html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    /* Fondo imagen a pantalla completa */
    background: url("https://images.pexels.com/photos/7203788/pexels-photo-7203788.jpeg") no-repeat center center fixed;
    background-size: cover;
    min-height: 100vh;
    font-family: 'Segoe UI', 'Inter', 'Arial', sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-outer {
    min-height: 100vh;
    width: 100vw;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card-blue {
    width: 430px;
    max-width: 98vw;
    border-radius: 1.5rem;
    box-shadow: 0 20px 64px 0 rgba(52, 76, 180, 0.20), 0 1.5px 12px 0 rgba(70, 120, 220, 0.09);
    background: #fff;
    overflow: hidden;
    margin: 3vh 1vw;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: relative;
}

.login-card-blue .login-image-top {
    width: 100%;
    height: 170px;
    background: #183b66;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.login-card-blue .login-image-top img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    border-top-left-radius: 1.5rem;
    border-top-right-radius: 1.5rem;
}

.login-card-blue .login-content {
    padding: 2.7rem 2.4rem 1.7rem 2.4rem;
    background: #fff;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: relative;
}

.login-card-blue h2 {
    font-weight: 800;
    font-size: 1.55rem;
    color: #28467a;
    letter-spacing: -1px;
    margin-bottom: 1.7rem;
    text-align: left;
}

.login-card-blue .form-group {
    margin-bottom: 1.10rem;
    position: relative;
}

/* INPUT FLAT Y DELGADO */
.login-card-blue .form-control {
    background: #e3edfb;
    border: none;
    border-radius: 10px;
    color: #254975;
    font-size: 1.03rem;
    font-weight: 500;
    box-shadow: none;
    padding: 0.73rem 1rem;
    transition: background .14s, border-color .13s;
    height: 2.1rem;
}

.login-card-blue .form-control:focus {
    background: #f3f8ff;
    outline: none;
    border: 1.4px solid #92b5e6;
}

.login-card-blue .form-control::placeholder {
    color: #8aa1c7;
    opacity: 1;
}

/* BOTÓN ANCHO Y RECTANGULAR */
.login-card-blue .btn-dark,
.login-card-blue .btn-primary {
    border-radius: 20px;
    background: linear-gradient(90deg, #404d8c 60%, #7863d6 100%);
    color: #fff;
    border: none;
    font-weight: 700;
    box-shadow: 0 2px 10px #b2cdf644;
    font-size: 1.13rem;
    width: 100%;
    margin-top: 20px;
    transition: background .12s, box-shadow .12s;
    height: 2.3rem;
    display: block;
}

.login-card-blue .btn-dark:hover,
.login-card-blue .btn-primary:hover {
    background: linear-gradient(90deg, #667cdf 60%, #927bff 100%);
    color: #fff;
    box-shadow: 0 6px 18px #b2cdf655;
}

.login-card-blue .register {
    color: #4172bb;
    font-size: 1rem;
    margin-top: 1.1rem;
    text-align: center;
}

.login-card-blue .register a {
    color: #28467a;
    font-weight: 600;
    text-decoration: underline;
}

.alert-danger {
    border-radius: 1rem;
    background: #e3edfb;
    border: none;
    color: #244689;
    font-weight: 600;
    width: 100%;
    margin-bottom: 1rem;
    text-align: center;
}

@media (max-width: 600px) {
    .login-card-blue {
        width: 99vw;
        min-width: 0;
        padding: 0;
    }

    .login-card-blue .login-content {
        padding: 1.4rem 0.2rem 0.8rem 0.2rem;
    }
}