/* Day & Night Mode */
body.day-mode {
    background-color: #fff;
    color: #000;
}

body.night-mode {
    background-color: #2f2f2f;
    color: #fff;
}

/* Day/Night Toggle Button */
#dayNightToggle {
    position: fixed;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Full-Screen Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease-in-out, visibility 0.5s ease-in-out;
}

/* Spinner */
.spinner {
    display: inline-block;
    width: 32px;
    height: 32px;
    --svg: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cg%3E%3Ccircle cx='3' cy='12' r='2' fill='%23000'/%3E%3Ccircle cx='21' cy='12' r='2' fill='%23000'/%3E%3Ccircle cx='12' cy='21' r='2' fill='%23000'/%3E%3Ccircle cx='12' cy='3' r='2' fill='%23000'/%3E%3Ccircle cx='5.64' cy='5.64' r='2' fill='%23000'/%3E%3Ccircle cx='18.36' cy='18.36' r='2' fill='%23000'/%3E%3Ccircle cx='5.64' cy='18.36' r='2' fill='%23000'/%3E%3Ccircle cx='18.36' cy='5.64' r='2' fill='%23000'/%3E%3CanimateTransform attributeName='transform' dur='1.5s' repeatCount='indefinite' type='rotate' values='0 12 12;360 12 12'/%3E%3C/g%3E%3C/svg%3E");
    background-color: currentColor;
    -webkit-mask-image: var(--svg);
    mask-image: var(--svg);
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-size: 100% 100%;
    mask-size: 100% 100%;
}

/* Hide Loading Screen */
.hidden {
    opacity: 0;
    visibility: hidden;
}