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

html, body {
    height: calc(var(--vh, 1vh) * 100);
    overflow: hidden;
    font-family: "Segoe UI", sans-serif;
    line-height: 1.6;
    color: #333;
}

#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;
}

.scroll-container {
    position: absolute;
    top: var(--header-height);
    bottom: 0;
    left: 0;
    right: 0;
    overflow-y: auto;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

.scroll-container main {
    background: #f9f9f6;
}