/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Hiragino Sans', 'Hiragino Kaku Gothic Pro', 'Yu Gothic', 'Meiryo', sans-serif;
    line-height: 1.7;
    color: #333;
    background-color: #fff;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: linear-gradient(135deg, #dc143c 0%, #b91c3c 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

header .subtitle {
    font-size: 1.2rem;
    margin-bottom: 20px;
    opacity: 0.9;
}

.authors {
    margin-top: 20px;
    font-size: 0.9rem;
    opacity: 0.8;
}

.authors a {
    color: #fff;
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
}

.authors a:hover {
    border-bottom: 1px solid #fff;
    opacity: 1;
}

/* Main content */
main {
    background-color: #fff;
    padding: 40px 0;
}

article {
    background-color: #fff;
    border-radius: 8px;
    padding: 40px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 40px;
}

/* Sections */
section {
    margin-bottom: 50px;
}

section:last-child {
    margin-bottom: 0;
}

h2 {
    color: #dc143c;
    font-size: 2rem;
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 3px solid #dc143c;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: #ff6b6b;
}

h3 {
    color: #b91c3c;
    font-size: 1.4rem;
    margin-bottom: 15px;
    margin-top: 30px;
}

p {
    margin-bottom: 20px;
    text-align: justify;
    font-size: 1.1rem;
}

/* Lists */
ul {
    margin-bottom: 20px;
    padding-left: 20px;
}

ul li {
    margin-bottom: 8px;
    position: relative;
}

ul li::before {
    content: '⚾';
    position: absolute;
    left: -20px;
    color: #dc143c;
}

ul li strong {
    color: #dc143c;
}

/* Images */
.main-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 30px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Content grid */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 40px;
    align-items: start;
    margin: 30px 0;
}

.text-content {
    padding-right: 20px;
}

/* Special sections */
.intro {
    background: linear-gradient(135deg, #ffe6e6 0%, #fff0f0 100%);
    padding: 40px;
    border-radius: 12px;
    border-left: 5px solid #dc143c;
    margin-bottom: 50px;
}

.intro h2 {
    border-bottom: none;
    margin-bottom: 30px;
}

.intro h2::after {
    display: none;
}

.safety {
    background-color: #fff5f5;
    padding: 40px;
    border-radius: 12px;
    border: 2px solid #ffcccb;
}

.strategy {
    background: linear-gradient(135deg, #f0f8ff 0%, #e6f3ff 100%);
    padding: 40px;
    border-radius: 12px;
    border-left: 5px solid #4169e1;
}

.strategy h2 {
    color: #4169e1;
    border-bottom: 3px solid #4169e1;
}

.strategy h2::after {
    background-color: #87ceeb;
}

.community {
    background-color: #f8fff8;
    padding: 40px;
    border-radius: 12px;
    border: 2px solid #90ee90;
}

.getting-started {
    background: linear-gradient(135deg, #fff8dc 0%, #ffefd5 100%);
    padding: 40px;
    border-radius: 12px;
    border-left: 5px solid #daa520;
}

.getting-started h2 {
    color: #b8860b;
    border-bottom: 3px solid #daa520;
}

.getting-started h2::after {
    background-color: #f0e68c;
}

.legend {
    background: linear-gradient(135deg, #f5f0ff 0%, #f0e6ff 100%);
    padding: 40px;
    border-radius: 12px;
    border: 2px solid #da70d6;
    position: relative;
}

.legend::before {
    content: '🏆';
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 2rem;
}

.conclusion {
    background: linear-gradient(135deg, #dc143c 0%, #b91c3c 100%);
    color: white;
    padding: 50px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 6px 12px rgba(220, 20, 60, 0.3);
}

.conclusion h2 {
    color: white;
    border-bottom: 3px solid white;
    text-align: center;
}

.conclusion h2::after {
    background-color: rgba(255, 255, 255, 0.7);
}

.conclusion p {
    font-size: 1.2rem;
    line-height: 1.8;
}

/* Footer */
footer {
    background-color: #2c2c2c;
    color: #ccc;
    padding: 30px 0;
    text-align: center;
    margin-top: 50px;
}

footer a {
    color: #dc143c;
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: #ff6b6b;
}

/* Responsive design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    header .subtitle {
        font-size: 1rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    article {
        padding: 20px;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .text-content {
        padding-right: 0;
    }
    
    h2 {
        font-size: 1.6rem;
    }
    
    h3 {
        font-size: 1.2rem;
    }
    
    p {
        font-size: 1rem;
    }
    
    .main-image {
        height: 200px;
    }
    
    .section-image {
        height: 200px;
    }
    
    section {
        margin-bottom: 30px;
    }
    
    .intro, .safety, .strategy, .community, .getting-started, .legend, .conclusion {
        padding: 25px;
    }
}

@media (max-width: 480px) {
    header {
        padding: 40px 0;
    }
    
    header h1 {
        font-size: 1.6rem;
    }
    
    .authors {
        font-size: 0.8rem;
    }
    
    .authors span {
        display: block;
        margin: 5px 0;
    }
    
    h2 {
        font-size: 1.4rem;
    }
    
    ul {
        padding-left: 15px;
    }
    
    ul li::before {
        left: -15px;
    }
}0, 0, 0.1);
}

.section-image {
    width: 100%;
    max-width: 400px;
    height: 250px;
    object-fit: cover;
    border-radius: 8px;
    margin: 20px 0;
    box-shadow: 0 4px 8px rgba(0,