form-nueva-tarea {
  background: #fff;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.form-nueva-tarea input, .form-nueva-tarea select {
  width: 100%;
  padding: 10px;
  margin-bottom: 8px;
  border: 1px solid var(--gris-borde);
  border-radius: 6px;
  font-size: 14px;
}
.form-nueva-tarea button {
  background: var(--azul); color: #fff; border: none; padding: 10px 16px;
  border-radius: 6px; cursor: pointer; font-weight: 600;
}

.vacio { text-align: center; color: #999; padding: 30px 0; font-size: 14px; }

.submenu {
  display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap;
}

@media (max-width: 480px) {
  .tarjetas { grid-template-columns: repeat(2, 1fr); }
}