body {
    margin: 0;
    font-family: Arial;
    background: #0f172a;
    color: white;
}

header {
    display: flex;
    justify-content: space-between;
    padding: 20px;
    background: #020617;
}

nav a {
    margin-left: 20px;
    color: white;
    text-decoration: none;
}

.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;

    text-align: center;
    padding: 20px;

    background: radial-gradient(circle at center, #1e293b, #020617);
    position: relative;
    overflow: hidden;
}

/* эффект свечения */
.hero::before {
    content: "";
    position: absolute;
    width: 600px;
    height: 600px;
    background: #38bdf8;
    filter: blur(150px);
    opacity: 0.2;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
}

.hero-content {
    position: relative;
    max-width: 800px;
    z-index: 1;
}

.hero h1 {
    font-size: 42px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    color: #cbd5f5;
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
}

button.secondary {
    background: transparent;
    color: #38bdf8;
    border: 1px solid #38bdf8;
}

.section {
    padding: 60px 20px;
    text-align: center;
    border-bottom: 1px solid #1e293b;
}

h2 {
    margin-bottom: 30px;
}

.grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.card {
    background: #1e293b;
    padding: 20px;
    border-radius: 10px;
    width: 250px;
    transition: 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    background: #334155;
}

.card img {
    width: 100%;
    border-radius: 10px;
}

input {
    display: block;
    margin: 10px auto;
    padding: 10px;
    width: 250px;
    border: none;
    border-radius: 5px;
}

button {
    padding: 10px 20px;
    background: #38bdf8;
    border: none;
    color: black;
    cursor: pointer;
    border-radius: 5px;
}

footer {
    padding: 20px;
    text-align: center;
    background: #020617;
}