.header {
    background: linear-gradient(155deg, rgba(255, 255, 255, 0.14), rgba(20, 31, 48, 0.35) 18%, rgba(9, 16, 28, 0.62) 74%);
    border: 1px solid rgba(207, 220, 241, 0.27);
    color: #f2f5fb;
    height: 80px;
    display: flex;
    align-items: center;
    border-radius: 16px;
    box-shadow: 0 14px 30px rgba(2, 8, 18, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.22);
    padding: 0 30px;
    max-width: 85%;
    margin: 0 auto 34px;
    backdrop-filter: blur(18px) saturate(120%);
    -webkit-backdrop-filter: blur(18px) saturate(120%);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 0 12px;
    box-sizing: border-box;
}

.header-title h1 {
    font-size: 24px;
    margin: 0;
    letter-spacing: 0.015em;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-nav a {
    color: #f2f5fb;
    text-decoration: none;
    font-size: 16px;
    margin-left: 0;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(198, 214, 242, 0.16);
    transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.header-nav a:hover {
    transform: translateY(-2px);
    border-color: rgba(216, 228, 248, 0.46);
    background: rgba(255, 255, 255, 0.1);
}

.total {
    margin: 4px 0 0;
    color: rgba(227, 233, 245, 0.76);
}

@media (max-width: 1080px) {
    .header-container {
        max-width: 100%;
        padding: 0 6px;
    }

    .header {
        max-width: 94%;
        height: auto;
        padding: 12px 14px;
        margin-bottom: 18px;
        border-radius: 14px;
    }

    .header-title h1 {
        font-size: 18px;
    }

    .header-nav {
        gap: 8px;
    }

    .header-nav a {
        width: 34px;
        height: 34px;
    }

    .total {
        font-size: 14px;
    }
}

@media (max-width: 900px), (prefers-reduced-motion: reduce) {
    .header {
        background: rgba(11, 20, 44, 0.92) !important;
        -webkit-backdrop-filter: none !important;
        backdrop-filter: none !important;
        box-shadow: 0 4px 12px rgba(2, 8, 18, 0.26) !important;
    }

    .header-nav a {
        transition: none !important;
    }

    .header-nav a:hover {
        transform: none !important;
    }
}