.not-found-page {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
    background: radial-gradient(circle at center, #0a001f 0%, #000 80%);
    color: #fff;
    font-family: "Inter", sans-serif;
    text-align: center;
}

/* Canvas фон */
#neon-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

/* Контент поверх волн */
.not-found-content {
    position: relative;
    z-index: 2;
    padding: 40px;
    background: rgba(10, 0, 40, 0.6);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 0 40px rgba(108, 99, 255, 0.4);
    animation: fadeIn 1.2s ease-out;
}

.not-found-illustration {
    width: 180px;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 20px #6c63ff);
}

.not-found-content h1 {
    font-size: 90px;
    font-weight: 800;
    margin: 10px 0;
    background: linear-gradient(90deg, #6c63ff, #ff66cc, #00e5ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.not-found-content h2 {
    font-size: 28px;
    margin-bottom: 8px;
}

.not-found-content p {
    font-size: 16px;
    color: #bbb;
    margin-bottom: 25px;
}

.back-home {
    display: inline-block;
    padding: 12px 28px;
    background: #6c63ff;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: 0.3s;
    box-shadow: 0 0 10px #6c63ff;
}

.back-home:hover {
    background: #ff66cc;
    box-shadow: 0 0 20px #ff66cc;
    transform: translateY(-2px);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}