:root {
    --primary-color: #ffffff;
    --background-color: #121212;
    --accent-color: #BD2020;
    /* Subtle red for accents */
    --text-color: #f0f0f0;
    --font-main: 'Shippori Mincho', serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.3s;
}

a:hover {
    opacity: 0.7;
}

/* Utils */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
    opacity: 0;
    /* JS Fade-in */
    transform: translateY(20px);
    transition: opacity 1s ease-out, transform 1s ease-out;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: 0.2em;
    font-weight: 700;
}

/* Hero Section */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    /* Fallback */
    height: 100dvh;
    /* Dynamic Viewport Height for mobile */
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
}

.video-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    /* Dark overlay */
    z-index: 2;
}

.hero-content {
    position: absolute;
    top: 40px;
    width: 100%;
    z-index: 3;
    text-align: center;
    mix-blend-mode: overlay;
    /* Cool effect */
}

.hero-title {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.hero-title .en {
    font-size: 4rem;
    letter-spacing: 0.2em;
    font-weight: bold;
    text-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.hero-title .jp {
    font-size: 2rem;
    letter-spacing: 0.1em;
    font-weight: normal;
}

/* Scroll Down Indicator */
.scroll-down {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    text-align: center;
    animation: bounce 2s infinite;
}

.scroll-down span {
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    display: block;
    margin-bottom: 10px;
}

.scroll-down .arrow {
    width: 1px;
    height: 60px;
    background: #fff;
    margin: 0 auto;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    40% {
        transform: translateX(-50%) translateY(-10px);
    }

    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Profile Section */
.profile-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
}

.profile-image {
    flex: 1;
    max-width: 400px;
}

.profile-image img {
    width: 100%;
    height: auto;
    filter: grayscale(100%);
    transition: filter 0.5s;
}

.profile-image img:hover {
    filter: grayscale(0%);
}

.profile-text {
    flex: 1;
    text-align: left;
}

.profile-text p {
    font-size: 1.1rem;
    line-height: 2.2;
    letter-spacing: 0.05em;
}

/* Lyric Section */
.lyric-container {
    text-align: center;
}

.song-title {
    font-size: 1.8rem;
    margin-bottom: 40px;
}

.lyrics-text {
    font-size: 1.1rem;
    line-height: 2.4;
    letter-spacing: 0.05em;
}

.verse,
.hook {
    margin-bottom: 60px;
}

.section-label {
    font-size: 0.9rem;
    color: #888;
    margin-bottom: 15px;
    font-family: sans-serif;
    letter-spacing: 1px;
}

/* News Section */
.news-item {
    border-top: 1px solid #333;
    border-bottom: 1px solid #333;
    padding: 30px 0;
    text-align: center;
    transition: background 0.3s;
}

.news-item:hover {
    background: #1a1a1a;
}

.news-item .date {
    display: block;
    font-size: 0.9rem;
    color: #888;
    margin-bottom: 10px;
}

.news-item .title {
    font-size: 1.2rem;
}

/* SNS Section */
.sns-links {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.sns-btn {
    padding: 15px 40px;
    border: 1px solid #fff;
    border-radius: 50px;
    font-size: 1rem;
    letter-spacing: 0.1em;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.sns-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: #fff;
    z-index: -1;
    transition: width 0.3s ease;
}

.sns-btn:hover {
    color: #000;
}

.sns-btn:hover::before {
    width: 100%;
}

/* Footer */
footer {
    padding: 40px 0;
    text-align: center;
    font-size: 0.8rem;
    color: #666;
    border-top: 1px solid #222;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title .en {
        font-size: 2rem;
    }

    .hero-title .jp {
        font-size: 1.2rem;
    }

    .profile-container {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }

    .sns-links {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }

    .sns-btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }

    .profile-text {
        text-align: left;
        width: 100%;
    }

    .profile-image {
        max-width: 80%;
    }

    .section {
        padding: 60px 0;
    }

    h2 {
        font-size: 2rem;
        margin-bottom: 40px;
    }
}

.youtube-wrap {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    /* 16:9 */
}

.youtube-wrap iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}