:root {
    --accent-color: #5AA3FF;
}

body {
    margin: 0;
    font-family: 'Noto Sans JP', sans-serif;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: transparent;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
}

.logo {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: #333;
}

.logo-img {
    height: 60px;
    width: auto;
    display: block;
}

/* ハンバーガー（3本線） */
.hamburger {
    width: 44px;
    height: 44px;
    background-color: var(--accent-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    position: relative;
    z-index: 1100;
}

.bar {
    position: absolute;
    width: 20px;
    height: 3px;
    background: #fff;
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.top {
    transform: translateY(-8px);
}

.middle {
    transform: translateY(0);
}

.bottom {
    transform: translateY(8px);
}

/* ×状態（オープン時） */
.hamburger.open .top {
    transform: rotate(45deg);
}

.hamburger.open .middle {
    opacity: 0;
}

.hamburger.open .bottom {
    transform: rotate(-45deg);
}

/* フルスクリーンメニュー */
.menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--accent-color);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.95);
    transition: all 0.3s ease;
}

.menu.open {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

.menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: center;
}

.menu li {
    margin-bottom: 1.5rem;
}

.menu a {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8rem;
    color: #fff;
    text-decoration: none;
    position: relative;
    display: inline-block;
    padding-left: 4px;
}

/* 下線アニメーション */
.menu a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 0;
    height: 2px;
    background: #fff;
    transition: width 0.3s ease;
}

.menu a:hover::after {
    width: 100%;
}

/* フッター */
.site-footer {
    background-color: #3B82F6;
    color: #fff;
    padding: 2rem 1.5rem;
    font-size: 0.9rem;
}

.footer-inner {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.footer-logo img {
    max-width: 180px;
    margin-bottom: 1rem;
}

.footer-content {
    display: flex;
    justify-content: center;
    gap: 40px;
    align-items: center;
    margin-bottom: 1rem;
}

.footer-nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.footer-nav a {
    color: #fff;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.footer-nav a:hover {
    opacity: 0.7;
}

.footer-x img {
    width: 32px;
    height: 32px;
}

.footer-x img:hover{
    opacity: .7;
}

.footer-privacy a {
    color: #fff;
    font-size: 0.8rem;
    text-decoration: underline;
    display: inline-block;
    margin-bottom: 1rem;
}

.footer-copy {
    font-size: 0.8rem;
}


/* 1280pxpx */
@media (max-width: 1280px) {}

/* 768px */
@media (max-width: 768px) {}

/* 480px */
@media (max-width: 480px) {
    .logo-img {
        height: 40px;
    }

    .menu a:hover::after {
        width: 0%;
    }

    .site-footer {
        padding: 12px 24px;
    }

    .footer-content{
        gap: 20px;
    }

    .footer-nav ul {
        justify-content: left;
        gap: 12px;
    }

    .footer-copy {
        font-size: 0.6rem;
    }

}