.site-navbar {
    position: fixed;
    z-index: 20;
    top: 0;
    left: 0;
    right: 0;
    height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 36px;
    background: linear-gradient(90deg, rgba(47, 69, 126, 0.96), rgba(92, 83, 156, 0.94));
    box-shadow: 0 8px 26px rgba(41, 44, 92, 0.22);
    backdrop-filter: blur(12px);
}

.site-brand {
    color: #ffffff;
    font-size: 28px;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-decoration: none;
}

.site-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.site-actions a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 112px;
    min-height: 38px;
    padding: 9px 18px;
    border-radius: 999px;
    background: rgba(21, 112, 148, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.42);
    color: #ffffff;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 5px 14px rgba(34, 39, 91, 0.26);
    transition: 0.2s ease;
}

.site-actions a:hover {
    transform: translateY(-1px);
    background: rgba(28, 138, 178, 0.98);
}

.page-shell {
    position: relative;
    z-index: 1;
    display: flex;
    min-height: 100vh;
    padding-top: 68px;
}

.sidebar {
    width: 230px;
    min-height: calc(100vh - 68px);
    padding: 28px 20px;
    background: rgba(12, 90, 116, 0.88);
    box-shadow: 8px 0 30px rgba(25, 56, 75, 0.18);
    backdrop-filter: blur(10px);
}

.sidebar-nav {
    display: grid;
    gap: 12px;
}

.sidebar-nav a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    min-height: 38px;
    padding: 9px 14px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 10px;
    background: #0f6884;
    color: #ffffff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 5px 14px rgba(7, 51, 65, 0.22);
    transition: 0.2s ease;
}

.sidebar-nav a:hover {
    transform: translateY(-1px);
    background: #1180a4;
}

.main-content {
    flex: 1;
    padding: 28px 36px;
}

.page-header {
    margin-bottom: 76px;
}

.page-title {
    margin: 0;
    color: #102d3b;
    font-size: 30px;
    font-weight: 900;
}

@media (max-width: 860px) {
    .site-navbar {
        height: auto;
        min-height: 68px;
        padding: 14px 18px;
        flex-wrap: wrap;
        gap: 12px;
    }

    .site-brand {
        font-size: 24px;
    }

    .site-actions {
        gap: 10px;
    }

    .site-actions a {
        min-width: auto;
        padding: 8px 14px;
    }

    .page-shell {
        flex-direction: column;
        padding-top: 88px;
    }

    .sidebar {
        width: 100%;
        min-height: auto;
        padding: 18px;
    }

    .sidebar-nav {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .main-content {
        padding: 22px 18px;
    }

    .page-header {
        margin-bottom: 36px;
        text-align: center;
    }

    .page-title {
        font-size: 28px;
    }
}