*{box-sizing:border-box}
    html,body{height:100%}

body{
      margin:0;
      font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial, "Apple Color Emoji","Segoe UI Emoji";
      background:linear-gradient(180deg,var(--bg), #0b1228 40%, var(--bg) 100%);
      line-height:1.6;
    }
    
.wrap{max-width:1000px;margin-inline:auto;padding:48px 20px}

ul {
    list-style: none;
}

header {
    background-color: white;
    box-shadow: 0 2px 10px var(--shadow-color);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-container {
    text-align: center;
    margin-bottom: 16px;
}

.logo {
    height: 60px;
    display: inline-block;
}

.main-nav ul {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.main-nav a {
    font-size: 20px;
    color: black;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

.main-nav a:hover, .main-nav a.active {
    color: var(--primary-color);
}

.main-nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.main-nav a:hover::after, .main-nav a.active::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    cursor: pointer;
    font-size: 24px;
    color: var(--secondary-color);
}