:root {
    --b1: hsl(0, 0%, 3%);
    --b2: hsl(0, 0%, 10%);
    --b3: hsla(0, 0%, 5%, 0.85);
    --c1: white;
    --c2: black;
    --n1: 20px;
    --n2: 10px;
    --nav: 75px;
    /*b# means "background color #" ex. b1 = background color 1, c# = color#*/
}

html,
body {
    font-size: 17px;
    letter-spacing: 0.5px;
    scrollbar-color: var(--c1) transparent;
    color: var(--c1);
    scrollbar-width: none;
    overscroll-behavior: none;

}

body {
    background-color: var(--b1);
    width: 100%;
    height: calc(100vh - var(--nav));
    margin-top: var(--nav);
    padding: var(--n1);
    display: flex;
    flex-direction: column;
    font-family: "Montserrat", Arial, Helvetica, sans-serif;
    font-weight: 450;

}

body.loading {
    overflow: hidden;
    /*When loading screen is shown, overflow hidden*/
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}


h1,
h2,
h3,
h4,
h5,
h6 {
    font-size: unset;
    font-weight: unset;
}

button {
    font-family: inherit;
    border: none;
    color: inherit;
    transition: 0.3s;
    position: relative;
    cursor: pointer;
    background-color: var(--b2);
    font-weight: bold;
    font-size: 1.2em;
    border-radius: var(--n1);
    padding: calc(var(--n1) * 0.75);
    padding-inline: var(--n2);

}

input {
    padding: 10px;
    background: var(--b1);
    border-radius: var(--n2);
    color: var(--c1);
    border: none;
    font-size: 1em;
    font-family: inherit;
}
input:focus-visible {
    outline-color:var(--c1);
}
button:hover {
    filter: brightness(1.3);
}

button:hover:after {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
}

/*First-time setup*/
#setup {
    width: 100%;
    height: 100%;
    border-radius: 0px;
    top: 0;
    left: 0;
    backdrop-filter: blur(15px);
}

.setup-sect {
    background: var(--b2);
    padding: calc(var(--n1) * 3);
    height: 100%;
    border-radius: var(--n1);
    display: none;
    justify-content: center;
    flex-direction: column;
    gap: 10px;
    font-size: 1.5em;
    scale: 0.95;
    opacity: 0;
    transition: 0.3s allow-discrete;
    pointer-events:auto;
}

.setup-sect.active {
    display: flex;
    scale: 1;
    opacity: 1;
    transition: 0.3s allow-discrete;
}

@starting-style {
    .setup-sect.active {
        scale: 0.95;
        opacity: 0;
    }
}

.setup-buttons {
    position: absolute;
    bottom:0;
    right:0;
    width:100%;
    max-width:800px;
    padding:40px;
    padding-top:0;
    z-index: 15;
    display: flex;
    gap: 10px;
}

.setup-buttons button {
       z-index: 15;
    font-size: 1.5em;
    background: var(--b1);
    padding: 15px;
    color: var(--c1);
        pointer-events:auto;
        width:100%;
    
}

#next-button {
    background: var(--c1);
    color: var(--c2);
}

/*Loading screen*/
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10;
    background: var(--b1);
    width: 100%;
    height: 100%;
    display: flex;
    gap: calc(var(--n1) * 3);
    padding: calc(var(--n1) * 3);
    align-items: center;
    justify-content: center;
    transition: 0.3s allow-discrete;

}

#loading-screen.hidden {
    opacity: 0;
    display: none;
}

#user-load-info {
    width: 100%;
    padding: var(--n1);
    background: var(--b1);
    border-radius: var(--n1);
    flex-direction: column;
    gap: 5px;
    text-align: center;
    font-size: 2.5em;
}

#load-title {
    font-size: 1em;
    font-weight: bold;
}

#load-desc {
    font-size: 0.5em;
}

#user-load-info,
.script-cont {
    width: 100%;
    background: var(--b1);
    padding: var(--n2);
    border-radius: var(--n1);
    display: flex;
}

.script-cont {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.script {
    background: var(--b2);
    padding: var(--n2);
    border-radius: var(--n2);
}

.status {
    animation: rotate 1s infinite linear;
    border-radius: 50%;
    aspect-ratio: 1/1;
    width: 40px;
    overflow: hidden;
    border: 3px solid;
    border-image-repeat: stretch;
    border-right-color: transparent;
    position: relative;
}

.status.complete {
    border: none;
    background: rgb(9, 156, 9);
    animation: none;
}

#load-img {
    height: 400px;
}

/*Universal styling for popups*/
.popup {
    display: none;
    flex-direction: column;
    gap: var(--n1);
    overflow-y: auto;
    padding: var(--n1);
    position: fixed;
    transition: 0.3s allow-discrete;
    opacity: 0;
    left: unset;
    top: 0;
    scale: 0.97;
    top: var(--n1);
    right: var(--n1);
    z-index: 5;
    background: var(--b3);
    width: calc(100vw - var(--n1) * 2);
    height: calc(100vh - var(--n1) * 2);
    backdrop-filter: blur(10px) saturate(3);
    box-shadow: 0px 0px 10px 5px var(--b2);
    filter: blur(var(--n2));
    overflow-y: auto;
    border-radius: var(--n1);
    user-select: none;
    overflow-x:hidden;
}

.popup-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--n1);
}

.popup-title {
    font-size: 3em;
    font-weight: bold;
    text-align: left;
}

.popup.active {
    display: flex;
    opacity: 1;
    scale: 1;
    filter: none;
}

@starting-style {

    .popup,
    .popup.active {
        opacity: 0;
        scale: 0.97;
        display: flex;
        filter: blur(var(--n2));
    }

}

.popup-item {
    display: flex;
    justify-content: safe center;
    align-items: safe center;
    background: var(--b2);
    padding: var(--n1);
    border-radius: 20px;
    font-size: 1.2em;
    flex-direction: column;
    gap: var(--n2);
    width: 100%;
    text-align: center;
    height: auto;
}

#loading-screen .popup-item {
    max-width: 700px;
    width: 100%;
}

/*Navigation*/
#nav {
    position: fixed;
    top: 0;
    left: 0;
    background-color: var(--b3);
    backdrop-filter: blur(50px);
    box-shadow: 0px 0px 8px 5px var(--b2);
    height: var(--nav);
    width: 100%;
    padding: var(--n2);
    padding-inline: var(--n1);
    display: flex;
    justify-content: space-between;
    user-select: none;
    align-items: center;
    z-index: 3;
}

#logo {
    height: 100%;
}

#logo-cont {
    height: 100%;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    display: flex;
    gap: var(--n2);
    font-size: 20px;

}

#icon-tray {
    display: flex;
    gap: var(--n2);
    height: 100%;
    align-items: center;
    justify-content: center;
}

.nav-btn,
.close-btn {
    background-color: var(--b2);
    height: 100%;
    aspect-ratio: 1/1;
    border-radius: var(--n2);
    font-family: 'Material Symbols Outlined';
    font-size: 1.75rem;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight:normal;

}

.close-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 65px;
    height: 65px;
    font-size: 40px;
}

/*Themes*/
#themes-popup {
    width: calc(100% - 40px);
    max-width: 400px;
    height: 40vh;
    border-radius: var(--n1);
    margin-inline: 20px;
    top: calc(var(--nav) + var(--n1));
    right: 0;
    left: unset;
    background: var(--b1);
    transform: none;
    gap: var(--n2);
    z-index: 3;
}

.title-small {
    font-size: 1.2em;
}

.popup-title-small {
    font-size: 1.5em;
    font-weight: bold;
}

.title-medium {
    font-size: 2em;
    font-weight: bold;
}

.theme-btn {
    font-size: 1.2em;
    font-weight: bold;
    padding: calc(var(--n1) * 0.6);
}

/*Settings (embedded in <nav>)*/
#settings {
    max-width: 800px;
}

.settings-cont button {
    width: 100%;
    background: var(--b1);
}

.settings-cont {
    background: var(--b2);
    display: flex;
    flex-direction: column;
    gap: var(--n2);
    padding: var(--n1);
    border-radius: 20px;
    height: fit-content;
}

.setting {
    display: flex;
    justify-content: space-between;
    gap: var(--n2);
    width: 100%;
    font-size: 1.2em;
    background: var(--b1);
    padding: 15px;
    border-radius: var(--n1);
    align-items: center;
}

.setting-toggle {
    transition: 0.3s;
    border-radius: var(--n2);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.setting-toggle:hover,
.setting-toggle:focus-visible {
    scale: 1.1;
}

.setting-toggle::before,
.setting-toggle::after {
    content: '';
    transition: 0.2s;
}

.setting-toggle[type=checkbox] {
    appearance: none;
    background: var(--b2);
    width: 80px;
    height: 30px;

}

.setting-toggle[type=checkbox]::after {
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    font-family: 'Material Symbols Outlined';
    display: flex;
    align-items: center;
    justify-content: center;
}

.setting-toggle::after {
    width: 50%;
    background: var(--c1);
    content: '';
}

.setting-toggle[type=checkbox]:checked:after {
    transform: translateX(100%);
    content: 'check';
    background: rgb(49, 205, 49);
    font-size: 25px;
    font-weight: bold;
}

/*Layout of the homework*/
#grid-cont {
    min-height: 100%;
    padding: var(--n1);
    background-color: var(--b2);
    border-radius: var(--n1);
    display: flex;
    gap: 20px;
    flex-direction: column;
}

.grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    min-height: calc(100vh - var(--n1) * 8);
    transition: 0.3s allow-discrete;
    opacity: 1;
    filter: none;
    scale: 1;
}

.grid.inactive {
    display: none;
    opacity: 0;
    filter: blur(16px);
    scale: 0.97;
}

@starting-style {

    .grid.active,
    .grid {
        opacity: 0;
        filter: blur(16px);
        scale: 0.97;
    }
}

/*Subjects*/
.subject {
    background-color: var(--b1);
    height: 100%;
    width: 100%;
    flex-direction: column;
    overflow-x: hidden;
    border-radius: var(--n1);
    padding: var(--n1);
    position: relative;
    color: white;
    box-shadow: 0px 0px 30px var(--n2) var(--b3);
    z-index: 1;

}

.subject::before,
.subject::after {
    transition: 0.3s allow-discrete;
    display: none;
    width: 100%;
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;

}

.subject::after {
    height: 100%;
    background: var(--b3);
    content: '';

    top: 0;
    left: 0;
    z-index: 1;
    backdrop-filter: blur(var(--n2));
    pointer-events: auto;
}

.subject::before {
    width: 0%;
    height: 5px;
    background: white;
    top: 50%;
    left: 0;
    transform: translate(0, -50%);
    z-index: 2;
}

.subject:has(.subject-marker:checked) {
    overflow: hidden;
}

.subject:has(.subject-marker:checked):after,
.subject:has(.subject-marker:checked):before {
    opacity: 1;
    display: flex;
    width: 100%;
}

@starting-style {

    .subject::before,
    .subject::after {
        opacity: 0;
        width: 0;

    }

    .subject:has(.subject-marker:checked):after,
    .subject:has(.subject-marker:checked):before {

        opacity: 0;
    }

    .subject:has(.subject-marker:checked):before {
        width: 0;
    }

}

.subject-title {
    font-size: 2.5rem;
    font-weight: bold;
    height: fit-content;
    margin-bottom: 5px;
    width: calc(100% - 60px);
    word-wrap: break-word;
}

.subject-desc {
    font-size: 2.5rem;
    word-wrap: break-word;
    max-width: 100%;
    transition: 0.3s;

}

.subject-desc:hover,
.subject-desc:focus-visible {
    background: rgba(0, 0, 0, 0.5);
    outline: none;
    padding: var(--n2);
    border-radius: var(--n2);
}

.subject-desc:focus {
    background: rgba(0, 0, 0, 0.9);

}

.subject-marker {
    position: absolute;
    top: 20px;
    right: 20px;
    border-radius: var(--n2);
    width: 50px;
    height: 50px;
    appearance: none;
    transition: 0.3s;
    cursor: pointer;
    background-color: var(--b1);
    color: var(--c1);
    display: none;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    z-index: 3;
    user-select: none;

}

.subject-marker::after {
    content: 'check';
    font-family: 'Material Symbols outlined';
    color: inherit;
    font-size: 3em;
}

/*Media*/
@media only screen and (max-width:1000px) {
    .grid {
        grid-template-columns: repeat(1, 1fr);
    }

    body {
        min-height: calc(100vh - var(--nav));
        height: auto;
        font-size:14px;
    }

    #loading-screen {
        flex-direction: column;
        padding: var(--n1);
        gap: var(--n1);
    }
    .setup-sect {
        padding:var(--n2);
    }
    #load-img {
        height: 250px;
    }

    #logo-text {
        display: none;
    }
}

/*Animation keyframes*/
@keyframes rotate {
    from {
        rotate: 0deg;
    }

    to {
        rotate: 360deg;
    }
}