.tab-menu {
    display: flex;
    background: #0b3c5d;
    padding: 0 10px;
}

.menu-item {
    position: relative;
}

.menu-item > a {
    display: block;
    padding: 10px 15px;
    color: #fff;
    font-weight: 500;
}

.menu-item > a:hover {
    background: #095a88;
}

/* Submenu */
.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #ffffff;
    min-width: 200px;
    border: 1px solid #ccc;
    z-index: 1000;
}

.submenu a {
    display: block;
    padding: 8px 12px;
    color: #333;
}

.submenu a:hover {
    background: #f2f2f2;
}

.menu-item:hover .submenu {
    display: block;
}

.topbar {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    background: #d7dde6;
    color: #070707;
}

/* ดันไปขวาสุด */
.topbar-right {
    margin-left: auto;
    display: flex;
    align-items: center;
}

/* login form */
.login-form {
    display: flex;
    gap: 6px;
    align-items: center;
}

.login-form input {
    padding: 4px 6px;
    border-radius: 3px;
    border: 1px solid #ccc;
}

.login-btn {
    background: #1e90ff;
    color: #fff;
    border: none;
    padding: 5px 10px;
    border-radius: 3px;
    cursor: pointer;
}

.login-btn:hover {
    background: #187bcd;
}

/* logout */
.logout-btn {
    background: #e11d48;
    color: #fff;
    padding: 6px 12px;
    border-radius: 4px;
    text-decoration: none;
}

.logout-btn:hover {
    background: #be123c;
}