/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: #2b2b2b; /* abu-abu gelap */
  font-family: Arial, sans-serif;
  transition: opacity 1s ease; /* untuk efek fade */
}

.container {
  text-align: center;
}

/* Teks Hello */
h1 {
  font-size: 12vw;
  font-weight: bold;
  background: linear-gradient(90deg, red, blue);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-color: white;
  padding: 10px 20px;
  border-radius: 12px;
  display: inline-block;
  margin-bottom: 40px;
}

/* Loader keren */
.loader {
  width: 80px;
  height: 80px;
  border: 10px solid rgb(255, 255, 255);
  border-top: 10px solid red;
  border-right: 10px solid blue;
  border-radius: 50%;
  animation: spin 1.2s linear infinite, glow 2s ease-in-out infinite alternate;
  margin: 0 auto;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes glow {
  from { box-shadow: 0 0 10px red, 0 0 20px blue; }
  to   { box-shadow: 0 0 20px blue, 0 0 40px red; }
}

/* Responsive tweaks */

/* Tablet */
@media (max-width: 1024px) {
  h1 {
    font-size: 14vw;
  }
  .loader {
    width: 70px;
    height: 70px;
    border-width: 8px;
  }
}

/* HP */
@media (max-width: 600px) {
  h1 {
    font-size: 18vw;
  }
  .loader {
    width: 60px;
    height: 60px;
    border-width: 6px;
  }
}