:root[data-theme="light"]{
    --border-color: #e2e8f0;
    --gradient: linear-gradient(to right, #6366f1, #3b82f6, #06b6d4);
    --gradient-hover: linear-gradient(to right, #4f46e5, #2563eb);
    --nav-bg: rgba(255, 255, 255, 0.8);
    --nav-border: #e2e8f0;
    --nav-text: #0f172a;
    --nav-hover-bg: #f1f5f9;
    --nav-accent: #6366f1;
    --invert: invert(1) opacity(0.5);
    --profile-pic: url(../Assets/Cube/BA5.jpg);
}

:root[data-theme="dark"]{
    --border-color: #334155;
    --gradient: linear-gradient(to right, #818cf8, #38bdf8, #22c55e);
    --gradient-hover: linear-gradient(to right, #6366f1, #0ea5e9);
    --nav-bg: rgba(15, 23, 42, 0.8);
    --nav-border: #334155;
    --nav-text: #e2e8f0;
    --nav-hover-bg: #1e293b;
    --nav-accent: #818cf8;
    --invert: invert(0) opacity(1);
    --profile-pic: url(../Assets/Cube/BA.png);
}

nav.navbar {
    width: 90vw;
    max-width: 1200px;
    min-height: 50px;
    padding: 12px 16px;
    border: 2px solid var(--nav-border);
    border-radius: 1rem;
    display: flex;
    justify-content: space-between;
    place-items: center;
    flex-wrap: wrap;
    row-gap: 25px;
    background: var(--nav-bg);
    position: fixed;
    top: 25px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 4;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    transition: all 0.4s ease-in-out;
    backdrop-filter: blur(10px);
}

nav:hover {
    background: var(--nav-hover-bg);
}

.nav-logo-section {
    display: flex;
    align-items: center;
    column-gap: 8px;
    flex-shrink: 0;
}

.nav-logo-section h1 {
    font-size: x-large;
    background: var(--gradient);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    cursor: default;
    transition: all 0.3s;
}

.nav-logo-section h1:hover {
    background: var(--gradient-hover);
    background-clip: text;
}

.siteLogo {
    width: 40px;
    aspect-ratio: 1;
    background: var(--profile-pic) center center no-repeat;
    background-size: cover;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    transition: all 0.3s;
}

.siteLogo:hover {
    transform: scale(1.05);
}

.nav-menu {
    padding: 0 8px;
    display: flex;
    flex-direction: row;
    justify-content: space-evenly;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 0px;
    display: none;
}

.navItem {
    color: var(--nav-text);
    padding: 4px 8px;
    min-width: 11ch;
    height: 40px;
    border: 2px solid var(--nav-border);
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: content-box;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    backdrop-filter: blur(10px);
}

.navItem a {
    all: unset;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.navItem:hover {
    background-color: var(--nav-hover-bg);
    border-color: var(--nav-accent);
}

.navItem--active {
    border-color: var(--nav-accent);
    background-color: var(--nav-hover-bg);
    box-shadow: 0 0 8px var(--nav-accent);
}

.navItem--active span {
    background: var(--gradient);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.navItem span {
    background: var(--gradient);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    border-radius: 0.75rem;
    transition: all 0.3s;
}

.navItem span:hover {
    background: var(--gradient-hover);
    background-clip: text;
}

.themeProvider {
    width: 40px;
    cursor: pointer;
    border: 2px solid var(--nav-border);
    border-radius: 0.25rem;
    padding: 5px;
    transition: all 0.3s;
}

.themeProvider:hover {
    transform: scale(1.05);
}

#handheld-menu {
    position: fixed;
    top: 75px;
    left: 0;
    right: 0;
    margin-top: 8px;
    padding: 12px;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    display: flex;
    gap: 8px;
    background: var(--nav-bg);
    border: 2px solid var(--nav-border);
    border-radius: 0.75rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transition: max-height 0.4s ease-in-out, opacity 0.2s ease;
    box-sizing: border-box;
    backdrop-filter: blur(10px);
}

.navbar.menu-open #handheld-menu {
    max-height: 320px;
    opacity: 1;
}

.hamburger {
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hamburger img{
    filter: var(--invert);
}

.hamburger:hover {
    opacity: 0.7;
}

#desktop-menu {
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

@media only screen and (min-width: 375px) {
    .nav-menu {
        flex-direction: row;
    }
}

@media only screen and (min-width: 426px){
    #handheld-menu{
        top: 80px;
        justify-content: space-evenly;
    }
    .navItem{
        font-size: 1rem;
        font-weight: 600;
    }
}

@media only screen and (min-width: 647px) {
    nav.navbar {
        width: 85vw;
        max-width: 1200px;
    }
}

@media only screen and (min-width: 768px) {
    nav.navbar {
        width: 90vw;
        max-width: 1200px;
        padding: 12px 16px;
        justify-content: space-between;
    }
    .siteLogo {
        width: 50px;
    }
    .hamburger {
        width: 40px;
    }
    .navItem {
        border: 2px solid var(--nav-border);
        font-size: 1.1rem;
        font-weight: 800;
    }
    .navItem:hover {
        background-color: var(--nav-hover-bg);
    }
}

@media only screen and (min-width: 1169px) {
    nav.navbar {
        justify-content: space-between;
        border-radius: 1rem;
        gap: 25px 0px;
    }
    .nav-logo-section {
        column-gap: 15px;
        flex-shrink: 0;
    }
    .hamburger {
        display: none !important;
    }
    #desktop-menu {
        display: flex !important;
    }
    #handheld-menu {
        display: none !important;
    }
}

@media only screen and (min-width: 1252px) {
    nav.navbar {
        padding: 15px 25px;
        justify-content: space-between;
    }
    .nav-logo-section {
        width: auto;
    }
    .nav-menu {
        gap: 15px;
    }
    h1 {
        font-size: xx-large;
    }
}