/* --- Expertise Section Layout --- */
.expertise {
  width: 100%;
  min-height: 100vh;
  position: relative;
  background-color: #0a0d1f;
  padding: 100px 8%;
  overflow: hidden;
  text-align: center; /* হেডিং এবং নিচের বাটন সেন্টার করার জন্য */
}

/* Background Glow Effect */
.expertise::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(
    circle,
    rgba(0, 255, 255, 0.15) 0%,
    rgba(0, 255, 255, 0) 70%
  );
  z-index: 1;
  pointer-events: none;
}

.expertise h2 {
  position: relative;
  z-index: 2;
  color: #fff;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 60px;
}

.expertise h2 span {
  color: #00c2f7;
}

/* --- Grid Container --- */
.expertise-card-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 35px;
  max-width: 1200px;
  margin: 0 auto 50px auto; /* কার্ডের নিচে গ্যাপ রাখা হলো যাতে বাটনটা দূরে থাকে */
  position: relative;
  z-index: 2;
}

/* --- The Animated Card --- */
.expertise-card {
  position: relative;
  padding: 50px 40px;
  border-radius: 20px;
  background: #0d102a;
  overflow: hidden;
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: flex;
  flex-direction: column;
  align-items: flex-start; /* কার্ডের ভেতর কন্টেন্ট বাম দিকে থাকবে */
  text-align: left;
  border: 2px solid transparent;
}

/* Rotating Border Effect (Conic) */
.expertise-card::after {
  content: "";
  position: absolute;
  inset: -150%;
  background: conic-gradient(
    from 0deg,
    transparent 0%,
    transparent 40%,
    #01f0ff 50%,
    #fff 55%,
    #01f0ff 60%,
    transparent 70%,
    transparent 100%
  );
  animation: rotateBorder 4s linear infinite;
  z-index: 0;
  transition: opacity 0.3s ease;
}

/* Inner Background Cover */
.expertise-card::before {
  content: "";
  position: absolute;
  inset: 3px;
  background: #0d112d;
  border-radius: 17px;
  z-index: 1;
  transition:
    opacity 0.3s ease,
    inset 0.3s ease;
}

/* Hover Logic */
.expertise-card:hover {
  transform: translateY(-10px);
  border-color: #01f0ff;
  box-shadow: 0 0 25px rgba(1, 240, 255, 0.4);
}

.expertise-card:hover::after {
  opacity: 0;
  animation-play-state: paused;
}

.expertise-card:hover::before {
  inset: 0;
}

/* --- Content Styling --- */
.expertise-icon,
.expertise-card h3,
.expertise-card p {
  position: relative;
  z-index: 5;
}

.expertise-icon {
  width: 60px;
  height: 60px;
  background: #01f0ff;
  color: #000;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 12px;
  font-size: 1.8rem;
  margin-bottom: 25px;
  transition: 0.3s;
}

.expertise-card:hover .expertise-icon {
  transform: scale(1.1) rotate(-8deg);
  background: #fff;
}

.expertise-card h3 {
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.expertise-card p {
  color: #8892b0;
  font-size: 1rem;
  line-height: 1.6;
}

/* --- THE MAIN BUTTON (Centered) --- */
/* কার্ডের বাইরের বাটনকে টার্গেট করা হলো */
.expertise > .expertise-btn {
  position: relative;
  z-index: 10;
  margin: 20px auto 0 auto; /* auto ব্যবহার করে মাঝখানে আনা হলো */
  background: linear-gradient(135deg, rgba(1, 240, 255, 0.1), transparent);
  color: #fff;
  border: 2px solid #01f0ff;
  padding: 15px 40px;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex; /* সেন্টার করার জন্য জরুরি */
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all 0.3s ease;
  box-shadow: 0 0 15px rgba(1, 240, 255, 0.2);
}

.expertise > .expertise-btn:hover {
  background: #01f0ff;
  color: #000;
  transform: scale(1.05);
  box-shadow: 0 0 30px rgba(1, 240, 255, 0.5);
}

/* --- Animation Keyframes --- */
@keyframes rotateBorder {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* --- Responsive Layout --- */
@media (max-width: 900px) {
  .expertise-card-container {
    grid-template-columns: 1fr;
    max-width: 550px;
  }
}

@media (max-width: 480px) {
  .expertise > .expertise-btn {
    width: 90%; /* মোবাইলে একটু চওড়া */
    padding: 12px 25px;
  }
}