body { margin:0; font-family:Arial; background:#fff; color:rgb(0, 0, 0); overflow-x:hidden; }
header { display:flex; justify-content:space-between; padding:20px 50px; background:#07152a; }
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
    background: #0a0f1c; /* Dark premium background */
    position: sticky;
    top: 0;
    z-index: 1000;
}

/* LOGO SECTION */
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 8px;
}

/* LOGO TEXT */
.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: white;
    letter-spacing: 1px;
}

.logo-text .mark {
    color: #00aaff; /* Blue color for MARK */
}

/* NAV LINKS */
nav a {
    color: white;
    text-decoration: none;
    font-size: 15px;
    margin-left: 30px;
    transition: 0.3s;
}

nav a:hover {
    color: #00aaff;
}
.back-arrow {
  position: absolute;
  top: 20px;
  left: 20px;
}

.back-arrow a {
  margin-top: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: #007BFF;
  color: #fff;
  border-radius: 50%;
  text-decoration: none;
  font-size: 20px;
  transition: 0.3s ease;
}

.back-arrow a:hover {
  background: #0056b3;
}

.stationery-items{
  padding: 80px 20px;
  background: #f8fbff;
  text-align: center;
}

.it-hardware h2 {
  font-size: 36px;
  margin-bottom: 10px;
  color: #0a2540;
}

.subtitle {
  color: #555;
  margin-bottom: 50px;
}

/* GRID */
.hardware-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
}

/* CARD */
.card {
  background: #fff;
  padding: 25px;
  border-radius: 12px;
  text-align: left;
  transition: 0.3s;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  position: relative;
}

.card i {
  font-size: 28px;
  color: #1da1f2;
  margin-bottom: 15px;
}

.card h3 {
  margin-bottom: 10px;
  color: #0a2540;
}

.card ul {
  padding-left: 18px;
}

.card ul li {
  font-size: 14px;
  margin-bottom: 6px;
  color: #444;
}

/* HOVER EFFECT */
.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 10px 30px rgba(29,161,242,0.2);
}

/* BUTTON */
.quote-btn {
  margin-top: 50px;
}

.btn {
  display: inline-block;
  padding: 14px 35px;
  background: linear-gradient(135deg, #1da1f2, #0a2540);
  color: #fff;
  border-radius: 30px;
  text-decoration: none;
  transition: 0.3s;
}

.btn:hover {
  opacity: 0.9;
  transform: scale(1.05);
}

/* ===== COMPREHENSIVE RESPONSIVE DESIGN ===== */

/* Mobile Menu Toggle Button */
.menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 6px;
  background: none;
  border: none;
  color: white;
  font-size: 24px;
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: white;
  transition: 0.3s;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(10px, 10px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== TABLET (768px and below) ===== */
@media (max-width: 768px) {
  /* Navbar */
  .navbar {
    padding: 15px 20px;
  }

  .logo img {
    width: 40px;
    height: 40px;
  }

  .logo-text {
    font-size: 16px;
  }

  .menu-toggle {
    display: flex;
  }

  .back-arrow a {
    width: 35px;
    height: 35px;
    font-size: 16px;
  }

  nav {
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: #0a0f1c;
    flex-direction: column;
    padding: 20px;
    display: none;
    z-index: 999;
  }

  nav.active {
    display: flex;
  }

  nav a {
    padding: 15px;
    margin: 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }

  /* Stationery Items Section */
  .stationery-items {
    padding: 50px 5%;
  }

  .it-hardware h2 {
    font-size: 28px;
  }

  .subtitle {
    font-size: 16px;
  }

  /* Grid */
  .hardware-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* Card */
  .card {
    padding: 20px;
    border-radius: 12px;
  }

  .card i {
    font-size: 24px;
  }

  .card h3 {
    font-size: 1.1rem;
  }

  .card ul li {
    font-size: 13px;
  }

  /* Button */
  .btn {
    padding: 12px 25px;
    font-size: 14px;
  }
}

/* ===== MOBILE (480px and below) ===== */
@media (max-width: 480px) {
  /* Navbar */
  .navbar {
    padding: 12px 15px;
  }

  .logo {
    gap: 8px;
  }

  .logo img {
    width: 35px;
    height: 35px;
  }

  .logo-text {
    font-size: 14px;
  }

  .menu-toggle span {
    width: 20px;
    height: 2.5px;
  }

  .back-arrow a {
    width: 32px;
    height: 32px;
    font-size: 14px;
    margin-top: 60px;
  }

  /* Stationery Items Section */
  .stationery-items {
    padding: 30px 5%;
  }

  .it-hardware h2 {
    font-size: 20px;
  }

  .subtitle {
    font-size: 14px;
    margin-bottom: 30px;
  }

  /* Grid */
  .hardware-grid {
    gap: 15px;
  }

  /* Card */
  .card {
    padding: 15px;
  }

  .card i {
    font-size: 22px;
  }

  .card h3 {
    font-size: 1rem;
  }

  .card ul li {
    font-size: 12px;
    margin-bottom: 5px;
  }

  /* Button */
  .quote-btn {
    margin-top: 30px;
  }

  .btn {
    padding: 10px 20px;
    font-size: 12px;
  }
}

/* ===== EXTRA SMALL (under 360px) ===== */
@media (max-width: 360px) {
  .navbar {
    padding: 10px 12px;
  }

  .logo-text {
    font-size: 12px;
  }

  .back-arrow a {
    width: 30px;
    height: 30px;
    font-size: 12px;
  }

  /* Stationery Items Section */
  .stationery-items {
    padding: 20px 5%;
  }

  .it-hardware h2 {
    font-size: 18px;
  }

  .subtitle {
    font-size: 12px;
  }

  /* Grid */
  .hardware-grid {
    gap: 12px;
  }

  /* Card */
  .card {
    padding: 12px;
  }

  .card i {
    font-size: 20px;
  }

  .card h3 {
    font-size: 0.9rem;
  }

  .card ul li {
    font-size: 11px;
  }

  .btn {
    padding: 8px 15px;
    font-size: 11px;
  }
}