/* Reset dasar */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background: linear-gradient(135deg, #74ebd5, #9face6);
  color: #222;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px;
  transition: background 0.5s, color 0.5s;
}

header {
  text-align: center;
  margin-bottom: 30px;
}

.highlight {
  color: #ff6f61;
  font-weight: 700;
}

.subtitle {
  font-style: italic;
  margin-top: 5px;
  color: #444;
}

section {
  background: rgba(255, 255, 255, 0.85);
  padding: 15px 25px;
  margin-bottom: 25px;
  border-radius: 12px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

h2 {
  margin-bottom: 12px;
  color: #3b3b98;
  border-bottom: 2px solid #ff6f61;
  padding-bottom: 6px;
}

ul {
  list-style: inside square;
  line-height: 1.6;
}

button#btnToggleTheme {
  cursor: pointer;
  padding: 12px 20px;
  background-color: #ff6f61;
  border: none;
  border-radius: 30px;
  color: white;
  font-weight: 600;
  box-shadow: 0 5px 10px #e5534b;
  transition: background-color 0.3s ease;
  align-self: center;
  margin-bottom: 30px;
}

button#btnToggleTheme:hover {
  background-color: #e5534b;
}

footer {
  text-align: center;
  color: #555;
  font-size: 14px;
}

/* Tema gelap */
body.dark-theme {
  background: linear-gradient(135deg, #2c3e50, #4ca1af);
  color: #ddd;
}

body.dark-theme section {
  background: rgba(44, 62, 80, 0.85);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

body.dark-theme h2 {
  color: #e67e22;
  border-color: #e67e22;
}

body.dark-theme .highlight {
  color: #e67e22;
}

body.dark-theme .subtitle {
  color: #ccc;
}

body.dark-theme footer {
  color: #bbb;
}