:root {
  --yellow: #fcce00;
  --violet: #52134b;
}
* {
  box-sizing: border-box;
}

body {
  font-family: 'Arimo', sans-serif;
  margin: 0;
  transition: transform 0.5s ease-in;
}

button {
  cursor: pointer;
}
button:focus,
input:focus {
  outline: 0;
}

@keyframes show-modal-animation {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/*navbar-------------------------*/
nav {
  background-color: var(--yellow);
  padding: 40px;
  position: fixed;
  z-index: 3;
  height: 100vh;
  top: 0;
  left: 0;
  transform: translateX(-100%); /*tip*/
  transition: box-shadow 1.5s;
}
img {
  border-radius: 50%;
}
nav ul {
  list-style: none;
  text-decoration: none;
  padding: 0;
}
nav ul li {
  margin: 20px 0;
  padding-bottom: 5px;
  border-bottom: solid 1px white;
}
nav ul li a {
  text-decoration: none;
  color: var(--violet);
}

/*main content-------------------------*/
header {
  text-align: center;
  background-color: var(--violet);
  color: white;
  padding: 30px;
  position: relative;
}
header h1 {
  font-size: 45px;
  background: linear-gradient(
    94.23deg,
    #ffca07 36.41%,
    #fff3c7 47.55%,
    #e600f5 65.95%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

#toggle-btn {
  position: absolute;
  left: 30px;
  background-color: transparent;
  border: 0;
  color: white;
}
#toggle-btn:hover {
  color: var(--yellow);
}
#modal-btn,
#login-btn {
  font-size: 18px;
  padding: 10px 20px;
  border: solid 1px var(--yellow);
  border-radius: 5px;
  background-color: var(--yellow);
  color: var(--violet);
  font-weight: 600;
  margin-top: 30px;
}
#modal-btn:hover,
#login-btn:hover {
  background-color: white;
  border-color: var(--violet);
}

.container {
  padding: 40px;
  margin: 0 auto;
  width: 800px;
  max-width: 90%;
}
h2 {
  color: var(--violet);
  margin-top: 40px;
}

.container ul {
  color: var(--violet);
  margin-bottom: 30px;
}

/*main content-------------------------*/
.modal-container {
  position: fixed;
  top: 0; /*tip*/
  left: 0; /*tip*/
  bottom: 0; /*tip*/
  right: 0; /*tip*/
  background-color: rgba(0, 0, 0, 0.4);
  display: none;
}
.modal-container.show-modal {
  display: block;
}
.modal-container.show-modal #modal {
  animation: show-modal-animation 1s;
}

#modal {
  border-radius: 10px;
  width: 400px;
  max-width: 97%;
  position: absolute;
  overflow: hidden;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: white;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.342);
}

.modal-header {
  background-color: var(--violet);
  color: white;
  text-align: center;
  position: relative;
  padding: 3px 0;
  border-top-right-radius: 10px;
  border-top-left-radius: 10px;
}

#close-btn {
  position: absolute;
  right: 20px;
  top: 20px;
  background-color: transparent;
  color: var(--yellow);
  border: 0;
  font-size: 20px;
}

.modal-content {
  padding: 30px 50px;
}

.modal-content p {
  text-align: center;
}
form div {
  margin: 15px auto;
  width: 100%;
}

form label {
  display: block;
  margin-bottom: 3px;
  color: var(--violet);
}

form input:not([type='submit']) {
  box-sizing: border-box;
  padding: 10px;
  width: 100%;
  border-radius: 5px;
  border: solid 1px var(--violet);
}

#login-btn {
  cursor: pointer;
}

/*when nav is displayed-------------------------*/
/*----------------------------------------------*/
body.show-nav {
  transform: translateX(208px);
}

body.show-nav nav {
  box-shadow: 0 0 15px var(--violet);
  transition: box-shadow 1s;
}