@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;700&display=swap');
/* @import for Tailwind pre-compilation is usually done here if not using CDN */

body {
    font-family: 'Inter', sans-serif;
    /* ダークテーマからライトテーマへ変更 */
    background-color: #f8f8f8; /* 非常に薄いグレー */
    color: #1a202c; /* ダークグレーのテキスト */
    scroll-behavior: smooth;
}
.section {
    padding: 8rem 2rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.section.visible {
    opacity: 1;
    transform: translateY(0);
}
/* 🔽 以前の .header-bg, .header-bg img, .header-bg::after, .header-content のスタイルを削除 🔽 */
/* 動画背景のスタイルは、index.html の Tailwind クラス (header-video-bg, h-screen, absolute, z-10など) で処理されます */
/* 🔼 削除 🔼 */

/* Utility classes defined by @apply (Tailwind is required for this) */
.btn {
    padding: 0 2rem; /* px-8 */
    padding-top: 0.75rem; /* py-3 */
    padding-bottom: 0.75rem; /* py-3 */
    border-radius: 9999px; /* rounded-full */
    font-weight: 700; /* font-bold */
    transition: all 0.3s ease; /* transition-all duration-300 */
    transform: scale(1); /* transform base */
}
.btn:hover {
    transform: scale(1.05); /* hover:scale-105 */
}
.btn-primary {
    background-color: #06b6d4; /* bg-cyan-500 */
    color: #ffffff; /* text-white */
}
.btn-primary:hover {
    background-color: #0891b2; /* hover:bg-cyan-600 */
}
.btn-secondary {
    /* ライトテーマに合わせて変更 */
    background-color: transparent; /* bg-transparent */
    border: 2px solid #ffffff; /* border-2 border-white */
    color: #ffffff; /* text-white */
}
.btn-secondary:hover {
    background-color: #ffffff; /* hover:bg-white */
    color: #06b6d4; /* hover:text-cyan-500 */
}
.glass-card {
    /* ライトテーマに合わせて変更 */
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}
.news-item {
    /* ライトテーマに合わせて変更 */
    background-color: #ffffff;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid #e2e8f0;
}
.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}
.member-card {
    background-color: #ffffff; /* bg-white */
    border-radius: 0.5rem; /* rounded-lg */
    padding: 1.5rem; /* p-6 */
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1); /* shadow-lg */
    transition: all 0.3s ease; /* transition-all duration-300 */
}
.member-card:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1); /* hover:shadow-xl */
    transform: translateY(-8px); /* hover:-translate-y-2 */
}
.char-card:hover .char-img {
    transform: scale(1.1);
}
.char-img {
    transition: transform 0.3s ease;
}
.nav-link {
    position: relative;
    display: inline-block;
    padding-bottom: 5px;
}
.nav-link::after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: #06b6d4;
    transform-origin: bottom right;
    transition: transform 0.25s ease-out;
}
.nav-link:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}
.hamburger-menu {
    display: block;
    cursor: pointer;
    width: 30px;
    height: 20px;
    position: relative;
}
.hamburger-menu span {
    display: block;
    width: 100%;
    height: 2px;
    /* ライトテーマに合わせて変更 */
    background-color: #1a202c;
    position: absolute;
    left: 0;
    transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
}
.hamburger-menu span:nth-child(2) { top: 8px; }
.hamburger-menu span:nth-child(3) { top: 16px; }

.hamburger-menu.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger-menu.open span:nth-child(2) { opacity: 0; }
.hamburger-menu.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
.slide-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-in-out, padding 0.5s ease-in-out;
    padding-top: 0;
    padding-bottom: 0;
}
.slide-menu.open {
    max-height: 500px;
    padding-top: 1rem;
    padding-bottom: 1rem;
}
.news-detail-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* ライトテーマに合わせて変更 */
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    overflow-y: auto;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}
.news-detail-container.open {
    visibility: visible;
    opacity: 1;
}
.news-detail-content {
    /* ライトテーマに合わせて変更 */
    background: #ffffff;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    position: relative;
    transform: translateY(20px);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
}
.news-detail-container.open .news-detail-content {
    transform: translateY(0);
    opacity: 1;
}

/* --- 追加するCSSコード --- */

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-slide-down {
    animation: slideDown 0.5s ease-out forwards;
}

/* --- ページ遷移アニメーション用のCSS追加 --- */

/* ローディング画面の基本スタイル */
#loading-overlay {
    /* Tailwindのz-[1000]を指定 */
    z-index: 1000; 
    /* 初期状態は表示 */
    visibility: visible;
    opacity: 1;
    transition: opacity 0.5s ease-out, visibility 0.5s ease-out;
}

/* スライドアウトアニメーションのキーフレーム */
@keyframes slideOutTop {
    to {
        transform: translateY(-100%);
    }
}
@keyframes slideOutBottom {
    to {
        transform: translateY(100%);
    }
}

/* 中央のアイコンをフェードアウトさせるキーフレーム */
@keyframes fadeOutCenter {
    to {
        opacity: 0;
        transform: scale(0.5);
    }
}

/* アニメーション適用時のクラス */
.slide-out-center {
    animation: fadeOutCenter 0.3s ease-in forwards;
}

.slide-out-top {
    animation: slideOutTop 0.5s ease-in-out forwards;
}

.slide-out-bottom {
    animation: slideOutBottom 0.5s ease-in-out forwards;
}

/* 分割要素のスタイル */
#overlay-top, #overlay-bottom {
    /* Tailwindのz-indexよりも高い値を指定して、アイコンの上に配置 */
    z-index: 1001; 
}