@font-face {
  font-family: 'MainFont'; 
  src: url('/assets/chirufont.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}
h2{
    font-size: 2.5em;
}
.show_blar{
    animation: letterSpacing 1.5s ease-out forwards, blurIn 1s ease-out forwards;
}
@keyframes blurIn {
    from {
        filter: blur(10px);
        opacity: 0;
    }
    to {
        filter: blur(0);
        opacity: 1;
    }
}

@keyframes letterSpacing {
    from {
        letter-spacing: 0.5em;
    }
    to {
        letter-spacing: 0.1em;
    }
}
h3{
    font-size: 1.75em;
    margin: 0.5em 0 ;
}
p{
    font-size: 1.25em;
}

html,body{
    margin: 0;
    padding: 0;
    width: 100%;
    background-color: #E5F5F6;
    font-family: 'MainFont', sans-serif;
    /* 20pxおきに薄い線を引く */
    background-image: 
        linear-gradient(0deg, transparent 24%, rgba(0, 0, 0, .05) 25%, rgba(0, 0, 0, .05) 26%, transparent 27%, transparent 74%, rgba(0, 0, 0, .05) 75%, rgba(0, 0, 0, .05) 76%, transparent 77%, transparent), 
        linear-gradient(90deg, transparent 24%, rgba(0, 0, 0, .05) 25%, rgba(0, 0, 0, .05) 26%, transparent 27%, transparent 74%, rgba(0, 0, 0, .05) 75%, rgba(0, 0, 0, .05) 76%, transparent 77%, transparent);
    background-size: 50px 50px;
}
select,form,input,option{
    font-family: 'MainFont', sans-serif;
}

header{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    min-height: 78px;
    padding: 14px 20px;
    box-sizing: border-box;
    transition: background-color 0.5s ease, box-shadow 0.3s ease;
    display: flex;
    z-index: 1000;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
header h1{
    margin: 0;
    font-size: clamp(1.5rem, 2vw, 2rem);
    color: #114b4b;
}
body.mv_overtop header{
    background-color: #639D9C88;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px rgba(17, 75, 75, 0.12);
}
.site_brand{
    display: inline-flex;
    align-items: center;
    color: inherit;
    text-decoration: none;
    position: relative;
    z-index: 2;
}
.site_notice{
    color: #992828;
    margin: 4px 0 0;
    font-size: 0.95rem;
}
.site_nav{
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
}
.site_nav a{
    color: #114b4b;
    text-decoration: none;
    font-size: 1rem;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.45);
    border: 1px solid rgba(17, 75, 75, 0.12);
    transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}
.site_nav a:hover,
.site_nav a:focus-visible{
    background: rgba(255, 255, 255, 0.82);
    border-color: rgba(17, 75, 75, 0.25);
    transform: translateY(-1px);
}
.menu_toggle{
    position: absolute;
    opacity: 0;
    pointer-events: none;
}
.menu_button{
    display: none;
    width: 52px;
    height: 52px;
    border-radius: 16px;
    border: 1px solid rgba(17, 75, 75, 0.16);
    background: rgba(255, 255, 255, 0.68);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
    position: relative;
    z-index: 2;
}
.menu_button:hover{
    transform: translateY(-1px);
}
.menu_button span{
    width: 22px;
    height: 2px;
    background: #114b4b;
    border-radius: 999px;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

@media (max-width: 820px){
    header{
        flex-wrap: wrap;
        gap: 14px;
    }

    .menu_button{
        display: inline-flex;
        margin-left: auto;
    }

    .site_nav{
        order: 3;
        width: 100%;
        margin-left: 0;
        padding: 8px;
        border-radius: 24px;
        background: rgba(255, 255, 255, 0.82);
        box-shadow: 0 14px 28px rgba(17, 75, 75, 0.14);
        border: 1px solid rgba(17, 75, 75, 0.08);
        display: grid;
        grid-template-columns: 1fr;
        gap: 8px;
        max-height: 0;
        opacity: 0;
        overflow: hidden;
        pointer-events: none;
        transition: max-height 0.3s ease, opacity 0.25s ease, padding 0.25s ease;
    }

    .site_nav a{
        text-align: center;
        background: rgba(99, 157, 156, 0.12);
    }

    .menu_toggle:checked ~ .site_nav{
        max-height: 320px;
        opacity: 1;
        pointer-events: auto;
    }

    .menu_toggle:checked + .menu_button span:nth-child(1){
        transform: translateY(8px) rotate(45deg);
    }

    .menu_toggle:checked + .menu_button span:nth-child(2){
        opacity: 0;
    }

    .menu_toggle:checked + .menu_button span:nth-child(3){
        transform: translateY(-8px) rotate(-45deg);
    }
}

    .menu_toggle:checked + .menu_button span:nth-child(3){
        transform: translateY(-8px) rotate(-45deg);
    }
}
footer{
    background-color: #047373;
    padding: 20px 0;
}
footer p{
    color: #9cc9c9;
    padding: 0 20px 0 20px;
    margin: 0;
}