body {
    margin: 0;
    padding: 0;
    background: #f4f5f7;
    font-family: "Segoe UI", sans-serif;
}

.validation-container {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 30px;
}

.validation-card {
    width: 100%;
    max-width: 560px;
    background: #fff;
    border-radius: 18px;
    padding: 35px;
    box-shadow: 0 15px 40px rgba(0,0,0,.12);
    border-top: 6px solid #d71920;
}

.logo-container {
    text-align: center;
    margin-bottom: 15px;
}

    .logo-container img {
        max-width: 260px;
        width: 100%;
        height: auto;
    }

.security-badge {
    text-align: center;
    color: #198754;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 15px;
}

.validation-card h2 {
    text-align: center;
    color: #d71920;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
    line-height: 1.5;
}

.form-group {
    margin-bottom: 18px;
}

    .form-group label {
        display: block;
        margin-bottom: 7px;
        font-weight: 600;
        color: #333;
    }

.form-control {
    width: 100%;
    box-sizing: border-box;
    padding: 13px;
    border: 1px solid #d9d9d9;
    border-radius: 8px;
    font-size: 14px;
    transition: .2s;
}

    .form-control:focus {
        outline: none;
        border-color: #d71920;
        box-shadow: 0 0 0 4px rgba(215,25,32,.15);
    }

textarea.form-control {
    resize: vertical;
}

.captcha-container {
    margin-top: 20px;
    padding: 15px;
    border: 1px solid #e5e5e5;
    border-radius: 10px;
    background: #fafafa;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

    .captcha-container label {
        margin: 0;
        font-size: 14px;
        line-height: 1.4;
    }

#btnEnviar {
    width: 100%;
    margin-top: 25px;
    border: none;
    border-radius: 8px;
    padding: 15px;
    background: #d71920;
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: .2s;
}

    #btnEnviar:hover {
        background: #b9151b;
    }

.success-message {
    margin-top: 20px;
    text-align: center;
    padding: 15px;
    border-radius: 8px;
    background: #e8f5e9;
    color: #1b5e20;
    font-weight: 600;
}