.promo-btn {
    position: fixed;
    bottom: 377px;
    right: 0px;
    width: 111px;
    height: 40px;
    background: linear-gradient(135deg, #ff0000, #b50000);
    color: #fff;
    border-radius: 25px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    font-size: 13px;
    cursor: grab;
    z-index: 11001;
    box-shadow: 0 10px 25px rgba(0,0,0,0.4);
    user-select: none;
    transition: transform 0.3s ease;
    overflow: hidden;
    }
    

@keyframes pulse {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.15); } / membesar 15% /
  100% { transform: scale(1); }

  }
  
.promo-btn span {
  font-weight: bold;
  font-size: 13px;
  background: linear-gradient(90deg, #fff, #fffe, #ff0000);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  user-select: none;
}
.letter {
  display: inline-block;
  animation: zoomLetter 1s ease-in-out infinite;
}

/ Animasi zoom bergantian /
.letter:nth-child(1) { animation-delay: 0s; }
.letter:nth-child(2) { animation-delay: 0.2s; }
.letter:nth-child(3) { animation-delay: 0.4s; }
.letter:nth-child(4) { animation-delay: 0.6s; }
.letter:nth-child(5) { animation-delay: 0.8s; }

@keyframes zoomLetter {
  0%   { transform: scale(1); opacity: 1; }
  50%  { transform: scale(1.5); opacity: 0.9; }
  100% { transform: scale(1); opacity: 1; }
}
.promo-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -150%;
  width: 150%;
  height: 100%;
  background: linear-gradient(
    120deg,
    transparent,
    rgba(255,255,255,0.6),
    transparent
  );
  animation: shineBox 2.5s infinite;
}

@keyframes shineBox {
  0%   { left: -150%; }
  100% { left: 150%; }
}
  .promo-btn:active {
    cursor: grabbing;
    transform: scale(1.1);
  }

  .promo-info {
    position: fixed;
    bottom: 88px;
    right: 80px;
    width: 250px;
    padding: 20px;
    background: rgba(255,255,255,0.9);
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    display: none;
    z-index: 11000;
  }

  .promo-info h4 {
    margin: 0 0 10px;
    color: #d32f2f;
    font-weight: 500px;
  }

  .close-info {
    display: block;
    margin-top: 10px;
    text-align: right;
    cursor: pointer;
    color: #333;
    font-size: 14px;
  }
  .fa {
  margin-right: 8px; /* jarak icon ke teks */
  font-size: 20px;   /* ukuran icon */
  color: white;      /* warna icon */
}
/* Accordion spesifikasi */
.accordion-btn {
  position: relative;
  display: block;
  width: 100%;
  padding: 10px 14px;
  margin: 8px 0;
  background: linear-gradient(135deg, #0066cc, #0099ff);
  color: #fff;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  overflow: hidden; /* penting untuk efek shine */
}

.accordion-btn::after {
  content: "";
  position: absolute;
  top: 0;
  left: -75%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    120deg,
    rgba(255,255,255,0.1) 0%,
    rgba(255,255,255,0.6) 50%,
    rgba(255,255,255,0.1) 100%
  );
  transform: skewX(-25deg);
  animation: shine 2s infinite; /* looping otomatis */
}

@keyframes shine {
  0% { left: -75%; }
  100% { left: 125%; }
}
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
}
.spec-table th {
  background: #0066cc;
  color: #fff;
  padding: 8px;
  text-align: left;
}
.spec-table td {
  padding: 6px 10px;
  border-bottom: 1px solid #ddd;
  font-size: 14px;
}
.accordion-btn::before {
  font-family: FontAwesome;
  content: "\f0d7"; /* kode unicode fa-caret-down */
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  transition: transform 0.3s ease;
}

.accordion-btn.active::before {
  transform: translateY(-50%) rotate(180deg);
}