:root {
  --main-color: #111827;
  --accent-color: #3b82f6;
  --bg-color: #f9fafb;
  --success: #38e580;
  --error: #ef4444;
  --animation: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --border-color: rgb(226, 218, 218);
}

body {
  font-family: "Roboto", sans-serif;
  background-color: var(--bg-color);
  color: var(--main-color);
}

/* #region reser */
h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 0;
}

ul,
ol {
  list-style-type: none;
  margin: 0;
  padding-left: 0;
}

a {
  text-decoration: none;
  color: inherit;
}

button {
  cursor: pointer;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}
/* #endregion reset */

/* #region container */
.container {
  padding-left: 20px;
  padding-right: 20px;
  margin: 0 auto;
  min-width: 320px;
  max-width: 375px;
}
@media screen and (min-width: 768px) {
  .container {
    max-width: 768px;
    padding-left: 32px;
    padding-right: 32px;
  }
}
@media screen and (min-width: 1200px) {
  .container {
    max-width: 1200px;
  }
}

/* #endregion container */

section {
  padding-top: 40px;
  padding-bottom: 20px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  border: 0;
  padding: 0;
  white-space: nowrap;
  clip-path: inset(100%);
  clip: rect(0 0 0 0);
  overflow: hidden;
}

/* #region hero */
.title {
  font-size: 32px;
  margin-bottom: 20px;
}

.accent-text {
  color: var(--accent-color);
}

.descr {
  font-size: 18px;
  margin-bottom: 10px;
}

@media only screen and (min-width: 768px) {
  .title {
    font-size: 52px;
    margin-bottom: 40px;
  }
}
@media only screen and (min-width: 1200px) {
  .descr {
    font-size: 24px;
    width: 720px;
  }
}

/* #endregion hero */

/* #region test */
.test-item {
  margin-bottom: 20px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
}

.question {
  margin-bottom: 15px;
}

.options {
  display: block;
  font-size: 18px;

  transition: transform var(--animation);
}

.options:not(:last-child) {
  margin-bottom: 10px;
}

.options:hover {
  transform: scale(1.03);
}

input[type="radio"] {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid #adb5bd;
  border-radius: 50%;
  transition: var(--transition);
  position: relative;
  cursor: pointer;
}

input[type="radio"]:checked {
  border-color: var(--primary-color);
  background-color: var(--primary-color);
  /* border: 2px solid #38e580; */
}

input[type="radio"]:checked::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 10px;
  /* background: #38e580; */

  border-radius: 50%;
}

input[type="radio"].success {
  border: 2px solid var(--success);
}

input[type="radio"].success::after {
  background-color: var(--success);
}

input[type="radio"].error {
  border: 2px solid var(--error);
}
input[type="radio"].error::after {
  background-color: var(--error);
}

.next-button {
  background-color: var(--accent-color);
  color: var(--bg-color);
  border: 1px solid var(--bg-color);
  border-radius: 6px;
  padding: 15px;
  width: 150px;
  display: block;
  margin: 0 auto;
  margin-bottom: 15px;

  transition: color var(--animation), background-color var(--animation),
    border-color var(--animation);
}

.next-button:hover,
.next-button:focus {
  background-color: var(--bg-color);
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.next-button:disabled {
  color: var(--border-color);
  background-color: #79a8f4;
  border-color: var(--border-color);
  cursor: not-allowed;
}

.answer-wrapper {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  /* text-align: center; */
}
.answer-result,
.explanation-text {
  margin-top: 1rem;
}

/* #endregion test */