:root {
    --bg-color: #fdfdfd;
    --text-color: #1a1a1a;
    --accent-color: #4a6741;
    --sub-text: #777;
    --font-serif: 'Noto Serif JP', serif;
    --font-sans: 'Montserrat', 'Noto Sans JP', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-serif);
    line-height: 1.8;
    overflow-x: hidden;
    letter-spacing: 0.05em;
}

nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: rgba(253, 253, 253, 0.8);
    backdrop-filter: blur(10px);
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 100px;
    /* ナビゲーションに最適なサイズに調整しました */
    width: auto;
    /* 横幅は自動計算にして比率を維持します */
    display: block;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 2rem;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    font-family: var(--font-sans);
    font-size: 0.8rem;
    transition: 0.3s;
}

nav ul li a:hover {
    color: var(--accent-color);
}

.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 0 5%;
}

.hero-title {
    font-size: clamp(2rem, 8vw, 5rem);
    font-weight: 300;
    margin-bottom: 1rem;
}

.hero-copy {
    writing-mode: vertical-rl;
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.9rem;
    color: var(--sub-text);
}

section {
    padding: 8rem 10%;
}

.section-title {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.4em;
    color: var(--accent-color);
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
}

.section-title::after {
    content: "";
    height: 1px;
    width: 50px;
    background: var(--accent-color);
    margin-left: 1rem;
}

.members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 4rem;
}

.member-image {
    width: 100%;
    aspect-ratio: 1 / 1;
    background: #f0f0f0;
    margin-bottom: 1.5rem;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
}

.member-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-card:hover .member-image {
    transform: scale(0.97);
}

.news-item {
    padding: 1.5rem 0;
    border-bottom: 1px solid #eee;
    display: flex;
    gap: 2rem;
}

.song-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 4rem 2rem;
    list-style: none;
    margin-top: 2rem;
}

.song-card a {
    text-decoration: none;
    color: var(--text-color);
    display: block;
}

.song-cover {
    position: relative;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    margin-bottom: 1.2rem;
    background-color: #f0f0f0;
    transition: transform 0.3s ease;
}

.song-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.song-card:hover .song-cover img {
    transform: scale(1.08);
}

.song-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.song-card:hover .song-overlay {
    opacity: 1;
}

.song-overlay span {
    color: #fff;
    font-size: 0.7rem;
    font-family: var(--font-sans);
    border: 1px solid #fff;
    padding: 0.6rem 1.2rem;
    letter-spacing: 0.2em;
    backdrop-filter: blur(4px);
}

.song-title {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    text-align: center;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* Typography & Details */
.hero-subtext {
    font-size: 0.9rem;
}

.philosophy-description {
    margin-top: 2rem;
    font-size: 1rem;
    color: var(--sub-text);
}

footer {
    padding: 4rem 5%;
    text-align: center;
    border-top: 1px solid #eee;
}

.footer-copy {
    font-size: 0.7rem;
    color: var(--sub-text);
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1.2s ease, transform 1.2s ease;
}

.fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    .hero-copy {
        display: none;
    }

    nav ul {
        display: none;
    }
}