/* RESET BÁSICO */
*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}
body{
    font-family:'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height:1.6;
    color:#222;
    background:#fff;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
a{
    text-decoration:none;
    color:#00C2CB;
}
a:hover{
    text-decoration:underline;
}
img{
    max-width:100%;
    height:auto;
}

/* VARIABLES */
:root{
    --primary:#003366;
    --accent:#00C2CB;
    --light:#f8fafc;
    --dark:#0f172a;
    --max-width:1100px;
}

/* CABECERA */
header{
    background:var(--primary);
    color:#fff;
    padding:1rem 2rem;
}
.navbar{
    display:flex;
    align-items:center;
    justify-content:space-between;
    max-width:var(--max-width);
    margin:auto;
}
.navbar .logo{
    font-size:1.4rem;
    font-weight:700;
    letter-spacing:.5px;
}
.navbar ul{
    display:flex;
    gap:1.5rem;
    list-style:none;
}
.navbar a{
    color:#fff;
    font-weight:500;
}
.hero{
    background:url('../img/hero.jpg') center/cover no-repeat;
    height:70vh;
    display:flex;
    flex-direction:column;
    justify-content:center;
    align-items:center;
    text-align:center;
    color:#fff;
    padding:0 1rem;
}
.hero h1{
    font-size:2.5rem;
    margin-bottom:1rem;
}
.hero p{
    max-width:600px;
    margin-bottom:2rem;
    font-size:1.2rem;
}
.btn{
    background:var(--accent);
    color:#fff;
    padding:.75rem 1.5rem;
    border-radius:4px;
    transition:.3s;
    border-color: #009ba8;
}
.btn:hover{
    background:#009ba8;
}

/* SECCIONES GENÉRICAS */
section{
    padding:4rem 2rem;
    flex: 1; /* Ocupa todo el espacio disponible entre header y footer */
}
.container{
    max-width:var(--max-width);
    margin:auto;
}
.cards{
    display:grid;
    gap:2rem;
    grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
}
.card{
    background:var(--light);
    border:1px solid #e5e7eb;
    padding:2rem;
    border-radius:8px;
    text-align:center;
}

/* FOOTER PEGADO ABAJO */
footer{
    background:var(--dark);
    color:#fff;
    text-align:center;
    padding:2rem 1rem;
    font-size:.9rem;
    margin-top: auto; /* Empuja el footer hacia el fondo */
}
footer .social{
    margin-top:1rem;
}
footer .social a{
    margin:0 .5rem;
    color:#fff;
}

/* FORMULARIO */
.contact-form{
    display:grid;
    grid-template-columns: 150px minmax(0,1fr);
    align-items:center;
    gap: 12px 16px;
    max-width: 720px;
    margin: 2rem 0;
}
.contact-form label{
    font-weight:600;
}
.contact-form input,
.contact-form textarea{
    width:100%;
    padding:.75rem;
    border:1px solid #ccc;
    border-radius:4px;
    font-size:1rem;
}
.contact-form textarea{
    min-height:140px;
    resize:vertical;
}
.contact-form .actions{
    grid-column:2;
}
.contact-form button[type="submit"]{
    align-self:flex-start;
}

/* Responsive: 1 columna en móvil */
@media (max-width:640px){
    .contact-form{
        grid-template-columns:1fr;
    }
    .contact-form .actions{
        grid-column:1;
    }
}