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

        body {
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            background-color: #000;
            color: #fff;
            font-family: 'Arial', sans-serif;
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
        }

        /* Efeito de glow no fundo */
        body::after {
            content: '';
            position: absolute;
            width: 200vmax;
            height: 200vmax;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(0,0,0,0) 70%);
            animation: glow 8s infinite;
            z-index: -1;
        }

        .container {
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .error-code {
            font-size: 15vw;
            font-weight: 900;
            text-shadow: 0 0 20px rgba(255,255,255,0.3);
            margin-bottom: 1rem;
        }

        .message {
            font-size: 1.5rem;
            letter-spacing: 2px;
        }

        /* Botão de tema */
        .theme-toggle {
            position: fixed;
            top: 20px;
            right: 20px;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: none;
            background: rgba(255,255,255,0.1);
            color: #fff;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .theme-toggle:hover {
            background: rgba(255,255,255,0.2);
            transform: scale(1.1);
        }

        /* Modo claro */
        body.light-mode {
            background-color: #fff;
            color: #000;
        }

        body.light-mode::after {
            background: radial-gradient(circle, rgba(0,0,0,0.1) 0%, rgba(255,255,255,0) 70%);
        }

        body.light-mode .theme-toggle {
            color: #000;
            background: rgba(0,0,0,0.1);
        }

        @keyframes glow {
            0%, 100% { transform: scale(1) rotate(0deg); }
            50% { transform: scale(1.2) rotate(180deg); }
        }

        @media (max-width: 768px) {
            .error-code {
                font-size: 120px;
            }
            
            .message {
                font-size: 1rem;
            }
        }