/*********************************************
*********** start navbar ********************
*******************************************/
:root {
    --d-red-color: #fa5f5c;
    --d-blue-color: #6d8dfe;
    --d-yellow-color: #f3c83c;
    --l-yellow-color: #fcd34d;
    --l-red-color: #ff7675;
    --l-blue-color: #71bdfc;
    --green-color: #82dedd;
    --main-bg: #e7f6fd;
    --second-bg: #fff;
    --font-dark: #1d212c;
    --font-light: #959595;
    --shadow: rgba(0, 0, 0, 0.16) 0px 3px 6px;
    --main-color: var(--l-blue-color);
}

nav {
    background: var(--second-bg);
    padding: 1.5rem 3rem;
    position: fixed;
    width: 100%;
    box-shadow: var(--shadow);
    transition: 0.3s all ease;
    z-index: 999;
}

.navProgress {
    position: absolute;
    bottom: 0;
    transition: 0.4s all ease;
    height: 4px;
    border-radius: 3rem;
    width: 100%;
    right: 0;
    background-color: #d1d5db;
}

.navProgress .navProgChild {
    height: 100%;
    background-color: var(--d-blue-color);
    position: absolute;
    bottom: 0;
    width: 0;
    border-radius: 3rem;
}

nav .customeContainer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.right,
.left {
    display: flex;
    align-items: center;
}

.navAtom img {
    width: 50px;
}

.logoBrand {
    font-size: 2.4rem;
    margin: 0 0.8rem 0 1.5rem;
    color: var(--font-dark);
    font-weight: bold;
}

/*** light and dark svg ***/
.sun,
.moon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    opacity: 0;
    transition: 0.3s all ease;
}

.sun {
    z-index: 2;
    opacity: 1;
}

.dark .sun {
    opacity: 0;
    z-index: 1;
}

.sun svg {
    color: #feca57;
    width: 35px;
    transition: 0.3s all ease;
    transform: rotate(90deg);
}

.dark .sun svg {
    transform: rotate(0deg);
}

.dark .moon {
    opacity: 1;
    z-index: 2;
}

.moon svg {
    width: 35px;
    transform: rotate(180deg);
    transition: 0.3s all ease;
}

.dark .moon svg {
    transition: 0.3s all ease;
    transform: rotate(45deg);
}

/** search **/
.search {
    position: relative;
    width: 18rem;
    margin-left: 3rem;
}

.search span {
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    color: #b4b4b4;
}

.search input {
    width: 100%;
    padding: 0.5rem 3rem 0.5rem 1.5rem;
    border-radius: 3rem;
    border: 1px solid #707070;
    transition: 0.3s all ease;
    background: var(--second-bg);
    color: var(--font-dark);
}

.search input:focus {
    box-shadow: var(--shadow);
}

/*** register ***/
.left .register {
    display: flex;
}

.signup {
    margin-left: 2.5rem;
}

.regItem,
.regItem:hover {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
}

.signup .regItem,
.login .regItem {
    padding: 0.8rem 1.5rem;
    font-weight: 600;
    transition: 0.3s all ease;

    position: relative;
}

.signup:hover .regItem,
.login:hover .regItem {
    transform: translateY(-0.5rem);
}

.signup .regIcon,
.login .regIcon {
    transition: 0.2s cubic-bezier(0.88, 0.58, 0.5, 2.72) all;
}

.signup:hover .regIcon,
.login:hover .regIcon {
    transform: translateY(-0.3rem) rotate(10deg);
}

.regIcon {
    margin-left: 1rem;
    width: 25px;
}

.line {
    position: absolute;

    background-color: transparent;
}

.signup .line {
    background-color: var(--l-red-color);
}

.login .line {
    background-color: var(--l-blue-color);
}

.lineParent {
    position: relative;
}

.lineParent .line:nth-of-type(1) {
    left: 0;
    bottom: 0;
    height: 100%;
    width: 2px;
    transform: scaleY(0);
    transform-origin: top;
    transition: 0.3s transform ease;
}

.lineParent:hover .line:nth-of-type(1) {
    transform: scaleY(1.0001);
    transform-origin: bottom;
}

.lineParent .line:nth-of-type(2) {
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    transform: scaleX(0);
    transform-origin: right;
    transition: 0.3s transform ease;
}

.lineParent:hover .line:nth-of-type(2) {
    transform: scaleX(1.0001);
    transform-origin: left;
}

.lineParent .line:nth-of-type(3) {
    left: 0;
    top: 0;
    width: 100%;
    height: 2px;
    transform: scaleX(0);
    transform-origin: right;
    transition: 0.3s transform ease;
    transition-delay: 0.3s;
}

.lineParent:hover .line:nth-of-type(3) {
    transform: scaleX(1.0001);
    transform-origin: left;
    transition: 0.3s transform ease;
}

.lineParent .line:nth-of-type(4) {
    right: 0;
    bottom: 0;
    height: 100%;
    width: 2px;
    transform: scaleY(0);
    transform-origin: top;
    transition: 0.3s transform ease;
}

.lineParent:hover .line:nth-of-type(4) {
    transform: scaleY(1.0001);
    transform-origin: bottom;
    transition: 0.3s transform ease;
}

.toggleBarBtn {
    display: none;
}

.mobDetails {
    display: none;
}

/***********************************/
/****** auth navbar **************/

.studentInfo button {
    font-size: 1.8rem;
    color: #ef8321;
    transition: 0.3s all ease;
    display: flex;
    padding: 0.8rem 1rem;
    align-items: center;
}

.studentInfo button:focus {
    box-shadow: none;
}

.studentInfo button:hover {
    color: #ef8321;
}

.studentInfo button .line {
    background: #ef8321;
}

.dropdown-menu {
    padding: 1rem 2rem;
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.2);
    background: var(--second-bg);
    border-radius: 1.2rem;
}

.navDropItem {
    font-size: 1.6rem;
    color: var(--font-dark);
    padding: 0.5rem 0.8rem;
    text-align: right;
}

.navDropItem:hover {
    background: none;
    color: var(--font-dark);
}

.navDrop li:first-of-type .navDropItem {
    color: var(--l-blue-color);
}

.navDrop li:first-of-type .navDropItem .line {
    background: var(--l-blue-color);
}

.navDrop li:nth-of-type(2) .navDropItem {
    color: var(--l-red-color);
}

.navDrop li:nth-of-type(2) .navDropItem .line {
    background-color: var(--l-red-color);
}

.navDrop li:nth-of-type(3) .navDropItem {
    color: var(--font-dark);
}

.navDrop li:nth-of-type(3) .navDropItem .line {
    background-color: var(--font-dark);
}

.navDrop li:nth-of-type(4) .navDropItem {
    color: var(--l-yellow-color);
}

.navDrop li:nth-of-type(4) .navDropItem .line {
    background-color: var(--l-yellow-color);
}

.studentIcon {
    margin-left: 0.5rem;
}

/**** responsive *****/
@media (max-width: 991.5px) {
    html {
        font-size: 60%;
    }

    /** start nav **/
    .left {
        position: fixed;
        background-color: var(--second-bg);
        flex-direction: column;
        padding: 2rem 2rem;
        border-radius: 2rem;
        top: -60rem;
        opacity: 0;
        left: 50%;
        z-index: -1;
        transform: translateX(-50%);
        transition: 0.9s all ease;
        box-shadow: var(--shadow);
    }

    .activeNavMenu .left {
        z-index: 9999999999;
        opacity: 1;
        top: 50%;
        transform: translate(-50%, -80%);
    }

    .left .search {
        width: 100%;
        margin-left: 0;
    }

    .register {
        flex-direction: column;
        text-align: center;
    }

    .signup {
        margin: 3rem 0 2rem;
    }

    .toggleBarBtn {
        display: block;
        position: relative;
        width: 30px;
        background: none;
        border: none;
        height: 30px;
    }

    .toggleBarBtn span {
        width: 30px;
        height: 4px;
        background-color: var(--font-dark);
        border-radius: 10rem;
        margin: 0.25rem 0;
        left: 0;
        transition: 0.3s all ease;
        position: absolute;
    }

    .toggleBarBtn .topLine {
        top: 0;
    }

    .toggleBarBtn .middleLine {
        top: 8px;
    }

    .toggleBarBtn .bottomLine {
        top: 16px;
    }

    .activeNavMenu .topLine {
        width: 30px;
        transform: rotate(-45deg);

        transform-origin: right;
    }

    .activeNavMenu .middleLine {
        opacity: 0;
    }

    .activeNavMenu .bottomLine {
        width: 30px;
        transform: rotate(45deg);
        transform-origin: right;
        top: 21.5px;
    }

    /****** auth nav *********/
    .mobDetails {
        display: block;
    }

    .mainSearch {
        display: none;
    }

    .studentBtn {
        display: none;
    }

    .mobDetails .navDrop {
        margin-top: 2rem;
    }

    .studentImage {
        width: 8rem;
        position: absolute;
        top: 0;
        left: 50%;
        transform: translate(-50%, -55%);
    }

    .studentImage img {
        box-shadow: 0 3px 6px rgba(0, 0, 0, 0.2);
        border-radius: 50%;
        padding: 0.5rem;
        background: var(--second-bg);
        transition: 0.3s all ease;
    }

    .studentNameMob {
        font-size: 2rem;
        margin-top: 4rem;
        text-align: center;
    }

    .mobSearch {
        margin-top: 2rem;
    }
}

@media (max-width: 767px) {
    .activeNavMenu .left {
        width: 40%;
    }

    .studentNameMob {
        font-size: 1.8rem;
    }

    .levelsBox {
        width: 70%;
        margin: 0 auto;
    }
}

@media (max-width: 600px) {
    .activeNavMenu .left {
        width: 50%;
    }
}

@media (max-width: 500px) {
    .activeNavMenu .left {
        width: 65%;
    }

    html {
        font-size: 58%;
    }

    .levelsBox {
        width: 95%;
        margin: 0 auto;
    }
}

@media (max-width: 400px) {
    .activeNavMenu .left {
        width: 70%;
    }
}

:root {
    --atom-size: 180px;
    --atom-color-hex: #00d8ff;
    --atom-color-rgb: 0, 216, 255;
    --nucleus-size: calc(var(--atom-size) / 5);
    --electron-color-hex: #99f8ff;
    --electron-size: calc(var(--atom-size) / 25);
    --electron-orbit-size: calc(var(--atom-size) / 2.5);
    --electron-speed: 1.2s;
    --electron-speed-alpha: 1s;
    --electron-speed-omega: 0.8s;
}

.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #2d3946;
    z-index: 9999999999999;
    transition: 0.3s all ease;
}

.preloader .atom {
    position: absolute;
    top: 50%;
    left: 50%;

    width: var(--atom-size);
    height: var(--atom-size);
    animation: 8s atom infinite cubic-bezier(1, 0.25, 0, 0.75);
}

@keyframes atom {
    0% {
        transform: translate(-50%, -50%) rotate(0deg) scale(1);
    }
    12.5% {
        transform: translate(-50%, -50%) rotate(-45deg) scale(0.9);
    }
    25% {
        transform: translate(-50%, -50%) rotate(-90deg) scale(1);
    }
    37.5% {
        transform: translate(-50%, -50%) rotate(-135deg) scale(0.9);
    }
    50% {
        transform: translate(-50%, -50%) rotate(-180deg) scale(1);
    }
    62.5% {
        transform: translate(-50%, -50%) rotate(-225deg) scale(0.9);
    }
    75% {
        transform: translate(-50%, -50%) rotate(-270deg) scale(1);
    }
    87.5% {
        transform: translate(-50%, -50%) rotate(-315deg) scale(0.9);
    }
    100% {
        transform: translate(-50%, -50%) rotate(-360deg) scale(1);
    }
}

/* Nucleus */
.preloader .atom::before {
    content: "";
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    width: var(--nucleus-size);
    height: var(--nucleus-size);
    margin-top: calc(var(--nucleus-size) / -2);
    margin-left: calc(var(--nucleus-size) / -2);
    background: var(--electron-color-hex); /* var(--atom-color-hex); */
    border-radius: 100%;
    box-shadow: 0 0 3px 0 var(--atom-color-hex);
    animation: 2s nucleus infinite cubic-bezier(0.65, 0, 0.35, 1);
}

@keyframes nucleus {
    0% {
        transform: scale(1);
    }
    25% {
        transform: scale(0.9);
    }
    50% {
        transform: scale(1);
    }
    75% {
        transform: scale(0.85);
    }
    100% {
        transform: scale(1);
    }
}

/* Electron Orbit */
.preloader .atom > [class^="electron"] {
    border-top: solid rgba(var(--atom-color-rgb), 0.5) 1px;
    border-right: solid rgba(var(--atom-color-rgb), 0.35) 2px;
    border-bottom: solid rgba(var(--atom-color-rgb), 0.2) 4px;
    border-left: solid rgba(var(--atom-color-rgb), 0) 2px;
    border-radius: 100%;
    width: 100%;
    height: var(--electron-orbit-size);
    position: absolute;
    top: 50%;
    margin-top: calc(var(--electron-orbit-size) / -2);
    animation: var(--electron-speed) electron-orbit infinite linear;
}

.preloader .atom > .electron-alpha {
    transform: rotate(60deg);
    animation: var(--electron-speed-alpha) electron-orbit infinite linear;
}

.preloader .atom > .electron-omega {
    transform: rotate(-60deg);
    animation: var(--electron-speed-omega) electron-orbit infinite linear;
}

@keyframes electron-orbit {
    0% {
        border-top: solid rgba(var(--atom-color-rgb), 0.5) 1px;
        border-right: solid rgba(var(--atom-color-rgb), 0.35) 2px;
        border-bottom: solid rgba(var(--atom-color-rgb), 0.2) 4px;
        border-left: solid rgba(var(--atom-color-rgb), 0) 2px;
    }
    25% {
        border-top: solid rgba(var(--atom-color-rgb), 0.35) 1px;
        border-right: solid rgba(var(--atom-color-rgb), 0.2) 2px;
        border-bottom: solid rgba(var(--atom-color-rgb), 0) 4px;
        border-left: solid rgba(var(--atom-color-rgb), 0.5) 2px;
    }
    50% {
        border-top: solid rgba(var(--atom-color-rgb), 0.2) 1px;
        border-right: solid rgba(var(--atom-color-rgb), 0) 2px;
        border-bottom: solid rgba(var(--atom-color-rgb), 0.5) 4px;
        border-left: solid rgba(var(--atom-color-rgb), 0.35) 2px;
    }
    75% {
        border-top: solid rgba(var(--atom-color-rgb), 0) 1px;
        border-right: solid rgba(var(--atom-color-rgb), 0.5) 2px;
        border-bottom: solid rgba(var(--atom-color-rgb), 0.35) 4px;
        border-left: solid rgba(var(--atom-color-rgb), 0.2) 2px;
    }
    100% {
        border-top: solid rgba(var(--atom-color-rgb), 0.5) 1px;
        border-right: solid rgba(var(--atom-color-rgb), 0.35) 2px;
        border-bottom: solid rgba(var(--atom-color-rgb), 0.2) 4px;
        border-left: solid rgba(var(--atom-color-rgb), 0) 2px;
    }
}

/* Electron Unit */
.preloader .atom [class^="electron"]::after {
    content: "";
    display: block;
    width: var(--electron-size);
    height: var(--electron-size);
    background: var(--electron-color-hex);
    border-radius: 50%;
    margin-top: calc(var(--electron-size) / -2);
    position: absolute;
    top: 50%;
    left: calc(var(--electron-size) / -1);
    transform: scale(1);
    animation: calc(var(--electron-speed) * 2) electron infinite ease-in-out;
}

.preloader .atom .electron-alpha::after {
    animation: calc(var(--electron-speed-alpha) * 2) electron infinite ease-in-out;
}

.preloader .atom .electron-omega::after {
    animation: calc(var(--electron-speed-omega) * 2) electron infinite ease-in-out;
}

@keyframes electron {
    0% {
        left: calc(var(--electron-size) / -1);
        transform: scale(1);
    }
    12.5% {
        top: 100%;
        transform: scale(1.5);
    }
    25% {
        left: 100%;
        transform: scale(1);
    }
    37.5% {
        top: 0%;
        transform: scale(0.25);
    }
    50% {
        left: calc(var(--electron-size) / -1);
        transform: scale(1);
    }
    62.5% {
        top: 100%;
        transform: scale(1.5);
    }
    75% {
        left: 100%;
        transform: scale(1);
    }
    87.5% {
        top: 0%;
        transform: scale(0.25);
    }
    100% {
        left: calc(var(--electron-size) / -1);
        transform: scale(1);
    }
}

.no-lectures {
    display: flex;
    justify-content: center;
    width: 100%;
    font-size: 4.6rem;
    color: #60d069;
}

.noLecImg {
    width: 50%;
    margin: 2rem auto 0;
}

.choseChargeType .modal-body {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 2rem 1rem;
}
.choseChargeType .modal-body button {
    font-size: 1.6rem;
    background: none;
    padding: 0.5rem 2rem;
    border: none;
    transition: 0.2s all ease;
}
.choseChargeType .modal-body button:first-of-type {
    background: var(--main-color);
    color: #fff;
}
.choseChargeType .modal-body button:last-of-type {
    background: #f1be2e;
    color: #fff;
}
.choseChargeType .modal-body button:hover {
    filter: contrast(1.3);
}