html, body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
   overflow-x: hidden;
    height: 100%;
    position: relative;

  }
 .dropdown-container
    {
      display: inline-block;
      position: relative;

    }
    .dropdown-menu
    {
            background-color: rgb(255, 255, 255);
     
      border: 1px solid #ccc;
      min-width: 150px;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
      z-index: 999;
      opacity: 0;
      transform: translateY(5px);
      transition: opacity 0.3s ease, transform 0.3s ease;
      pointer-events: none;

    }
     .dropdown-menu i
    {
       margin-left: 3px;
       margin-right: 3px;
    }
    .dropdown-menu a
    {
       display: block;
      padding: 10px;
      color: #444;
      font-size: 13px;
      text-decoration: none;
      transition: 0.3s ease;
    }
    .dropdown-menu a:hover
    {
       background-color: #dfdfdf;
      font-size: 15px;
    

    }
    .dropdown-container:hover .dropdown-menu
    {
      transform: translateY(0px);
      opacity: 1;
      pointer-events: auto;
    }

  @keyframes redMove {
    0% {
      transform: translate(0, 0);
    }

    50% {
      transform: translate(30%, 30%);
    }

    100% {
      transform: translate(0, 0);
    }
  }
    .title-bar {
      height: 50px;
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(30px);
      width: 100%;
      position: fixed;
      z-index: 1000;
      top: 0;
      left: 0;
      background: rgba(255, 255, 255, 0.5);
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: 0.3s ease;
      box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
      padding: 0 10px;
    }

    .title-bar:hover {
      box-shadow: 0px 4px 10px rgba(14, 14, 14, 0.384);
    }
    

    .img-logo {
      height: 40px;
      margin-left: 10px;
    }

    .control-button-container {
      display: flex;
      height: 50px;
    }

    .button-control,
    .button-control-close,
    .button-control-maximize {
      height: 100%;
      width: 50px;
      border: none;
      background-color: rgba(255, 255, 255, 0);
      transition: 0.3s ease;
     
      cursor: pointer;
      height: 50px;
    }
    .button-control:hover{
      background-color: rgba(173, 173, 173, 0.493);
    }
    .button-napsodu
    {
        margin-left: 10px;
        height: 100%;
      width: fit-content;
     border: none;
      background-color: rgba(255, 255, 255, 0.5);
      transition: 0.3s ease;
     
      cursor: pointer;
      
    
    }
    
    .button-napsodu:hover
    {
        background-color: rgba(202, 202, 202, 0.5);
        
    }
   
    .button-control-close:hover {
      background-color: rgba(215, 216, 216, 0.5);
      color: red;
    }

    .button-control-maximize:hover {
      background-color: rgba(215, 216, 216, 0.5);
      color: blue;
    }

    .menu {
        opacity: 0.5;
      position: fixed;
      top: 40%;
      left: -40px;
      width: 50px;
      height: 210px;
      display: flex;
      flex-direction: column;
      backdrop-filter: blur(10px);
      background: rgba(255, 255, 255, 0.2);
      align-items: center;
      border: 0.1rem solid rgb(177, 177, 177);
      border-radius: 15px;
      transition: left 0.3s ease;
      z-index: 1001;
    }

    .menu:hover {
        opacity: 1;
      left: 5px;
      border: 0.1rem solid rgb(146, 146, 146);
    }

    .menu i {
      margin-top: 10px;
    }

    .menu-btn {
      background: transparent;
      border: none;
      margin: 1px 0;
      cursor: pointer;
      padding: 8px;
      border-radius: 10px;
      transition: 0.3s ease;
    }

    .menu-btn i {
      font-size: 20px;
      color: rgb(73, 70, 70);
      transition: 0.3s ease;
    }
    .menu-btn i:hover {
      font-size: 20px;
      color: rgb(10, 106, 231);
    }
    .menu-btn:hover {
      background: rgba(255, 255, 255, 0.3);
    }

  .intro-text {
  
  margin-left: 40px;
  color: #333;
  font-size: 20px;
  padding: 0;
  text-align: center;

}
.floating-container {
  width: 100%;
  overflow: hidden;
  position: relative;
  background: transparent;
  padding: 20px 0;
}

    .container-1 {
      margin-left: 1.3%;
      display: flex;

    }
    
.floating-track {
  display: flex;
  width: fit-content;
  animation: slideLeft 20s linear infinite;
}

.floating-box {
  width: 350px;
  min-height: 200px;
  margin: 0 15px;
  background: rgba(255, 255, 255);
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
 text-align: left;
  font-weight: bold;
 transform: scale(1);
  font-size: 18px;
  transition: 0.3s ease;
}
.floating-box:hover {
  transform: scale(1.03);
}
.floating-box p
{margin-left: 25px;margin-top: 20px;line-height: 20px; margin-right: 30px;}

@keyframes slideLeft {
  0% {
    transform: translateX(0);
  }

  100% {
    transform: translateX(-50%);
  }
}
.button-buy
{
    background-color: rgb(105, 240, 105);
    border: none;
    color: white;

}
    .box-1 {
          

      margin-left: 20px;
      background-color: rgba(255, 255, 255, 0.6);
      backdrop-filter: blur(20px);
      width: 29%;
      height: 150px;
      border-radius: 10px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
      padding: 15px 20px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }

    .box-1 p:first-child {
      font-weight: bold;
      font-size: 14px;
      margin: 0;
    }

    .box-1 p:nth-child(2) {
      font-size: 28px;
      font-weight: 600;
      margin: 0;
      margin-top: 5px;
    }

    .box-1 i {
      font-size: 70px;
      color: #00aecf;
      position: absolute;
      bottom: 10px;
      right: 15px;
      opacity: 0.2;
    }

    .chart-container {
        background-color: rgba(255, 255, 255, 0.6);
      backdrop-filter: blur(20px);
      padding: 30px;
      border-radius: 10px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
      width: 40%;
      
      margin-left: 2.1%;
      margin-top: 20px;
    
     
    }
    
    table {
      border-collapse: collapse;
      width: 500px;
      background: white;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
      border-radius: 12px;
      overflow: hidden;
    }
      th, td {
      padding: 15px;
      text-align: center;
      border-bottom: 1px solid #ddd;
    }

    th {
      background-color: #007bff;
      color: white;
      font-size: 18px;
    }

    td:last-child {
      text-align: center;
    }

    
    .buy-btn-android,
    .buy-btn-windows,
    .l-close {
      background-color: #ffffff;
      color: rgb(0, 0, 0);

      padding: 10px 20px;
      border: 0.1rem solid black;
      border-radius: 8px;
      cursor: pointer;
      font-weight: bold;
      transform: scale(1);
      transition: 0.3s ease;
      
    }

    .buy-btn-android i
    {
      color: #3DDC84;
    }
    .buy-btn-windows i
    {
      color: #0078D7;
    }
    .buy-btn-windows:hover
    {
         background-color: #0d6efd;
         color: white;
         box-shadow: 0 0 15px #0d6efd,
              0 0 30px #0d6efd,
              0 0 60px #0d6efd;
              border: none;
              transform: scale(1.03);

    }
    .l-close:hover
    {
         background-color: #ff0000;
         color: white;
         box-shadow: 0 0 15px #ff0000,
              0 0 30px #ff0000,
              0 0 60px #ff0000;
              border: none;
              transform: scale(1.03);

    }
    
    .buy-btn-windows:hover i
    {
         color: white;

    }
    .buy-btn-android:hover
    {
         background-color: #3DDC84;
         color: white;
         box-shadow: 0 0 15px #3DDC84,
              0 0 30px #3DDC84,
              0 0 60px #3DDC84;
              border: none;
              transform: scale(1.03);

    }
    .buy-btn-android:hover i
    {
         color: white;

    }
    .contact-btn {
      background-color: #ffc107;
      color: black;
      padding: 10px 20px;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      font-weight: bold;
    }

   
.footer {
  background-color: #222;
  color: white;
margin-top: 30px;
  padding: 15px 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  line-height: 10px;
}
.footer p{
  margin-left: 20px;
}
     #box-err {
      background: white;
      position: fixed;
      top:50%;
      left: 50%;
     margin: 0;
      width: 40%;
      height: 45%;
      transform: translate(-50%, -50%) scale(0.8); /* gộp lại */
    border-radius: 20px;
    align-items: center;
   text-align: center;
    display: flex;
   

    flex-direction: column;
    transition: 0.3s ease;
    }
     #overlay {
      position: fixed;
      top: 0; left: 0;
      width: 100%; height: 100%;
      backdrop-filter: blur(0px);
      background-color: rgba(0, 0, 0, 0.3);
      opacity: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      pointer-events: none;
      transition: backdrop-filter 0.6s ease, opacity 0.6s ease;
    }
 
  #overlay-01 {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100dvh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 9999;
  overflow: hidden; /* tránh cuộn */
}


  #overlay-01.active {
    opacity: 1;
    pointer-events: all;
  }

 #box-thong-bao-start {
  background: white;
  width: 90vw;              
  max-width: 500px;
  max-height: 90dvh;
  overflow-y: auto;
    scrollbar-width: none;       
  -ms-overflow-style: none;        
  border-radius: 10px;
  padding: 20px;
  position: relative;
  transform: scale(0.95);
  transition: transform 0.3s ease;
  box-sizing: border-box;
}

  #overlay-01.active #box-thong-bao-start {
    transform: scale(1);
  }

  #box-thong-bao-start h2 {
    color: #d32f2f;
    margin-bottom: 10px;
  }

  .close-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 20px;
    cursor: pointer;
    color: gray;
  }
.ruler {
  width: 100%;
  height: 1px;
  background-color: gray;
}
  .close-btn:hover {
    color: black;
  }

  .highlight {
    color: red;
    font-weight: bold;
  }

  .yellow-box {
    background-color: yellow;
    border-radius: 10px;
    padding: 6px;
    margin: 10px 0;
    font-weight: bold;
  }

  .youtube-wrapper {
    
    margin-top: 15px;
    width: 100%;
  }
  .youtube-wrapper iframe{
    border-radius: 10px;
    width: 100%;
  }
.center-wrp
{
   display: flex;
  justify-content: center; /* căn giữa theo chiều ngang */
  align-items: center;     /* căn giữa theo chiều dọc */
 height: 100vh;
}
    #overlay.active {
      backdrop-filter: blur(5px);
      opacity: 1;
      pointer-events: all;
    }
#overlay.active #box-err{
       transform: translate(-50%, -50%) scale(1); 
    }
    .youtube,
    .facebook,
    .github
    {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      transition: 0.3s ease;
      border: none;

    }
   .youtube i,
    .facebook i,
    .github i
    
    {
      font-size: 20px;
    }
    .youtube:hover
    {
      transform: scale(1.05);
      box-shadow: 0px 0px 15px red,
                  0px 0px 30px red,
                  0px 0px 60px red;
      background-color: red;
      color: white;
      border: none;
      cursor: pointer;

    }
    .new-video
    {
      justify-content: space-between;
      display: flex;
      margin-top: 3%;
      width: auto;
      padding: 30px;
      background-color: #eeeeee73;
      transition: 0.3s ease;
    }
    .new-video:hover
    {
      background-color: #a8a8a873;
    }
    .new-video iframe
    {
      margin-left: 15%;
    }
     .facebook:hover
    {
      transform: scale(1.05);
      box-shadow: 0px 0px 15px #0059ff,
                  0px 0px 30px #0059ff,
                  0px 0px 60px #0059ff;
      background-color: #0059ff;
      color: white;
      border: none;
      cursor: pointer;

    }
    .button-buy:hover
    {
      cursor: pointer;
      transform: scale(1.09);
    }
     .github:hover
    {
      transform: scale(1.05);
      box-shadow: 0px 0px 15px rgb(255, 255, 255),
                  0px 0px 30px rgb(255, 255, 255),
                  0px 0px 60px rgb(255, 255, 255);
      background-color: black;
      color: white;
      border: none;
      cursor: pointer;

    }
   .box-center
   {
   

    border-radius: 10px;
    width: 50%;
    height: 50%;
    padding: 50px;
    height: fit-content;
    background-color: rgb(255, 255, 255);
    border: 0.1rem solid black;

   }
   
    .box-center .title-text
   {
   
    font-size: 20px;
    font-weight: bold;
   }
     .box-center .span
   {
   
    font-size: 15px;
    

   }
   .text-box
   {
    border-radius: 10px;
    width: 120px;
  
    background-color: white;
    border: 0.1rem solid rgb(110, 110, 110);
    transition: 0.3s ease;
    padding: 10px;
   }
   .brands-choose
   {
    display: flex;
    flex-direction: row;
    
   }
   .brands-choose button
   {
    background-color: white;
    border-radius: 20px;
    border: 0.1rem solid rgb(0, 0, 0);
    cursor: pointer;
    transition: 0.3s ease;
    width: 180px;
    
   }
    .brands-choose button
   {
    margin-left: 10px;
    margin-top: 10px;
    
   }
   .brands-choose button:hover
   {
    border: 0.1rem solid rgb(4, 181, 212);
   }
   .brands-choose button img
   {
    border-radius: 20px;
    width: 100px;

    
   }
   .item-2
   {
    display: block;
   }
   .text-box:focus{
border: 0.1rem solid rgb(219, 3, 183);
outline: none;
   }
   .container-box-napthe
   {
    display: flex;
    flex-direction: column;
    
    
   }
    .container-box-napthe input+input
   {
    margin-top: 10px;
   }
   .button-nap-tien
   {
    width: 100%;
    margin-top: 20px;
    height: 45px;
    font-size: 20px;
    font-weight: bold;
    background: linear-gradient(to right,rgba(25, 0, 255, 0.562),rgb(248, 0, 215),rgba(255, 0, 0, 0.425));
    border-radius: 10px;
    border: none;
    color: white;
      background-size: 200% 100%;
  background-position: left;
  cursor: pointer;

    transition: 0.3s ease;
   }
   .button-nap-tien:hover{
      background-position: right;

   }
   
   .text-box
   {
    width: 90%;
   }
    @media screen and (max-width: 768px) {
      .brands-choose
      {
        flex-direction: column;
       
      }
      .text-box
      {
        width: 50%;
      }
      .i2 
      {
        display: none;
      }
      .item-2
   {
    display: none;
   }
      .center-wrp
      {
         height: 130vh;   
      }
      .title-bar
      {
        font-size: 10px;
      }
  .footer {
    flex-direction: row;
    align-items: center;
    text-align: center;
    font-size: 10px;
  }
  .buy-btn-windows
  {
    display: none;
  }
  .new-video
  {
    display: none;
  }
}