body {
    font-family: 'Cinzel', 'Noto Sans JP', serif;
    color: #fff;
    margin: 0;
    padding: 0;
    overflow: hidden;
    position: relative;
    text-align: center;
}

/* 背景のエフェクト */
.casino-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #1e9f6f;
    background-image:
        radial-gradient(circle, #333 1px, transparent 1px),
        radial-gradient(circle, #333 1px, transparent 1px);
    background-size: 50px 50px;
    background-position: 0 0, 25px 25px;
    opacity: 0.8;
    z-index: -1;
}

.container {
    padding: 20px;
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.game-title {
    font-size: 2.5em;
    font-weight: bold;
    text-shadow: 0 0 10px gold, 0 0 20px gold, 0 0 30px #a56111;
    margin-bottom: 20px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.main-image {
    max-width: 100%;
    margin-bottom: 30px;
}

.main-image img {
    width: 100%;
    height: auto;
    border: 5px solid gold;
    box-shadow: 0 0 15px rgba(255, 215, 0, 0.5);
    border-radius: 10px;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    width: 100%;
}

.menu-button {
    display: block;
    padding: 15px 20px;
    background-color: #ff6e61;
    color: #fff;
    text-decoration: none;
    font-size: 1.2em;
    font-weight: bold;
    border: 3px solid #ffde00;
    border-radius: 5px;
    transition: background-color 0.3s ease, transform 0.2s ease;
    text-shadow: 1px 1px 2px #333;
}

.menu-button:hover, .menu-button:active {
    background-color: #e09400;
    transform: translateY(-2px);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.3);
}

.disclaimer {
    margin-top: 30px;
    font-size: 0.8em;
    color: rgba(255, 255, 255, 0.6);
}

/* スマホ対応 */
@media (max-width: 768px) {
    .game-title {
        font-size: 2em;
    }
    .main-image {
        margin-bottom: 20px;
    }
    .menu-button {
        padding: 12px 15px;
        font-size: 1.1em;
    }
    .disclaimer {
        font-size: 0.7em;
    }
}