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

/* =========================
   BACKGROUND BLUR
========================= */
body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: url("assets/bg.jpg") no-repeat center center fixed;
  background-size: cover;
  filter: blur(6px);
  transform: scale(1.08);
  z-index: -2;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: -1;
}

/* =========================
   CONTAINER
========================= */
.phone {
  max-width: 420px;
  margin: 0 auto;
  color: #fff;
}

/* =========================
   HEADER
========================= */
.header {
  text-align: center;
  padding: 20px 10px;
}

.logo {
  max-width: 150px;
}

.subtitle {
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 2px;
  color: #ccc;
}

/* =========================
   OFFICIAL WEBSITE BUTTON
========================= */
.silver-top {
  padding: 10px;
}

.official-btn {
  width: 100%;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  text-decoration: none;

  background: linear-gradient(
    120deg,
    #1e90ff,
    #00e5ff,
    #7b3fe4
  );
  background-size: 300% 300%;
  animation: wave 6s ease-in-out infinite;

  box-shadow:
    0 0 12px rgba(0,191,255,0.8),
    0 0 28px rgba(123,63,228,0.7);

  transition: transform .25s ease, box-shadow .25s ease;
}

.official-text {
  max-width: 72%;
  height: auto;
  pointer-events: none;
}

/* =========================
   BANNER + NEON PUTIH GELEMBUNG
========================= */
.banner {
  padding: 10px;
}

.banner-neon {
  position: relative;
  border-radius: 18px;
}

.banner-neon img {
  width: 100%;
  border-radius: 18px;
  display: block;
  position: relative;
  z-index: 3;
}

/* GELEMBUNG PUTIH */
.banner-neon::before {
  content: "";
  position: absolute;
  inset: -20px;
  border-radius: 30px;
  z-index: 1;

  background:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.6), transparent 60%),
    radial-gradient(circle at 80% 40%, rgba(255,255,255,0.5), transparent 65%),
    radial-gradient(circle at 50% 80%, rgba(255,255,255,0.4), transparent 70%);

  filter: blur(30px);
  opacity: 0.9;
  animation: bubbleGlow 4s ease-in-out infinite;
}

/* HALO LUAR */
.banner-neon::after {
  content: "";
  position: absolute;
  inset: -34px;
  border-radius: 40px;
  z-index: 0;
  background: rgba(255,255,255,0.35);
  filter: blur(55px);
  opacity: 0.6;
}

/* =========================
   GRID BUTTONS
========================= */
.silver-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 10px;
}

.silver-box {
  height: 72px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;

  background: linear-gradient(
    120deg,
    #1e90ff,
    #00e5ff,
    #7b3fe4,
    #1e90ff
  );
  background-size: 400% 400%;
  animation: wave 6s ease infinite;

  box-shadow:
    0 0 18px rgba(0,191,255,0.9),
    0 0 42px rgba(123,63,228,0.8);

  transition: transform .25s ease, box-shadow .25s ease;
}

.silver-box.span {
  grid-column: span 2;
}

.silver-box img {
  max-width: 78%;
  height: auto;
  pointer-events: none;
}

/* =========================
   HOVER
========================= */
.silver-box:hover,
.official-btn:hover {
  transform: scale(1.05);
  box-shadow:
    0 0 30px rgba(0,191,255,1),
    0 0 60px rgba(123,63,228,1);
}

/* =========================
   FOOTER
========================= */
.footer {
  text-align: center;
  font-size: 11px;
  color: #ccc;
  padding: 18px 0;
}

/* =========================
   ANIMATIONS
========================= */
@keyframes wave {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes bubbleGlow {
  0%   { opacity: 0.6; transform: scale(1); }
  50%  { opacity: 1;   transform: scale(1.04); }
  100% { opacity: 0.6; transform: scale(1); }
}