/* 仮装行列用背景 */
body.costume-page {
    background: linear-gradient(135deg, #0288d1 0%, #03a9f4 40%, #81d4fa 100%);
    background-attachment: fixed;
    color: #81d4fa;
}


.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: transparent;
    pointer-events: none;
}

.bg-animation::before,
.bg-animation::after {
    content: "";
    position: absolute;
    background: rgba(255, 255, 255, 0.4);
    filter: blur(40px);
    border-radius: 50% 100% 50% 100%;
    animation: flowClouds 60s linear infinite;
}

/* 1つ目の雲の塊 */
.bg-animation::before {
    width: 600px;
    height: 200px;
    top: 15%;
    left: -600px;
    box-shadow: 
        200px 50px 0 0 rgba(255, 255, 255, 0.3),
        400px -20px 0 0 rgba(255, 255, 255, 0.2);
}

/* 2つ目の雲の塊（より低く、ゆっくり） */
.bg-animation::after {
    width: 800px;
    height: 300px;
    bottom: 10%;
    left: -800px;
    opacity: 0.3;
    animation-duration: 90s;
    animation-delay: -30s;
    box-shadow: 
        -300px 100px 0 0 rgba(255, 255, 255, 0.2),
        300px 50px 0 0 rgba(255, 255, 255, 0.1);
}

@keyframes flowClouds {
    0% { transform: translateX(0); }
    100% { transform: translateX(calc(100vw + 800px)); }
}

/* エントリーボタン */
.entry-btn-wrapper {
    margin-top: 40px;
    text-align: center;
}

.entry-btn {
    display: inline-block;
    padding: 18px 50px;
    background: linear-gradient(135deg, #0288d1 0%, #00bcd4 100%);
    color: #fff;
    text-decoration: none;
    font-size: 1.4rem;
    font-weight: 700;
    border-radius: 50px;
    box-shadow: 0 10px 30px rgba(0, 188, 212, 0.3);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.entry-btn:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 20px 50px rgba(0, 188, 212, 0.5);
    background: linear-gradient(135deg, #03a9f4 0%, #26c6da 100%);
}

.entry-btn i {
    margin-left: 10px;
    font-size: 1.1rem;
    transition: transform 0.3s ease;
}

.entry-btn:hover i {
    transform: translate(3px, -3px);
}

@media screen and (max-width: 767px) {
    .entry-btn {
        width: 100%;
        padding: 15px 30px;
        font-size: 1.2rem;
    }
}