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

body {
    font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Meiryo', sans-serif;
    line-height: 1.5;
    color: #333;
    background: #000;
}

.container {
    max-width: 375px;
    margin: 0 auto;
    background: #000;
    min-height: 100vh;
}

/* Hero Section */
.hero-section {
    width: 100%;
}

.hero-image {
    width: 100%;
    height: auto;
    display: block;
}

/* Section Headers */
.section-header {
    margin: 20px 0 0 0;
    padding: 0;
}

.red-header {
    background: #e30613;
    padding: 12px 0;
    text-align: center;
    border-radius: 8px 8px 0 0;
    margin: 20px 15px 0 15px;
}

.red-header h2 {
    color: white;
    font-size: 1.2rem;
    font-weight: bold;
    margin: 0;
}

/* Content Boxes */
.content-box {
    background: white;
    margin: 0 15px 0 15px;
    padding: 20px;
    border-radius: 0 0 12px 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Event Items */
.event-item {
    margin-bottom: 20px;
}

.event-item:last-child {
    margin-bottom: 0;
}

.event-item h3 {
    color: #e30613;
    font-size: 1rem;
    font-weight: bold;
    margin-bottom: 5px;
}

.event-item p {
    color: #333;
    font-size: 0.9rem;
    line-height: 1.4;
}

/* Rule Items */
.rule-item h3 {
    color: #e30613;
    font-size: 1rem;
    font-weight: bold;
    margin-bottom: 8px;
}

.rule-item p {
    color: #333;
    font-size: 0.9rem;
    line-height: 1.5;
}

.red-text {
    color: #e30613;
    font-weight: bold;
}

.small-text {
    font-size: 0.8rem;
    color: #666;
}

/* Prize Section */
.prize-box {
    margin-bottom: 25px;
    text-align: center;
}

.prize-text {
    color: #333;
    font-size: 0.9rem;
    margin-bottom: 8px;
    line-height: 1.4;
}

.prize-box h3 {
    background: #f0f0f0;
    border: 2px solid #ccc;
    border-radius: 8px;
    padding: 15px;
    margin: 10px 0;
    font-size: 1rem;
    font-weight: bold;
    color: #333;
}

.prize-list {
    margin: 15px 0;
}

.prize-list p {
    background: #f0f0f0;
    border: 2px solid #ccc;
    border-radius: 8px;
    padding: 12px;
    margin: 8px 0;
    font-size: 0.9rem;
    color: #333;
}

/* Registration Button */
.registration-button {
    background: #e30613;
    color: white;
    border: none;
    padding: 12px 40px;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 25px;
    cursor: pointer;
    margin: 20px 0;
    width: 100%;
    max-width: 200px;
    display: block;
    margin-left: auto;
    margin-right: auto;
    font-family: inherit;
    transition: background 0.2s ease;
}

.registration-button:hover {
    background: #c5050f;
}

/* Shipping Info */
.shipping-info {
    margin-top: 25px;
}

.shipping-info h3 {
    color: #e30613;
    font-size: 1rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.shipping-info ul {
    list-style: none;
    padding: 0;
}

.shipping-info li {
    color: #333;
    font-size: 0.85rem;
    line-height: 1.4;
    margin-bottom: 5px;
    position: relative;
    padding-left: 8px;
}

.shipping-info li:before {
    content: "・";
    position: absolute;
    left: 0;
    color: #e30613;
}

/* Footer */
footer {
    background: #000;
    text-align: center;
    padding: 30px 0 40px 0;
}

.footer-logo {
    height: 30px;
    width: auto;
}

/* Responsive adjustments */
@media (max-width: 375px) {
    .container {
        max-width: 100%;
    }
    
    .red-header {
        margin: 20px 10px 0 10px;
    }
    
    .content-box {
        margin: 0 10px 0 10px;
        padding: 15px;
    }
    
    .red-header h2 {
        font-size: 1.1rem;
    }
    
    .event-item h3,
    .rule-item h3,
    .shipping-info h3 {
        font-size: 0.95rem;
    }
    
    .event-item p,
    .rule-item p,
    .prize-text {
        font-size: 0.85rem;
    }
    
    .registration-button {
        font-size: 1rem;
        padding: 10px 35px;
    }
}