/* ---------- Base Button Style ---------- */
.btn {
  display: inline-block;
  text-decoration: none;
  text-align: center;
  padding: 14px 20px;
  border-radius: 12px;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  font-weight: 800; /* All bold */
  letter-spacing: .35px;
  line-height: 1.2;
  margin: 8px;
  transition: all .25s ease-in-out;
  position: relative;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-transform: uppercase;
}

/* ---------- LINK ALTERNATIF ---------- */
.btn-alt {
  background: linear-gradient(180deg, #4d9be6 0%, #347bc1 60%, #2a5d91 100%);
  color: #ffffff; /* pure white text for max contrast */
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow:
    0 5px 18px rgba(50, 120, 200, 0.4),
    inset 0 0 0 1px rgba(0, 0, 0, 0.25),
    inset 0 -2px 0 rgba(0, 0, 0, 0.35);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.75); /* strong readability */
}

.btn-alt:hover {
  background: linear-gradient(180deg, #63afff 0%, #3e8cd9 70%, #2f69a5 100%);
  transform: translateY(-2px);
  box-shadow:
    0 7px 22px rgba(70, 150, 240, 0.55),
    inset 0 0 0 1px rgba(0, 0, 0, 0.3),
    inset 0 -2px 0 rgba(0, 0, 0, 0.4);
}

.btn-alt::after {
  content: "";
  position: absolute;
  top: 0;
  left: -150%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    120deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.5) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: skewX(-20deg);
  animation: sheenMove 6s ease-in-out infinite;
}

/* ---------- KONTAK ---------- */
.btn-kontak {
  background: linear-gradient(180deg, #d22d00 0%, #8c0000 85%);
  color: #fffbea;
  text-transform: uppercase;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow:
    0 4px 14px rgba(200, 40, 0, 0.45),
    inset 0 0 0 1px rgba(0, 0, 0, 0.4),
    inset 0 -2px 0 rgba(0, 0, 0, 0.55);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.85);
  animation: glowPulse 3s ease-in-out infinite;
}

.btn-kontak:hover {
  background: linear-gradient(180deg, #e63c00 0%, #990000 85%);
  box-shadow:
    0 6px 24px rgba(255, 60, 0, 0.6),
    inset 0 0 0 1px rgba(0, 0, 0, 0.45),
    inset 0 -2px 0 rgba(0, 0, 0, 0.6);
  transform: scale(1.05);
}

.btn-kontak::after {
  content: "";
  position: absolute;
  top: 0;
  left: -150%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    120deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.35) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: skewX(-20deg);
  animation: sheenMove 6s ease-in-out infinite;
}

/* ---------- Animations ---------- */
@keyframes glowPulse {
  0%   { box-shadow: 0 4px 14px rgba(255,0,0,.4), inset 0 -2px 0 rgba(0,0,0,.55); }
  50%  { box-shadow: 0 6px 22px rgba(255,100,0,.75), inset 0 -2px 0 rgba(0,0,0,.55); }
  100% { box-shadow: 0 4px 14px rgba(255,0,0,.4), inset 0 -2px 0 rgba(0,0,0,.55); }
}

@keyframes sheenMove {
  0% { left: -150%; }
  50% { left: 150%; }
  100% { left: 150%; }
}

/* ---------- Mobile ---------- */
@media (max-width: 600px) {
  .btn {
    display: block;
    width: 92%;
    margin: 10px auto;
    font-size: 17px;
    font-weight: 800;
  }
}