:root{
  --azul: #0b2a4a;
  --borde: #d6d9dd;
  --fondo: #f6f7f9;
  --texto: #0b1220;
}

*{ box-sizing: border-box; }

body{
  margin: 0;
  padding: 24px;
  font-family: Arial, sans-serif;
  color: var(--texto);
  background: var(--fondo);
}

.wrap{
  max-width: 760px;
  margin: 0 auto;
}

.card{
  background: #fff;
  border: 1px solid #e7eaee;
  border-radius: 14px;
  padding: 22px;
}

.title{
  margin: 0 0 6px 0;
  font-size: 22px;
}

.subtitle{
  margin: 0 0 18px 0;
  color: #4b5563;
  font-size: 14px;
}

.form{
  display: grid;
  gap: 14px;
}

.field label{
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
}

.field input,
.field textarea{
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--borde);
  border-radius: 10px;
  outline: none;
  font-size: 15px;
  background: #fff;
}

.field textarea{
  resize: vertical;
  min-height: 110px;
}

.field input:focus,
.field textarea:focus{
  border-color: var(--azul);
  box-shadow: 0 0 0 4px rgba(11, 42, 74, 0.12);
}

.actions{
  margin-top: 4px;
  display: flex;
  justify-content: center;
}

.btn-azul{
  padding: 12px 18px;
  border: 0;
  border-radius: 10px;
  background: var(--azul);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  font-size: 16px;
}

.btn-azul:hover{ filter: brightness(1.05); }
.btn-azul:active{ transform: translateY(1px); }

.mensaje{
  text-align: center;
  font-size: 14px;
  margin-top: 6px;
  min-height: 18px;
}

.config-btn{
position:fixed;
top:20px;
right:20px;
width:50px;
height:50px;
background:var(--azul);
color:white;
display:flex;
align-items:center;
justify-content:center;
font-size:22px;
border-radius:50%;
text-decoration:none;
box-shadow:0 8px 20px rgba(0,0,0,0.15);
transition:all .2s ease;
}

.config-btn:hover{
background:#1d4ed8;
transform:scale(1.08);
}

.mensaje--ok{ color: #0f7a2a; }
.mensaje--error{ color: #b42318; }