/* ==== BASIC RESET ==== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* ==== BODY & BACKGROUND ==== */
body {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 40px 20px;
  z-index: 1;

  /* ব্যাকগ্রাউন্ড অ্যানিমেশন */
  background: linear-gradient(270deg, #000000, #ffffff, #000000);
  background-size: 600% 600%;
  animation: gradientShift 20s ease infinite;
  overflow: hidden;
}

/* গ্রেডিয়েন্ট শিফট অ্যানিমেশন */
@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}
main {
  max-width: 1200px;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); /* আগের 380px বদলে 250px */
  gap: 20px; /* gap ছোট করলাম */
}

.card {
  padding: 20px; /* ছোট স্ক্রিনে padding কম */
}

/* ==== ছোট স্ক্রিনের জন্য মিডিয়া কুয়েরি ==== */
@media (max-width: 480px) {
  header h1 {
    font-size: 2.2rem;
  }
  header p {
    font-size: 1.2rem;
  }
  .card h2 {
    font-size: 1.4rem;
  }
  .info {
    font-size: 1rem;
  }
  .link-btn {
    font-size: 1rem;
    padding: 12px 16px;
  }
}

/* ==== লাইট স্পট যা মাউস অনুসরণ করবে ==== */
body::before {
  content: '';
  position: fixed;
  top: var(--mouseY, 50%);
  left: var(--mouseX, 50%);
  transform: translate(-50%, -50%);
  width: 300px;
  height: 300px;
  pointer-events: none;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 80%);
  mix-blend-mode: screen;
  transition: top 0.1s ease, left 0.1s ease;
}

/* ==== HEADER ==== */
header {
  text-align: center;
  margin-bottom: 50px;
  transform: perspective(1000px) rotateX(5deg);
}
header h1 {
  font-size: 4rem;
  color: #f8f9fa;
  margin-bottom: 12px;
  letter-spacing: 2px;
  text-shadow: 4px 4px 12px rgba(0, 0, 0, 0.6);
}
header p {
  font-size: 1.6rem;
  color: #ddd;
  font-weight: 500;
}

/* ==== MAIN GRID ==== */
main {
  max-width: 1200px;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 40px;
}

/* ==== CARD STYLE ==== */
.card {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 24px;
  box-shadow: 10px 10px 25px rgba(0, 0, 0, 0.3),
    -10px -10px 25px rgba(255, 255, 255, 0.1);
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
  transform-style: preserve-3d;
  backdrop-filter: blur(10px);
}
.card:hover {
  transform: translateY(-14px) scale(1.07) rotateX(5deg) rotateY(3deg);
  box-shadow: 20px 20px 40px rgba(0, 0, 0, 0.4),
    -10px -10px 25px rgba(255, 255, 255, 0.2);
}

/* ==== RESOURCE NAME ==== */
.card h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  color: #fff;
  font-weight: bold;
  line-height: 1.3;
}

/* ==== INFO / CREDIT ==== */
.info {
  font-size: 1.4rem;
  color: #f0f0f0;
  margin-bottom: 28px;
  line-height: 1.8;
}

/* ==== BUTTON ==== */
.link-btn {
  text-decoration: none;
  background: linear-gradient(135deg, #007bff, #0056b3);
  color: white;
  padding: 20px 26px;
  border-radius: 14px;
  font-weight: 700;
  font-size: 1.4rem;
  text-align: center;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
  transform: perspective(500px) translateZ(10px);
}
.link-btn:hover {
  background: linear-gradient(135deg, #0056b3, #004099);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
  transform: perspective(500px) translateZ(20px) scale(1.08);
}

/* ==== FOOTER ==== */
footer {
  margin-top: 70px;
  font-size: 1rem;
  color: #ccc;
  text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
}
/* কার্ডের টাইটেল ও ইনফো টেক্সট ফন্ট আপডেট */
.card h2 {
  font-family: 'Roboto', 'Roboto Black', 'Roboto Bold', sans-serif;
  font-weight: 900;
  font-size: 2.8rem;
  margin-bottom: 20px;
  color: #222222; /* কালো টেক্সটের হালকা শেড */
  text-shadow: 0 0 8px rgba(0, 0, 0, 0.6); /* কালো গ্লো */
  line-height: 1.3;
}

.card .info {
  font-family: 'Roboto', 'Roboto Medium', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  color: #333333; /* একটু হালকা কালো */
  text-shadow: 0 0 6px rgba(0, 0, 0, 0.4); /* হালকা কালো গ্লো */
  margin-bottom: 28px;
  line-height: 1.8;
}
html, body {
  height: auto;
  min-height: 100vh;
  overflow-x: hidden;
  overflow-y: auto;
}