html, body {
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: #38bdf8 #0a192f;
}

#loading-screen {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: transparent; 
    transition: opacity 0.5s ease-out, visibility 0.5s;
}

.loader-hidden {
    opacity: 0;
    visibility: hidden;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(56, 189, 248, 0.3);
    border-top-color: #38bdf8;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

body.loading > header,
body.loading > main,
body.loading > footer {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease-in;
}

body.loaded > header,
body.loaded > main,
body.loaded > footer {
    opacity: 1;
    visibility: visible;
}

.toggle-checkbox:checked {
    right: 0;
    border-color: #38bdf8;
}

.toggle-checkbox:checked + .toggle-label {
    background-color: #38bdf8;
}

::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: #0a192f;
}

::-webkit-scrollbar-thumb {
    background-color: #38bdf8;
    border-radius: 6px;
    border: 3px solid #0a192f;
}

::-webkit-scrollbar-thumb:hover {
    background-color: #60a5fa;
}