* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Arial, sans-serif;
}

body {
    background: linear-gradient(135deg,#0F2027,#203A43,#2C5364);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
}

.container {
    text-align: center;
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(8px);
    padding: 50px 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,.35);
    max-width: 550px;
    width: 90%;
}

.error-code {
    font-size: 110px;
    font-weight: bold;
    color: #FFD54F;
    line-height: 1;
}

.emoji {
    font-size: 60px;
    margin: 20px 0;
}

.title {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 15px;
}

.message {
    font-size: 18px;
    color: #e4e4e4;
    line-height: 1.6;
    margin-bottom: 35px;
}

.btn {
    display: inline-block;
    text-decoration: none;
    background: #ff9800;
    color: #fff;
    padding: 14px 35px;
    border-radius: 30px;
    font-size: 17px;
    font-weight: 600;
    transition: .3s;
}

    .btn:hover {
        background: #fb8c00;
        transform: translateY(-3px);
        box-shadow: 0 8px 18px rgba(0,0,0,.3);
    }

.small-text {
    margin-top: 25px;
    font-size: 14px;
    color: #d0d0d0;
}

@media(max-width:600px) {
    .error-code {
        font-size: 80px;
    }

    .title {
        font-size: 26px;
    }

    .message {
        font-size: 16px;
    }
}