* {
    padding: 0;
    margin: 0;
}

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

html, body {
    height: 100%;
}

body{
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto; 
    grid-template-areas:
    "header"
    "main"
    "footer";
    height: 100%;
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    background-color: #F4F4F4;
}

/* --- HEADER --- */
header{
    padding: 16px;
    grid-area: header;
    display: flex;
    flex-direction: column; 
    align-items: center; 
    justify-content: center;
    
    background-color: #333333; 
    color: #FFFFFF; 
    /* УСИЛЕННАЯ ТЕНЬ для лучшего визуального эффекта */
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.25); 
    
    height: auto; 
    flex-wrap: wrap;
    position: relative; /* Для контекста z-index, если понадобится */
}

header img {
    width: 25%; 
    max-width: 100px;
    height: auto;
    transition: transform 0.3s ease;
    margin-bottom: 8px; 
}
header img:hover {
    transform: scale(1.05);
}

h1{
    font-size: 30px; 
    margin: 0; 
    text-align: center;
    letter-spacing: 1px;
}

/* --- MAIN CONTENT --- */
main{
    grid-area: main;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-around;
    padding: 20px;
}

.blockRandom{
    width: 90%; 
    max-width: 400px;
    height: 150px; 
    
    border: 2px solid #5A5A5A;
    border-radius: 8px; 
    background-color: #FFFFFF; 
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05); 
    
    display: flex; 
    justify-content: center;
    align-items: center;
    font-size: 2em;
    font-weight: bold;
}
.numberRandom{
        width: 90%; 
    max-width: 400px;
    height: 150px; 
    
    border: 2px solid #5A5A5A;
    border-radius: 8px; 
    background-color: #FFFFFF; 
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05); 
    
    display: flex; 
    justify-content: center;
    align-items: center;
    font-size: 2em;
    font-weight: bold;
}

/* --- FOOTER --- */
footer{
    grid-area: footer;
    display: flex;
    height: auto; 
    padding: 16px 20px; 
    flex-direction: column;
    justify-content: center;
    align-items: center;
    
    background-color: #4A4A4A;
    color: #DDDDDD;
    font-size: 0.9em;
    border-top: 3px solid #777777;
    /* ДОБАВЛЕНИЕ ТЕНИ для футера (тень вверх) */
    box-shadow: 0 -4px 8px rgba(0, 0, 0, 0.15); 
}

footer p {
    margin: 4px 0;
    font-size: small;
}


/* ======================================= */
/* 🖥️ СТИЛИ ДЛЯ ДЕСКТОПОВ (min-width: 768px) */
/* ======================================= */
@media (min-width: 768px) {
    
    /* --- HEADER --- */
    header{
        flex-direction: row; 
        /* Используем space-between для разделения элементов */
        justify-content: space-between; 
        padding: 12px 50px; 
        height: 100px; /* Сохраняем высоту */
    }

    header img {
        /* Увеличение размера изображения */
        width: 80px; 
        max-width: 80px;
        margin-right: 40px; /* Увеличиваем отступ справа от логотипа */
        margin-bottom: 0;
    }
    
    h1{
        font-size: 25px; 
        flex-grow: 1; 
        text-align: left;
        /* Сдвиг текста чуть правее: используем margin-left */
        margin-left: 20px;
    }

    /* --- MAIN CONTENT --- */
    .blockRandom{
        width: 500px;
        height: 600px; 
        font-size: larger;
        display: flex;
        flex-direction: column;
        gap: 10px;
        padding: 20px;
        align-items: center;
        justify-content: space-evenly;
    }
    .numbers{
        display: flex;
        gap: 5px;
    }
    .pool{
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        padding-bottom: 10%;
    }
    .countBlock{
        display: flex;
        flex-direction: column;
    }
    .numberRandom{
        width: 250px;
        height: 200px; 
    }

    
    /* --- FOOTER --- */
footer{
        padding: 12px 50px; 
        flex-direction: row; 
        justify-content: center;
    }
.custom-btn {
    width: 130px;
    height: 40px;
    color: #fff;
    border-radius: 5px;
    padding: 10px 25px;
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    font-weight: 500;
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    display: inline-block;
    box-shadow:inset 2px 2px 2px 0px rgba(255,255,255,.5),
    7px 7px 20px 0px rgba(0,0,0,.1),
    4px 4px 5px 0px rgba(0,0,0,.1);
    outline: none;
    font-size: large;
}
.btn-3 {
  background: rgb(0,172,238);
    background: linear-gradient(0deg, rgba(0,172,238,1) 0%, rgba(2,126,251,1) 100%);
  width: 250px;
  height: 80px;
  line-height: 80px;
  padding: 0;
  border: none;
  
}
.btn-3 span {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
}
.btn-3:before,
.btn-3:after {
  position: absolute;
  content: "";
  right: 0;
  top: 0;
   background: rgba(2,126,251,1);
  transition: all 0.3s ease;
}
.btn-3:before {
  height: 0%;
  width: 2px;
}
.btn-3:after {
  width: 0%;
  height: 2px;
}
.btn-3:hover{
   background: transparent;
  box-shadow: none;
}
.btn-3:hover:before {
  height: 100%;
}
.btn-3:hover:after {
  width: 100%;
}
.btn-3 span:hover{
   color: rgba(2,126,251,1);
}
.btn-3 span:before,
.btn-3 span:after {
  position: absolute;
  content: "";
  left: 0;
  bottom: 0;
   background: rgba(2,126,251,1);
  transition: all 0.3s ease;
}
.btn-3 span:before {
  width: 2px;
  height: 0%;
}
.btn-3 span:after {
  width: 0%;
  height: 2px;
}
.btn-3 span:hover:before {
  height: 100%;
}
.btn-3 span:hover:after {
  width: 100%;
}
.btn{
   display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 30%;
}
#num1{
    width: 75px;
    height: 20px;
}
#num2{
    width: 75px;
    height: 20px;
}
#count{
    width: 100px;
    height: 20px;
}
.countBlock{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-top: 30%;
}
}