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

html, body {
  padding: 0;
  margin: 0;
}

body {
  min-height: 100vh;
  background: #fff4eb;
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.header, .footer {
  padding: 24px 48px;
  background: #199dec;
}

.header {
  border-bottom: 1px solid lightgray;
}

.footer {
  border-top: 1px solid lightgray;
}

.logo {
  text-decoration: none;
  font-size: 48px;
  font-weight: 700;
  color: white;
}

.content {
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 24px;
}

.ad-container {
  width: 300px;
  height: 300px;
  background: gray;
}

.sign-in-form {
  width: fit-content;
  min-width: 600px;
  margin: 48px auto;
  padding: 24px 48px;
  background: linear-gradient(45deg, #000, 40%, #6de163);
  border: 1px solid lightgray;
  border-radius: 8px;
}

.sign-in-form__title {
  text-align: center;
  color: white;
  font-size: 36px;
  font-weight: 600;
  margin: 0 0 16px;
}

.sign-in-form__input-title {
  display: block;
  color: white;
  font-size: 24px;
  font-weight: 400;
  margin-bottom: 8px;
}

.sign-in-form__input {
  font-size: 20px;
  height: 24px;
  width: 100%;
  margin-bottom: 48px;
}

.sign-in-form__button {
  display: block;
  width: 100%;
  background: #ffa700;
  border-radius: 8px;
  border: 1px solid white;
  color: white;
  font-size: 28px;
  font-weight: 700;
  padding: 12px 48px;
  transition: all 0.3s;
}

.sign-in-form__button:hover,
.sign-in-form__button:focus {
  background: #d98e00;
}