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

html, body {
    height: 100%;
    width: 100%;
    font-family: 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'Meiryo', sans-serif;
    overflow: hidden;
}

body {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Background Image */
.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* Content Wrapper */
.content-wrapper {
    position: relative;
    z-index: 3;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.content {
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    padding: 3rem 2rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    animation: fadeInUp 1s ease-out both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-container {
    text-align: center;
    margin-bottom: 2rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 15px;
    border: 2px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.logo-image {
    max-width: 400px;
    width: 100%;
    height: auto;
    filter: drop-shadow(1px 1px 3px rgba(0, 0, 0, 0.3));
}

.message {
    font-size: 2.5rem;
    font-weight: bold;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    margin-top: 2rem;
}

.thanks-message {
    font-size: 1.3rem;
    color: white;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    margin-top: 1.5rem;
    line-height: 1.6;
    opacity: 0.95;
}

/* Responsive Design */
@media (max-width: 768px) {
    .content {
        padding: 1.5rem 1rem;
    }

    .logo-image {
        max-width: 300px;
    }

    .message {
        font-size: 1.8rem;
    }

    .thanks-message {
        font-size: 1.1rem;
    }

    .content-wrapper {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .logo-container {
        padding: 1rem;
    }

    .logo-image {
        max-width: 250px;
    }

    .message {
        font-size: 1.5rem;
    }

    .thanks-message {
        font-size: 1rem;
    }
}