nav.m_nav {
    position:fixed;
    top:0;
    left:0;
    z-index:998;
    overflow:hidden;
    transform:translateY(-100%);
    width:100%;
    height:100vh;
    transition:all 800ms cubic-bezier(.8,0,.33,1);
    border-radius:0 0 50% 50%;
}
nav.m_nav.nav-open {
    transform:translateY(0);
    border-radius:0% 0% 0% 0%;
    background:rgba(0,0,0,.8);
}
.menu-btn {
    top:35px;
    right:20px;
    position:fixed;
    cursor:pointer;
    z-index:999;
    color:#fff;
}
.menu-btn .line {
    padding:0;
    width:30px;
    background:#fff;
    height:2px;
    margin:5px 10px;
    transition:all 700ms cubic-bezier(.9,0,.33,1);
}
.menu-btn .line.line--1 {
    width:30px;
    transform:rotate(0) translateY(0);
}
.menu-btn .line.line--1.line-cross {
    width:30px;
    transform:rotate(45deg) translateY(2px) translateX(4px);
    background:rgba(255,255,255,1);
}
.menu-btn .line.line--2 {
    width:28px;
    transform:translateX(0);
}
.menu-btn .line.line--2.line-fade-out {
    width:28px;
    transform:translate(30px);
    opacity:0;
}
.menu-btn .line.line--3 {
    width:20px;
    transform:rotate(0) translateY(0);
}
.menu-btn .line.line--3.line-cross {
    width:30px;
    transform:rotate(-45deg) translateY(-7px) translateX(7px);
    background:rgba(255,255,255,1);
}
nav.m_nav .nav-links {
    position:absolute;
    left:0;
    top:0;
    width:100%;
    height:100%;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    transform:translateY(0);
    opacity:0;
    transition:all 900ms cubic-bezier(.9,0,.33,1);
}
nav.m_nav .nav-links ul {
    width:100%;
}
nav.m_nav .nav-links.fade-in {
    opacity:1;
    transform:translateY(0);
}
nav.m_nav .nav-links .link {
    border-bottom:1px solid rgba(255,255,255,0.3);
    width:96%;
    max-width:400px;
    margin:0 auto;
    display:block;
    padding:15px 0;
    color:#fff;
    font-weight:bold;
    font-size:1.6rem;
    transition:all 300ms cubic-bezier(.9,0,.33,1);
}
.m_nav_tel,.m_nav_tel a {
    font-size:1.8rem;
    color:#fff;
}
nav.m_nav .nav-links .link:hover {
    background:rgba(255,255,255,0.5);
}