body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: #0d1b2a; /* Navy gelap */
  color: white;
  padding-bottom: 100px;
  overflow-x: hidden;
}

/* HEADER */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 55px;
  background: rgba(27, 38, 59, 0.85); /* Navy transparan */
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 15px;
  z-index: 999;
  backdrop-filter: blur(6px);
  animation: flashHeader 2s infinite;
  transition: background-color 0.3s ease-in-out;
}

.menu-btn, .riwayat-btn {
  font-size: 22px;
  color: #ffffff;
  cursor: pointer;
}

.app-title {
  font-size: 16px;
  font-weight: 600;
  color: #4ea8de; /* Biru terang */
}

.content {
  padding: 70px 15px 0;
  text-align: center;
}

.hero-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
}

.highlight {
  color: #8b5cf6;
}

.subtext {
  font-size: 14px;
  color: #cbd5e1; /* abu kebiruan */
  margin-bottom: 20px;
}

.section-title {
  margin: 20px 0 10px;
  font-weight: 600;
  font-size: 16px;
}

.card-container {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.card {
  background: #1b263b;
  border-radius: 12px;
  padding: 15px;
  width: 30%;
  text-align: center;
  flex: 1 1 30%;
  min-width: 90px;
}

.card img {
  width: 30px;
  height: 30px;
  margin-bottom: 5px;
}

.card span {
  display: block;
  font-size: 13px;
  margin-top: 4px;
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  width: 100%;
  background: #1b263b;
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 6px 0;
  border-top: 1px solid #415a77;
  z-index: 998;
}

.bottom-nav a {
  color: #94a3b8;
  text-decoration: none;
  text-align: center;
  font-size: 12px;
  flex: 1;
}

.bottom-nav a.active {
  color: #4ea8de;
}

.bottom-nav img {
  width: 22px;
  height: 22px;
  display: block;
  margin: 0 auto 2px;
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: -250px;
  width: 220px;
  height: 100%;
  background-color: #1b263b;
  z-index: 1000;
  padding-top: 60px;
  transition: left 0.3s ease;
}

.sidebar.show {
  left: 0;
}

.sidebar a {
  display: block;
  padding: 12px 20px;
  color: white;
  text-decoration: none;
  border-bottom: 1px solid #415a77;
}

.sidebar a:hover {
  background: #2d3f59;
}

/* Responsive */
@media (max-width: 600px) {
  .hero-title {
    font-size: 20px;
  }

  .card {
    width: 45%;
  }
}

.close-btn {
  position: absolute;
  top: 12px;
  right: 15px;
  font-size: 22px;
  color: #ffffff;
  cursor: pointer;
}

/* Animasi kilat navy */
@keyframes flashHeader {
  0% { background-color: #415a77; }
  50% { background-color: #778da9; }
  100% { background-color: #415a77; }
}

/**/