/* btn-1 */

/* <div class="btn-1">
  <h2>Login</h2>
  <form>
    <div class="user-box">
      <input type="text" name="" required="">
      <label>Username</label>
    </div>
    <div class="user-box">
      <input type="password" name="" required="">
      <label>Password</label>
    </div>
    <a href="#">
      <span></span>
      <span></span>
      <span></span>
      <span></span>
      Submit
    </a>
  </form>
</div> */

.btn-1 {
    position: relative;
    display: inline-block;
    padding: 10px 20px;
    color: #ffffff;
    font-size: 16px;
    text-decoration: none;
    text-transform: uppercase;
    overflow: hidden;
    transition: 0.5s;
    margin-top: 40px;
    letter-spacing: 4px;
    background-color: var(--blue);
    border-radius: 5px;
}

.btn-1:hover {
    background: var(--blue);
    color: #fff;
    border-radius: 5px;
    box-shadow: 0 0 5px var(--blue), 0 0 25px var(--blue), 0 0 50px var(--blue),
        0 0 100px var(--blue);
}

.btn-1 span {
    position: absolute;
    display: block;
    margin: 1px;
}

.btn-1 span:nth-child(1) {
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    padding: 1px;
    background: linear-gradient(90deg, transparent, var(--blue));
    animation: btn-anim1 1s linear infinite;
}

@keyframes btn-anim1 {
    0% {
        left: -100%;
    }
    50%,
    100% {
        left: 100%;
    }
}

.btn-1 span:nth-child(2) {
    top: -100%;
    right: 0;
    width: 2px;
    padding: 1px;
    height: 100%;
    background: linear-gradient(180deg, transparent, #aee5ff);
    animation: btn-anim2 1s linear infinite;
    animation-delay: 0.25s;
}

@keyframes btn-anim2 {
    0% {
        top: -100%;
    }
    50%,
    100% {
        top: 100%;
    }
}

.btn-1 span:nth-child(3) {
    bottom: 0;
    right: -100%;
    width: 100%;
    height: 2px;
    padding: 1px;
    background: linear-gradient(270deg, transparent, #aee5ff);
    animation: btn-anim3 1s linear infinite;
    animation-delay: 0.5s;
}

@keyframes btn-anim3 {
    0% {
        right: -100%;
    }
    50%,
    100% {
        right: 100%;
    }
}

.btn-1 span:nth-child(4) {
    bottom: -100%;
    left: 0;
    width: 2px;
    padding: 1px;
    height: 100%;
    background: linear-gradient(360deg, transparent, #aee5ff);
    animation: btn-anim4 1s linear infinite;
    animation-delay: 0.75s;
}

@keyframes btn-anim4 {
    0% {
        bottom: -100%;
    }
    50%,
    100% {
        bottom: 100%;
    }
}

/* btn-2 */

/* <button class="btn-2"> Hover me
</button> */

.btn-2 {
    background-color: var(--blue);
    padding: 14px 40px;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    border-radius: 10px;
    border: 2px dashed var(--blue);
    box-shadow: rgba(50, 50, 93, 0.25) 0px 2px 5px -1px,
        rgba(0, 0, 0, 0.3) 0px 1px 3px -1px;
    transition: 0.4s;
}

.btn-2 span:last-child {
    display: none;
}

.btn-2:hover {
    transition: 0.4s;
    border: 2px dashed var(--blue);
    background-color: #fff;
    color: var(--blue);
}

.btn-2:active {
    background-color: var(--blue-dark);
}

/* btn-3 */
/* <button class="btn-3">Click Me</button> */

/* Button 1 */
.btn-3 {
    background-color: transparent;
    color: white;
    font-weight: bold;
    border-width: 2px;
    border-color: #fff;
    border-radius: 10px;
    transition: all 0.3s;
}

.btn-3:hover {
    transform: translateY(-10px);
    background-color: var(--blue);
}

.btn-3::after {
    transform: translateY(0);
}