body {
  background-color: #f8f9fa;
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
}

/* HEADER-KONTEN */
main .container {
  padding-top: 2rem;
  padding-bottom: 2rem;
}

/* JUDUL HALAMAN */
h3.text-center {
  font-weight: 700;
  font-size: 1.6rem;
  color: #222;
  margin-bottom: 0.5rem;
}

p.text-muted {
  font-size: 0.95rem;
}

/* FILE PREVIEW - PDF & OFFICE */
.pdf-frame,
.office-frame {
  width: 100%;
  height: 600px;
  border: 1px solid #ccc;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

/* FILE BOX (icon) */
.file-box {
  background-color: #ffffff;
  border: 1px solid #ddd;
  padding: 30px 20px;
  border-radius: 12px;
  text-align: center;
  display: inline-block;
  min-width: 240px;
  max-width: 100%;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.file-box i {
  font-size: 3rem;
  margin-bottom: 10px;
  color: #6c757d;
}

.file-box .label {
  font-weight: 600;
  color: #333;
  font-size: 1rem;
}

/* TOMBOL UNDUH */
a.btn-outline-primary {
  font-weight: 500;
  font-size: 0.95rem;
  margin-top: 12px;
}

/* RESPONSIF MOBILE */
@media (max-width: 768px) {
  .pdf-frame,
  .office-frame {
    height: 400px;
  }

  .file-box {
    width: 100%;
    padding: 20px 15px;
  }

  .file-box i {
    font-size: 2.5rem;
  }

  .file-box .label {
    font-size: 0.95rem;
  }

  .btn {
    width: 100%;
    font-size: 0.95rem;
  }
}

/* Sticky bar default off jika belum aktif */
#stickyBottom:not(.show) {
  display: none;
}