body { background-color: #1a1a1a; color: #e0e0e0; font-family: sans-serif; position: relative; }

/* 背景画像を明るさ調節するため、疑似要素で配置 */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image: linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.3)), url(カオスリロード背景.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: brightness(0.8); /* 明るさを調節（1が元、0～1で暗く、>1で明るく） */
    z-index: -1;
}

header { border-bottom: 2px solid #ff4500; padding: 20px; }
.technique-card { background: #2d2d2d; margin: 20px; padding: 15px; border-left: 5px solid #ff4500; }
.point { color: #ff4500; font-weight: bold; }