* {
    padding: 0;
    margin: 0;
    border: 0;
}

*,
*:before,
*:after {
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

:focus,
:active {
    outline: none;
}

a:focus,
a:active {
    outline: none;
}

nav,
footer,
header,
aside {
    display: block;
}

html,
body {
    height: 100%;
    width: 100%;
    font-size: 100%;
    line-height: 1;
    font-size: 14px;
    -ms-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
}

input,
button,
textarea {
    font-family: inherit;
}

input::-ms-clear {
    display: none;
}

button {
    cursor: pointer;
}

button::-moz-focus-inner {
    padding: 0;
    border: 0;
}

a,
a:visited {
    text-decoration: none;
}

a:hover {
    text-decoration: none;
}

ul li {
    list-style: none;
}

img {
    vertical-align: top;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-size: 18px;
    font-family: Myriad-L, sans-serif;
    color: #fff;
    line-height: 1.2;
}

a {
    color: #fff;
}

@font-face {
    font-family: Myriad-L;
    src: url(fonts/MyriadPro-Light.ttf);
}

@font-face {
    font-family: Myriad-R;
    src: url(fonts/MyriadPro-Regular.woff);
}


/* ------------------------------------------------------------------ */

h1 {
    color: #fff;
    margin: 0 auto;
    margin-bottom: 10px;
    letter-spacing: 0.75px;
}

h6 {
    font-weight: 300;
    color: rgba(255, 255, 255, 0.7);
    text-align: center;
}

h3 {
    letter-spacing: 0.5px;
    text-align: center;
    display: grid;
    align-self: center;
}

h2 {
    font-weight: 300;
}


/* ----------------------------Top Menu--------------------------------- */

header {
    width: 100%;
    height: 45px;
    background-color: rgba(255, 255, 255, 0.3);
    display: flex;
}

.content {
    width: 92%;
    margin: auto auto;
    display: flex;
    justify-content: space-between;
}

.theme {
    display: flex;
}

.theme a {
    margin-left: 20px;
    font-size: 15px;
}


/* ----------------------------------------------------------------- */

body {
    background: #eb3474;
}

.gradient {
    width: 100%;
    height: 100%;
    background: linear-gradient(#2394F0, #eb3474);
    position: absolute;
    z-index: -99;
}

.container {
    width: 100%;
    display: flex;
    flex-direction: column;
}

.wrapper {
    display: flex;
    margin: 30px auto;
    width: 92%;
    max-width: 1000px;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    filter: drop-shadow(0px 10px 20px rgba(0, 0, 0, 0.3));
    padding: 0px 20px;
    transition: 0.5s;
}

.wrap-side {
    display: flex;
    flex-direction: column;
    margin: 40px 40px;
    width: 50%;
}

.set,
.value {
    width: 90%;
    margin: 0 auto;
    padding: 5px;
}

#sets,
#values {
    display: flex;
    flex-direction: column;
}

.input-wrap {
    margin: 0;
    display: flex;
    flex-direction: row;
}

.text {
    margin: auto 0;
    white-space: pre;
    letter-spacing: 0.75px;
}

.input {
    width: 100%;
}

input[type=set],
input[type=value] {
    width: 100%;
    height: 44px;
    background: none;
    border: 3px solid rgba(255, 255, 255, 0.5);
    border-radius: 8px;
    font-size: 18px;
    font-family: Myriad-R;
    color: #fff;
    margin: 5px auto;
    padding: 0px 0px 0px 10px;
}

input[type=problem] {
    width: 100%;
    height: 44px;
    background: none;
    border: 3px solid rgba(255, 255, 255, 0.5);
    border-radius: 8px;
    font-size: 18px;
    color: #fff;
    padding: 0px 0px 0px 10px;
    margin-top: 5px;
}

input[type=button] {
    height: 40px;
    padding: 0 25px 0 25px;
    background: rgba(255, 255, 255, 0.45);
    color: white;
    border-radius: 22px;
    cursor: pointer;
    font-size: 18px;
    font-family: Myriad-R;
    transition: 1s;
}

input[type=button]:hover {
    background-color: rgba(255, 255, 255, 0.7);
    transition: 1s;
}

input[type=result] {
    height: 44px;
    width: 100%;
    margin: 10px 0;
    background: rgba(255, 255, 255, 0.45);
    color: white;
    border-radius: 8px;
    font-size: 18px;
    font-family: Myriad-R;
    cursor: default;
    padding: 0px 0px 0px 10px;
    text-overflow: clip;
}

input[type=table-start] {
    height: 44px;
    width: 100%;
    margin: 0px 0;
    background: rgba(255, 255, 255, 0.45);
    color: white;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    font-size: 18px;
    font-family: Myriad-R;
    cursor: default;
    padding: 0px 0px 0px 10px;
}

input[type=table-mid] {
    height: 44px;
    width: 100%;
    margin: 0px 0;
    background: rgba(255, 255, 255, 0.45);
    color: white;
    font-size: 18px;
    font-family: Myriad-R;
    cursor: default;
    padding: 0px 0px 0px 10px;
}

input[type=table-end] {
    height: 44px;
    width: 100%;
    margin: 0px 0;
    background: rgba(255, 255, 255, 0.45);
    color: white;
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
    font-size: 18px;
    font-family: Myriad-R;
    cursor: default;
    padding: 0px 0px 0px 10px;
}

.wrap-result {
    width: 100%;
    margin: 20px 0;
}

::placeholder {
    color: rgba(255, 255, 255, 0.35);
    font-size: 18px;
    font-family: Myriad-R;
}

.addSet,
.addValue {
    margin: 20px auto;
}

.buttons {
    margin: 0 auto;
    display: flex;
}

.button {
    margin: 15px 5px 5px 5px;
}

.description {
    width: 90%;
    margin: 0 auto;
}

.operations {
    display: flex;
    flex-direction: column;
    margin: 30px auto;
}

.operation {
    display: flex;
    margin: 5px;
}

.operation-bg {
    background: rgba(255, 255, 255, 0.2);
    width: 22px;
    height: 22px;
    border-radius: 11px;
    margin-right: 8px;
}

.step-by-step {
    width: 100%;
    margin: 25px 38px 40px 50px;
    display: flex;
    flex-direction: column;
}

.hide {
    display: none;
    transition: 0.5s;
}

.close {
    transition: 0.75s;
    opacity: 0;
}

.close-button {
    position: absolute;
    right: 2%;
    transform: translate(0, -3px);
    margin: 25px 5px 0px 0px;
    cursor: pointer;
    width: 20px;
    height: 20px;
    opacity: 85%;
    transition: 0.5s;
}

.close-button:hover {
    opacity: 100%;
    transition: 0.5s;
}

.question-mark-button {
    width: 20px;
    margin: -1px 10px 0px 10px;
    opacity: 85%;
    transition: 0.5s;
}

.question-mark-button:hover {
    opacity: 100%;
    transition: 0.5s;
}

.input-wrap img {
    margin: auto 10px;
    height: 50px;
}


/* ------------------Main-------------- */

.calculator {
    display: flex;
    flex-direction: column;
    margin: 20px auto;
    width: 90%;
    max-width: 250px;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    padding: 20px;
    transition: 1s;
}

.calculator img {
    height: 100px;
    margin: 20px auto;
}

.calculator:hover {
    background-color: rgba(255, 255, 255, 0.5);
    transition: 1s;
}

.calculator h1 {
    margin: 0 auto;
    text-align: center;
    font-size: 23px;
    max-width: 200px;
}


/* ------------------New-------------- */

.current {
    color: rgba(255, 255, 255, 0.65);
}

.no-top-margin {
    margin-top: 0;
}

.title {
    margin-top: 25px;
    margin-bottom: 15px;
    font-size: 24px;
    font-family: Myriad-R;
}

.operation h6 {
    text-align: left;
}

.operation-bg {
    min-width: 22px;
    max-width: 22px;
}


/* ------------------Knowledgebase-------------- */

.knowledge {
    flex-direction: column;
}

.knowledge-wrap {
    width: 95%;
    margin: 20px auto;
    display: flex;
    flex-direction: column;
}

.knowledge-main-title {
    margin: 15px auto;
}

.knowledge-title {
    text-align: left;
    margin: 5px 0;
}

.knowledge-desc {
    text-align: justify;
}

.strong {
    color: white;
}

.overline {
    text-decoration: overline;
}

@media screen and (max-device-width: 650px) and (min-device-width: 0px) {
    .wrapper {
        flex-direction: column;
        padding: 0;
    }
    .wrap-side {
        width: 85%;
        margin: 20px auto;
    }
    .buttons {
        flex-direction: column;
        margin-top: 15px;
    }
    .button {
        margin: 10px auto;
    }
    .step-by-step {
        width: auto;
        text-align: center;
    }
    .knowledge-wrap {
        width: 80%;
    }
    h3 {
        font-size: 14px;
    }
    .theme a {
        margin-left: 15px;
        font-size: 14px;
    }
}