body {
    margin: 0;
    background: linear-gradient(#0b2542, #04121f);
    font-family: "M PLUS Rounded 1c", "Noto Sans JP", sans-serif;
    color: #e9f4ff;
}

.global-nav {
    background: rgba(0, 35, 90, 0.92);
    border-bottom: 2px solid #5fc9ff;
    box-shadow: 0 0 12px rgba(120, 180, 255, 0.4);

    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 9999;
}

.global-nav a {
    color: #dff2ff;
    font-weight: bold;
    padding: 6px 14px;
    text-decoration: none;
    transition: 0.25s;
}

.global-nav a:hover {
    background: rgba(100, 170, 255, 0.35);
    color: #fff;
}


/* スクロールすると少し縮む演出 */
.global-nav.shrink {
    padding: 6px 0;
    backdrop-filter: blur(4px);
}

/* ヘッダー */
.vb-header {
    text-align: center;
    padding: 30px 10px;
    background: rgba(0, 40, 90, 0.85);
    border-bottom: 2px solid #ffc15e;
}

.vb-header h1 {
    margin: 0;
    font-size: 2rem;
}

.vb-header p {
    margin-top: 6px;
    color: #ffdba8;
    font-size: 0.9rem;
}

/* メイン */
.vb-wrapper {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

/* スライダー */
.vb-slider {
    position: relative;
    width: 100%;
    max-width: 900px;
    margin: auto;
    height: 420px;
    overflow: hidden;
    border-radius: 18px;
}

.vb-slider img {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    display: none;
}

.vb-slider img:first-child {
    display: block;
}

/* キャッチコピー */
.vb-catch {
    margin-top: 14px;
    background: rgba(255, 255, 255, 0.08);
    padding: 16px;
    border-radius: 12px;
    border-left: 4px solid #ffc15e;
}

.vb-catch h2 {
    margin: 0 0 8px;
    font-size: 1.3rem;
}

.vb-catch p {
    margin: 0;
    line-height: 1.7;
}

/* セクション共通 */
.vb-section {
    margin-top: 28px;
    background: rgba(255, 255, 255, 0.06);
    padding: 18px;
    border-radius: 16px;
    border-left: 4px solid #ffc15e;
}

.vb-title {
    font-size: 1.25rem;
    margin: 0 0 12px;
}

.vb-section p {
    margin: 0;
    line-height: 1.8;
}

/* 技術カード */
.vb-skills {
    display: grid;
    gap: 14px;
}

@media (min-width: 650px) {
    .vb-skills {
        grid-template-columns: repeat(3, 1fr);
    }
}

.vb-skill-card {
    background: rgba(0, 0, 0, 0.2);
    padding: 14px;
    border-radius: 14px;
    border: 1px solid #ffc15e;
}

.vb-skill-card h3 {
    margin: 0 0 6px;
    font-size: 1rem;
}

.vb-skill-card p {
    margin: 0;
    font-size: 0.85rem;
}

/* フッター */
.vb-footer {
    text-align: center;
    padding: 30px 0 18px;
    color: #dbe7f3;
}

.back-home {
    display: inline-block;
    color: #ffdba8;
    text-decoration: none;
    margin-bottom: 8px;
}

.back-home:hover {
    text-decoration: underline;
}

/* ふわっと表示 */
.fade-in {
    opacity: 0;
    transform: translateY(10px);
    transition: 0.6s;
}

.fade-in.show {
    opacity: 1;
    transform: translateY(0);
}