/* ===============================
   RESET DASAR
   =============================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Arial, sans-serif;
}

body {
  background: #f4f7fb;
  color: #333;
  line-height: 1.8;
}

/* ===============================
   NAVBAR
   =============================== */
nav {
  background: #0a4d8c;
  padding: 14px 30px;
  display: flex;
  gap: 20px;
}

nav a {
  color: #ffffff;
  text-decoration: none;
  font-weight: 500;
}

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

/* ===============================
   AREA KONTEN
   =============================== */
.content {
  max-width: 1000px;
  margin: 90px auto 70px;
  padding: 0 25px;
}

/* ===============================
   JUDUL UTAMA
   =============================== */
.content h2 {
  background: linear-gradient(135deg, #0a4d8c, #1366b8);
  color: #ffffff;
  text-align: center;
  font-size: 34px;
  padding: 30px 20px;
  margin-bottom: 50px;
  border-radius: 10px;
}

/* ===============================
   SUB JUDUL (STUDI KASUS & MANFAAT)
   =============================== */
.content h1 {
  font-size: 26px;
  color: #083a69;
  margin: 45px 0 14px;
  padding-left: 18px;
  position: relative;
}

/* Garis penegas kiri */
.content h1::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 6px;
  height: 75%;
  background: #0a4d8c;
  border-radius: 4px;
}

/* ===============================
   PARAGRAF
   =============================== */
.content p {
  margin-bottom: 18px;
  text-align: justify;
}

/* ===============================
   BLOK PERBANDINGAN
   =============================== */
.compare-box {
  background: #eef4fb;
  border-left: 6px solid #0a4d8c;
  padding: 22px 26px;
  margin: 30px 0;
  border-radius: 6px;
}

.compare-box strong {
  display: block;
  color: #0a4d8c;
  margin-bottom: 10px;
}

/* ===============================
   LIST
   =============================== */
.compare-box ul {
  margin-left: 25px;
}

.compare-box ul li {
  margin-bottom: 8px;
}

/* ===============================
   GAMBAR SCROLL
   =============================== */
.scroll-img {
  max-height: 340px;
  overflow-y: auto;
  border: 2px solid #0a4d8c;
  border-radius: 6px;
  margin: 40px 0;
}

.scroll-img img {
  width: 100%;
  display: block;
}

/* ===============================
   NAVIGASI HALAMAN
   =============================== */
.page-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 55px;
}

/* Tombol kembali */
.btn-back {
  background: #ffffff;
  color: #0a4d8c;
  border: 2px solid #0a4d8c;
  padding: 10px 26px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
}

.btn-back:hover {
  background: #0a4d8c;
  color: #ffffff;
  transform: translateX(-4px);
}

/* Tombol lanjut */
.btn-next {
  background: linear-gradient(135deg, #0a4d8c, #1366b8);
  color: #ffffff;
  padding: 11px 30px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
}

.btn-next:hover {
  transform: translateX(4px);
  box-shadow: 0 6px 16px rgba(10, 77, 140, 0.3);
}

/* ===============================
   RESPONSIVE
   =============================== */
@media (max-width: 600px) {
  nav {
    flex-wrap: wrap;
  }

  .content h2 {
    font-size: 28px;
    padding: 22px 15px;
  }

  .content h1 {
    font-size: 22px;
  }
}