Рассмотрим, как сверстать две формы: одну для авторизации, вторую для регистрации пользователя. Данные формы вы можете адаптировать под себя: дизайн у них довольно простой, так же как сам код. Верстать мы будем по макету из Figma с использованием препроцессора Sass.

Навигация по статье

Полезные ссылки

Посмотреть пример формы: https://toni.codelab.pro/auth-page/sign-in.html
Макеты форм в Figma: https://clck.ru/32FjZW
Стартовый проект для верстки: https://github.com/toni-wheel/base-sass
Статья про Flexbox: https://codelab.pro/podrobnoe-rukovodstvo-po-css-flexbox/
Статья про позиционирование: https://codelab.pro/poziczionirovanie-v-css/
Статья про препроцессор Sass: https://codelab.pro/rukovodstvo-dlya-nachinayushhih-po-sass/

Разметка страницы авторизации (sign-in.html)

<!DOCTYPE html>
<html lang="ru">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="./css/style.css" />
    <title>Sign in</title>
  </head>
  <body>
    <div class="container">
      <section class="form">
        <a href="#" class="form__logo logo">Your Logo</a>
        <div class="form__content">
          <h1 class="form__title">Sign in</h1>
          <p class="form__subtitle">If you don’t have an account register</p>
          <p class="form__subtitle">
            You can
            <a href="./sign-up.html" class="form__link"> Register here !</a>
          </p>
          <form action="#" class="form__form-box form-box">
            <div class="form-box__input-box input-box">
              <label class="input-box__info" for="email">Email</label>
              <label class="input-box__icon" for="email"
                ><img src="./image/svg/email.svg" alt="email"
              /></label>
              <input
                type="email"
                name="email"
                id="email"
                placeholder="Enter your email address"
              />
            </div>
            <div class="form-box__input-box input-box">
              <label class="input-box__info" for="password">Password</label>
              <label class="input-box__icon" for="password"
                ><img src="./image/svg/password.svg" alt="password"
              /></label>
              <input
                type="password"
                name="password"
                id="password"
                placeholder="Enter your password"
              />
            </div>
            <div class="form-box__btn-box btn-box">
              <button type="submit">Login</button>
            </div>
            <div class="form-box__social">
              <span class="form-box__social-info">or continue with</span>
              <div class="form-box__social-items">
                <a href="#"
                  ><img src="./image/svg/facebook.svg" alt="facebook"
                /></a>
                <a href="#"
                  ><img src="./image/svg/apple.svg" alt="facebook"
                /></a>
                <a href="#"
                  ><img src="./image/svg/google.svg" alt="facebook"
                /></a>
              </div>
            </div>
          </form>
        </div>
      </section>
      <section class="promo">
        <div class="promo__box">
          <div class="promo__content">
            <img src="./image/Saly.png" alt="Saly" class="promo__image" />
            <h1 class="promo__title">Sign in to name</h1>
            <p class="promo__subtitle">Lorem Ipsum is simply</p>
          </div>
        </div>
      </section>
    </div>
    <script src="./js/app.js"></script>
  </body>
</html>

Разметка страницы регистрации (sign-up.html)

<!DOCTYPE html>
<html lang="ru">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="./css/style.css" />
    <title>Sign up</title>
  </head>
  <body>
    <div class="container">
      <section class="form">
        <a href="#" class="form__logo logo">Your Logo</a>
        <div class="form__content">
          <h1 class="form__title">Sign up</h1>
          <p class="form__subtitle">If you already have an account register</p>
          <p class="form__subtitle">
            You can
            <a href="./sign-in.html" class="form__link"> Login here !</a>
          </p>
          <form action="#" class="form__form-box form-box">
            <div class="form-box__input-box input-box">
              <label class="input-box__info" for="email">Email</label>
              <label class="input-box__icon" for="email"
                ><img src="./image/svg/email.svg" alt="email"
              /></label>
              <input
                type="email"
                name="email"
                id="email"
                placeholder="Enter your email address"
              />
            </div>
            <div class="form-box__input-box input-box">
              <label class="input-box__info" for="user">User name</label>
              <label class="input-box__icon" for="user"
                ><img src="./image/svg/user.svg" alt="User name"
              /></label>
              <input
                type="text"
                name="user"
                id="user"
                placeholder="Enter your user name"
              />
            </div>
            <div class="form-box__input-box input-box">
              <label class="input-box__info" for="password">Password</label>
              <label class="input-box__icon" for="password"
                ><img src="./image/svg/password.svg" alt="password"
              /></label>
              <input
                type="password"
                name="password"
                id="password"
                placeholder="Enter your password"
              />
            </div>
            <div class="form-box__input-box input-box">
              <label class="input-box__info" for="confrim-password"
                >Confrim password</label
              >
              <label class="input-box__icon" for="confrim-password"
                ><img src="./image/svg/password.svg" alt="confrim password"
              /></label>
              <input
                type="password"
                name="confrim-password"
                id="confrim-password"
                placeholder="Confrim your password"
              />
            </div>
            <div class="form-box__btn-box btn-box">
              <button type="submit">Register</button>
            </div>
          </form>
        </div>
      </section>
      <section class="promo">
        <div class="promo__box">
          <div class="promo__content">
            <img src="./image/Saly.png" alt="Saly" class="promo__image" />
            <h1 class="promo__title">Sign up to name</h1>
            <p class="promo__subtitle">Lorem Ipsum is simply</p>
          </div>
        </div>
      </section>
    </div>
    <script src="./js/app.js"></script>
  </body>
</html>

Стили для левой колонки (form.scss)

.form {
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  @media (max-width: 1200px) {
    padding: 0 20px;
  }
  &__logo {
    margin-top: 31px;
    margin-left: 42px;
  }
  &__content {
    padding-top: 102px;
    padding-bottom: 102px;
    width: 100%;
    max-width: 431px;
    align-self: center;
  }
  &__title {
    font-weight: 500;
    font-size: 30px;
    line-height: 45px;
    color: #000000;
    display: block;
    margin-bottom: 22px;
  }
  &__subtitle {
    font-weight: 400;
    font-size: 16px;
    line-height: 24px;
    color: #000000;
    margin-bottom: 6px;
    &:last-of-type {
      margin-bottom: 52px;
    }
  }
  &__link {
    font-weight: 600;
    font-size: 16px;
    line-height: 24px;
    color: #0c21c1;
  }
}

.logo {
  font-weight: 600;
  font-size: 20px;
  line-height: 30px;
  color: #000000;
}

.input-box {
  margin-bottom: 49px;
  &:last-of-type {
    margin-bottom: 0;
  }
  &__info {
    display: block;
    margin-bottom: 11px;
    font-weight: 500;
    font-size: 13px;
    line-height: 20px;
    color: #999999;
    user-select: none;
  }
  & > input {
    box-sizing: border-box;
    position: relative;
    width: 100%;
    border-bottom: 2px solid #999999;
    padding-bottom: 9px;
    padding-left: 27px;
    color: #000842;
    &:focus {
      border-bottom: 2px solid #000842;
    }
  }
  &__icon {
    position: absolute;
    user-select: none;
  }
}

.btn-box {
  margin-top: 109px;
  & > button {
    background: #0c21c1;
    box-shadow: 0px 4px 26px rgba(0, 0, 0, 0.25);
    border-radius: 32px;
    font-weight: 500;
    font-size: 17px;
    line-height: 26px;
    color: #ffffff;
    width: 100%;
    padding-top: 14px;
    padding-bottom: 14px;
    text-align: center;
    cursor: pointer;
  }
}

.form-box {
  &__social {
    margin-top: 39px;
    display: flex;
    flex-direction: column;
    align-items: center;
    &-info {
      font-weight: 500;
      font-size: 16px;
      line-height: 24px;
      color: #b5b5b5;
      margin-bottom: 31px;
    }
    &-items {
      display: flex;
      & > a {
        margin-right: 20px;
        &:last-of-type {
          margin-right: 0;
        }
      }
    }
  }
}

Стили для правой колонки (promo.scss)

.promo {
  flex: 0 0 735px;
  display: flex;
  flex-direction: column;
  padding: 21px;
  @media (max-width: 1200px) {
    display: none;
  }
  &__box {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000842;
    border-radius: 15px;
  }
  &__image {
    width: 100%;
    max-width: 559px;
    height: auto;
    margin-bottom: 90px;
  }
  &__title {
    font-weight: 600;
    font-size: 40px;
    line-height: 60px;
    color: #ffffff;
    margin-bottom: 4px;
  }
  &__subtitle {
    display: block;
    font-weight: 300;
    font-size: 20px;
    line-height: 30px;
    color: #ffffff;
  }
}

Импорты стилей в style.scss

@import "_reset";
@import "_settings";
@import "_form";
@import "_promo";

111