* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Poppins", "Segoe UI", Arial, sans-serif;
  background: #f4f4f4;
  padding: 40px 20px;
  display: flex;
  justify-content: center;
}

.container {
  width: 100%;
  max-width: 720px;
  background: #fff;
  padding: 35px;
  border-radius: 18px;
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.12);
  transition: 0.25s;
}

h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 25px;
  text-align: center;
  letter-spacing: 0.5px;
}

.product {
  display: flex;
  gap: 28px;
  align-items: center;
  margin-bottom: 30px;
}

.product img {
  width: 180px;
  border-radius: 14px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.14);
}

.info h3 {
  font-size: 22px;
  margin-bottom: 6px;
  font-weight: 600;
  letter-spacing: 0.4px;
}

.price {
  font-size: 20px;
  color: #ff6a00;
  margin-bottom: 10px;
  font-weight: 700;
}

.qty {
  display: flex;
  align-items: center;
  margin-bottom: 14px;
}

.qty label {
  margin-right: 10px;
  font-weight: 600;
  font-size: 16px;
}

.qty input {
  width: 80px;
  padding: 8px;
  border-radius: 10px;
  border: 1px solid #ccc;
  font-size: 16px;
  outline: none;
}

p {
  font-size: 18px;
  font-weight: 500;
  margin-top: 5px;
  letter-spacing: 0.3px;
  color: #333;
}

/* BUTTON */
.btn-primary {
  width: 100%;
  margin-top: 25px;
  padding: 16px;
  font-size: 20px;
  background: linear-gradient(90deg, #ff7a00, #ff4e00);
  color: white;
  border: none;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.8px;
  box-shadow: 0 4px 14px rgba(255, 88, 0, 0.4);
  transition: 0.25s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(255, 88, 0, 0.5);
}

/* =============================
        MOBILE RESPONSIVE
============================= */
@media (max-width: 600px) {

  body {
    padding: 20px;
  }

  .container {
    padding: 22px;
    max-width: 100%;
  }

  .product {
    flex-direction: column;
    text-align: center;
    gap: 18px;
  }

  .product img {
    width: 150px;
  }

  h2 {
    font-size: 26px;
  }

  .info h3 {
    font-size: 20px;
  }

  p {
    font-size: 17px;
  }

  .btn-primary {
    font-size: 18px;
    padding: 14px;
  }
}

/* =============================
       LARGE LAPTOP / DESKTOP
============================= */
@media (min-width: 1024px) {

  .container {
    padding: 45px 55px;
  }

  h2 {
    font-size: 34px;
  }

  .product img {
    width: 210px;
  }

  .info h3 {
    font-size: 24px;
  }

  .price {
    font-size: 22px;
  }

  p {
    font-size: 20px;
  }

  .btn-primary {
    font-size: 22px;
  }
}