body {
    margin: 0;
    font-family: Arial, sans-serif;
    color: #fff;
    background: linear-gradient(135deg, #1e1e2f 0%, #2a2a40 50%, #1b1b28 100%);
    background-attachment: fixed;
    overflow-x: hidden;
}

/* Умные узоры */
body::before {
    content: "";
    position: absolute;
    top: -20%;
    left: -20%;
    width: 140%;
    height: 140%;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(255,255,255,0.05) 0%, transparent 60%),
        radial-gradient(circle at 80% 70%, rgba(255,255,255,0.04) 0%, transparent 60%),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size:
        400px 400px,
        500px 500px,
        60px 60px,
        60px 60px;
    z-index: 0;
}

.panel {
    position: relative;
    z-index: 1;
    background: rgba(43, 43, 61, 0.85);
    padding: 40px;
    border-radius: 12px;
    width: 340px;
    box-shadow: 0 0 25px rgba(0,0,0,0.5);
    text-align: center;
    backdrop-filter: blur(6px);
}

button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 6px;
    background: #61dafb;
    color: #000;
    font-size: 15px;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background: #52c2e8;
}

input {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border-radius: 6px;
    border: none;
    background: #3a3a4f;
    color: #fff;
}

/* Карточки */
.card {
    background: rgba(255,255,255,0.05);
    padding: 20px;
    border-radius: 10px;
    margin: 15px;
    width: 200px;
    display: inline-block;
    text-align: center;
}

/* Мобильная адаптация */
@media screen and (max-width: 600px) {
    .panel {
        width: 90%;
        padding: 20px;
    }

    .card {
        width: 100% !important;
        margin: 10px 0 !important;
    }

    input, button {
        font-size: 14px;
        padding: 10px;
    }

    h2 {
        font-size: 20px;
    }
}