* {
    margin: 0;
    padding: 0;
    font-family: 'Courier New', 'Osaka-Mono', monospace;
}

body {
    overflow-x: hidden;
    background: #f0f4f8;
    color: #2c3e50;
}

ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

p {
    color: #2c3e50;
    font-size: 16px;
    line-height: 30px;
    margin-bottom: 20px;
    word-wrap: break-word;
}

.header {
    display: none;
}

.tab-navigation {
    width: 100%;
    padding: 30px 0;
    background: #fff;
    border-bottom: 2px solid #3498db;
    overflow-x: auto;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.tab-nav-inner {
    display: flex;
    gap: 8px;
    padding: 0 40px;
    min-width: max-content;
}

.tab-nav-inner a {
    color: #2c3e50;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    padding: 12px 24px;
    background: #e8f4f8;
    border: 2px solid #3498db;
    border-radius: 8px;
    transition: all 0.3s;
    white-space: nowrap;
}

.tab-nav-inner a:hover {
    background: #3498db;
    color: #fff;
}

.baner-content {
    width: 100%;
    padding: 80px 40px 60px;
}

.tech-images {
    display: grid;
    gap: 20px;
    max-width: 900px;
    margin: 0 auto 50px;
}

.tech-images .tech-img {
    width: 100%;
    height: 500px;
    background: url(../img/banner_bg.jpg);
    background-size: cover;
    background-position: center;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.baner-content .text-content h2 {
    font-size: 42px;
    font-weight: 700;
    color: #2c3e50;
    letter-spacing: -0.5px;
    text-align: center;
}

#portfolio {
    padding: 60px 40px 100px;
}

.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.inner-container .row {
    margin: 0;
}

.inner-container .col-md-4 {
    display: none;
}

.inner-container .col-md-8 {
    width: 100%;
    padding: 0;
}

.content-box {
    background: #fff;
    border: 2px solid #3498db;
    border-radius: 8px;
    padding: 45px;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.projects-holder-3 h3 {
    font-size: 32px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 30px;
    letter-spacing: -0.5px;
}

.projects-holder-3 p {
    font-size: 16px;
    line-height: 30px;
    color: #2c3e50;
}

.projects-holder-3 img {
    display: none;
}

footer {
    background: #fff;
    border-top: 2px solid #3498db;
    padding: 60px 40px;
}

footer .logo a {
    color: #2c3e50;
    text-decoration: none;
    font-size: 20px;
    font-weight: 700;
    display: block;
    text-align: center;
    margin-bottom: 15px;
}

footer p {
    color: #7f8c8d;
    font-size: 13px;
    text-align: center;
    margin: 0;
}

@media (max-width: 767px) {
    .tab-nav-inner {
        padding: 0 20px;
    }
    
    .tab-nav-inner a {
        padding: 10px 18px;
        font-size: 13px;
    }
    
    .baner-content {
        padding: 60px 30px 50px;
    }
    
    .tech-images {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .tech-images .tech-img {
        height: 150px;
    }
    
    .baner-content .text-content h2 {
        font-size: 32px;
    }
    
    #portfolio {
        padding: 50px 30px 80px;
    }
    
    .content-box {
        padding: 30px 25px;
    }
    
    .projects-holder-3 h3 {
        font-size: 26px;
    }
}

/* containerの幅制限を解除 */
.container {
    max-width: none;
    width: 100%;
}