styles.css

body {
  background-color: #1e1e1e;
  color           : #c5c8c6;
  font-family     : 'Fira Code', monospace;
  margin          : 0;
  padding         : 0;
}

.container {
  width    : 80%;
  max-width: 800px;
  margin   : 0 auto;
  padding  : 20px;
}

header {
  background-color: #282a36;
  padding         : 40px 0;
  text-align      : center;
  display         : flex;
  align-items     : center;
  justify-content : center;
}

header .profile-picture {
  flex-shrink : 0;
  margin-right: 20px;
}

header .profile-picture img {
  border-radius: 50%;
  width        : 100px;
  height       : 100px;
  object-fit   : cover;
}

header .header-text {
  text-align: left;
}

header h1 {
  color    : #50fa7b;
  font-size: 3rem;
  margin   : 0;
}

header p {
  color    : #f8f8f2;
  font-size: 1.2rem;
  margin   : 10px 0;
}

h2 {
  color        : #50fa7b;
  font-size    : 2rem;
  margin-bottom: 20px;
}

a {
  color          : #8be9fd;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.blog-post {
  margin-bottom: 30px;
}

footer {
  text-align      : center;
  padding         : 20px 0;
  background-color: #282a36;
  color           : #f8f8f2;
}

footer a {
  color          : #8be9fd;
  text-decoration: none;
  margin         : 0 10px;
}

footer a:hover {
  text-decoration: underline;
}

body.night-mode {
  background-color: #121212;
  color           : #e0e0e0;
}

header.night-mode {
  background-color: #333;
}

footer.night-mode {
  background-color: #333;
}

button {
  padding         : 10px 20px;
  font-size       : 1rem;
  color           : #fff;
  background-color: #50fa7b;
  border          : none;
  border-radius   : 5px;
  cursor          : pointer;
  transition      : all 0.3s ease;
  position        : relative;
  overflow        : hidden;
}

button:hover {
  background-color: #8be9fd;
}

button::before {
  content   : '';
  position  : absolute;
  left      : -100%;
  top       : 0;
  width     : 300%;
  height    : 100%;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: all 0.4s ease-in-out;
}

button:hover::before {
  left: 100%;
}

#loading {
  position       : fixed;
  width          : 100%;
  height         : 100%;
  background     : #1e1e1e;
  display        : flex;
  align-items    : center;
  justify-content: center;
  z-index        : 100;
}

.loader {
  border       : 16px solid #f3f3f3;
  border-top   : 16px solid #50fa7b;
  border-radius: 50%;
  width        : 120px;
  height       : 120px;
  animation    : spin 2s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.background {
  position: absolute;
  width   : 100%;
  height  : 100vh;
  overflow: hidden;
  z-index : -1;
}

#stars, #stars2, #stars3 {
  position  : absolute;
  top       : 0;
  left      : 0;
  width     : 100%;
  height    : 100%;
  background: transparent;
  z-index   : -1;
}

#stars {
  background: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/1231630/stars.png') repeat top center;
  opacity   : 0.4;
  animation : stars1 100s linear infinite;
}

#stars2 {
  background: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/1231630/stars.png') repeat top center;
  opacity   : 0.2;
  animation : stars2 50s linear infinite;
}

#stars3 {
  background: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/1231630/stars.png') repeat top center;
  opacity   : 0.1;
  animation : stars3 30s linear infinite;
}

@keyframes stars1 {
  from { background-position: 0 0; }
  to { background-position: 10000px 10000px; }
}

@keyframes stars2 {
  from { background-position: 0 0; }
  to { background-position: 20000px 20000px; }
}

@keyframes stars3 {
  from { background-position: 0 0; }
  to { background-position: 30000px 30000px; }
}