*,
*::after,
*::before,
a {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  list-style: none;
}

html {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

body {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  /* justify-content: flex-start; */
  line-height: 1.5;
  font-family: "Istok Web", sans-serif;
  font-weight: 400;
  min-width: 1400px;
  font-size: 18px;
}

/* header */

header {
  margin: 0 30px;

  padding: 0 30px;
  margin-top: 47px;
  display: flex;
  justify-content: space-between;
  align-items: end;
  padding-bottom: 16px;
  position: relative;
  margin-bottom: 30px;
}

header::after {
  position: absolute;
  content: "";
  display: block;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: #000;
  box-shadow: 0px 3px 12px 0px rgba(0, 0, 0, 0.7);
}

.header__title {
  font-family: "Goblin One", serif;
  font-weight: 400;
  font-size: 32px;
  line-height: 40px;
}

.header__title__text {
  color: #0000ff;
}

.header__text {
  font-weight: 400;
  font-size: 24px;
  line-height: 34.55px;
}

.header__link {
  color: #000;
  font-size: 18px;
  line-height: 25px;
  cursor: pointer;
  text-decoration: underline;
}

/* author */
.author__container {
  position: fixed;
  z-index: 10;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: #fff;
  padding: 30px 50px;
  display: none;
}

.author__header {
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
}

.author__header__title {
  font-weight: 700;
  font-size: 32px;
  line-height: 36px;
  font-family: "Times New Roman", Times, serif;
}

.author__content {
  display: flex;
  gap: 91px;
}

.closeModal {
  position: absolute;
  top: 30px;
  right: 20px;
  width: 40px;
  height: 40px;
  opacity: 1;
  cursor: pointer;
  transition: opacity ease 0.5s;

  &:hover {
    opacity: 0.4;
  }
}

.closeModal::before,
.closeModal::after {
  content: "";
  position: absolute;
  top: 10px;
  display: block;
  width: 40px;
  height: 3px;
  background: #000;
}

.closeModal::before {
  transform: rotate(45deg);
}

.closeModal::after {
  transform: rotate(-45deg);
}

.author__text__list h3 {
  font-family: "Times New Roman", Times, serif;
  font-weight: 400;
  font-size: 22px;
  line-height: 25px;
  margin-bottom: 10px;
}

.author__text {
  font-size: 14px;
  line-height: 20px;
  margin-bottom: 30px;
}

.author__content img {
  width: 312px;
  height: 334px;
}

/* main */

main {
  display: flex;
  gap: 47px;
  padding: 0 30px 130px;
}

/* sadebar */

.sadebar {
  padding-left: 35px;
  width: 28%;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.sadebar__gipos {
  display: flex;
  flex-direction: column;
  margin-bottom: 20px;
  gap: 7px;
}
.sadebar__title {
  font-weight: 700;
  font-size: 18px;
  line-height: 26px;
  padding-left: 10px;
  border-bottom: 1px solid #afafaf;
}
/* .sadebar__lin:active {
  background: red;
} */
.sadebar__lin,
.sadebar__tabel,
.sadebar__link {
  display: block;
  font-size: 18px;
  line-height: 25px;
  color: #000;
  padding-left: 10px;
  cursor: pointer;
  text-decoration: none;
  /* text-decoration: underline; */
}

.sadebar__tabel {
  padding-left: 30px;
  position: relative;
  margin-left: 10px;
}

.sadebar__tabel::after {
  position: absolute;
  left: 0;
  top: 0;
  content: "";
  display: block;
  height: 24px;
  width: 24px;
  background: url(img/Vector.svg) no-repeat center;
}

.sadebar__link.active {
  background: #fdff9a;
  text-decoration: none;
}

.main__text__container {
  width: 70%;
  display: none;
}

.main__text__container.active {
  display: block;
}

.main__text {
  font-size: 18px;
  line-height: 25px;
  font-size: italic;
  margin-bottom: 30px;
}

/* .stepen {
    font-size: 10px;
    vertical-align: top;
  } */

/* Check */

.hypotheses {
  display: none;
}
.hypotheses.active {
  display: block;
}
.check__p {
  font-weight: 700;
  font-size: 16px;
  line-height: 23px;
  margin-bottom: 5px;
}

.check__box {
  display: flex;
  justify-content: space-between;
}

.check__list {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 20px;
  position: relative;
}

.check__list_2 {
  font-size: 35px;
  line-height: 18px;
}

.input__container {
  position: relative;
}

.check__input__mini {
  position: absolute;
  top: -10px;
  right: -26px;
  width: 25px;
  height: 25px;
  font-size: 14px;
  line-height: 14px;
  text-align: center;
  padding: 5px;
  border: none;
  border-radius: 8px;
  background: #efefef;
  box-shadow: 0px 4px 4px 0px #00000040 inset;
}

.chek__input {
  font-size: 35px;
  font-weight: 400;
  line-height: 18px;
  text-align: right;
  padding: 15px 10px;
  max-width: 125px;
  border: none;
  border-radius: 8px;
  background: #efefef;
  box-shadow: 0px 4px 4px 0px #00000040 inset;
}

.input_2 {
  width: 90px;
  height: 60px;
}

.degrees {
  position: absolute;
  top: -7px;
  right: -170px;
}

.generate-number-btn {
  color: #0158bb;
  text-decoration: underline;
  line-height: 25px;
  font-size: 18px;
  cursor: pointer;
  margin-left: 15px;
  user-select: none;
}

.clear-number-btn {
  display: none;
  position: relative;
  color: #a8a8a8;
  font-size: 18px;
  margin-left: 15px;
  cursor: pointer;
  user-select: none;
}

.clear-number-btn-1 {
  display: none;
  color: #a8a8a8;
  font-size: 18px;
  margin-left: 15px;
  cursor: pointer;
  user-select: none;
}

.clear-number-btn .check__icon {
  cursor: pointer;
  position: absolute;
  top: 45%;
  right: -10px;
  transform: translateY(-50%);
}

.clear-number-btn-1 .check__icon {
  cursor: pointer;
  position: absolute;
  top: 45%;
  right: -10px;
  transform: translateY(-50%);
}

.clear-number-btn .check__icon:before,
.clear-number-btn .check__icon:after {
  content: "";
  position: absolute;
  width: 24px;
  height: 2px;
  background: #ff0000;
}

.clear-number-btn-1 .check__icon:before,
.clear-number-btn-1 .check__icon:after {
  content: "";
  position: absolute;
  width: 24px;
  height: 2px;
  background: #ff0000;
}

.check__icon:before {
  transform: rotate(45deg);
}

.check__icon:after {
  transform: rotate(-45deg);
}

.answer {
  display: none;
}

.answer .answer__block {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #fffbe4;
  padding: 15px;
  margin-bottom: 15px;
  width: fit-content;
  min-width: 300px;
  max-width: 345px;
}

.answer__block .answer__icon {
  width: 30px;
  height: 30px;
}

.answer__block .answer__icon__text {
  font-weight: 700;
}

.answer__block .answer__text {
  font-size: 16px;
}

.answer__container {
  display: flex;
  align-items: center;
  gap: 10px;
}

.check__text {
  text-decoration: underline;
  color: #0158bb;
  cursor: pointer;
  margin-left: 15px;
  font-size: 18px;
  line-height: 25px;
}

.btn__check {
  padding: 14px 65px;
  font-size: 24px;
  line-height: 35px;
  color: #fff;
  width: fit-content;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background: linear-gradient(87.63deg, #ff9736 5.19%, #cb7422 125.08%);
}

.btn__check:hover {
  background: linear-gradient(87.63deg, #985f2a 5.19%, #815022 125.08%);
}

.action__box {
  display: flex;
  flex-direction: column;
  gap: 45px;
}

.action__list {
  display: flex;
  justify-content: end;
  align-items: center;
  gap: 20px;
  position: relative;
  cursor: pointer;
}

.action__text {
  font-size: 16px;
  line-height: 23px;
  color: #c1c1c1;
  text-decoration: underline;
  background: none;
  padding: 3px 10px;
}

.action__list.active .action__text {
  background: #3c487d;
  color: #fff;
  text-decoration: none;
}

.action__ic {
  width: 3px;
  height: 49px;
  position: absolute;
  right: 11px;
  top: 25px;
  background-color: #ddd;
}

.action__icon {
  position: relative;
  width: 25px;
  height: 25px;
  border-radius: 50%;
  box-shadow: 0px 4px 4px 0px #00000040 inset;
}

.action__list.active .action__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: block;
  width: 16px;
  height: 16px;
  background: #3c487d;
  border-radius: 50%;
}
/* second page */

.first__formul {
  display: block;
  margin-bottom: 55px;
}

.formul_container {
  display: flex;
  gap: 25px;
  /* gap: 95px; */
  justify-content: space-between;
  margin-bottom: 65px;
}

.formul__container {
  display: flex;
  gap: 5px;
}

.formul__list {
  width: 100%;
  padding-right: 15px;
  border-right: 1px solid #ddd;
}

.formul__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 5px;
  width: 100%;
  gap: 25px;
}

.formul {
  position: relative;
  cursor: pointer;
  width: 500px;
  height: 40px;
}

.formul1 {
  background: url(img/formul1.png) no-repeat;
}

.formul2 {
  background: url(img/formul2.png) no-repeat;
}

.formul3 {
  background: url(img/formul3.png) no-repeat;
}

.formul4 {
  background: url(img/formul4.png) no-repeat;
}

.formul5 {
  background: url(img/formul5.png) no-repeat;
  height: 77px;
}

.formul__numbers {
  cursor: pointer;
  padding: 10px 17px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0px 5px 10px 2px rgba(34, 60, 80, 0.2) inset;
  font-size: 25px;
  line-height: 25px;
  width: 47.56px;
}

.formul__numbers:hover {
  background: #ddd;
}

.formul__legend {
  box-shadow: 0px 5px 10px 2px rgba(34, 60, 80, 0.2) inset;
  font-size: 18px;
  padding: 7px 40px;
  height: fit-content;
  border-radius: 16px;
  margin: auto 0;
  width: fit-content;
  cursor: pointer;
}

.formul__item.active .formul__numbers,
.formul__item.active.formul__legend {
  background: #fdff9a;
}

.formul__item.active .formul::after {
  position: absolute;
  z-index: 5;
  content: "";
  display: block;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  background: #faff00;
  opacity: 22%;
}

/* foormul__text__container */

.formul__text__container {
  display: none;
}

.formul__text__container.active {
  display: block;
  background: rgb(255 250 222);
  margin-bottom: 75px;
  padding: 30px 40px 75px 47px;
}

.formul__title {
  font-weight: 400;
  font-size: 24px;
  line-height: 34.55px;
  margin-bottom: 15px;
}

.formul__text {
  font-size: 18px;
  line-height: 25px;
  margin-bottom: 20px;
}

.formul__text.italic {
  font-style: italic;
}

.formul__img {
  margin-bottom: 30px;
}

/* calculator */

.calculator__container {
  display: flex;
  gap: 36px;
}

.calculator__list {
  width: 50%;
}

.calculator__items__num {
  display: flex;
  margin-bottom: 35px;
  gap: 16px;
}

.calculator__num__element__container {
  display: flex;
  align-items: end;
  gap: 22px;
}

.calculator__num__title {
  font-weight: 700;
  font-size: 16px;
  line-height: 23px;
  margin-bottom: 5px;
}

.calculator__num__element__text {
  font-weight: 400;
  font-size: 16px;
  line-height: 20px;
  font-style: italic;
  margin-bottom: 15px;
}

.calculator__items__container {
  display: flex;
  align-items: center;
  gap: 10px;
}

.calculator__inpit {
  outline: none;
  border-radius: 8px;
  text-align: end;
  padding: 10px 15px;
  border: none;
  box-shadow: 0px 1px 7px 1px rgba(34, 60, 80, 0.2) inset;
  font-family: "Istok Web", sans-serif;
  font-weight: 400;
  color: #000;
  font-size: 17px;
  line-height: 17px;
}

.year__sp {
  width: 125px;
}

.year__up {
  width: 52px;
}

.calculator__img {
  width: 455px;
  height: 295px;
}

.second {
  margin-top: 30px;
}

.calculator__element__container {
  width: 20%;
}

.calculator__element__container:nth-child(1) {
  width: 20%;
}

.calculator__element__container:nth-child(2) {
  width: 10%;
}

.calculator__grid {
  display: flex;
  gap: 10px;
}

.calculator__header {
  margin-bottom: 10px;
  font-size: 14px;
  line-height: 17px;
}

.calculator__header span {
  font-weight: 700;
}

.calculator__grid .calculator__inpit {
  margin-bottom: 10px;
}

.calculator__grid .infinity {
  font-size: 45px;
  height: 44px;
  font-weight: 400;
  pointer-events: none;
}

.calculator__grid .calculator__designations {
  margin-bottom: 37px;
  margin-top: 22px;
}

.calculator__designations {
  font-size: 14px;
  line-height: 17px;
  font-weight: 700;
}

.calculator__designations.green {
  color: #008000;
}

.calculator__designations.red {
  color: #ff0000;
}

.calculator__designations.yellow {
  color: #ffa500;
}

.calculator__designations.blue {
  color: #0091b1;
}

.calculator__designations.perpel {
  color: #800080;
}

.calculator__designations.cyan {
  color: #0000ff;
}

.calculator__grid .calculator__inpit {
  width: 88px;
}

/* footer */

footer {
  margin: auto 0 0;
  background: #7c7c7c;
  padding: 35px 65px 105px;
  display: flex;
  gap: 5px;
  color: #fff;
  font-size: 16px;
  line-height: 23px;
}

.calculator__chart {
  box-shadow: 0px 1px 7px 1px rgba(34, 60, 80, 0.2) inset;
  background-color: #f8f8f8;
  padding: 5px;
  max-width: 455px;
  max-height: 295px;
}

.calculator__chart .calculator__label {
  position: absolute;
  color: #000;
  font-size: 9px;
  font-style: italic;
  font-weight: 400;
  line-height: 17px;
}

.calculator__chart .calculator__label.label_x {
  margin-top: 270px;
  margin-left: 422px;
}

.calculator__chart .calculator__label.label_y {
  margin-top: 2px;
}

.calculator__chart .calculator__chart_text {
  display: none;
  position: absolute;
  width: 233px;
  transform: rotate(-22deg);
  margin-top: 140px;
  margin-left: 198px;
  color: #000;
  font-family: Inter;
  font-size: 12px;
  font-style: normal;
  font-weight: 400;
  line-height: normal;
  font-family: "Istok Web";
}

.calculator__chart #mychart {
  background-color: #f8f8f8;
}