Sign In / Sign Up Style 1
<!--====== SIGNIN ONE PART START ======-->
<section class="signin-area signin-one">
   <div class="container">
      <div class="row justify-content-center">
         <div class="col-lg-5">
            <form action="#">
               <div class="signin-form form-style-two rounded-buttons">
                  <div class="row">
                     <div class="col-md-12">
                        <div class="form-input">
                           <label>Your account will be under this email</label>
                           <div class="input-items default">
                              <input type="text" placeholder="Email" />
                              <i class="lni lni-envelope"></i>
                           </div>
                        </div>
                        <!-- form input -->
                     </div>
                     <div class="col-md-12">
                        <div class="form-input">
                           <label>
                           Name will be used to personalize your experience
                           </label>
                           <div class="input-items default">
                              <input type="text" placeholder="Name" />
                              <i class="lni lni-user"></i>
                           </div>
                        </div>
                        <!-- form input -->
                     </div>
                     <div class="col-md-12">
                        <div class="form-input">
                           <label>Password for your account</label>
                           <div class="input-items default">
                              <input type="password" placeholder="Password" />
                              <i class="lni lni-key"></i>
                           </div>
                        </div>
                        <!-- form input -->
                     </div>
                     <div class="col-md-6">
                        <div class="form-input rounded-buttons">
                           <button
                              class="btn primary-btn rounded-full"
                              type="submit"
                              >
                           Sign In!
                           </button>
                        </div>
                        <!-- form input -->
                     </div>
                     <div class="col-md-6">
                        <div class="form-input rounded-buttons">
                           <button
                              class="btn primary-btn-outline rounded-full"
                              type="submit"
                              >
                           Sign Up
                           </button>
                        </div>
                        <!-- form input -->
                     </div>
                     <div class="col-md-12">
                        <div class="form-input text-center">
                           <p class="text">
                              By signing in you agree with the
                              <a href="javascript:void(0)">Terms and Conditions</a>
                              and
                              <a href="javascript:void(0)">Privacy</a>
                           </p>
                        </div>
                        <!-- form input -->
                     </div>
                  </div>
               </div>
               <!-- signin form -->
            </form>
         </div>
      </div>
      <!-- row -->
   </div>
   <!-- container -->
</section>
<!--====== SIGNIN ONE PART ENDS ======-->
/* ===== Buttons Css ===== */
.signin-one .rounded-buttons .primary-btn {
  background: var(--primary);
  color: var(--white);
  box-shadow: var(--shadow-2);
}
.signin-one .rounded-buttons .active.primary-btn, .signin-one .rounded-buttons .primary-btn:hover, .signin-one .rounded-buttons .primary-btn:focus {
  background: var(--primary-dark);
  color: var(--white);
  box-shadow: var(--shadow-4);
}
.signin-one .rounded-buttons .deactive.primary-btn {
  background: var(--gray-4);
  color: var(--dark-3);
  pointer-events: none;
}

.signin-one .rounded-buttons .primary-btn-outline {
  border-color: var(--primary);
  color: var(--primary);
}
.signin-one .rounded-buttons .active.primary-btn-outline, .signin-one .rounded-buttons .primary-btn-outline:hover, .signin-one .rounded-buttons .primary-btn-outline:focus {
  background: var(--primary-dark);
  color: var(--white);
}
.signin-one .rounded-buttons .deactive.primary-btn-outline {
  color: var(--dark-3);
  border-color: var(--gray-4);
  pointer-events: none;
}

/*===========================
  SING IN SING UP css 
===========================*/
.signin-one {
  padding-top: 100px;
  padding-bottom: 100px;
  background-color: var(--light-2);
}
.signin-one .form-input {
  margin-top: 16px;
}
.signin-one .form-input .main-btn {
  width: 100%;
}
.signin-one .form-input .text {
  font-size: 16px;
  line-height: 24px;
  color: var(--dark-3);
}
.signin-one .form-input .text a {
  color: var(--primary);
}
.signin-one .signin-form {
  background-color: var(--white);
  padding: 40px;
  border: 1px solid var(--gray-4);
  border-radius: 8px;
}
.signin-one .rounded-buttons {
  margin-top: 20px;
}
.signin-one .rounded-buttons .primary-btn {
  width: 100%;
}
.signin-one .rounded-buttons .primary-btn-outline {
  width: 100%;
}
.signin-one .form-input .help-block {
  margin-top: 2px;
}
.signin-one .form-input .help-block .list-unstyled li {
  font-size: 12px;
  line-height: 16px;
  color: var(--error);
}
.signin-one .form-input label {
  font-size: 12px;
  line-height: 18px;
  color: var(--dark-3);
  margin-bottom: 8px;
  display: inline-block;
}
.signin-one .form-input .input-items {
  position: relative;
}
.signin-one .form-input .input-items input, .signin-one .form-input .input-items textarea {
  width: 100%;
  height: 44px;
  border: 2px solid;
  padding-left: 44px;
  padding-right: 12px;
  position: relative;
  font-size: 16px;
}
.signin-one .form-input .input-items textarea {
  padding-top: 8px;
  height: 130px;
  resize: none;
}
.signin-one .form-input .input-items i {
  position: absolute;
  top: 11px;
  left: 13px;
  font-size: 20px;
  z-index: 9;
}
.signin-one .form-input .input-items.default input, .signin-one .form-input .input-items.default textarea {
  border-color: var(--gray-4);
  color: var(--dark-3);
}
.signin-one .form-input .input-items.default input:focus, .signin-one .form-input .input-items.default textarea:focus {
  border-color: var(--primary);
}
.signin-one .form-input .input-items.default input::placeholder, .signin-one .form-input .input-items.default textarea::placeholder {
  color: var(--dark-3);
  opacity: 1;
}
.signin-one .form-input .input-items.default i {
  color: var(--dark-3);
}
.signin-one .form-input .input-items.error input, .signin-one .form-input .input-items.error textarea {
  border-color: var(--error);
  color: var(--error);
}
.signin-one .form-input .input-items.error input::placeholder, .signin-one .form-input .input-items.error textarea::placeholder {
  color: var(--error);
  opacity: 1;
}
.signin-one .form-input .input-items.error i {
  color: var(--error);
}
.signin-one .form-style-two .form-input .input-items input, .signin-one .form-style-two .form-input .input-items textarea {
  border-radius: 5px;
  padding-left: 12px;
  padding-right: 44px;
}
.signin-one .form-style-two .form-input .input-items i {
  left: auto;
  right: 13px;
}

.signin-content .signin-title {
  font-size: 24px;
  line-height: 30px;
  color: var(--black);
}
.signin-content .text {
  font-size: 16px;
  line-height: 24px;
  color: var(--dark-3);
  margin-top: 8px;
}
Sign In / Sign Up Style 2
Sign In / Sign Up Style 5
Sign In / Sign Up Style 3
Sign In / Sign Up Style 4
Sign In / Sign Up Style 6