body {
    display: flex;
    min-height: 100vh;
    flex-direction: column;
    font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'Hiragino Kaku Gothic ProN', '游ゴシック Medium', meiryo, sans-serif;
}
nav form {
    margin: 0 0 0 auto;
    width: 60%;
}

main {
    flex: 1 0 auto;
}


.gizabottom {
    position: relative;
}
.gizabottom:after {
    position: absolute;
    top: 100%;
    left: 0;
    content: "";
    width: 100%;
    height: 1rem;
    background:
    linear-gradient(-135deg, #ec407a 8px, transparent 0) 0 8px,
    linear-gradient(135deg, #ec407a 8px, #fff 0) 0 8px;
    background-color: #ec407a;
    background-position: left bottom !important;
    background-repeat: repeat-x !important;
    background-size: 16px 16px;
}