* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  /* max-width: 900px; */
}
body {
  margin: 0;
  background: #eeebe1;
  padding: 0.5rem 1rem;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ------- Header wrapper with 3D look ------- */
.page_header {
  position: fixed;
  top: 0;
  left: auto;
  right: 0;

  z-index: 1000;
  height: 150px;
  width: 100%;
  max-width: 1900px;
  border-radius: 8px;
  padding: 0px 4%;
  background: #ffffff;
  box-shadow: 0 12px 24px rgba(7, 74, 99, 0.12),
    0 8px 16px rgba(7, 74, 99, 0.08), 0 4px 8px rgba(7, 74, 99, 0.05);
  /* background: linear-gradient(90deg, #0066ff, #00d4ff); */
  display: flex;
}

/* Nav */
nav {
  /* বাম পাশের সমস্ত জায়গা দখল করে ডান পাশে সরে আসবে */

  margin-left: auto;
  align-self: center;
}
nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.5rem;
}
nav a {
  position: rlative;
  display: inline-block;
  padding: 0.5rem 0.25rem;

  text-decoration: none;
  color: rgb(0, 0, 0);

  font-size: 0.98rem;

  font-weight: 400;
  transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1), color 180ms;
  transform-style: preserve-3d;
}

/* Link hover -> lift slightly to emphasize 3D */
nav a:hover {
  transform: translateY(-6px) translateZ(6px);
  color: rgb(252, 153, 4);
}

/* Underline -- animated and 3D-ish using multiple layered pseudo elements */
nav a::after,
nav a::before {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  height: 4px;
  border-radius: 9px;
  bottom: -2px;
  transform-origin: center;
  transition: transform 300ms cubic-bezier(0.2, 0.9, 0.2, 1), opacity 220ms;
}
nav a::after {
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 100%);
  transform: scaleX(0.0001) translateZ(6px);
  box-shadow: 0 6px 10px rgba(7, 74, 99, 0.12);
  opacity: 0.95;
}
nav a::before {
  /* faint shadow/extrude below the colored bar */
  background: rgba(4, 43, 51, 0.08);
  height: 6px;
  bottom: -10px;
  filter: blur(6px);
  transform: scaleX(0.0001) translateZ(0);
  opacity: 0.6;
}

/* humberger nav bar */
.humberger {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.humberger span {
  height: 3px;
  width: 25px;
  background: #333;
  margin-bottom: 4px;
  border-radius: 5px;
}

.logo img {
  height: 100%;
  width: auto;
  /* position: absolute;
  top: 50%;
  left: 2%;
transform: translateY(-50%); */
}
/* home page image */
#home {
  margin-top: 100px;
}
.banner {
  position: relative;
  width: 100%;
  height: 400px;
  overflow: hidden;
}

.banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.animated-text {
  text-align: center;
  position: absolute;
  z-index: 2; /* টেক্সট উপরে */
  top: 35%;
  left: 13%;
  color: ;
  font-size: 55px;
  font-family: "Orbitron", sans-serif;
  letter-spacing: 3px;
}

@keyframes gradientMove {
  0% {
    background-position: 0%;
  }
  100% {
    background-position: 300%;
  }
}
.home_img {
  position: relative;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
  max-width: 100%;
  margin-top: 10px;
  border-radius: 8px;
}

.home_img img {
  position: relative;
  width: 100%;
  height: auto;
  border-radius: 8px;
}

@media (max-width: 768px) {
  /* ছোট স্কিনে (বড় স্কিনের nav  মেনু)  ন্যাভ মেনু  হাইড হয়ে যাবে */
  .page_header {
    height: 100px;
  }
  nav ul {
    display: none;
    flex-direction: column;
  }
  /* স্ক্রিন ছোট হলে অটোমেটিক ডিসপ্লে নন থেকে ডিসপ্লে ফ্লেক্স হয়ে দেখা দিবে */

  .humberger {
    display: flex;
  }
  nav ul.show {
    display: flex;
    align-items: center;
    background: #ffffff;
    position: absolute;
    top: 100%;
    right: 0;
    width: 100%;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 0 0 8px 8px;
    padding: 1rem 0;
  }

  .logo img {
    height: 100%;
    width: auto;

    top: 50px;
    left: -40px;
  }

  .animated-text {
    font-size: 12px;
    text-align: center;
    top: 6%;
    left: 23%;
  }
}