body {
    font-family: 'Noto Sans JP', sans-serif;
    overflow-x: hidden;
}

/* --- フェードインアニメーション --- */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}
.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }

.text-gradient {
    background: linear-gradient(135deg, #4f46e5 0%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --- バウンドエフェクト --- */
.pop-hover {
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease;
}
.pop-hover:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}
.pop-hover:active { transform: scale(0.98); }

/* --- パーティクル（紙吹雪）の基本スタイル --- */
.confetti {
    position: fixed;
    top: 0;
    left: 0;
    width: 8px;
    height: 8px;
    pointer-events: none;
    z-index: 9999;
    border-radius: 2px; /* 少し四角くして紙吹雪感を出す */
}

/* --- 背景装飾 --- */
.blob {
    position: absolute;
    filter: blur(40px);
    z-index: -1;
    opacity: 0.4;
    animation: float 10s infinite ease-in-out alternate;
}
@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(20px, 40px); }
}

/* --- スクリーンショットスライダー --- */
.screenshot-slider {
    aspect-ratio: 16 / 10;
    max-height: 300px;
}

.slider-container {
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: relative;
}

.slider-track {
    height: 100%;
    will-change: transform;
    display: flex;
}

.slider-slide {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 100%;
}

.slider-slide img {
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.slider-slide:hover img {
    transform: scale(1.02);
}

.slider-btn {
    z-index: 10;
    opacity: 0.8;
}

.slider-btn:hover {
    opacity: 1;
}

.slider-dots {
    z-index: 10;
}

.slider-dot {
    cursor: pointer;
    border: none;
    padding: 0;
}

.slider-dot.active {
    background-color: rgba(255, 255, 255, 1) !important;
    transform: scale(1.3);
}

.slider-dot:hover {
    transform: scale(1.2);
}

.slider-dot.active:hover {
    transform: scale(1.4);
}

/* 単一画像表示 */
.screenshot-single {
    aspect-ratio: 16 / 10;
    max-height: 300px;
    border-radius: 0.5rem;
    overflow: hidden;
    cursor: pointer;
}

.screenshot-single img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.screenshot-single:hover img {
    transform: scale(1.05);
}

/* --- モーダル --- */
.modal {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.modal.hidden {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    animation: slideUp 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.modal-close {
    font-size: 3rem;
    line-height: 1;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

.modal-slider-container {
    position: relative;
    max-height: 90vh;
    overflow: hidden;
}

.modal-slider-track {
    display: flex;
    height: 100%;
    will-change: transform;
}

.modal-slider-track img {
    min-width: 100%;
    height: auto;
    max-height: 90vh;
    object-fit: contain;
    display: block;
}

.modal-btn {
    opacity: 0.9;
}

.modal-btn:hover {
    opacity: 1;
}

.modal-dots {
    z-index: 10;
}

.modal-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.modal-dot.active {
    background: white;
    transform: scale(1.3);
}

.modal-dot:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: scale(1.2);
}