nav {
    background-color: var(--whitetheme);
    color: var(--texttheme1);

    width: 100%;
    min-height: 8vh;
    height: auto;

    box-sizing: content-box;
    padding: 7px 0px;

    display: flex;
    justify-content: space-around;
    align-items: center;
    
    position: sticky;
    top: 0;

    font-size: 1rem;
    z-index: var(--navbar-axis);
}

nav > .nav-left {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 15%;
    height: 100%;
    padding: 5px 4%;
    gap: 5px;
}
nav > .nav-left a {
    display: block;
    height: 100%;
}
.nav-left #brandlogo {
    content: url("../assets/images/icon/lingua-high-resolution-logo-transparent-theme1.png");
    height: 100%;
    max-height: 60px;
    width: auto;
    transition: all 0.3s ease-in-out;
}
.nav-left #brandlogo:hover {
    transform: scale(1.1);
}
.nav-left a:active #brandlogo{
    content: url("../assets/images/icon/lingua-high-resolution-logo-transparent-theme2.png");
}
.nav-left h1 {
    color: var(--texttheme-main);
    font-size: 1.875rem;
    user-select: none;
}
.nav-left:has(a:hover) h1 {
    text-shadow: 0px 2px 2px var(--second-theme);
}
.nav-left:has(a:active) h1 {
    color: var(--texttheme-main);
    text-shadow: none;
    text-decoration: underline var(--dialog-bkgrnd);
}

nav > .nav-center {
    width: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}
.nav-center > form {
    width: 65%;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 5px 5px;
    background-color: var(--navbar-form-bkgrnd);
    border: 2px solid var(--blacktheme);
    border-radius: 25px;
    transition: background 0.5s ease-in;
}
.nav-center input[type=search] {
    background: transparent;
    outline: none;
    border: none;
    width: 100%;
    height: 100%;
    font-size: 1.2rem;
    color: var(--texttheme1);
    padding: 5px 15px;
}
.nav-center input[type=search]::placeholder {
    text-align: center;
    color: var(--texttheme1-trans);
    font-size: 1.3rem;
}
.nav-center input[type="search"]::-webkit-search-cancel-button {
    /* forcing the cross mark button to white color */
    transform: scale(1.2);
    cursor: pointer;
    filter: brightness(0) invert(0) ;
}
.nav-center form:has(input:focus) {
    background-color: var(--dialog-bkgrnd-light);
}
.nav-center button {
    all: unset;
    border-radius: 50%;
    padding: 5px 7px;
    transition: all 0.3s ease;
    cursor: pointer;
}
.nav-center button:hover {
    border-top-left-radius: 0px;
    border-bottom-left-radius: 0px;
    background-color: var(--maintheme);
}
.nav-center button img {
    height: 30px;
    width: 30px;
    filter: invert(1);
    transition: all 0.5s ease;
}
.nav-center button:hover img {
    transform: scale(1.08);
    filter: invert(0);
}
.nav-center button:active {
    background-color: var(--texttheme-main-active);
}

nav > .nav-right {
    width: 40%;
    height: 100%;
    font-size: 1.125rem;
}
.nav-right > ul {
    list-style: none;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 10px;
    height: 100%;
}
.nav-right > ul > li:first-child div {
    cursor: pointer;
    padding: 20px 0px;
}
.nav-right > ul li.nav-separator-line{
    width: 0px;
    border: 0.1px solid var(--texttheme-main-active);
    height: 30px;
    margin: 0 0.5rem;
}

.nav-right .login-nav-buttons {
    /* experiement*/
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.nav-right .login-nav-buttons label{
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    margin: 0.5rem;

}
.nav-right .login-nav-buttons label:first-child:hover {
    /* login label button */
    color: var(--maintheme);
}
.nav-right .login-nav-buttons label:last-child {
    /* signup label button */
    border: 3px solid var(--maintheme);
    border-radius: 25px;
    color: var(--whitetheme);
    background-color: var(--maintheme);
    font-weight: bold;
    /* padding: 0.175rem 0.65rem;*/

    /* experiemtn */
    padding: 0.2rem 0.6rem;       /* relative padding */
    min-width: 70px;              /* ensures minimum size */
    text-align: center;           
    white-space: nowrap;          /* prevents wrapping inside the button */
    box-sizing: border-box;       
    flex-shrink: 1;               /* allows shrinking slightly on small screens */

}
.nav-right .login-nav-buttons label:last-child:hover {
    background-color: var(--texttheme-main-active);
    border: 3px solid var(--texttheme-main-active);   
}
.nav-right .login-nav-buttons label:last-child:active {
    background-color: var(--whitetheme);
    color: var(--texttheme-main);
    border: 3px solid var(--maintheme);   
}


/* hamburger toggle css */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 25px;
    cursor: pointer;
    z-index: calc(var(--navbar-axis) + 1);

    position: fixed;
    top: 0;
    left: 0;
}
.hamburger span {
    display: block;
    height: 4px;
    width: 100%;
    background-color: var(--texttheme-main);
    border-radius: 2px;
    transition: all 0.3s ease;
}


/* navbar media queries - subject to change experimenting*/
/* Navbar media queries */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        height: auto;
        padding: 4px 0;
    }

    nav > .nav-left {
        width: 100%;
        justify-content: center;
        padding: 4px 0px;
        gap: 5px;
    }

    .nav-left h1 {
        font-size: 1.5rem;
    }

    nav > .nav-center {
        width: 90%;
        margin: 5px 0;
    }

    .nav-center form {
        width: 100%;
    }

    nav > .nav-right {
        width: 100%;
        /* margin-top: 5px; */ /* removed for experimental hamburger css */ 
    }

    .nav-right > ul {
        flex-direction: column;
        gap: 5px;
    }

    .nav-right .login-nav-buttons label {
        padding: 0.25rem 0.5rem;
        font-size: 0.9rem;
    }

    .nav-right > ul li.nav-separator-line {
        display: none;
    }

    /* experimental css below */
    /* show hamburger */
    .hamburger {
        display: flex;
        margin: 15px;
    }

    /* hide .nav-right by default */
    nav > .nav-right {
        display: none;
        flex-direction: column;
        width: 100%;
        height: auto;
        gap: 5px;
        background-color: var(--whitetheme);
        position: absolute;
        top: 100%; /* right below navbar */
        left: 0;
        box-shadow: 0px 4px 2px var(--maintheme-alpha);
        transition: opacity 0.5s ease-in-out;
    }

    /* show .nav-right when hamburger checked */
    #hamburger-toggle:checked ~ nav .nav-right {
        display: flex;
    }

    #hamburger-toggle:checked + .hamburger span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    #hamburger-toggle:checked + .hamburger span:nth-child(2) {
        opacity: 0;
    }

    #hamburger-toggle:checked + .hamburger span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
}

@media (max-width: 480px) {
    nav > .nav-center {
        width: 95%;
    }

    nav > .nav-left h1 {
        font-size: 1.25rem;
    }
}

/* New styles for small landscape devices */
@media (max-width: 640px) and (orientation: landscape) {
    nav {
        display: none; /* hide navbar completely */
    }

    .hamburger {
        display: flex; /* show the hamburger icon */
    }
    
    #hamburger-toggle:checked ~ nav {
        display: flex;
    }
}