* {
    box-sizing: border-box;margin: 0;padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
body { background-color: #f9f9f9;}
a { text-decoration: none;}
.main-header{ background-color: #fff;border-bottom: 1px solid #eee;height: 80px;display: flex;align-items: center;}
.header-container {
    width: 95%;
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}
.logo{ font-size: 24px;font-weight: 900;color: #000;letter-spacing: -1px; }
.logo span {   color: #38E2F5;}
.main-nav{ flex: 1; display: flex;justify-content: center;}
.nav-list{ display: flex;list-style: none;gap: 30px;}
.nav-list a {
    color: #555;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s;
}
.nav-list a:hover {color: #38E2F5;}
.btn-account {
    background: linear-gradient(90deg, #38E2F5 0%, #0AB4C7 100%);
    color: white;
    padding: 12px 25px;
    border-radius: 12px;
    font-weight: bold;
    font-size: 14px;
    box-shadow: 0 4px 15px rgba(12, 212, 235);
}
.menu-toggle, .menu-toggle-label { display: none; }
@media (max-width: 850px) {
    .header-container {
        justify-content: space-between;
    }
    .logo {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        font-size: 20px;
        z-index: 5;
    }
    .menu-toggle-label {
        display: flex;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
        z-index: 10;
        width: 30px;
    }

    .bar {
        width: 100%;
        height: 3px;
        background-color: #333;
        border-radius: 2px;
        transition: 0.3s;
    }
    .main-nav {
        position: absolute;
        top: 60px;
        left: -100%;
        width: 100%;
        background-color: #fff;
        flex-direction: column;
        transition: 0.4s ease-in-out;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        z-index: 4;
    }

    .nav-list {
        flex-direction: column;
        padding: 20px;
        gap: 0;
    }

    .nav-list li {
        border-bottom: 1px solid #f0f0f0;
    }

    .nav-list a {
        display: block;
        padding: 15px;
    }
    .menu-toggle:checked ~ .main-nav {
        left: 0;
    }
    .menu-toggle:checked ~ .menu-toggle-label .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .menu-toggle:checked ~ .menu-toggle-label .bar:nth-child(2) {
        opacity: 0;
    }
    .menu-toggle:checked ~ .menu-toggle-label .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    .header-actions {
        z-index: 10;
    }
    
    .btn-account {
        padding: 8px 15px;
        font-size: 12px;
    }
}