body {
    font-family: Arial, sans-serif;
    background-image: url('/images/404.png');
    background-size: cover;
    background-position: center center;
    background-attachment: fixed;
    background-color: var(--background-color);
    position: relative;
    min-height: 100vh;
    overflow-x: hidden;
}

body::before {
    display: none;
}

main {
    text-align: center;
    padding: 40px 8px;
    max-width: 98vw;
    margin: 32px auto;
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    position: relative;
    z-index: 1;
    background: rgba(0, 0, 0, 0.65);
    border-radius: 18px;
    backdrop-filter: blur(4px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.img-container {
    width: 100%;
    max-width: 350px;
    aspect-ratio: 16 / 10;
    margin-bottom: 32px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    display: flex;
    justify-content: center;
    align-items: center;
    background: #222;
}

.img-container img {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
    border-radius: 10px;
    filter: drop-shadow(0 0 10px rgba(0, 0, 0, 0.4));
}

h1 {
    font-size: 4rem;
    margin-bottom: 12px;
    color: #fff;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

h2 {
    font-size: 2rem;
    margin-bottom: 16px;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

strong {
    display: block;
    font-size: 1.3rem;
    margin-bottom: 18px;
    color: #fff;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

p {
    font-size: 1.25rem;
    margin-bottom: 32px;
    line-height: 1.6;
    color: #fff;
    max-width: 480px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.btn-voltar {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 30px;
    background: linear-gradient(145deg, #ffffff, #e6e6e6);
    color: #000;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    font-size: 1.2rem;
    border: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
    font-weight: bold;
    position: relative;
    overflow: hidden;
    margin-bottom: 24px;
}

.btn-voltar::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: 0.5s;
}

.btn-voltar:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(145deg, #ffffff, #cccccc);
}

.btn-voltar:hover::before {
    left: 100%;
}

.btn-voltar i {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.btn-voltar:hover i {
    transform: scale(1.15);
}

@media (max-width: 600px) {
    main {
        padding: 16px 2vw;
        max-width: 100vw;
        margin: 0;
        border-radius: 8px;
        min-height: 100vh;
    }
    .img-container {
        max-width: 95vw;
        aspect-ratio: 16 / 10;
        margin-bottom: 24px;
    }
    h1 {
        font-size: 2.5rem;
    }
    h2 {
        font-size: 1.3rem;
    }
    strong {
        font-size: 1.1rem;
    }
    p {
        font-size: 1.05rem;
    }
    .btn-voltar {
        padding: 10px 18px;
        font-size: 1rem;
    }
}

@media (max-width: 360px) {
    .img-container {
        max-width: 98vw;
    }
    h1 {
        font-size: 2rem;
    }
    h2 {
        font-size: 1rem;
    }
    strong, p {
        font-size: 0.95rem;
    }
    .btn-voltar {
        padding: 8px 12px;
        font-size: 0.9rem;
    }
}

@media (max-height: 700px) {
    main {
        padding: 12px 8px;
    }
    
    .img-container {
        max-height: 200px;
        margin-bottom: 12px;
    }
    
    h1 {
        font-size: 3rem;
        margin-bottom: 4px;
    }
    
    h2 {
        font-size: 1.2rem;
        margin-bottom: 6px;
    }
    
    p, strong {
        margin-bottom: 12px;
    }
}